Edge effects on the diffraction of the segmented aperture

Details Edge effects on the diffraction of the segmented aperture Edge effects on the diffraction of the segmented aperture

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008spie.6625e..27w&link_type=abstract

International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications. Edited by Zhou, L

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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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