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Proceedings Paper

Integration, alignment, and verification of optical system assembly for FORMOSAT-5
Author(s): Ching-Wei Chen; Po-Hsuan Huang; Chia-Ray Chen; Chia-Yen Chan; Chun-Chieh Lien; Po-Han Huang; Ming-Ying Hsu; Shenq-Tsong Chang; Ting-Ming Huang
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Paper Abstract

FORMOSAT-5 consists of a spacecraft bus and an electro-optical payload. The payload is an f/8 Cassegrain type telescope with 3.6-m effective focal length. The spacecraft has a ground sampling distance of 2-m for panchromatic and 4-m for multispectral bands, with a 24-km swath width. FORMOSAT-5 is the first space program that National Space Organization (NSPO) takes full responsibility for the complete satellite and payload system engineering. The optical system assembly (OSA) has been successfully aligned and is now undergoing final performance verification tests at system level. To help create this unique instrument, NSPO has developed the computer aided alignment method assisted with the mechanical ground support equipment to carry out the assembly, alignment, and verification of the complex systems. This method offers an integrated capability for interferometric alignment and characterization of the large instrument. A detail OSA integration and verification steps, including primary mirror, secondary mirror, corrector lens and baffles alignment are presented. This paper describes the overall capability of this method and uses decomposed Zernike polynomials from the alignment and characterization of the OSA to verify the reduction of the wavefront errors and misalignments. It further demonstrates the successful completion of the instrument and satisfaction with the main system requirements.

Paper Details

Date Published: 8 September 2014
PDF: 14 pages
Proc. SPIE 9195, Optical System Alignment, Tolerancing, and Verification VIII, 91950H (8 September 2014); doi: 10.1117/12.2060604
Show Author Affiliations
Ching-Wei Chen, National Space Organization (Taiwan)
Po-Hsuan Huang, National Space Organization (Taiwan)
Chia-Ray Chen, National Space Organization (Taiwan)
Chia-Yen Chan, Instrument Technology Research Ctr. (Taiwan)
Chun-Chieh Lien, Instrument Technology Research Ctr. (Taiwan)
Po-Han Huang, Instrument Technology Research Ctr. (Taiwan)
Ming-Ying Hsu, Instrument Technology Research Ctr. (Taiwan)
Shenq-Tsong Chang, Instrument Technology Research Ctr. (Taiwan)
Ting-Ming Huang, Instrument Technology Research Ctr. (Taiwan)

Published in SPIE Proceedings Vol. 9195:
Optical System Alignment, Tolerancing, and Verification VIII
José Sasián; Richard N. Youngworth, Editor(s)

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