Performances of CAA Algorithms for Alignment State Estimation Simulations for Three-mirror Anastigmat Earth Observation Optical System

Title
Performances of CAA Algorithms for Alignment State Estimation Simulations for Three-mirror Anastigmat Earth Observation Optical System
Author(s)
강혁모; 오은송; 현상원; 김건희; 박영제; 김석환
KIOST Author(s)
Park, Young Je(박영제)
Publication Year
2014-10-29
Abstract
We report the performance study for several computer aided alignment algorithms for precision alignment state estimation of Three-Mirror Anastigmat(TMA) optical system that has been a popular choice for space optical cameras. They include sensitivity table method, merit function regression, differential wavefront sampling, and multiple design configuration optimization. First, we performed the sensitivity analysis and identified the tertiary mirror(M3) as the compensator. Its motion in two degrees of freedom(tilt X, tilt Y) are used to compensate the wavefront error because of the spherical mirror characteristic of M3. We simulated the alignment state estimation for the random misalignment to primary and secondary mirrors within the range of assembly tolerance(decenter X, Y: ±0.1mm, tilt X, Y: ±0.05 degree) while including hexapod alignment system error. The trial simulation result using merit function regression showed that we can meet the alignment requirement (1/15λ RMS wavefront error at 633nm) without iterations when random misalignments are not imposed to primary and secondary mirrors. The details of the computation, the results and implications are discussed.ensitivity table method, merit function regression, differential wavefront sampling, and multiple design configuration optimization. First, we performed the sensitivity analysis and identified the tertiary mirror(M3) as the compensator. Its motion in two degrees of freedom(tilt X, tilt Y) are used to compensate the wavefront error because of the spherical mirror characteristic of M3. We simulated the alignment state estimation for the random misalignment to primary and secondary mirrors within the range of assembly tolerance(decenter X, Y: ±0.1mm, tilt X, Y: ±0.05 degree) while including hexapod alignment system error. The trial simulation result using merit function regression showed that we can meet the alignment requirement (1/15λ RMS wavefront error at 633nm) without iterations when random misalignments are not imposed to primary and secondary mirrors. The details of the computation, the results and implications are discussed.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/25887
Bibliographic Citation
2014 가을 한국우주과학회, pp.61, 2014
Publisher
한국우주과학회
Type
Conference
Language
English
Publisher
한국우주과학회
Related Researcher
Research Interests

Ocean Color Remote Sensing,Satellite Applications,Ocean color Algorithm,해양원격탐사,위성활용,해색 알고리즘

Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse