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Specifications: Figure and Finish are not enough

机译:规格:外观和光洁度不够

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Several examples are given of optics apparently specified only by figure and finish. Although these optics met the specifications they did not produce good images. The presumed reason for the poor performance was the lack of a specification for mid-spatial frequency roughness. We show that a reasonable specification can be applied using the concept of a structure function, a mathematically simple function easily calculated from interferometric phase data at each pixel. An example wavefront is used to show how the specification can be developed from typical figure and finish specifications and include information about roughness in the mid-spatial frequency region.
机译:给出了一些光学器件的示例,这些光学器件显然仅由图形和外观指定。尽管这些光学器件符合规格,但它们无法产生良好的图像。认为性能较差的原因是缺乏对中空间频率粗糙度的规范。我们展示了可以使用结构函数的概念来应用合理的规范,该结构函数是一个数学上简单的函数,可以轻松地从每个像素的干涉式相位数据中计算得出。以波前为例,说明如何从典型的图形和饰面规格制定规格,并包括有关中空间频率区域粗糙度的信息。

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