Analysis on the cophasing errors of optical sparse-aperture imaging system

Details Analysis on the cophasing errors of optical sparse-aperture imaging system Analysis on the cophasing errors of optical sparse-aperture imaging system

Jan 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007spie.6279e.112w&link_type=abstract

27th International Congress on High-Speed Photography and Photonics. Edited by Hou, Xun; Zhao, Wei; Yao, Baoli. Proceedings of

Computer Science

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Scientific paper

Optical sparse-aperture imaging system is one of the most potential techniques which can break through the physical limits to the diameter of conventional filled aperture telescope. The image from individual telescope not only should be overlapped, but also have the same phase at image plane. The purpose of this paper is to study the cophasing errors which would degrade the performance of sparse-aperture imaging system. The analysis and discussion on system errors which would lead to the cophasing error is presented, including piston error, tip/tilt error and pupil mapping error. The results of the numerical simulation are presented on the system which has two sub-systems and certain parameters. The effects of the piston error and tip/tilt error on the point spread function (PSF) of the system are discussed. The image degradation due to the piston and tip/tilt errors are shown based on the imaging system which has three subsystems.

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