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

0456305 - ÚPT 2016 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Buchta, Zdeněk - Mikel, Břetislav - Řeřucha, Šimon - Lazar, Josef - Číp, Ondřej
Light source for low-coherence interferometry combining LED and single mode optical fibre.
Photonics, Devices, and Systems V. (Proceedings of SPIE 8306). Bellingham: SPIE, 2011, 83060E:1-5. ISBN 9780819489531.
[Conference on Photonics, Devices, and Systems /5./. Prague (CZ), 24.08.2011-26.08.2011]
Grant CEP: GA ČR GP102/09/P293; GA MPO 2A-1TP1/127; GA MŠMT(CZ) LC06007; GA MŠMT ED0017/01/01
Institucionální podpora: RVO:68081731
Klíčová slova: low-coherence interferometry * high-luminescent LED * optical fibre * gauge block
Kód oboru RIV: JA - Elektronika a optoelektronika, elektrotechnika

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.
Trvalý link: http://hdl.handle.net/11104/0256856