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首页> 外文期刊>Applied optics >Surface characterization of micro-optical components by Foucault's knife-edge method: the case of a micromirror array
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Surface characterization of micro-optical components by Foucault's knife-edge method: the case of a micromirror array

机译:用福柯的刀口法对微光学元件进行表面表征:以微镜阵列为例

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摘要

As micro-optical components are introduced into optical systems, accurate surface characterization becomes important. We describc a method for quantitative evaluation of surface deformations based on Foucault's knife-edge test. By measurement of local slopes, the surface shape of each mirror in a micromirror array has been reconstructed with a subnanomcter accuracy. In addition to low-order deformation (tilt, curvature, astigmatism), each mirror is seen to be palm-tree shaped. This may be explained by strain relaxtion in the fabrication process. Measurement on a conventional concave mirror confirms our method.
机译:随着微光学组件被引入光学系统,精确的表面表征变得重要。我们描述了一种基于福柯的刀口测试定量评估表面变形的方法。通过测量局部斜率,微镜阵列中每个镜的表面形状已经以亚纳米精度重建。除了低阶变形(倾斜,曲率,像散)外,每个反射镜都是棕榈树形的。这可以通过制造过程中的应变松弛来解释。在常规凹面镜上进行的测量证实了我们的方法。

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