Henry Quach, Ph.D.
Optical Scientist/EngineerGreetings!
I am an Optics Ph.D. from the University of Arizona. My research was in the field of precision optical metrology, where I worked in optical/illumination design, image processing, and optomechanical engineering. Prior to this, I graduated from Duke University as a first-gen college student. See: [CV] [Resume] [Google Scholar].
Current Role: I develop optical diagnostic modules for EUV lithography light sources at ASML.
Research
I worked with the Large Optics Fabrication and Testing Group (LOFT) on exciting and super rad techniques to measure freeform optics. I defended in November 2022 and my defense slides and official dissertation are publically available.
Journal Papers
1. L.R. Graves, H. Quach, H. Choi, and D.W. Kim, "Infinite deflectometry enabling 2π-steradian measurement range," Opt. Express 27, 7602-7615 (2019). [Optica Spotlight, April 2019]
2. L.R. Graves , H.Quach, R.J. Koshel, C.J. Oh, and D.W. Kim, "High contrast thermal deflectometry using long-wave infrared time modulated integrating cavity source," Opt. Express 27, 28660-28678 (2019).
3. D.W. Kim, G. Smith, M. Dubin, A. Lowman, C.J. Oh, H. Quach, H. Kang, H. Yoo, I. Trumper, L.R. Graves, M. Aftab, C. Davila-Peralta, J. Hyatt, and H. Choi, "Advances in reconfigurable optical metrology, characterization, and data analysis," Journal of Physics: Photonics (2020).
4. D.W. Kim, H. Choi, T. Brendel, H. Quach, M. Esparza et al., "Advances in Optical Engineering for Future Telescopes," Opto-Electronic Advances (2021). [Featured Article in AAAS EurekaAlert, July 2021]
5. H. Kang, H. Quach, J. Berkson, M. Aftab, H. Choi, D.W. Kim, "Computational fiducial using G and C vector polynomials for alignment of deflectometry system," Optics Letters (2021).
6. H. Quach , H. Kang, S. Sirsi, A. Chandra, H. Choi, M. Esparza, K. Karrfalt, J. Berkson, Y. Takashima, A. Palisoc, J.W. Arenberg, C. Walker, C. d'Aubigny, D.W. Kim, "Surface Measurement of a Large Inflatable Reflector in Cryogenic Vacuum," Photonics (2021). [Front Page Article of Photonics, February 2022]
7. H. Quach, H. Kang, B. Jeong, H. Choi, D. Kim, "Non-Planar Illumination Deflectometry for Axicon Metrology," Optics Letters (2022)
8. S. Ordones, J. Park, H. Quach, D. Kim, H. Choi, "Spatial-temporal phase demodulation decoding superimposed ghost reflections in optical testing," Optics Letters (2022)
9. S. Sirsi, H. Quach, H. Choi, D. Kim, Y. Takashima, C. Walker, "Modeling and Characterization of OASIS Inflatable Primary Antenna by Dual Modality Metrology," Optics Express (September 2022)
10. B. Jeong, S. Ordones, H. Quach, D. Kim, H. Choi, "Digital filtering of ghost signal in phase measuring deflectometry," Optics Letters (2023). [Optica Editor's Pick, March 2023]
11. J. Berkson, J. Hyatt, H. Kang, S. Ordones, H. Quach, D. Kim, "Binocular fringe projection profilometry for the metrology of meter-scale optical surfaces" Optics Continuum (March 2023)
Conference Proceedings
1. D.W. Kim, M. Aftab, I. Trumper, L.R. Graves, H. Quach, H. Kang, X. Guo, and H. Choi, "Programmatic Large Precision Optics Manufacturing," International Conference on Optics and Electro-Optics (2019).
2. D.W. Kim, M. Aftab, I. Trumper, L.R. Graves, H.Quach, H. Kang, H. Yoo, A. Lowman, G. Smith, M. Dubin, C.J. Oh, J. Hyatt, C. Davila-Peralta, H.J. Choi "Reconfigurable dynamic optical system design, test, and data analysis," SPIE Photonics Europe 11352 (2020).
3. H. Quach, L.R. Graves, H. Kang, D.W. Kim "Electrically-Modulated optoelectronics-based infrared source enabling ground surface precision deflectometry," Advances in Optoelectronic Technology and Industry Development (2020).
4. D.W. Kim, C.K. Walker, D. Apai, T.D. Milster, Y. Takashima, R. Liang, et al., "Disruptive space telescope concepts, designs, and developments: OASIS and Nautilus," EOSAM Frontiers in Optical Metrology (2020).
5. H. Quach, J. Berkson, S. Sirsi, H. Choi, R. Dominguez, B. Duffy, D. Lesser, Y. Takashima, A. Palisoc, C. Walker, D.W. Kim., "Full-Aperture Optical Metrology for Inflatable Membrane Mirrors," Optical Manufacturing and Testing XIII (2020).
6. H. Quach, H. Kang, H. Choi, D.W. Kim, "Non-Planar Illumination Sources for Deflectometry," Optical Manufacturing and Testing XIII (2020).
7. H. Kang, H. Quach, H. Choi, G. Smith, D.W. Kim, "Computational alignment of on-machine deflectometry," Optical Manufacturing and Testing XIII (2020).
8. D.W. Kim, M. Esparza, H. Quach, S. Rodriguez, H. Kang, Y. Feng, and H. Choi, "Optical Technology for Future Telescopes," International Conference on Photonics and Optical Engineering (2020).
9. J. Berkson, Z. Hatfield, A. St. Peter, H. Quach "Meter-Class Infrared Deflectometry for Visibly Non-Specular Surface Metrology," OSA Optical Design and Fabrication Congress (2021).
10. H. Quach, M. Esparza, et al. "Deflectometry-Based Thermal Vacuum Testing for a Pneumatic Terahertz Antenna," Astronomical Optics, Design, Manufacturing, and Test of Space and Ground Systems III. (2021)
11. A. Palosic et al. "Analytical and finite element analysis tool for nonlinear membrane antenna modeling for astronomical applications," Astronomical Optics, Design, Manufacturing, and Test of Space and Ground Systems III. (2021)
12. M. Esparza et al. "Stressed Deformable Reflector and Pneumatic Membrane Antenna for Thermal Vacuum Terahertz Wavefront Control and Measurement," Astronomical Optics, Design, Manufacturing, and Test of Space and Ground Systems III. (2021)
13. D. Kim et al. "Inflatable Space Terahertz Optics Technology," Frontiers in Optics & Photonics. (2021)
14. S. Sirsi et al. "Orbhttps://opg.optica.org/ol/abstract.cfm?uri=ol-48-7-1642byeongiting Astronomical Satellite for Investigating Stellar Systems (OASIS): A Paradigm Shift in Realizing Large Space Telescopes," Space Telescopes and Instrumentation: Optical, Infrared, and Millimeter Wave. (2022)
15. H. Quach, et al. “Influence of Lens and Perspective Distortion on Optical Surface Metrology Instrumentation," Optical Manufacturing and Testing XIV. (2022)
16. H. Choi, H. Kang, Y. Huang, M. Yoo, H. Quach, J. Kam, D. Kim “Advanced deflectometry methods for industrial application ," Industrial Optical Devices and Systems. (2023)
Experience
ASML, EUV Plasma Metrology
Feb 2023 - PresentSenior Optical Sensing Engineer
EUV optical diagnostic module owner. Responsible for technical development, module integration and testing, industrialization, and handling field escalations for optical diagnostic laser + camera hardware.
LOFT Research Group
Aug 2018 - December 2022Graduate Research Assistant
I worked on a variety of metrology techniques to measure highly challenging specular surfaces, such as convex mirrors and freeform optics. For the past two years, I have been developing advancements to a method called deflectometry, which measures highly sloped optics to nanometers with just a regular machine vision camera, an LCD display, and precision equipment to calibrate those tools. My research advanced the accuracy of the art and the variety of measurable surfaces.
Leaning on my strengths, I supported my labmates with help in optical system analysis, optomechanical design, illumination, and rapid prototyping. Conversely, I have leaned on them for other specialized areas such as lens design, aberration theory, and optical fabrication. It has been a happy existence in a productive, mutually-reinforcing environment.
Nikon Research Corporation of America
May 2022 - Aug 2022Optical Scientist Intern
At Nikon Research, I worked with principal optical engineers and scientists towards the development of advanced optical architectures. On a given week, I applied optical design, geometrical optics, radiometric calibration, and image processing for optical system prototypes and their analysis. This work included plenty of high-powered lasers, high-speed cameras, lens design, and creative technical ideation.
Lawrence Livermore National Laboratory
May 2021 - Aug 2021Graduate Optical Engineering Intern
In Summer 2021, I was an optical engineering intern in LLNL’s LSEO (Laser Systems Engineering and Operations) division. My two amazing mentors that virtual summer were Dr. Sid Patankar from Laser Diagnostics and Dr. Stacie Manuel from the Optical Design Group. All of my time was spent on OTSL, or the Optical Thomson Scattering Laser, a gigawatt class deep UV laser (5
Most notably, I used FRED to conduct stray light analysis on OTSL. This subassembly included around 34 surfaces with prisms, mirrors, lenses, beamsplitters, blast windows, and a scattering aluminum chassis. I managed optical model geometries, coatings, baffles, and considered ghosts from multiple wavelength sources – at the target wavelength (5
One of my best moments all summer was hearing that one of my simulated ghost families was a dead-on match with a previously unidentified experimental artifact observed by the OTSL alignment team. At the end of summer, my presentation 'Fantastic Ghosts and Where to Find Them' won the LSEO Division Summer Slam, won the Engineering Directorate Summer Slam, and was presented to a broad technical audience as one of several overall winners of the Lawrence Livermore National Lab's Summer Slam, 2021.
Intuitive Surgical
May 2017 - July 2018Mechanical Engineer
At Intuitive, I worked as a mechanical engineer on a variety of tasks for the instruments group. I designed, assembled, tested, and deployed a huge range of jigs, fixtures, and tooling to support processes engineering and testing for the da Vinci Xi Stapler, Suction Irrigator, and standard monopolar cutting instruments. I worked with suppliers, supplier engineers, project managers, manufacturing engineers, QA, machinists, and technicians alike to develop and maintain production of the product. My experience at Intuitive gave me a strong grasp of root-cause analysis, as well as a sense of how medium-volume manufacturing of complex electromechanical products is successfully accomplished. Shown above are two good friends who worked at Intuitive at the time, Emily and Vatsal, as well as Intuitive's CEO, Gary!
Duke Innovation Studio
Aug. 2016 - May 2017Studio Staff
During my senior year, I worked at Duke University's formal makerspace, called the Innovation Colab. My job was to talk to whoever came into our space and teach them how to make the things they wanted to make! I taught students (and professors!) how to use our 3D printers, CNCs, and laser cutters. I also tutored SolidWorks, Arduino, and web design. We were unofficially involved with many senior designs, engineering club projects, and a surprising number of gifts for long-distance relationships. The photo above was taken right before many of us graduated - Lucia, Mitch, Addison, Varun, Vinny, Grant, Chip, Ross, and Jenna. (We are missing Kris here :'( )
Intuitive Surgical
May 2016 - Aug. 2016Advanced Product Development Intern
My first summer with Intuitive was spent on the Advanced Product Development (ADP) team, an R&D group working on a variety of cool robotics projects. Of the topics I can discuss, I designed automated precision assemblies that required the design of kinematic couplings. There, I modeled assemblies in SolidWorks, applied DFMA principles, completed machined parts drawings, conducted FEA studies, and held design reviews for new processes. I was really grateful to be taken under the wing of such incredible and kind people. My experience here was what pushed me take my first optics class ever and what eventually motivated me to apply for a Ph.D. in Optics. The APD interns (great friends and pranksters!) in the summer of 2016 included Natalie, Tae, myself, and Ehsan.
Oceaneering Space Systems
May 2015 - Aug. 2015Spacesuit Engineering Intern
In the summer of 2015, I moved to Houston for 3 months to work on the Constellation Space Suit contracted by Oceaneering Space Systems. My primary assignment was to assist my mentor, Tammy, for her design of the suit controller assembly (SCA) for NASA's next generation space suit. I wrote readiness reviews, test procedures, and trade studies for mil-spec components for the SCA. Also, I used UI/UX software to revise controller menuing for intuitive usage, human-centered design, and organization of critical mission data. I was able to get an astronaut (Carl Walz) to use it and he gave me his feedback on my design! Preceding that fall's critical design review by NASA, a few of us (Sara, Kylar, myself, and Eric) were able to try on the actual spacesuit we were working on! We fondly recollect our group photos in these suits as "space prom".
Duke Shared Materials Instrumentation Facility
Aug 2014 - Feb 2015Cleanroom Lab Assistant
Pennsylvania Department of Transportation
May 2014 - Aug. 2014Civil Engineering Intern
Duke Talent Identification Program
Aug 2014 - Feb 2015Office Assistant
University of Arizona
M.S/Ph.D. in Optical Sciences
ARCS Foundation Scholar, Phoenix Chapter '22-'23; LLNL Summer Slam Winner '21
Member: OSA, SPIE, and ASPE
Duke University
BS in Mechanical Engineering
Boeing Grand Challenges Fellow '16-'17
2013 - 2017Garden Grove High School
Valedictorian; Most Worthy Argonaut
2009 - 2013Projects
- All
- Optics
- Mechanical Design
- Mechatronics
- Misc.
Reading List
Currently Reading
- On Writing, by Stephen King
- This is how you lose the time war, by Amal El-Mohtar and Max Gladstone
- When McKinsey Comes to Town, byMichael Forsyth and Walt Bogdanich
2024
- Palo Alto, by Malcolm Harris
- Go! by Kazuki Kaneshiro
- Filterworld: How Algorithms Flattened Culture, by Kyle Chayka
- Reminiscences of the VLSI Revolution, by Lynn Conway
- Why We Read: On Bookworms, Libraries, and Just One More Page Before Lights Out, by Shannon Reed
- Babel, by R.F. Kuang
- Koreatown Dreaming: Stories and Portraits of Korean Immigrant Life, by Emanuel Hahn
- Pollution Is Colonialism, by Max Liboiron
- The Science of Beauty, by Michelle Wong
- The Family Chao, by Lan Samantha Chang
- Open Circuits: The Inner Beauty of Electronic Component, by Eric Schlaepfer and Windell Oskay
- Permission to Come Home, by Jenny T. Wang
- Poetry of Presence, edited by Phyllis Cole-Dai and Ruby R. Wilson
- The Manicurist's Daughter, by Susan Lieu
- Stories of Your Life and Others, by Ted Chiang
2023
- Dream Hoarders, by Richard Reeves
- Mistborn: The Final Empire, by Brandon Sanderson
- Mistborn: The Well of Ascension, by Brandon Sanderson
- Mistborn: The Hero of Ages, by Brandon Sanderson
- Mistborn: The Alloy of Law, by Brandon Sanderson
- Room Service, by Ron Carlson
- All the Beauty in the World, by Patrick Bringley
- The Remains of the Day, by Kazuo Ishiguro
- Red Rising, by Pierce Brown
- Golden Sun, by Pierce Brown
- Morning Star, by Pierce Brown
- Four Thousand Weeks, by Oliver Burkeman
- Radically Condensed Instructions for Being Just as You Are, by J. Jennifer Matthews
- Clarity and Connection, by Yung Pablo
- The Wisdom of Insecurity, by Alan Watts
- Never Let Me Go, by Kazuo Ishiguro
- My Life Growing Up Asian in America, by CAPE (Coalition of Asian Pacifics in Entertainment)
- The Course of Love, by Alain de Botton
- The Book, by Alan Watts
- I Want to Die But I Want to Eat Tteokbokki: A Memoir, by Baek Se-hee
- Kids These Days, by Malcolm Harris
- Reclaiming Life from Work, by Simone Stolzoff
- Chip War: The Fight for the World's Most Critical Technology, by Chris Miller
- Inward, by Yung Pueblo
2022
- The Picture of Dorian Gray, by Oscar Wilde
- The Essential Neruda: Selected Poems, by Pablo Neruda and edited by Mark Eisner
- Book of Twilight, by Pablo Neruda and translated by William O'Daly
- Braiding Sweetgrass, by Robin Wall Kimmerer
- The Price We Pay: What Broke American Health Care, by Marty Makary
- Foreverland: The Divine Tedium, by Heather Havrilesky
- West with the Night, by Beryl Markham
- Night Sky with Exit Wounds, by Ocean Vuong
- With Stars in Their Eyes: The Extraordinary Lives and Enduring Genius of Aden and Marjorie Meinel, by James Breckinridge and Alec Pridgeon
- The Sympathizer, by Viet Thanh Nguyen
- Time is a Mother, by Ocean Vuong
- Black Market: An Insider's Journey into the High-Stakes World of College Basketball, by Merl Code
- Portrait of a Thief: A Novel, by Grace Li
- Games: Agency as Art, by C. Thi Nguyen
- Polarized Light in Nature, by G.P. Können
- Machine See, Machine Do: How Technology Mirrors Bias in Our Criminal Justice System, by Patrick Lin
- Breasts and Eggs, by Mieko Kawakami
- I'm Glad My Mom Died, by Jennette McCurdy
- A History of the Photographic Lens, by Rudolf Kingslake
- The Emperor's Soul, by Brandon Sanderson
- Sixth of the Dusk, by Brandon Sanderson
- Existential Physics, by Sabine Hossenfelder
- The Varieties of Scientific Experience, by Carl Sagan
2021
- Storyworthy, by Matthew Dicks
- The Count of Monte Cristo, Unabridged, by Alexandre Dumas, translation by Robin Buss
- The Carrier Bag Theory of Fiction, by Ursula Le Guin
- The Hobbit, by J.R.R. Tolkien
- The Making of Asian America: A History, by Erika Lee
- A Promised Land, by Barack Obama
- Big Fat Surprise, by Nina Teicholz
- The Body: A Guide for Occupants, by Bill Bryson
- The Death of Ivan Ilych, by Leo Tolstoy
- How We Die: Reflections on Life's Final Chapters, by Sherwin B. Nuland
- Goodbye, Again, by Johnny Sun
- HTWF&IP, by Dale Carnegie
- Everyone's a Aliebn When Ur a Aliebn Too, by Johnny Sun
- Designing Your Life, by Bill Burnett and Dave Evans
- Lost in Math: How Beauty Leads Physics Astray, by Sabine Hossenfelder
- Becoming, by Michelle Obama
- Kandinsky, by Hajo Düchting
- Work: A Deep History, from the Stone Age to the Age of Robots, by James Suzman
- The Trouble with Physics: The Rise of String Theory, the Fall of a Science, and What Comes Next, by Lee Smolin
- Pale Blue Dot: A Vision of the Human Future in Space, by Carl Sagan
- Billions and Billions: Thoughts on Life and Death at the Brink of the Millennium, by Carl Sagan
- Perspectives on Modern Optics and Imaging, by Ronian Siew
- Crying in H Mart, by Michelle Zauner
2020
- An American Illness, by Elizabeth Rosenthal
- The Righteous Mind: Why Good People are Divided by Politics and Religion, by Jonathan Haidt
- The New Jim Crow, by Michelle Alexander
- Out of the Woods, by Julia Corbett
- Excellent Sheep, by William Deresiewicz
- The War on Normal People, by Andrew Yang
- The Hardware Hacker, by Andrew "bunnie" Huang
- The Myth of Sisyphus, by Albert Camus
- Dune, by Frank Hebert
- Lolita, by Vladimir Nabakov
- An Edge in the Kitchen, by Chad Ward
- Computer-Aided Lens Design, by Gregory Hallock Smith
- The Pho Cookbook, by Andrea Nguyen
- Minor Feelings, by Cathy Park Hong
- Algorithms to Live By: The Computer Science of Human Decisions, by Brian Christian
- A Life on Our Planet: My Witness Statement and a Vision for the Future, by David Attenborough
- Never Split the Difference, by Chris Voss and Tahl Raz
- Pale Fire, by Vladimir Nabakov
2019
- On Earth, We're Briefly Gorgeous, by Ocean Vuong
- Principles for Work and Life, by Ray Dalio
- Bad Blood, by John Carreyrou
- How Will You Measure Your Life? by Clayton M. Christensen
- What a Fish Knows
- Norse Mythology, by Neil Gaiman
- How to Be A Person in the World, by Heather Havrilesky
- What if This Were Enough? by Heather Havrilesky
- Storytelling with Data, by Cole Nussbaumer Knaflic
- Thinking in Bets, by Annie Duke
All-Time Favorites
- Principles for Work and Life, by Ray Dalio
- What if This Were Enough? by Heather Havrilesky
- How Will You Measure Your Life? by Clayton M. Christensen
- The Annotated Mona Lisa, by John Boswell
Archived
- The Optics of Life, by Sonke Johnsen
- Pnin, by Vladimir Nabakov
- Gig: Americans Talk About Their Jobs, edited by John Bowe
- The Art of the Personal Essay, edited by Phillip Lopate
- Because Internet: Understanding the New Rules of Language, by Gretchen McCulloch