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http://dx.doi.org/10.20910/JASE.2019.13.4.26

Fabrication and Performance Test of Small Satellite Camera with Focus Mechanism  

Hong, Dae Gi (Dept. of Aerospace and Mechanical Engineering, Graduate School at Korea Aerospace University)
Hwang, Jai Hyuk (Dept. of Aerospace and Mechanical Engineering, Korea Aerospace University)
Publication Information
Journal of Aerospace System Engineering / v.13, no.4, 2019 , pp. 26-36 More about this Journal
Abstract
The precise alignment between optical components is required in high-resolution earth observation satellites. However, the misalignment of optical components occurs due to external factors such as severe satellite launch environment and space environment. A satellite optical system with a focus mechanism is required to compensate for the image quality degraded by these misalignments. This study designed, fabricated, aligned precisely, and carried out a performance tests for the image quality of the system. The satellite optical camera performance tests were carried out to check the image quality change by operating the focus mechanism and to analyze the satellite optical system MTF by photographing USAF target using the autocollimator. According to the experimental results, the misalignments can be compensated sufficiently with the focus mechanism. Finally the basic data for re-focusing algorithm of the optical system was obtained through this study.
Keywords
Small Satellite; Focus Mechanism; Cassegrain; MTF; Edge Method;
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Times Cited By KSCI : 3  (Citation Analysis)
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