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Publications & Research

My contributions to the scientific community spanning optical science, machine learning, and interdisciplinary research.

On-orbit coarse alignment of three mirror anastigmat telescopes utilizing blind scanning and stochastic processes
Solvay A. Blomquist, Heejoo Choi, Hyukmo Kang, Ryan Luu, Kevin Z. Derby, Pierre Nicolas, Patrick Ingraham, Daewook Kim · Journal of Astronomical Telescopes, Instruments, and Systems 12(3), 039003 (2026)
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Adaptive local-minimum escape strategies for stochastic parallel gradient descent in space telescope optical alignment
Ryan Luu, Solvay Blomquist, Heejoo Choi, Hayden Kim, Pierre Nicolas, Casey Scoggins, Hyukmo Kang, Kevin Derby, Ewan S. Douglas, Daewook Kim · Proc. SPIE 14215-39, Optical Manufacturing and Testing (2026)
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Bessel-beam-based hybrid physics-informed phase retrieval from single-shot measurements
Zhaowei Chen, Ryan Luu, Robert E. Parks, Surya P. Gurunarayanan, Daewook Kim · Proc. SPIE 14215-26, Optical Manufacturing and Testing (2026)
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Pressure gradient formation in orbital polishing
Vipender S. Negi, Hubert M. Martin, Hyukmo Kang, Ryan Luu, Xiangyu Guo, Tianyi Wang, Xiaolong Ke, Lei Huang, Heejoo Choi, Mourad Idir, Daewook Kim · Proc. SPIE 14215-7, Optical Manufacturing and Testing (2026)
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Determining a methodology for inner baffle vane placement through stray light analysis of a biased field three-mirror-anastigmat space telescope
Casey Scoggins, Justin Schneider, Changgon Kim, Joanna Rosenbluth, Ryan Luu, Neha M. Sunil, Daewook Kim, Heejoo Choi · Proc. SPIE 14215-31, Optical Manufacturing and Testing (2026)
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In situ ion beam profile characterization for the upgraded ion beam figuring system at NSLS-II
Jinxu Zhu, Tianyi Wang, Lei Huang, Andrew Selzman, Mourad Idir, Ryan Luu, Mihir Tare · Proc. SPIE 14215-10, Optical Manufacturing and Testing (2026)
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CUDO: closed-form universal dwell-time optimization for computer-controlled optical surfacing
Tianyi Wang, Lei Huang, Xiaolong Ke, Yingnan Ma, Yiming Zhang, Ryan Luu, Vipender Negi, Corey Austin, Heejoo Choi, Hyukmo Kang, Daewook Kim, Mourad Idir · Optics Express 33(24), 50201 (2025)
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Unified closed-form framework for dwell time optimization in precision optical figuring
Tianyi Wang, Lei Huang, Xiaolong Ke, Yingnan Ma, Ryan Luu, Vipender Negi, Corey Austin, Heejoo Choi, Hyukmo Kang, Daewook Kim, Mourad Idir · Proc. SPIE 13728-52, Advances in Optical Fabrication, Testing, and Metrology (2025)
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Optimizing dwell time matrix computations: a GPU-accelerated approach for CCOS
Ryan Luu, Tianyi Wang, Vipender S. Negi, Heejoo Choi, Hyukmo Kang, Xiangyu Guo, Xiaolong Ke, Lei Huang, Corey Austin, Mourad Idir, Daewook Kim · Proc. SPIE 13624-86, Astronomical Applications (2025)
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Parallel dwell time optimization in zonal optics fabrication for large mirror polishing
Vipender S. Negi, Ryan Luu, Tianyi Wang, Hyukmo Kang, Xiangyu Guo, Corey Austin, Xiaolong Ke, Heejoo Choi, Lei Huang, Mourad Idir, Daewook Kim · Proc. SPIE 13624-50, Astronomical Applications (2025)
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Polishing thin cordierite substrates using diamond particles and cerium oxide for high-precision optical applications
Vipender S. Negi, Hyukmo Kang, Ryan Luu, Mina Yoo, Xiangyu Guo, Tianyi Wang, Corey Austin, Xiaolong Ke, Heejoo Choi, Lei Huang, Manny Montoya, Mourad Idir, Daewook Kim · Proc. SPIE 13624-51, Astronomical Applications (2025)
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Progress towards alignment of Multi-Order Diffractive Engineered (MODE) lens segments using the Kinematically-Engaged Yoke System (KEYS) for optical performance testing
Marcos A. Esparza, Ryan Luu, Heejoo Choi, Tom D. Milster, Daniel Apai, Daewook Kim · Proc. SPIE 12221, Optical Manufacturing and Testing XIV (2022)
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Autonomous closed-loop control for multi-segmented optic aligning and assembly
Heejoo Choi, Marcos A. Esparza, Ryan Luu, Tom D. Milster, Daniel Apai, Daewook Kim · Proc. SPIE 12221, Optical Manufacturing and Testing XIV (2022)
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Multilateralism Shifts: A Study of Japanese Foreign Policy
Ryan Luu, Joshua Schlachet, Nathaniel Smith · W.A Franke Honors College Thesis Repository (2021)
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