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Mirrors design, analysis and manufacturing of the 550mm Korsch telescope experimental model
Author(s): Po-Hsuan Huang; Yi-Kai Huang; Jer Ling
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Paper Abstract

In 2015, NSPO (National Space Organization) began to develop the sub-meter resolution optical remote sensing instrument of the next generation optical remote sensing satellite which follow-on to FORMOSAT-5. Upgraded from the Ritchey–Chrétien Cassegrain telescope optical system of FORMOSAT-5, the experimental optical system of the advanced optical remote sensing instrument was enhanced to an off-axis Korsch telescope optical system which consists of five mirrors. It contains: (1) M1: 550mm diameter aperture primary mirror, (2) M2: secondary mirror, (3) M3: off-axis tertiary mirror, (4) FM1 and FM2: two folding flat mirrors, for purpose of limiting the overall volume, reducing the mass, and providing a long focal length and excellent optical performance. By the end of 2015, we implemented several important techniques including optical system design, opto-mechanical design, FEM and multi-physics analysis and optimization system in order to do a preliminary study and begin to develop and design these large-size lightweight aspheric mirrors and flat mirrors. The lightweight mirror design and opto-mechanical interface design were completed in August 2016. We then manufactured and polished these experimental model mirrors in Taiwan; all five mirrors ware completed as spherical surfaces by the end of 2016. Aspheric figuring, assembling tests and optical alignment verification of these mirrors will be done with a Korsch telescope experimental structure model in 2018.

Paper Details

Date Published: 23 August 2017
PDF: 8 pages
Proc. SPIE 10371, Optomechanical Engineering 2017, 103710S (23 August 2017); doi: 10.1117/12.2273473
Show Author Affiliations
Po-Hsuan Huang, National Space Organization (Taiwan)
Yi-Kai Huang, National Space Organization (Taiwan)
Jer Ling, National Space Organization (Taiwan)


Published in SPIE Proceedings Vol. 10371:
Optomechanical Engineering 2017
Alson E. Hatheway; David M. Stubbs, Editor(s)

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