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Proceedings Paper

Correcting of thermal and gravitational distortions of primary mirror on space camera by using adaptive optics
Author(s): Zhiwei Zhang; Xin Yu
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Paper Abstract

The paper describes the necessity of employing AO on space camera to overcome the thermal and gravitational influences in order to improve its image quality. Simulative computation of six cases are made to the thermal distortion of primary mirror of a typical Ritchey-Chretien space optical system by using finite element method. The P-V and RMS values, the Zernike coefficients of the mirror's surface are given. An AO correcting experiment system was designed and completed, both open-loop and close-loop experiments were made. A (Phi) 100 mm K9 glass reflective plane mirror was used as a proportional model of the primary mirror to simulate its thermal distortion. Three typical cases -- axial thermal gradient, radial gradient and the local thermal gradient were selected to simulate the on-orbit environment influences. This experiment results prove that AO can correct the low frequency thermal distortion of primary mirror on space camera and decrease the difficulty of temperature control of space optical system.

Paper Details

Date Published: 7 July 2000
PDF: 10 pages
Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); doi: 10.1117/12.390299
Show Author Affiliations
Zhiwei Zhang, Beijing Institute of Technology (China) and Beijing Institute of Space and Technology Info (China)
Xin Yu, Beijing Institute of Space and Technology Information (China)

Published in SPIE Proceedings Vol. 4007:
Adaptive Optical Systems Technology
Peter L. Wizinowich, Editor(s)

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