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26 July 2011 Light source for low-coherence interferometry surface diagnostics
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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.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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