Henry Quach
Welcome! I’m an optical systems engineer at ASML, working on precision sensing systems for EUV lithography. My background spans optical design, illumination, stray light, and optomechanical engineering. This homepage is a working notebook for the things I build, study, and occasionally overthink.
This site is part portfolio, part night-sky optical instrument. Here’s the map:
- PROJECTS~50 builds and studies, filterable by domain
- EXPERIENCEcareer history and education
- PUBLICATIONSpeer-reviewed papers and proceedings
- READINGbooks on my desk right now
- ABOUTwho I am outside the lab
- The sky represents real stars from the Bright Star Catalogue, placed and colored by their catalog data.
- The turret below swaps instruments — eyepiece, grism, and wavefront sensor. Each one changes what the sky shows you.
- Each tab exposes a different flavor of the night sky.
- Press the '~' key for meteor shower mode.
Experience
VIEW RESUMÉ (PDF) →Projects
// the full catalog — filter the catalog
Publications
Reading
// each year forms its own asterism — favorites trace the figure · color marks genre
About Me
// talk to me about optics, baking, or both!
I earned my B.S. in Mechanical Engineering from Duke University and my Ph.D. in Optical Sciences from the University of Arizona. Today, I develop and industrialize optical sensing systems for advanced semiconductor equipment, bringing together optics, plasma physics, and control algorithms.
Outside of work, I enjoy photography, hiking, stargazing, and baking with gratuitous amounts of butter. Recently, my blueberry pie won third place in the double-crust pie division at the San Diego County Fair. I’m endlessly curious about how other people see and make sense of the world, and love hearing others talk about their craft.