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Optical Engineering • new

Improved multiple circular array configuration for sparse aperture optical imaging systems
Author(s): Aimin Liu; Limin Gao; Maosen Xiao
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Paper Abstract

An improved multiple circular array (MCA) configuration is proposed for sparse aperture (SA) optical imaging systems. Using genetic algorithms, the practical cutoff frequency (PCOF), based on the modulation transfer function for the array, is selected as the fitness function. Moreover, the parameters, such as diameters of aperture sets, spacing between the aperture sets, and relative rotation angles between aperture sets on different concentric circles, are calculated. Improved MCA configurations, with aperture numbers of 6, 9, 12, 10, 15, 11, and 13, are given. Golay arrays, MCAs, a single annular aperture, and improved arrays with the same fill factor are compared. The results show that the improved array has highest PCOF of all the SA arrays, smoother coverage in Fourier space, and better midfrequency contrast than MCAs. Consequently, the improved array is a promising aperture configuration that can approximate a single annular aperture.

Paper Details

Date Published: 27 July 2017
PDF: 8 pages
Opt. Eng. 56(7) 073109 doi: 10.1117/1.OE.56.7.073109
Published in: Optical Engineering Volume 56, Issue 7
Show Author Affiliations
Aimin Liu, Xi'an Institute of Optics and Precision Mechanics, CAS (China)
Limin Gao, Xi'an Institute of Optics and Precision Mechanics, CAS (China)
Maosen Xiao, Xi'an Institute of Optics and Precision Mechanics, CAS (China)


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