Theory of point-spread function artifacts due to structured mid-spatial frequency surface errors.

Theory of point-spread function artifacts due to structured mid-spatial frequency surface errors.
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由于结构化中空间频率表面误差而导致的点扩散函数伪影理论。

DOI:
10.1364/ao.49.004814
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发表时间:
2010
期刊:
影响因子:
1.9
通讯作者:
T. Milster
T. Milster
中科院分区:
工程技术4区
文献类型:
--
作者:
John M. Tamkin;W. Dallas;T. Milster

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非球面或自由曲面的光学设计和公差需要注意面形、结构化表面误差和非结构化误差。我们使用调和(傅立叶)分解来描述结构化表面误差轮廓以及对图像点扩展函数的影响。光束足迹上的表面误差映射到光瞳上,其中多个结构化表面频率混合在一起,在每个场点的像平面上产生和和差衍射级。不同的频率加宽了点扩展函数的中央瓣,而求和频率则产生重影图像。
Optical design and tolerancing of aspheric or free-form surfaces require attention to surface form, structured surface errors, and nonstructured errors. We describe structured surface error profiles and effects on the image point-spread function using harmonic (Fourier) decomposition. Surface errors over the beam footprint map onto the pupil, where multiple structured surface frequencies mix to create sum and difference diffraction orders in the image plane at each field point. Difference frequencies widen the central lobe of the point-spread function and summation frequencies create ghost images.
DOI: 10.1117/12.787960
发表时间: 2008-07
期刊: --
影响因子: --
作者:
A. Beaucamp;R. Freeman;R. Morton;Karthik Ponudurai;D. Walker
通讯作者: A. Beaucamp;R. Freeman;R. Morton;Karthik Ponudurai;D. Walker