Edge effects on the diffraction of the segmented aperture

Bi-ru Wang; Ji-xiang Yan; Xiao-fang Zhang; Yuan-shen Gu

doi:10.1117/12.790852

19 February 2008 Edge effects on the diffraction of the segmented aperture

Bi-ru Wang, Ji-xiang Yan, Xiao-fang Zhang, Yuan-shen Gu

Author Affiliations +

Proceedings Volume 6625, International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications; 66250S (2008) https://doi.org/10.1117/12.790852
Event: International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, 2007, Beijing, China

Abstract

At present, the large telescopes use segmented primary mirror. Segmentation and edge effects are closely related to system image quality. Generally there are four kinds of edge effects including gaps between segments, turned down/up segment edges, piston and random tip-tilt errors. This paper concentrates on a primary mirror structure with a central octagonal segment and eight marginal approximately annular-sector segments. We will give a Strehl Ratio formula that contains edge effect parameters. In addition, both the derivation and simulation are based on the assumption that edge effects exist uniquely.

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Bi-ru Wang, Ji-xiang Yan, Xiao-fang Zhang, and Yuan-shen Gu "Edge effects on the diffraction of the segmented aperture", Proc. SPIE 6625, International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications, 66250S (19 February 2008); https://doi.org/10.1117/12.790852

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