Design of wavefront coding optical system with annular aperture

Xinhua Chen; Jiankang Zhou; Weimin Shen

doi:10.1117/12.2246131

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19 October 2016 Design of wavefront coding optical system with annular aperture

Xinhua Chen, Jiankang Zhou, Weimin Shen

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Proceedings Volume 10155, Optical Measurement Technology and Instrumentation; 101551A (2016) https://doi.org/10.1117/12.2246131
Event: International Symposium on Optoelectronic Technology and Application 2016, 2016, Beijing, China

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.

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Xinhua Chen, Jiankang Zhou, and Weimin Shen "Design of wavefront coding optical system with annular aperture ", Proc. SPIE 10155, Optical Measurement Technology and Instrumentation, 101551A (19 October 2016); https://doi.org/10.1117/12.2246131

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