Statistics – Computation
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4007..200z&link_type=abstract
Proc. SPIE Vol. 4007, p. 200-209, Adaptive Optical Systems Technology, Peter L. Wizinowich; Ed.
Statistics
Computation
Scientific paper
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.
Yu Xin
Zhang Zhiwei
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