EVALUATION OF HIGHLY CORRECTED OPTICS BY MEASUREMENT OF THE STREHL RATIO

被引:12
作者
BOBROFF, N
ROSENBLUTH, AE
机构
[1] Thomas J. Watson Research Center, IBM, Yorktown Heights, NY, 10598
来源
APPLIED OPTICS | 1992年 / 31卷 / 10期
关键词
STREHL RATIO; LENS EVALUATION;
D O I
10.1364/AO.31.001523
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The Strehl ratio (SR) is a measure of image quality that is especially relevant to recording media of finite contrast, such as photoresist, film, and the human retina. The SR is accessible experimentally from the total power and maximum irradiance in the point spread function (PSF). Measurement error is introduced by the finite dimension of the pinhole aperture that is used to generate a detectable image. This systematic error can be related parametrically to the object geometry and illumination system, and the SR can be corrected to within a few percent. Systematic corrections also compensate for the portion of the PSF irradiance that falls outside the data integration window in the image plane. An optical test bench is constructed to measure the SR over the lens field and azimuth to an accuracy of 5% and a repeatability of 1%.
引用
收藏
页码:1523 / 1536
页数:14
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