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Proceedings Paper

Design of wavefront coding optical system with annular aperture
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Paper Abstract

Wavefront coding can extend the depth of field of traditional optical system by inserting a phase mask into the pupil plane. In this paper, the point spread function (PSF) of wavefront coding system with annular aperture are analyzed. Stationary phase method and fast Fourier transform (FFT) method are used to compute the diffraction integral respectively. The OTF invariance is analyzed for the annular aperture with cubic phase mask under different obscuration ratio. With these analysis results, a wavefront coding system using Maksutov-Cassegrain configuration is designed finally. It is an F/8.21 catadioptric system with annular aperture, and its focal length is 821mm. The strength of the cubic phase mask is optimized with user-defined operand in Zemax. The Wiener filtering algorithm is used to restore the images and the numerical simulation proves the validity of the design.

Paper Details

Date Published: 19 October 2016
PDF: 10 pages
Proc. SPIE 10155, Optical Measurement Technology and Instrumentation, 101551A (19 October 2016); doi: 10.1117/12.2246131
Show Author Affiliations
Xinhua Chen, Soochow Univ. (China)
Jiankang Zhou, Soochow Univ. (China)
Weimin Shen, Soochow Univ. (China)

Published in SPIE Proceedings Vol. 10155:
Optical Measurement Technology and Instrumentation
Sen Han; JiuBin Tan, Editor(s)

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