Light source for low-coherence interferometry surface diagnostics

Zdeněk Buchta; Bretislav Mikel; Simon Rerucha; Josef Lazar; Ondrej Cip

doi:10.1117/12.892226

26 July 2011 Light source for low-coherence interferometry surface diagnostics

Zdeněk Buchta, Bretislav Mikel, Simon Rerucha, Josef Lazar, Ondrej Cip

Proceedings Volume 8001, International Conference on Applications of Optics and Photonics; 80013E (2011) https://doi.org/10.1117/12.892226
Event: International Conference on Applications of Optics and Photonics, 2011, Braga, Portugal

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.

Citation Download Citation

Zdeněk Buchta, Bretislav Mikel, Simon Rerucha, Josef Lazar, and Ondrej Cip "Light source for low-coherence interferometry surface diagnostics", Proc. SPIE 8001, International Conference on Applications of Optics and Photonics, 80013E (26 July 2011); https://doi.org/10.1117/12.892226

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