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Distributed wavefront coding for wide angle imaging system

机译：广角成像系统的分布式波前编码

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The emerging paradigm of imaging systems, known as wavefront coding, which employs joint optimization of both the optical system and the digital post-processing system, has not only increased the degrees of design freedom but also brought several significant system-level benefits. The effectiveness of wavefront coding has been demonstrated by several proof-of-concept systems in the reduction of focus-related aberrations and extension of depth of focus. While previous research on wavefront coding was mainly targeted at imaging systems having a small or modest field of view (FOV), we present a preliminary study on wavefront coding applied to panoramic optical systems. Unlike traditional wavefront coding systems, which only require the constancy of the modulation transfer function (MTF) over an extended focus range, wavefront-coded panoramic systems particularly emphasize the mitigation of significant off-axis aberrations such as field curvature, coma, and astigmatism. The restrictions of using a traditional generalized cubic polynomial pupil phase mask for wide angle systems are studied in this paper. It is shown that a traditional approach can be used when the variation of the off-axis aberrations remains modest. Consequently, we propose to study how a distributed wavefront coding approach, where two surfaces are used for encoding the wavefront, can be applied to wide angle lenses. A few cases designed using Zemax are presented and discussed
机译：成像系统的新兴范例，称为波阵面编码，它对光学系统和数字后处理系统进行了联合优化，不仅增加了设计自由度，而且带来了一些重大的系统级优势。几种概念验证系统已经证明了波前编码的有效性，它可以减少与焦点有关的像差并扩展焦点深度。虽然先前对波前编码的研究主要针对具有较小或适度视场（FOV）的成像系统，但我们目前对应用于全景光学系统的波前编码进行了初步研究。与传统波阵面编码系统只需要在扩展的聚焦范围内保持恒定的调制传递函数（MTF）有所不同，波阵面编码的全景系统特别强调了减轻像场弯曲，彗形像差和像散之类的轴外像差的能力。本文研究了在广角系统中使用传统的广义三次多项式光瞳相位掩模的局限性。结果表明，当离轴像差的变化保持适度时，可以使用传统方法。因此，我们建议研究如何将两个表面用于对波前进行编码的分布式波前编码方法可应用于广角镜。介绍并讨论了使用Zemax设计的一些案例

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