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

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

Author Affiliations +

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.

Citation Download Citation

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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