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Phase Only Pupil Filter Design Using Zernike Polynomials
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 Title & Authors
Phase Only Pupil Filter Design Using Zernike Polynomials
Liu, Jiang; Miao, Erlong; Sui, Yongxin; Yang, Huaijiang;
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A pupil filter is a useful technique for modifying the light intensity distribution near the focus of an optical system to realize depth of field (DOF) extension and superresolution. In this paper, we proposed a new design of the phase only pupil filter by using Zernike polynomials. The effect of design parameters of the new filters on DOF extension and superresolution are discussed, such as defocus Strehl ratio (S.R.), superresolution factor (G) and relative first side lobe intensity (M). In comparison with the other two types of pupil filters, the proposed filter presents its advantages on controlling both the axial and radial light intensity distribution. Finally, defocused imaging simulations are carried out to further demonstrate the effectiveness and superiority of the proposed pupil filter on DOF extension and superresolution in an optical imaging system.
Wavefront coding;Non-integer phase mask;Depth of field;Imaging system;
 Cited by
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