White light phase-shifting interferometry with self-compensation of PZT scanning errors

被引:11
作者
Kim, SW [1 ]
Kang, MG [1 ]
Lee, SY [1 ]
机构
[1] Korea Adv Inst Sci & Technol, Dept Mech Engn, Taejon 305701, South Korea
来源
OPTICAL ENGINEERING FOR SENSING AND NANOTECHNOLOGY (ICOSN'99) | 1999年 / 3740卷
关键词
white light interferometry; self-calibration; scanning errors; measurement uncertainty; surface metrology;
D O I
10.1117/12.347782
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
One of main error sources in scanning white light interferometry is the inaccuracy of scanning mechanisms for which PZT piezoelectric ceramics actuators are widely used. In this paper, we propose a new calibration method being capable of identifying actual scanning errors directly by analyzing the spectral distribution of sampled interferograms. Experimental results prove that the method provides an effective means of in-silts self-calibration enhancing the measurement uncertainty by one order of magnitude.
引用
收藏
页码:16 / 19
页数:4
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