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Wide viewing angle skewed effect of the point spread function in a wavefront coding system

机译：波前编码系统中点扩展函数的广视角偏斜效应

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摘要

The point spread function (PSF) of a wavefront coding (WFC) system with a cubic phase mask is analyzed with a wide viewing angle based on physical optics for what is believed to be the first time. Two coordinate transformations are made to generate a pupil function, from which we obtain the encoded PSF of the WFC system with defocus parameters W_(020) and object angles alpha and beta. The encoded PSFs are further side extended as the object angles get wider. When (alpha)(beta) < 0, the included angle PHI of encoded PSF will skew to an obtuse angle. When (alpha)(beta)(velence)0, PHI remains orthogonal; when (alpha)(beta) > 0, PHI will skew to an acute angle. Furthermore, the effect of skew and side extension is even symmetric about W_(020). As a result, the wide viewing angle has a bad effect on the imaging quality of the WFC system.
机译：首次使用基于物理光学的广视角分析具有立方相位掩模的波前编码（WFC）系统的点扩展函数（PSF）。进行两次坐标转换以生成光瞳函数，从中我们获得具有散焦参数W_（020）以及物角α和β的WFC系统的编码PSF。随着物镜角度变宽，编码的PSF会进一步扩展。当αβ＜0时，编码的PSF的夹角PHI将倾斜到钝角。当αβ（velence）0时，PHI保持正交;当αβ> 0时，PHI将倾斜到锐角。此外，偏斜和侧面延伸的影响甚至与W_（020）对称。结果，宽视角对WFC系统的成像质量有不良影响。

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