High-accuracy ultrastable moving stage using a novel self-zooming optical scale

被引:15
作者
Matsumoto, H
Minoshima, K
机构
[1] Natl. Res. Laboratory of Metrology, Tsukuba, Ibaraki 305
关键词
Common-path interferometer; Dispersion interferometer; Frequency doubling; High-accuracy stage; Picometer;
D O I
10.1016/0030-4018(96)00532-9
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A high-accuracy ultrastable moving stage with picometer resolution is realised using a novel self-zooming optical scale, which is generated by a new interferometer with two frequency-doubling crystals and was extremely stable because of its common path. The position of a reflecting mirror is controlled by detecting the interference fringe and feeding back the signal to a piezoelectric translator with a resolution of 0.25 nm. Evaluation of the linearity of a conventional linear scale was performed with an accuracy of better than 1 nm.
引用
收藏
页码:417 / 420
页数:4
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