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Depth of focus analysis of optical systems using tunable aperture stops with a moderate level of absorption

机译:使用可调节孔径光阑并具有中等吸收水平的光学系统的焦点深度分析

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摘要

The size of the aperture stop of a lens is a major parameter to define, e.g., the depth of focus of an optical imaging system. In conventional systems, totally absorbing apertures are generally assumed. Their optical performance can be easily described by a geometric ray model. We propose an extended model to estimate the depth of focus with respect to a nontotally absorbing circular aperture, which may correspond to new concepts for tunable apertures, in particular for micro-optical systems. We present specifications to analyze and optimize the performance of those systems and verify the theoretical model by experimental depth of focus measurements with a partly transparent aperture.
机译:透镜的孔径光阑的尺寸是用于定义例如光学成像系统的焦深的主要参数。在常规系统中,通常假定完全吸收孔。它们的光学性能可以通过几何射线模型轻松描述。我们提出了一个扩展模型来估计相对于非完全吸收的圆形光圈的聚焦深度,这可能对应于可调光圈的新概念,特别是对于微光学系统。我们提出了规范,以分析和优化那些系统的性能,并通过具有部分透明光圈的实验焦深测量来验证理论模型。

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