The Spotlight Report

Kashmira Nakhoda on The Journey from Large Optics Metrology to X-Ray Synchrotron Application Design and Metrology

The Spotlight Report — Wed, 02 Oct 2024 12:56:00 GMT

Dr. Kashmira Nakhoda sat down to discuss her journey through optics. Kashmira shared her early work on metrology and scattering modeling of the DKIST 4.2 m primary mirror and how she progressed to X-Ray synchotron application metrology and design. She also explored what makes a lab group, or any group, great to be a part of, how to continue learning, and how she has arrived at her current position of having a consulting business, RayKi Consulting. This was a really great discussion, and Kashmira shared not only her incredible optics knowledge, but also her valuable perspective on a career in optics. I hope you enjoy as much as I did.

References:

DKIST Fabrication and Metrology: http://www.loft.optics.arizona.edu/documents/journal_articles/DKIST_SPIE_2016_CJO.pdf2)
PSD from Smooth Surfaces: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/8838/883805/Use-of-the-surface-PSD-and-incident-angle-adjustments-to/10.1117/12.2024612.short
PSF Wikipedia: https://en.wikipedia.org/wiki/Point_spread_function
Instantaneous Sagnac Interferometer: https://www.sciencedirect.com/science/article/abs/pii/S0030399222003255?via%3Dihub
Coded Aperture for X-Ray Fluorescence Full Field Imaging: https://onlinelibrary.wiley.com/iucr/doi/10.1107/S1600577520012308
Jonathan Livingston Seagull: https://www.amazon.com/Jonathan-Livingston-Seagull-Richard-Bach/dp/147679331X
2D PSF Prediction for Multiple Reflections: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9961/1/Two-dimensional-PSF-prediction-of-multiple-reflection-optical-systems-with/10.1117/12.2235410.short#_=_
Novel Methods in PSF Prediction (Dissertation): https://www.politesi.polimi.it/handle/10589/133575?locale=it

Travis Sawyer on Early Cancer Detection with Multimodal Optical Imaging

The Spotlight Report — Fri, 06 Sep 2024 15:00:00 GMT

Dr. Travis Sawyer, Professor of Optical Sciences, Biomedical Engineering, Electrical and Computer Engineering, Health Sciences, and Medicine, was kind enough to speak with me about how multimodal optical imaging can improve early cancer diagnosis in ovarian and esophageal cancers. Travis discusses existing diagnostic methods, the need for improved techniques and why OCT, two-photon imaging, and fluorescence hold potential for cancer diagnostics. He expanded upon how these methods can be combined in a compact physical form via endocscopy, and the challenges with combining imaging results, and the future for the field. I hope you enjoy as much as I did; Dr. Sawyer is advancing not only a highly interesting field, but one that holds a potential for improving humanity in a very tangible way. Links: 1) Dr. Sawyer's Lab - Biomedical Optics and Optical Measurement Laboratory: https://wp.optics.arizona.edu/tsawyer/ 2) Dr. Sawyer's Dissertation: https://repository.arizona.edu/handle/10150/657772 3) Dr. Jennifer Barton's Lab: https://bmeoptics.engr.arizona.edu/

4) Texture Analysis of OCT in ovarian tissue: https://iopscience.iop.org/article/10.1088/1361-6560/aaefd2/meta

5) Evaluation of illumination system uniformity for wide-field biomedical hyperspectral imaging :https://iopscience.iop.org/article/10.1088/2040-8986/aa6176/meta

6)Fluorescence and Multiphoton Imaging for Tissue Characterization of a Model of Postmenopausal Ovarian Cancer: https://onlinelibrary.wiley.com/doi/abs/10.1002/lsm.23251

7) Milford Track: https://www.newzealand.com/us/feature/milford-track/

Hyemin Yoo on the Sine Condition Test, Deflectometry, and Optical Alignment

The Spotlight Report — Thu, 01 Aug 2024 12:22:00 GMT

I spoke with Hyemin Yoo, who recently completed her dissertation on a combined Sine Condition/Deflectometry test method for optical alignment. Hyemin discusses the methodology in detail, starting with an introduction to the background of optical alignment, the sine condition test, and deflectometry. She then explores how to define a robust test approach, including simulations and as built test methods. Her approach, termed SCT+, provided an excellent optical alignment performance, in simulated and real world tests, of tens of nanometers. I hope you enjoy. Links 1) Contact Hyemin directly for her dissertation: ⁠hyoo030@arizona.edu⁠ 2) Alignment with a combination of deflectometry and the sine condition test ⁠https://opg.optica.org/ao/abstract.cfm?uri=ao-62-7-1677 3) Pioneers in Optics: Ernst Abbe (1840-1905) https://academic.oup.com/mt/article/17/1/38/6820661?login=false 4) Fundamentals of Geometrical Optics by Virendra Mahajan https://spie.org/Publications/Book/2053717#_=_ 5) J.H. Burge, C. Zhao, M. Dubin, and S. Lampen. Determination of off-axis aberrations of imaging systems using on-axis measurements. In Novel Optical Systems Design and Optimization XIV, volume 8129, page 81290F. SPIE, 2011. Backup Publisher: International Society for Optics and Photonics. 6) T.T. Elazhary, P. Zhou, C. Zhao, and J.H. Burge. Generalized sine condition. 54(16):5037–5049, 2015. Publisher: OSA.

Eric Goodwin on Interferometry, Optics, and Metrology

The Spotlight Report — Fri, 12 Jul 2024 15:25:00 GMT

Eric Goodwin wrote the Field Guide to Interferometric Testing, and now is the Director of Optical Sciences at Nikon Research Corporation of America. In his work, he has undoubtedly worked on cutting edge optical systems and products, providing him a unique insight into delivering reliable solutions at the forefront of optical products. Eric discusses his deep background in optical metrology and testing, and additionally shares insights regarding managing complex optics projects and teams. Lastly, I had the pleasure of sharing stories with Eric regarding our own experiences working with Dr. Barrett and Dr. Greivenkamp.

References:

1) Field Guide to Interferometric Optical Testing

2) Nikon Optics Research

2) Campbell, E W, Phillion, D W, and Sommargren, G E. Sub-nanometer interferometry for aspheric mirror fabrication. United States: N. p., 1999. Web.

3) An example of the use of point diffraction interferometry 4) Theory and Application of Point-Diffraction Interferometers

Joel Berkson on Fringe Metrology and Starting an Optical Metrology Company

The Spotlight Report — Mon, 20 May 2024 13:14:00 GMT

Joel Berkson sat down to discuss forming his optical metrology company, Fringe Metrology. Joel discusses the ups and downs of creating a startup, why more people should try it, and how to evaluate a product market fit before diving in head first. Joel expands on how they have refined Fringe Metrology's product fit and offerings to meet market needs, particularly in the area of metrology for larger, often rougher surface optical elements. This was a great conversation, an it was a delight to hear Joel's passion and candid reflection on his experience forming a business.

Links:

Company Website: https://www.fringemetrology.com/
Joel's Dissertation: https://repository.arizona.edu/handle/10150/670875
NSF I-Corp Program: https://new.nsf.gov/funding/initiatives/i-corps

Pearl John on Utilizing Holography for Art and Outreach

The Spotlight Report — Wed, 24 Apr 2024 14:49:00 GMT

Dr. Pearl John sat down to discuss her work in art, holography, and optics outreach. Pearl discusses her artwork, which touches upon both the very human side of time, memories, and relationships, as well as pieces that help to promote and explain complex science topics. Throughout her work, a common feature is the use of art, and holograms, to convey and speak to these concepts. In addition, or perhaps as part of, her art, Pearl also has been active in performing optics outreach, and fostering excitement and joy at learning more about optics. Pearl's work is remarkable, and her approach helps to explore the boundary between art, science, and humans involved in both. I hope you enjoy as much as I did! Resources: 1) Pearl's Website: https://www.pearljohn.co.uk/ 2) Lights Express: http://www.lightexpress.soton.ac.uk/ 3) Robotic Vision and Virtual Interfacings, Pearl John as co-author: https://edinburghuniversitypress.com/book-robotic-vision-and-virtual-interfacings.html Artists working with Holography 5) Paula Dawson PhD- To Absent Friends (large transmission hologram art piece of a working bar https://vimeo.com/74709932 (Video) 6) Isabel Azevedo PhD: Artist specialising in large format digital animated holography: https://www.isabelazevedo.com/ Holography Galleries and Exhibitions (including educational facilities). 7) The Center for Holographic Arts (HoloCenter) USA https://holocenter.org/artist (Features work by Margaret Benyon PhD- a UK artist who was the first to use Holography as an art medium) and Pearl John. 8) Gallery 286 - and the Jonathan Ross Holography collection. UK. http://www.jrholocollection.com/ London UK. The collection is open to the public on invitation. Please contact Jonathan Ross to request a visit. 9) Dados Negros Contemporary Art and Holography , Madrid, Spain. https://www.dadosnegros.com/exposicio... (Exhibition I'm featured in 11 May - 8 September 2024. Photonics Outreach activities Pearl has been involved with: 10) The Future Manufacturing Photonics Hub - outreach resources: https://www.photonicshubuk.org/outreach/ at the University of Southampton. 11) Photonics Workshop ideas for teachers/educators (including Holography Workshops) http://www.phablabs.eu/photonics-work... Photographer we discussed: 12) Julia Margaret Cameron (1815 – 1879) was one of the most important early photographers and is now recognized the world over as a pioneer of photography as art. Her home and studio in the Isle of Wight UK has been turned into a museum/permanent exhibition: https://www.dimbola.co.uk/

Wayne Geerling on Using Pop Culture and Chat GPT In Teaching Economics

The Spotlight Report — Mon, 01 Apr 2024 14:09:00 GMT

Wayne Geerling discusses his research and work in utilizing pop culture to engage students in introductory Economics courses. Pop culture, from Squid Game to Taylor Swift, can tell us quite a lot about various core economics concepts, and Dr. Geerling has leveraged the accessiblity and appeal of pop culture to engage early students, providing them with strong motivation to continue pursuits an otherwise math heavy and technically intimidating field. Wayne additionally comments on the new reality of Chat GPT and how it has impacted the university classroom, and his approaches to adapting to this new reality. Overall, I see a lot synergy between Wayne's work in pedagogy as it applies towards economics, and how it could apply to optics or other technical and math heavy fields. Additionally, his approach to Chat GPT is fascinating and seems like it will be universally true for teaching at any level. This was a really fun interview for me, Wayne was a wonderful guest. I hope you enjoy! Links: 1) "ChatGPT has Mastered the Principles of Economics: Now What?" https://dx.doi.org/10.2139/ssrn.4356034 2) "The Economics Behind the Billions: How Taylor Swift and MrBeast Can Be Used to Teach Economics" https://dx.doi.org/10.2139/ssrn.4640484 3) "Using Squid Game to Teach Game Theory" https://dx.doi.org/10.2139/ssrn.3990316 4) The Rest is History Podcast: https://therestishistory.com/episodes/

Bill Green on Looking Up, Street Astronomy, and Light Pollution

The Spotlight Report — Wed, 28 Feb 2024 15:33:00 GMT

NOTE: If you or someone you know has achromatic doublets they would donate to Bill for his street astronomy, reach out! Bill is looking for doublets and his contact info can be found at philly moon men, or you can comment below. This time we are joined by Bill Green, who was a founder of Philly Moon Men. Bill brought street astronomy to Philadelphia and found there was a lot of enthusiasm and wonder at simply looking up at the night sky. Bill discusses light pollution, how he does street astronomy, and how to spread awareness about light. Links: https://phillymoonmen.org/ https://www.celestron.com/

Donn Silberman on a Career in Optics, Education, and Outreach

The Spotlight Report — Tue, 13 Feb 2024 03:10:43 GMT

This week I spoke with Donn Silberman, who first entered optics in 1976 as a high school student, getting involved in astronomy. Donn shared his insights from his career in optics, in not only engineering but also sales and management. Additionally, he discussed founding the Optics Institute of Southern California and his outreach work. We talked about how he has fostered outreach to get others of all ages interested and involved in optics and how other can also join in on these endeavors. It was a pleasure to speak with Donn and to hear his continued enthusiasm and work to get more people interested in optics!

Relevant Links:

Donn's Bio at OSSC: https://ossc.clubexpress.com/content.aspx?page_id=22&club_id=239344&module_id=61827

Donn's Website (with links to other resources!): https://donn601.wixsite.com/opticsage

Donn's Talk at 2024 Photonics West: https://www.linkedin.com/posts/americom-optics_join-us-for-this-important-panel-discussion-activity-7151260300296556544-CYaH?utm_source=share&utm_medium=member_android

Dr. Eva Acosta on Visual Optics, Wavefront Coding, and Imaging through Cataracts

The Spotlight Report — Mon, 18 Dec 2023 14:03:00 GMT

Dr. Eva Acosta sat down to share her research in the area of visual optics. She discussed how she entered the field of optics and specific visual optics, her work on wavefront coding, cataract imaging, and intraocular lenses. It was a pleasure to speak with Dr. Acosta and her work is not only incredibly interesting, but stands in that unique realm of also having very tangible benefits for humanity. I hope you enjoy!

Youtube Video version: https://youtu.be/EncOAKDRwaU?si=8K_qMA3Izmb2ohES

ELEO Forum: https://community.eleoptics.com/t/dr-eva-acosta-on-visual-optics-wavefront-coding-and-imaging-through-cataracts/360?u=lrgraves Resources: Dr. Acosta's ResearchGate page, listing most publications: https://www.researchgate.net/profile/... Jacobi-Fourier Masks: https://www.spiedigitallibrary.org/co... Improvement of Retinal Images Affected by Cataracts: https://www.mdpi.com/1581236

Heejoo Choi on Innovative Optical Designs

The Spotlight Report — Mon, 05 Sep 2022 23:33:44 GMT

In this episode, I sat down with Heejoo Choi. Heejoo recently won the Kevin P. Thompson Optical Design Innovator Award He won the award for an innovative UV cross-dispersion space telescope and engineering of a laser-truss LBT metrology system. He is currently an assistant research professor at the James C. Wyant College of Optical Sciences and an Optical Scientist at the Large Binocular Telescope.

Heejoo discusses the motivations for why innovative designs were required in the LBT metrology system as well as the Hyperion cross-dispersion space telescope. He goes into what drove the design choices and how that impacted the system performance overall. These are both cutting-edge optical designs so I am sure the audience will have a lot to explore in both.

You can contribute to help support The Spotlight Report!

Youtube video version here.

Resources:

1. Andrew Rakich, Heejoo Choi, Christian Veillet, John M. Hill, Matthieu Bec, Yang Zhang, Trenton Brendel, Breann Sitarski, Michael Gardiner, Dae Wook Kim, Stephanie Rodriguez, "A laser-truss based optical alignment system on LBT," Proc. SPIE 11445, Ground-based and Airborne Telescopes VIII, 114450R (13 December 2020); https://doi.org/10.1117/12.2558013

2. Heejoo Choi, Isaac L. Trumper, Yi-Ting Feng, Hyukmo Kang, Joel Berkson, Haeun Chung, Erika T. Hamden, Dae Wook Kim, "Long-slit cross-dispersion spectroscopy for Hyperion UV space telescope," J. Astron. Telesc. Instrum. Syst. 7(1) 014006 (12 March 2021) https://doi.org/10.1117/1.JATIS.7.1.014006

Link to read paper ungated

David Shafer on His Philosophy of Optical Design

The Spotlight Report — Wed, 03 Aug 2022 18:31:47 GMT

In this episode, I sat down with David Shafer. David has been creating incredible and cutting edge lens designs for decades; my first introduction to his work were his free slides he posted which looked like magic to me at the time. David discusses how he got into optics, his background in philosophy and how that guided his approach to optical design, and his optical design methodology. He also touches upon his insights about operating as a consultant, and how he created a successful career in optical design consulting. Overall this has been one of favorite interviews, David's experience and thoughts on optical design is incredible and I hope you enjoy the episode as well.

You can contribute to help support The Spotlight Report!

Youtube video version here.

Discuss the episode here.

Resources:

David Shafer’s Slideshare webpage with all of his freely shared presentations. Read them! They are great!
Innovation in Optical Design, A Short History slides presentation by David Shafer
Designing a Double Gauss Lens the Hard Way slides presentation by David Shafer
Optimum Design for a Fast Speed Lens slides presentation by David Shafer
Design Methods slide presentation by David Shafer
David Shafer’s Zeiss Talk Summer 2022
Man Versus Machine-A Lens Design Challenge Donald C. Dilworth, David Shafer,
Simple Method For Designing Lenses David Shafer,
Highlights of My 48 Years in Optical Design slide presentation by David Shafer. Demonstrates the lithography lens system and his design for Salvador Dali!
Some Unusual Telescope Designs slide presentation by David Shafer. Demonstrates the optical design sent on space missions mentioned.
A Perfect Lens Design Hiding in Plain Sight for 167 Years D. Shafer,
Principles of Optical Design by Born and Wolf. Maxwell’s Fishe-eye design is mentioned in section 4.2.
The scientific papers of James Clerk Maxwell Volume 1.. Maxwell discusses his fish-eye design in XVII.
Galaxy Quest Trailer. Seriously, watch it, a great sci-fi movie.

Graves on Creating a Science Startup

The Spotlight Report — Tue, 28 Jun 2022 21:07:47 GMT

In this episode, we do something a bit new, in that I am the person being interviewed by previous guest Kris Ford. I talk about my own perspectives on being a co-founder of ELE Optics, the general experience , fun, and stress of a startup. I do want to give warning this episode is lighter on technical aspects or science and instead focuses on our experience in business. Kris is an excellent interviewer and I believe sheds light on some interesting topics. We also touch upon Kris' experience in his own startup. If you are interested in my own thoughts on a startup, or hearing two scientists talk about the business and ethical considerations of forming a company, please give it a listen!

Help support The Spotlight Report!

View the Youtube video version of the episode here.

Resources:

1. Life After Faith

2. Meditations on Moloch

3. After Virtue

4. The Nuts and Bolts of a Business Plan MIT OpenCourse (free!)

5. West with the Night

6. Notes from the Underground

7. Master and Man (free!)

8. The Myth of Sisyphus

Bob Parks on the Point Source Microscope, Alignment, and Optics

The Spotlight Report — Sun, 22 May 2022 20:46:58 GMT

In this episode, Bob Parks discusses his background in optics. For those who are not aware, Bob has been a key figure in the world of optics, being a force to establish using an auto-stigmatic microscope for all sorts of alignment and assembly of optical systems (and that is only a small portion of his contributions). Bob explains how he entered optics, his early experiences at the Kodak company and how rich that experience was, his work on the Hubble Investigatory committee, and his work involved in creating the Point Source Microscope. We also explore recent innovations for using the PSM, and how computer generated holograms tie into these potentials. Bob is truly and incredible optical scientist, and was one of my favorite guests to interview. We only scratch the surface of topics I would like to discuss this episode but I highly recommend it.

After the end of the episode Bob shared a few more thoughts, which I am putting here. Bob Parks:"At the very end you asked me about advice for younger people and I mentioned diversity in interests. Another thing is being open to taking risks, much as you guys are. It is so much nicer to suggest a new adventure and have a yes response than no. And one other thing. As we talked about, science and engineering get you hard facts, and just one "right" answer. If a colleague gets a different answer, don't call them out, but ask what assumptions they made deriving their answer. That you differ is often that you have made different assumptions."

Show less

REPLY

Contribute to help support The Spotlight Report!

Video version of this episode can be viewed here. Comment and discuss the episode here.

Resources:

1. Optical Perspectives Group LLC , Bob Parks optical engineering company.

2. Alignment with Axicon Plane Gratings, by Robert Parks

3. Aligning Reflecting Optics with Bessel Beams, by Robert Parks

4. The Autostigmatic Microscope and How It Works, by Robert Parks

5. Hubble Space Telescope Secondary Mirror Vertex Radius/conic Constant Test Final Technical Report, by Robert Parks

6. A Canticle for Leibowitz, an excellent Sci-Fi book exploring meaning, ethics, and science.

Craig Ament on Thin Films, Entrepreneurship, and Founding Arizona Thin Films

The Spotlight Report — Thu, 07 Apr 2022 21:01:37 GMT

In this episode, Craig Ament discusses thin films and their near universal application in the optics industry. He comments on how he started his company, Arizona Thin Films, key considerations in incorporating films into a design, and what unique features his company provides. Craig also discusses some of the key lessons learned with regards to founding a company, and addressed common questions he gets when a customer needs a new thin film for their product. Highly recommended!

Discuss this episode on our forum

View the video version on Youtube

You can contribute to help support The Spotlight Report!

Resources:

Arizona Thin Films, Craig Ament’s company providing thin film coating and design services
Atomic Layer Deposition technology
Edmund Optics Introduction to Optical Coatings

David Aikens and Eric Herman on Modern Optical Drawings: The ISO10110 Companion

The Spotlight Report — Thu, 17 Mar 2022 23:58:48 GMT

I sat down with Dave Aikens and Eric Herman to discuss their recent book “Modern Optical Drawings: The ISO10110 Companion”, which they co-authored along with Richie Youngworth. I cannot recommend this book highly enough for those who need to get an optic made. It concisely serves as a companion reference book for when you need to know how to define certain aspects of your system, and it contains practical guides on how to utilize the ISO10110 standard in your design process to assure you get your system made correctly, from design to drawing to verification and testing. Dave and Eric discuss why they made the book, some of the art and subtleties behind what goes into getting a design made correctly, and the benefits of using the ISO10110 designation in your drawings.

View the video of the conversion on Youtube.

You can contribute to help support The Spotlight Report

Comment and discuss this episode with the optics community here.

Resources:

Modern Optics Drawings: The ISO 10110 Companion | (2022) | Herman | Publications | Spie
Official ISO10110 Drawing Standards
Optimax’s Tolerancing Sheet, the standard for where to start on tolerances.

Dr. Shelby D V Ament on Computer Generated Holograms, Metrology, and Art

The Spotlight Report — Mon, 21 Feb 2022 14:51:43 GMT

This week I spoke with Dr. Shelby D V Ament, who is currently a senior optical scientist at Arizona Optical Metrology. Shelby discusses how she decided to enter optics, why art was an essential aspect of arriving into the field, and her dissertation work pairing holograms and solar energy. She also discusses her passion for optics outreach and teaching the community and younger generation about optics. I have had the pleasure of working with Shelby in a professional role, and her knowledge and expertise in optics is consistently inspiring. I highly recommend this episode, for insights on how optics bridges seemingly unrelated areas like art, and for absolutely the best explanation of computer generated holograms, and how they are used in practice, that you can get anywhere.

Video Version: https://youtu.be/BA4HkQa9QBA

Additional Links:

Dr. Shelby D V Ament's LinkedIn
Arizona Optical Metrology, where you can work with Shelby if you need a CGH.
Dr. Ament's Dissertation, Vorndran, S. D. (2016). *Diffractive optical element design for lateral spectrum splitting photovoltaics* (Order No. 10109718). Available from Dissertations & Theses @ University of Arizona; ProQuest Dissertations & Theses Global. (1796855096).
Helmholtz On the Sensations of Tone: https://en.wikipedia.org/wiki/Sensations_of_Tone, the final reference to how harmonics impact the 'quality' of music.

Erin McDermott on creating Odd Engineer, overcoming obstacles, and determination

The Spotlight Report — Thu, 18 Mar 2021 19:43:04 GMT

This week we spoke with Erin McDermott, who has most recently created Odd Engineer, a service for companies to find experts in a field who they can quickly speak to for expert advice. Erin discusses how she got into optics, the many obstacles she faced along her career, and the stunning determination she has cultivated and maintained to get to where she is at now; namely being her own boss, and creating her own career. She also discusses her recently published book, Freelancer’s Framework, where she discusses how engineers of physical products can succeed as freelancers. I have had the pleasure of working with Erin in a professional role, and her knowledge of how to succeed and thrive in the world of optics, which she shares here, has been invaluable. I am sure listeners will find this episode to be a great resource.

Video version of this episode.

Episode forum, where you can comment and discuss this episode further and leave us feedback.

Additional Links:

* Odd Engineer, Erin’s platform securing expert engineering advice.

* Freelancer’s Framework, Guidebook 1, Erin’s recent publication.

* College Co-Op programs article from 2020.

* Bi-directional Reflectance Distribution Function (BRDF) pdf explaining the general concept.

* Youtube video of a Goniophotometer in action.

Henry Quach on how COVID has affected graduate research.

The Spotlight Report — Mon, 01 Feb 2021 16:44:06 GMT

In this episode, Henry Quach, who is in his third year of the Wyant College of Optics graduate program, discusses how his research has been affected by COVID-19. This is a fascinating topic as we discuss how this period of graduate school is already typically one of the more challenging yet formative phases of a graduate program, and Henry explores how the unique constraints have required creative inspiration on the student's part to maintain forward progress. We discuss mental health, research, and the meta-purpose of graduate school; and if all of that doesn't meet the science/engineering expectations for this podcast, Henry also shows off some very cool home built devices and 3D printed tools he has created.

For updates on Henry's, and the LOFT group's, research, see: http://www.loft.optics.arizona.edu/

For the full video of the episode, please visit: https://youtu.be/WsofGJlQ1IY

Julius Muschaweck on Illumination and Education

The Spotlight Report — Wed, 30 Sep 2020 22:00:00 GMT

Our guest this week is Julius Muschaweck, who has an extensive and impressive background in illumination. He discusses his prior work in the field, the importance of LEDs, and his current work on fostering education on this overlooked area of physics and creating an active illumination community. I greatly enjoyed this conversation, Julius is clearly an expert in illumination, and is excellent and teaching about these topics. I strongly encourage listeners to explore is personal page, his announced courses (I intend to attend them), and his free webinars, shared in the related resources section.

Related Resources:

Julius' Personal Website

Julius' LinkedIn Page

Julius' Illumination Course Announcement

OSRAM Company

Arri Cameras Company

Communities of Practice Introduction

Julius' Webinar "What is Etendue and Why is it Important?"

Julius' Webinar "Source Modeling in Illumination Optics"

Data Format Standard for Sharing Light Source Measurements

Discuss on the forum

Watch the youtube video of the discussion: https://youtu.be/YmOZ7lGkXPU

Dr. Araceli Venegas-Gomez on Qureca, Quantum Optics, and the future of quantum industry

The Spotlight Report — Fri, 14 Aug 2020 19:00:11 GMT

This week I had the pleasure of speaking with Dr. Araceli Venegas-Gomez. Araceli received her doctorate in Quantum Optics from the University of Strathclyde, and is the founder and CEO of Qureca, a company leading the way on creating and strengthening bridges between companies and the workforce in Quantum. We spoke in depth about how Araceli entered into quantum optics from being an aerospace engineer, why she created a quantum company, and what she views as the future of quantum industry and key skills needed by companies now. This was a very enjoyable conversation for me, and I learned quite a bit about an and field of quantum, which was previously very opaque and confusing. Dr. Venegas-Gomez's insight on the diversity of workforce needed for quantum, and the various avenues to enter the field were refreshing and eye opening to me for a field traditionally considered extremely esoteric and confined to the highest reaches of academia. Highly recommended.

Dr. Patrick Hagar on Material Chemistry, Films, Adhesives, and Finding Success and Innovation in Industry

The Spotlight Report — Thu, 12 Mar 2020 23:42:40 GMT

We were extremely fortunate to have Dr. Pat Hagar sit down with us for this episode. Pat received his doctorate in polymer material science, which provided him with a strong science background for his 30 year career at the 3M Corporation. Pat discusses some of the applications of films and adhesives that he worked on during his time at 3M, what driving factors motivate innovation and product development, and what optical considerations exist with respect to films and adhesives. Pat also speaks about his personal experience inside of a corporation, and how he found success and growth in his role and how to collaborate in industry, as team centric work becomes essential. Overall, I just want to say Pat is a hugely impressive scientist and engineer, and a fantastic person; I highly recommend this episode.

Dr Kris Ford on Plasma Physics, Analytical Chemistry, and Life After Graduate School

The Spotlight Report — Tue, 04 Feb 2020 04:23:56 GMT

This week Dr. Kris Ford sat down to talk about his dissertation topic on plasma physics, and his life after graduate school. Dr. Ford received his PhD in nuclear physics studying plasma diagnostic methods. After graduating, he has gone on to lead an analytical chemistry lab studying and classifying cannabis products. Dr. Ford shares interesting insight regarding receiving feedback that your dissertation topic may not be novel, how to complete a thesis, and what challenges exist in industry post graduation.

We have also shifted to a new format with the podcast, and we have a new host! Please let us know what you think of the new format.

Dr Heejoo Choi On Large Astronomical Optics

The Spotlight Report — Tue, 31 Dec 2019 16:37:29 GMT

This month Dr. Heejoo Choi sat down to discus active and adaptive optics measures utilized in a range of astronomical telescopes. Specifically, Dr. Choi’s work brings him into frequent contact with a unique subset of astronomical optics known as ‘extremely large telescopes’, which are designated as having a clear aperture larger than 10 meters. Dr. Choi explains what some of the tools and devices are that allow for keeping such massive optics and structures aligned throughout long exposure sessions and in variable environments. Related Reading: Dr. Heejoo Choi Profile: http://www.loft.optics.arizona.edu/members/post-doc/heejoo-choi/ Nonlinear Optics: https://en.wikipedia.org/wiki/Nonlinear_optics Large Binocular Telescope Observatory (LBT): http://www.lbto.org/ What are Active and Adaptive Optics: https://www.eso.org/sci/facilities/develop/ao/what_ao.html Telescope Seeing Limit: https://en.wikipedia.org/wiki/Astronomical_seeing Reference laser star-ARGOS for LBT: http://www.mpe.mpg.de/ir/argos Econtalk Gerd Gigerenzer on Gut Feelings: https://www.econtalk.org/gerd-gigerenzer-on-gut-feelings/ European Extremely Large Telescope (E-ELT): https://www.eso.org/sci/facilities/eelt/ Thirty Meter Telescope (TMT): https://www.tmt.org/ NASA Space Borne Balloon Telescopes: https://asd.gsfc.nasa.gov/balloon/ Wikipedia on Space Balloon Telescopes: https://en.wikipedia.org/wiki/Balloon-borne_telescope

Henry Quach On 3D Printing

The Spotlight Report — Tue, 03 Dec 2019 17:11:55 GMT

Henry Quach is in the graduate program for optical sciences, where he is pursuing his PhD. Henry has been an avid learner and fabricator in the 3D printing realm, both as a hobby and for research projects. He walks us through some of the cutting edge 3D printing technologies that have emerged, and explores what this means for rapid prototyping both in a research and industry application. Finally, Henry comments on the possible future trends for 3D printing. Related Reading: 1) FDM 3D printing: https://www.stratasys.com/fdm-technology 2) Thingaverse.com- free 3D models: https://www.thingiverse.com/ 3) Prussa I3 KM3: https://www.prusa3d.com/original-prusa-i3-mk3/ 4) Stereolithography: https://www.livescience.com/38190-stereolithography.html 5) Digital Light Processing: https://en.wikipedia.org/wiki/Digital_Light_Processing 6) CLIP-Continuous liquid interface production: https://en.wikipedia.org/wiki/Continuous_Liquid_Interface_Production 7) The Maker Movement: https://time.com/104210/maker-faire-maker-movement/ 8) Addressing Ethics of Synthetic Human Organs: https://elifesciences.org/articles/20674 9) 3D Printing a Miniature Human Heart: https://www.thenakedscientists.com/articles/interviews/3d-printing-mini-heart 10) A Swifter way of Printing Organs: https://www.sciencedaily.com/releases/2019/09/190906172436.htm 11) 3D Printing for Bioengineering: https://www.eurekalert.org/pub_releases/2016-08/cp-fwb081116.php

David Vega on Falloposcope Design and Biomedical Optics

The Spotlight Report — Tue, 03 Dec 2019 16:58:31 GMT

This week we sat down with optical scientist David Vega, who performs optical design in Dr. Jennifer Barton’s tissue optics lab at the University of Arizona. David discusses how he found his way into the optical design field, and specifically biomedical optics. From there, we discuss the challenges that endoscopy imposes on optical design, and the unique additional challenges encountered when designing endoscopes for ovarian cancer detection. Further Resources: 1) Dr. Barton’s Lab: http://bmeoptics.engr.arizona.edu/ 2) Ovarian Cancer Wikipedia Page: https://en.wikipedia.org/wiki/Ovarian_cancer 3) Histology Wikipedia Page, offers excellent images showing what a histologist will typically have to look through to make a diagnosis. :https://en.wikipedia.org/wiki/Histology

Dr. Hannah Grant on Opportunities and Challenges in Silicon Photonics

The Spotlight Report — Tue, 03 Dec 2019 16:55:13 GMT

This week we spoke with Dr. Hannah Grant, who completed her PhD at UCSD with a focus on photonics on silicon. We last spoke with Hannah about her prior research on optical switches. Today, Dr. Grant walks us through her dissertation, titled “Opportunities and Challenges in Silicon Photonics Systems”. In addition, Dr. Grant shares her outlook on the graduate process, advice for the job search, and where the future of optical communication may be. As always, we thank our guest Dr. Hannah Grant look forward to our listeners comments! References Dr. Hannah Grant’s Dissertation (Draft Version): http://www.airyinsights.com/wp-content/uploads/2018/12/HRG_Thesis_DraftVersion.pdf Optical Switches : https://en.wikipedia.org/wiki/Optical_switch Photonics: https://www.rp-photonics.com/photonics.html Crosstalk: https://en.wikipedia.org/wiki/Crosstalk

Lisa Li on Vision, Computer Science, and Culture

The Spotlight Report — Tue, 03 Dec 2019 16:53:16 GMT

This week we spoke with Lisa Li, who is a Ph.D. student at the College of Optics as University of Arizona. She completed her MSc at Newcastle University, where her thesis, title ‘Colour constancy modelling with a biologically-inspired neural network structure’ was jointly done between the Computer Science and Neuroscience departments, under advisers Prof. Marcus Kaiser and Prof. Anya Hurlbert. Lisa briefly discussed her past work at Newcastle. Additionally, she comments about the cultural differences she witnessed between graduate schools, and some of the unique experiences she has encountered as a woman in the sciences. Lisa Li shed light on a fascinating field of science which we all have intuitively experienced and provides valuable insight on how to navigate a career in the sciences! As always, we thank our guest Lisa Li and we eagerly look forward to our listeners comments! References: 1) Dr. Marcus Kaiser Dynamic Connectome Lab: https://www.dynamic-connectome.org/ 2) Dr. Anya Hurlbert Academic Profile: https://www.ncl.ac.uk/ion/staff/profile/anyahurlbert.html#background 3) Cell Q&A with Dr. Hurlbert and Matt Ridley 4) Introduction to Neural Networks: https://www.explainthatstuff.com/introduction-to-neural-networks.html 5) Youtube video on Neural Networks: https://www.youtube.com/watch?v=GvQwE2OhL8I 6) Neural networks and back propagation explained in a simple way: https://medium.com/datathings/neural-networks-and-backpropagation-explained-in-a-simple-way-f540a3611f5e 7) National Geographic’s ‘The Dress’ : https://www.nationalgeographic.com.au/science/blue-or-white-dress-why-we-see-colours-differently.aspx 8) What #theDress reveals about the role of illumination priors in color perception and color constancy :https://eprint.ncl.ac.uk/file_store/production/242764/A390CDB3-9ADA-442C-96FB-7877D8745520.pdf 9) Guggenheim’s Piet Modrian Profile: https://www.guggenheim.org/artwork/3014

Dr. Maham Aftab on Modal Integration

The Spotlight Report — Tue, 03 Dec 2019 16:48:56 GMT

In this weeks episode we sit down with Maham Aftab, who has an extensive background in the sciences as well as activism for a variety of causes. We discuss her most recent publication, in which she used Chebyshev gradient polynomials as a basis set for modal integration. She discusses the recursive nature of the polynomial set which allowed for her method to generate a high number of fitting polynomials. The integration’s ortho-normality is discussed, as well as its unique benefits and how it fits into the general universe of integration methods for slope data. Additionally, Maham speaks about her academic experience and her work in activism. Resources: Aftab’s Paper: Maham Aftab, James H. Burge, Greg A. Smith, Logan Graves, Chang-jin Oh, and Dae Wook Kim, “Modal Data Processing for High Resolution Deflectometry,” Int. J. of Precis. Eng. and Manuf.-Green Tech. (2018). (in press) Southwell Integration Paper: https://www.osapublishing.org/josa/abstract.cfm?uri=josa-70-8-998

Round Table 2: What is your reason for doing?

The Spotlight Report — Tue, 03 Dec 2019 16:47:28 GMT

In this round table we discuss the idea of equity and meaning behind a degree, specifically a higher education degree in optics (which I will come back to). The central question is whether or not there is a problem with the amount of work, or quality of work, behind the same degree between two people. It is assumed that this is an actual occurrence (with many anecdotal pieces of evidence offered). The conversation transitioned and two clear view points arose. On one hand, the idea that you determine the value of your degree, and outsiders values should not meaningfully impact your reason for a degree or how you go about achieving the degree. The counter view was that to some extent the college and its alumni affect one another, such as a alumni can promote or dissuade groups from hiring from your college or academic group, thus impacting your future employment. A final undercurrent throughout is the idea that there is some, undefined, threshold that students should achieve before they can graduate, although due to how hard it was to pin down this seems to be a likely culprit for why comprehensive exams, orals, and defenses are so hated; making a test that everyone agrees defines some threshold beyond which you are an expert is extremely difficult. Finally, I realized after listening again we entirely missed the mark by considering a wider scope, namely, outside of higher education, or optics, etc. This topic bears coming back to which we will hopefully do soon. Note: Image Credit Jeremy Perkins

Nirantha Balagopal on Industry, Optics, and Math

The Spotlight Report — Tue, 03 Dec 2019 16:45:51 GMT

This week we sat down with Nirantha Balagopal to discuss her current work in industry at Edmund Optics. She also talked about her prior masters work at the University of Arizona as well as her studies in math and its ongoing application towards everyday life. For all of our optical engineers out there this is a really great episode, as Balagopal provides extremely interesting thoughts about the transition and difference from academics to industry and very practical tips to know when interfacing with an optical component provider to make your project more likely to succeed. References: 1) Balagopal’s Master Thesis : https://www.optics.arizona.edu/sites/optics.arizona.edu/files/nirantha-balagopal-ms-report.pdf 2) Momsom on SPECT Imaging 3) The ABCs of Fluency: https://www.aubreydaniels.com/sites/default/files/ABCsofFluency_2015.pdf 4) SPIE Women in Optics Survey 2017: https://spie.org/about-spie/advocacy/women-in-optics/women-in-optics-survey?SSO=1 5) Society of Women Engineers: http://societyofwomenengineers.swe.org/ 6) Edmund Optics Youtube for Tutorials and Lessons: https://www.youtube.com/edmundoptics

Discuss, don't Lecture-Optics Roundtable No. 1

The Spotlight Report — Tue, 03 Dec 2019 16:39:52 GMT

This is the first optics roundtable conversation. The roundttable format is a new thing we are trying out, in which a group of scientists will gather over beers to discuss some interesting current topic in science. In this week’s episode Edward LaVilla and Neil Momson joined the conversation to discuss two interesting topics. First, what is the best approach to discussing science with someone who holds a view on some scientific topic that you deem to be irrational? Do you tell them they are wrong, scoff, lecture to them what you hold to be right? Edward LaVilla proposed engaging all people in a scientific conversation, holding all curious and engaged parties as equals, and only making a prerequisite demand that rational and honest ideas be presented and generally to hold a scientific conversation. Building off of this concept, we then moved on to discussing Aumanian conversations, and how we arrive at defending absolute truths and generally what science is. Resources and Links from this Episode: Common Knowledge and Aumann’s Agreement Theorem: https://www.scottaaronson.com/blog/?p=2410 Note: Image Credit to Nadine Shaabana

Dr. Edward LaVilla on Visual Optics, Inspiration, and the Spirit of Learning

The Spotlight Report — Tue, 03 Dec 2019 16:37:17 GMT

In this episode we sit down with the extremely dynamic Edward LaVilla, who is working on obtaining his doctorate in optical engineering. His work focuses on visual optics, although he has done research in a variety of other sub-fields inside of optics. Further, he brings the unique perspective of an entrepreneur, participating in the McGuire Entrepreneurship program at the University of Arizona and starting a small business. This is easily one of the most exciting and thought provoking interview we have done and I hope our listeners will enjoy. References: 1) Ibn al-Haytham “The Father of Optics”: https://www.photonics.com/a36717/Before_Newton_there_was_Alhazen 2) Roorda Lab: http://roorda.vision.berkeley.edu/ 3) Multmodal Retinal Imaging: https://www.amazon.com/Multimodal-Retinal-Imaging-Amresh-Chopdar/dp/1907816607 4)Statistical Model for Normal Eyes: http://iovs.arvojournals.org/article.aspx?articleid=2188017

Dr. Shuang Wu on Biostatistics

The Spotlight Report — Tue, 03 Dec 2019 16:36:21 GMT

This week we spoke with Dr. Shuang Wu, who received his doctorate in research relating to embryonic stem cell work. He decided to slightly alter his research focus and began working on bio-statistics. Dr. Shuang Wu shares his insights on what bio-statistics means for the average person, the nuances in statistical work with applications in biological systems, and the ethical consequences of bio-statistics work in the real world.

Spencer on Podiatry

The Spotlight Report — Tue, 03 Dec 2019 16:33:14 GMT

Daniel Spencer is a medical student who will be receiving his doctorate in podiatric medicine in May. This is an often overlooked field of medicine, which focuses on the foot, ankle, and lower leg area. Daniel sheds light on the field, current important topics in podiatry, as well as general insight and advice regarding medical school. Episode Resources 1) Neuropathy : https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets/Peripheral-Neuropathy-Fact-Sheet 2) Ford on plasma research and nuclear engineering : https://soundcloud.com/user-981189121/ford-on-plasma-research-and-nuclear-engineering

Dr. Abdullah Zafar on plasma diagnostics for nuclear fusion

The Spotlight Report — Tue, 03 Dec 2019 16:31:30 GMT

This week we spoke with Abdullah Zafar, whose work focuses on diagnostics of plasma. Zafar discusses how optical spectroscopy can be used to study plasma effects and dynamics, which leads to a more robust understanding of plasma. There is some very interesting and cutting edge engineering at play in Zafar’s work, allowing him to attain extremely high resolution high accuracy spectroscopic results of scans of a plasma field in only two dimensions. Further, we discuss current and future plasma applications, graduate school, and Zafar shares words of advice for those considering or in the early stages of their research career. References and Resources for this episode: 1) ITER: https://www.iter.org/

Dr. Kris Ford on Plasma Research and Nuclear Engineering

The Spotlight Report — Tue, 03 Dec 2019 16:29:48 GMT

Dr. Kris Ford sat down to discuss plasma research, higher education, and motivation. At the time of this interview, Dr. Ford was a Ph.D. candidate in nuclear engineering, specifically plasma research. He discusses the intricacies of his current work, including the ultra high precision fabrication capabilities and the statistical uncertainties related to the methods used. Further, we explore the motivations and challenges of remaining mentally healthy when engaged in high demand work, and some approaches to overcome the challenges associated with such a situation. References: 1) 4-START:Fourth State Applications Research Group (Research group Mr. Ford is currently part of): http://www4.ncsu.edu/~scshanno/index.html 2) Mindset: The new psychology of succes by Dr. Carol S. Dweck: https://read.amazon.com/kp/embed?asin=B000FCKPHG&preview=newtab&linkCode=kpe&ref_=cm_sw_r_kb_dp_QcAQAb3FR107Y 3) Vasimr plasma engine: http://www.spaceflightinsider.com/conferences/humans-to-mars/vasimr-plasma-engine-earth-mars-39-days/ Note: Photo Credit: Kris Ford. An oxygen plasma is created, which should have a cylindrical shape due to the powering coil shape. Ionization occurs in the power deposition region. In this case, an ‘orb’ forms however, a phenomenon currently unexplained.

Dr. John Koshel on Illumination, the Century of Light, and Academics

The Spotlight Report — Tue, 03 Dec 2019 16:21:34 GMT

Dr. John Koshel, the Associate Dean as the College of Optical Sciences at the University of Arizona sat down to discuss illumination, the Century of Light, and academics. Dr. Koshel has a long background in optical sciences, ranging from laser based research in graduate school at Rochester to illumination engineering in industry, and most recently as a researcher and Associate Dean. Dr. Koshel expands on what illumination engineering is, his current research, the century of the photon and what we can expect in the future from optics, and his perspectives on graduate school and research. We really enjoyed speaking with Dr. Koshel and think that our listeners will get an enormous amount of knowledge and wisdom from this episode. Relevant material to this episode: Century of Optics: https://www.osapublishing.org/books/bookshelf/osa-century-optics.cfm

Oliver Spires on Optical Fabrication

The Spotlight Report — Tue, 03 Dec 2019 16:19:17 GMT

This week Oliver Spires sat down to discuss optical fabrication. This is a topic often taken for-granted by optical scientists, as optical fabrication is the conversion of a theoretical component to a real and usable piece. Oliver discusses techniques and methodologies such as diamond turning and mold pressed optics. Additionally, some of the difficulties and limitations of these methods are covered. Related Reading: 1)Science Direct on Diamond Turning: https://www.sciencedirect.com/topics/engineering/diamond-turning 2)Edmund Optics on Diamond Turning Optics: https://www.edmundoptics.com/capabilities/diamond-turning/ 3) Wikipedia Article on Glass Moulding: https://en.wikipedia.org/wiki/Precision_glass_moulding

Dr. Cooper-Sood on using Ketamine for Pain Management in Sickle Cell Anemia Patients

The Spotlight Report — Tue, 03 Dec 2019 16:14:03 GMT

Dr. Johnathan Cooper-Sood sits down to discuss his research on novel pain management methods in patients who suffer from sickle cell anemia. These patients suffer extreme, chronic life long pain. Dr. Cooper-Sood discusses the current pain management protocol, which traditionally relies heavily on large opiate dosages, and how ketamine may provide an alternative pain management tool. Additionally, Dr. Cooper-Sood comments on some of the unique challenges human based studies carry, and what the future may hold for pain management in such cases. We hope you enjoy and as always we encourage our listeners to comment or email us! Related Reading: 1) Dr. Cooper-Sood on Seat Belts for Children: https://insights.ovid.com/crossref?an=00006565-900000000-98148 2) Dr. Cooper-Sood on Pediatric Pneumonia: https://europepmc.org/article/MED/30943363 3) Ketamine for Sickle-Cell Anemia: https://sicklecellanemianews.com/ketamine/ 4) Low Dose Ketamine for Adults with Sickle-Cell Anemia: https://www.tandfonline.com/doi/abs/10.1080/15360288.2018.1468383?journalCode=ippc20

Dr. Chris Summitt on Optic Chip Interconnects

The Spotlight Report — Tue, 03 Dec 2019 15:57:03 GMT

Dr. Chris Summitt talks about a new fabrication process of a polymer out-of-plane optical coupler by gray-scale lithography. Dr. Summitt discusses the motivation for optical chip interconnects, the limitations on fabrication methods, and his novel technique and results. Additionally, he comments on the fit of graduate school for students, as well as sharing some techniques for maintaining a healthy balance while a student. As always we look forward to your feedback and comments!

Hannah Grant on Characterizing Silicon Photonic Switches

The Spotlight Report — Mon, 02 Dec 2019 15:22:24 GMT

Hannah Grant discusses her work which focuses on Silicon Photonics. Most recently she has developed and demonstrated a heuristic characterization of Si-Photonic switches. While Si-Photonics is impressive technology, a characterization method has been lacking. Hannah covers her recent work, the scope and uses of Si-Photonics, and the need for a characterization of optical switches. For a more detailed description of Hannah Grant’s most recent work, please see: https://doi.org/10.1364/PS.2017.PTu3C.1 Related Reading: 1) Heuristic Characterization of Photonic Switches : https://doi.org/10.1364/PS.2017.PTu3C.1 2)Photonics: Optical Electronics in Modern Communications by By Amnon Yariv and Pochi Yeh (https://www.amazon.com/Photonics-Electronics-Communications-Electrical-Engineering/dp/0195179463)

Neil Momsen on SPECT Imaging

The Spotlight Report — Mon, 02 Dec 2019 15:12:53 GMT

Neil Momsen, a graduate student whose research focuses on biomedical imaging applications, explains the working concept for a SPECT imaging system. There is discussion covering the system components, theory, noise, and statics. Neil sheds some light on a device we take for granted in medical procedures but which is extremely complex both in the hardware and data processing. As always, please leave your feedback and comment on today's episode. Related Reading: 1) Anger Mathematics: http://mathworld.wolfram.com/AngerFunction.html 2)SPECT Imaging Wikipedia: https://en.wikipedia.org/wiki/Single-photon_emission_computed_tomography

Dr. Christine Bradley on Spectropolarimetric Observations

The Spotlight Report — Mon, 02 Dec 2019 15:01:40 GMT

Dr. Christine Bradley discusses her doctoral work on spectropolarimetric imaging, which was used to map the polarimetric BRDF of various Earth based zones. An alternative way to thinking about this is a mapping of the reflectance of various common zones on Earth. Dr. Bradley discusses some of the challenges she faced in her work and and outcome of her research. Additionally, she shares excellent tips about getting through research and dissertation writing. We hope you enjoy this weeks podcast, and as always we encourage our listeners to comment on this weeks episode. Related Reading/ Viewing: 1) Dr. Bradley's Dissertation Defense: https://www.facebook.com/10135028/videos/10106093474570012/ 2) Spectral Invariance Theory: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9613/96130U/Spectral-invariance-hypothesis-study-of-polarized-reflectance-with-Ground-based/10.1117/12.2187495.short 3) SpectroPolarimetric Imaging Observations by Dr. Christine Bradley: https://repository.arizona.edu/handle/10150/624499 Note: Image Credit to Chris Summitt.

Dr. Chase Salsbury on the Unspoken Challenges of Graduate School

The Spotlight Report — Mon, 02 Dec 2019 14:50:43 GMT

This week we sit down with Chase Salsbury and have a candid conversation about some of the common challenges graduate students face, particularly ones that are not often spoken of outside of grad students. This is a topic that we think is extremely important to talk about and we hope you enjoy the podcast. As always if you have comments or feedback please let us know! Related Reading: 1) https://blogs.sciencemag.org/pipeline/archives/2018/03/26/depression-and-anxiety-in-graduate-school 2)https://blogs.scientificamerican.com/observations/the-emotional-toll-of-graduate-school/

Dae Wook Kim on Large Optics

The Spotlight Report — Mon, 01 May 2017 00:00:00 GMT

Dr. Dae Wook Kim is the head of the LOFT group at the College of Optics at the University of Arizona. While his original background was in astronom, he came to the University of Arizona and completed his PhD in optical sciences. His dissertation covered computer controlled surface figuring for fabrication of complex large extremely large optics. From there, Dr. Kim has contributed to a wide range of academic research projects as well as fabrications of various optics, including the 4.2 m DKIST primary mirror. We sit down with Dr. Dae Wook Kim to learn about his current deflectometry and fabrication research projects, what he finds most exciting in optics right now, and what projects he hopes to do in the future. To learn more about Dr. Dae Wook Kim’s recent work, we recommend reading his recent publication in Business Insider discussing how the world’s largest mirrors are created. The publication can be found at: http://www.loft.optics.arizona.edu/documents/journal_articles/TheConveration_BM_DKim_2016Jan.pdf

Graves on Infrared Deflectometry

The Spotlight Report — Mon, 24 Apr 2017 00:00:00 GMT

This week we discuss infrared deflectometry and its applications towards large optics fabrication. By utilizing a long wavlength, surfaces that are not reflective in the visible are able to be tested using deflectometry. Some of the challenges that went into the IR deflectometry system, including source design, geometry considerations, and source errors are discussed. Additionally, Graves comments on his experience in being part of the team that performed metrology for the 4.2 m DKIST primary mirror. For more information on infrared deflectometry please read: http://www.loft.optics.arizona.edu/documents/journal_articles/IR_Deflectometry_SPIE_Newsroom_2015_DKim.pdf Thank you for listening to this weeks episode. If you have any questions or comments please let us know. Additionally, we are always looking for new topics to cover, so please email or comment to let us know who should be in the spotlight in the future.

The Large Optics and Fabrication Group

The Spotlight Report — Mon, 10 Apr 2017 00:00:00 GMT

This week we introduce the first series for The Spotlight Report, which will be the LOFT Group. The LOFT Group (large optics and fabrication technology) focuses on metrology research, such as CGH’s and deflectometry, as well as fabrication breakthroughs, including polishing methods, materials, and control. Tune in to see what the LOFT Group is all about and to get an idea of the topics we will be covering in the coming episodes of this series! Also, this week we mentioned swing arm profilometry, which was indeed created in the LOFT Group. You can find the journal article discussing the swing arm profilometer at: http://www.loft.optics.arizona.edu/documents/journal_articles/Anderson%20Proc%20SPIE%202536.pdf

Trumper on Instantaneous Phase Shifting Deflectometry

The Spotlight Report — Sun, 19 Mar 2017 00:00:00 GMT

We sit down this week with Isaac Trumper to discuss his new work on an instantaneous phase shifting deflectometry system he developed and deployed on an iPhone. His work allows for dynamic metrology of optical surfaces in an extremely low cost form. Background: Deflectometry is a specific method used to optically measure a surface shape. The concept is based on a simple principle, if a candle is lit and we hold it at a known position in front of a reflective surface, also at a known position, and then move our eye until we see the candle, we can calculate the slope of the mirror. By doing this for all points on a mirror, we can integrate the surface slopes to arrive at a surface profile. If instead of a candle we upgraded to a screen, we can now display very complex images to illuminate the entire mirror surface at once, allowing us to calculate all the surface slopes without moving our source. A source image used commonly is a sinusoidal pattern, which is phase shifted a number of times. This pattern is presented in the x and y orthogonal directions to obtain x and y slope maps, which allows for the calculation of a complete surface map. One previous limitation to this method is that the screen had to display each phase shifted sinusoid consecutively. This is no longer the case, as Isaac Trumper recently has proven that the phase shifts can be encoded into different color channels, red, green, and blue, of the screen. This allows for three simultaneous phase shifted sinusoids to be presented at once. Additionally, using Fourier transform techniques, Trumper was able to encode the x and y sinusoid patterns simultaneously, allowing for one screen to be showing a total of 3 unique patterns in the x direction, and 3 unique patterns in the y direction; i.e. 6 multiplexed channels at once. This allows for a single display and image capture to entirely capture all the required information to completely solve for the surface profile of your optic under test. For a complete description of the work done, please see Isaac Trumper’s recent paper, located at http://www.loft.optics.arizona.edu/documents/journal_articles/oe-24-24-27993_DKim.pdf .