Light source for low-coherence interferometry combining LED and single mode optical fiber

Zdenek Buchta; Břetislav Mikel; Šimon Řeřucha; Josef Lazar; Ondřej Číp

doi:10.1117/12.912599

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11 October 2011 Light source for low-coherence interferometry combining LED and single mode optical fiber

Zdenek Buchta, Břetislav Mikel, Šimon Řeřucha, Josef Lazar, Ondřej Číp

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Proceedings Volume 8306, Photonics, Devices, and Systems V; 83060E (2011) https://doi.org/10.1117/12.912599
Event: Photonics Prague 2011, 2011, Prague, Czech Republic

Abstract

This paper describes 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. Hereafter, a concept of the light source for the low-coherence interferometry based on high-luminescent LED and single mode optical fibres is presented.The design comes out form a requirement to have an output beam combining a white-light beam and a laser beam. In the case of coaxial white-light and laser beam, the white-light interferometer is precisely combined with an incremental laser interferometer. This combination allows doing online surface diagnostics with high precision. 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.

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Zdenek Buchta, Břetislav Mikel, Šimon Řeřucha, Josef Lazar, and Ondřej Číp "Light source for low-coherence interferometry combining LED and single mode optical fiber", Proc. SPIE 8306, Photonics, Devices, and Systems V, 83060E (11 October 2011); https://doi.org/10.1117/12.912599

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