Biconic White multipass cell design based on a skew ray-tracing model

Guo Yin; Sun Liqun

摘要

A biconic White multipass cell (bi-WMPC), designed as a compact, zero-geometrical-loss, anastigmatic optical system, capably used with an extended divergent source, is proposed. First, a skew ray-tracing model is developed for a conventional White-type multipass cell (WMPC), based on which the astigmatism is calculated, together with its sensitivity coefficients in relation to all-important optical structural parameters in various configurations. Next, a generalized bi-WMPC is designed to suppress the astigmatism, which leads to much smaller reflection spots on the field mirror compared to the conventional design. The demonstration of an optimized bi-WMPC initialized from a commercial WMPC (52 pass with a 0.8 m base length) suggests a 53 fold reduction of the wavefront error value from 79.187 lambda to 1.493 lambda, as well as the path-to-volume ratio (PVR) increase from 20.8 to 35.2 m/L. These improvements are critical for the design of a compact WMPC with a path length of tens to hundreds of meters. Presently developed skew ray-tracing models for a WMPC can also be applied to other free-form surfaces to further compensate the inherent aberrations induced by multiple off-axis reflections. (C) 2017 Optical Society of America

机译：提出了一种设计为紧凑，零几何损失，可与延伸的发散源一起使用的紧凑型零几何损耗的零下零损伤，纵向源光学系统。首先，为传统的白型多辅元电池（WMPC）开发了歪斜追踪模型，基于该散度差异，以及其敏感系数与各种配置中的全部重要光学结构参数相关的散光系数。接下来，设计广泛的BI-WMPC以抑制像散，这与传统设计相比，该镜镜上导致越小的反射斑点。从商业WMPC初始化的优化BI-WMPC（52次底部长度52次）的证明表明，从79.187λ到1.493λ的波前误差值的减少53倍，以及路径到体积比（PVR）从20.8增加到35.2米/升。这些改进对于设计紧凑型WMPC的设计至关重要，路径长度为数百米。目前，用于WMPC的偏光射线跟踪模型也可以应用于其他自由形状表面，以进一步补偿由多个离轴反射的多个偏离轴反射引起的固有像差。（c）2017年光学学会

Biconic White multipass cell design based on a skew ray-tracing model

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