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Proceedings Paper

Light source for low-coherence interferometry surface diagnostics
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Paper Abstract

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 of the white light spectra, a 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 part 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.

Paper Details

Date Published: 26 July 2011
PDF: 7 pages
Proc. SPIE 8001, International Conference on Applications of Optics and Photonics, 80013E (26 July 2011); doi: 10.1117/12.892226
Show Author Affiliations
Zdeněk Buchta, Institute of Scientific Instruments (Czech Republic)
Bretislav Mikel, Institute of Scientific Instruments (Czech Republic)
Simon Rerucha, Institute of Scientific Instruments (Czech Republic)
Josef Lazar, Institute of Scientific Instruments (Czech Republic)
Ondrej Cip, Institute of Scientific Instruments (Czech Republic)


Published in SPIE Proceedings Vol. 8001:
International Conference on Applications of Optics and Photonics
Manuel Filipe Costa, Editor(s)

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