9 papers
Testing of machine learning wavefront sensing algorithms on the Tiny Observatory for Telescope Optimization (TOTO) testbed
Sanchit Sabhlok, Solvay A. Blomquist, Maggie Y +16
Phase retrieval techniques are utilized to correct low order wavefront aberrations originating from misalignments of the optical system in space based telescope concepts. Tradition…
Tiny Observatory for Telescope Optimization (TOTO): testing algorithms for autonomous on-orbit alignment for space-based telescope systems
Solvay A. Blomquist, Sanchit Sabhlok, Hyukmo Kang +11
The Tiny Observatory for Telescope Optimization (TOTO) is an optical testbed designed to evaluate the efficacy of autonomously driven alignment algorithms for space-based telescope…
Cascade adaptive optics with a second stage based on a Zernike wavefront sensor for exoplanet observations II. Validation in broadband light on the ESO/GHOST testbed
A. Rahim, M. N'Diaye, A. Vigan +10
Current high-contrast facilities on the ground use extreme adaptive optics (XAO) systems to achieve contrasts down to at 200\,mas for exoplanet observations. This perform…
Low Thrust Electric Propulsion Mission Concepts For a 3-Meter Class Space Telescope
Yael M. Brynjegard-Bialik, Mohamed Nassif, Drew Latta +12
Space-based telescopes benefit from operating in stable orbital environments with reduced exposure to radiation and thermal fluctuations in order to minimize cost and maximize time…
The Lazuli Space Observatory: Architecture & Capabilities
Arpita Roy, Stuart Feldman, Pete Klupar +51
The Lazuli Space Observatory is a 3-meter aperture astronomical facility designed for rapid-response observations and precision astrophysics across visible to near-infrared wavelen…
Stray and Scattered Light Considerations in a Non-contiguous Array of Commercial CMOS Sensors in a Space Mission
Maggie Y. Kautz, Douglas Kelly, Heejoo Choi +6
Recent advances in CMOS technology have potential to significantly increase the performance, at low-cost, of an astronomical space telescope. Arrays of sensors in space missions ar…
Stages of commissioning alignment for three-mirror anastigmat (TMA) telescopes
Solvay Blomquist, Heejoo Choi, Hyukmo Kang +7
Reliable, autonomously, deployment of telescopes enables a wide range of possible science cases. In this paper, we present a method for multi-stage telescope alignment with a simpl…
Focus diverse phase retrieval test results on broadband continuous wavefront sensing in space telescope applications
Hyukmo Kang, Kyle Van Gorkom, Meghdoot Biswas +2
Continuous wavefront sensing benefits space observatories in on-orbit optical performance maintenance. To measure the phase of a wavefront, phase retrieval is an attractive techniq…
Alignment of three mirror anastigmat telescopes using a multilayered stochastic parallel gradient descent algorithm
Solvay Blomquist, Heejoo Choi, Hyukmo Kang +4
When a telescope doesn't reach a reasonable point spread function on the detector or detectable wavefront quality after initial assembly, a coarse phase alignment on-sky is crucial…