Large-aperture high-accuracy phase-shifting digital flat interferometer

被引:18
作者
Chen, JB [1 ]
Song, DZ [1 ]
Zhu, RH [1 ]
Wang, Q [1 ]
Chen, L [1 ]
Chen, DJ [1 ]
机构
[1] ANHUI INST TECHNOL, HEFEI 230031, ANHUI, PEOPLES R CHINA
关键词
phase-shifting interferometry; plane standards;
D O I
10.1117/1.600627
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A large-aperture high-accuracy phase-shifting digital flat interferometer that is a combination of optics, mechanics, electricity, and algorithm is described, The aperture size is 250 mm and a liquid surface is used as an absolute flat to eliminate system error. The accuracy is better than lambda/50 (lambda=0.6328 mu m, peak-to-valley value). The tested aperture can be enlarged to 500 mm. This interferometer has been used as an optical flat standard instrument for China. The optical interferometer, phase shifter, and calibration of precision are described. (C) 1996 Society of Photo-Optical Instrumentation Engineers.
引用
收藏
页码:1936 / 1942
页数:7
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