White-light fringe detection based on a novel light source and colour CCD camera

被引：21

作者：

Buchta, Z. ^{[1
]}

Mikel, B. ^{[1
]}

Lazar, J. ^{[1
]}

Cip, O. ^{[1
]}

机构：

[1] Acad Sci Czech Republic, Inst Sci Instruments, CS-61264 Brno, Czech Republic

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2011年 / 22卷 / 09期

关键词：

low-coherence interferometry; phase-crossing algorithm; CCD camera; gauge block; INTERFEROMETRY; ALGORITHM;

D O I：

10.1088/0957-0233/22/9/094031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We describe in this paper a pilot experiment of optimization of a white-light source for a low-coherence interferometry. The white-light source combines the light beams generated with colour LEDs. By modelling the white-light spectra, the contrast of a white-light interference fringe could be changed and set to the maximal value. The second part of this paper is a description of a white-light fringe analysis ensured with a low-cost colour CCD camera. The used detection technique employs a phase-crossing algorithm which identifies a zero optical path difference as the point where the phase difference between the red, green and blue parts of the white-light interference fringe becomes equal to zero. The optimized white-light source is designed to be a crucial part of an experimental setup for the surface diagnostics and automatic calibration of gauge blocks.

引用

页数：6

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