@inproceedings{66aa0404cd6f4bf8b015cbb80dabd53f,
title = "Low-to-mid spatial frequency wavefront error control for off-axis freeform three-mirror KASI-Deep Rolling Imaging Fast Telescope",
abstract = "We have developed the KASI-Deep Rolling Imaging Fast Telescope (K-DRIFT), adopting a 300 mm aperture off-axis freeform three-mirror design to detect faint and diffuse low-surface-brightness structures. By conducting the on-sky test observations and performing a series of simulations to analyze the performance of the K-DRIFT, we confirmed three main error sources causing optical performance degradation. The imaging performance of the K-DRIFT has successfully improved by correcting low-to-mid spatial frequency wavefront errors based on performance analysis results. This paper presents the K-DRIFT{\textquoteright}s optical performance analysis algorithm and the optical performance improvement.",
keywords = "freeform, K-DRIFT, mid-spatial frequency error, misalignment, off-axis, optical performance analysis, telescope, three-mirror system",
author = "Gayoung Lee and Yunjong Kim and Daewook Kim and Woowon Byun and Changsu Choi and Yongseok Lee and Dohoon Kim and Seunghyuk Chang and Jongwan Ko",
note = "Publisher Copyright: {\textcopyright} 2023 SPIE.; Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV 2023 ; Conference date: 21-08-2023 Through 24-08-2023",
year = "2023",
doi = "10.1117/12.2676309",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Hull, {Tony B.} and Daewook Kim and Pascal Hallibert",
booktitle = "Astronomical Optics",
}