Author

Daewook Kim

5 papers indexed here

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Open access Oct 2026

The Lazuli Space Observatory: Architecture and Capabilities

The Lazuli Space Observatory is a 3 m aperture astronomical facility designed for rapid-response observations and precision astrophysics across visible to near-IR wavelengths (400–1700 nm bandpass). An off-axis, freeform telescope delivers diffraction-limited image quality (Strehl >0.8 at 633 nm) to three instruments a...

Arpita Roy, Stuart Feldman, Peter Klupar et al. · Astrophysical Journal · 1 citation

Oct 2026

Adaptive local-minimum escape strategies for SPGD-based space telescope alignment

Stochastic Parallel Gradient Descent (SPGD) is widely used for model-free optical alignment because it produces an implicit descent signal when no explicit gradient is available. We use SPGD in the third of four sequential stages (blind-scan, model-based fit, SPGD, focus-diverse phase retrieval) of the commissioning pi...

Ryan Luu, Solvay A. Blomquist, Heejoo Choi et al. · Optical Manufacturing and Te... · 0 citations

Jul 2026

Testing of machine learning wavefront sensing algorithms on the Tiny Observatory for Telescope Optimization (TOTO) testbed

This work considers a Machine Learning model trained originally on simulated data, and then augmented with real focus diversity data from the Tiny Observatory for Telescope Optimization (TOTO) testbed at the University of Arizona, and compares the wavefront sensing performance of the Machine Learning model with known t...

Sanchit Sabhlok, Solvay A. Blomquist, M. Kautz et al. · Astronomical Telescopes + In... · 1 citation

Oct 2026

Upgraded optical design of a multi-band long-slit far-UV spectroscopic payload for high-resolution detection of diffuse galactic emission

Ardua is a mission concept proposed for NASA’s ASTRA Initiative and submitted to COPAG and PhysPAG, combining Far-UV (FUV) and X-ray instruments to investigate the baryon cycle connecting stars to the cosmic web through observations of the circumgalactic medium (CGM). This proceeding focuses on the preliminary optical...

Changgone Kim, Pierre R. Nicolas, Haeun Chung et al. · Optical Modeling and Perform... · 0 citations

Preprint Jul 2026

Testing of machine learning wavefront sensing algorithms on the Tiny Observatory for Telescope Optimization (TOTO) testbed

Phase retrieval techniques are utilized to correct low order wavefront aberrations originating from misalignments of the optical system in space based telescope concepts. Traditional phase retrieval involves observation of the Point Spread Function (PSF) and a diversity measurement, usually focus diversity although oth...

Sanchit Sabhlok, Solvay A. Blomquist, Y. Maggie et al. · 0 citations