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Adaptive frequency comb illumination for interferometry in the case of nested two-beam cavities

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Harder,  Irina
Optical Design and Microoptics, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Leuchs,  Gerd
Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Mantel,  Klaus
Optical Design and Microoptics, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Schwider,  Johannes
Optical Design and Microoptics, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Harder, I., Leuchs, G., Mantel, K., & Schwider, J. (2011). Adaptive frequency comb illumination for interferometry in the case of nested two-beam cavities. APPLIED OPTICS, 50(25), 4942-4956. doi:10.1364/AO.50.004942.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-6995-B
Abstract
The homogeneity test of glass plates in a Fizeau interferometer is hampered by the superposition of multiple interference signals coming from the surfaces of the glass plate as well as the empty Fizeau cavity. To evaluate interferograms resulting from such nested cavities, various approaches such as the use of broadband light sources have been applied. In this paper, we propose an adaptive frequency comb interferometer to accomplish the cavity selection. An adjustable Fabry-Perot resonator is used to generate a variable frequency comb that can be matched to the length of the desired cavity. Owing to its flexibility, the number of measurements needed for the homogeneity test can be reduced to four. Furthermore, compared to approaches using a two-beam interferometer as a filter for the broadband light source, the visibility of the fringe system is considerably higher if a Fabry-Perot filter is applied. (C) 2011 Optical Society of America