Interferometry

Polarization phase-shifting Fizeau interferometer with a cyclic path optical configuration

[+] Author Affiliations
Sanjib Chatterjee

Raja Ramanna Centre for Advanced Technology, Department of Atomic Energy, Indore 452013 India

Y. Pavan Kumar

Raja Ramanna Centre for Advanced Technology, Department of Atomic Energy, Indore 452013 India

Opt. Eng. 48(11), 115601 (November 18, 2009). doi:10.1117/1.3264956
History: Received May 12, 2009; Revised September 11, 2009; Accepted September 22, 2009; Published November 18, 2009; Online November 18, 2009
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A new technique, using a cyclic path optical configuration, for generating two coherent, virtual point sources at the back focal plane of a corrected telescope objective, for producing a pair of mutually tilted collimated beams with linear orthogonal polarizations in a Fizeau interferometer cavity is presented. The orthogonal linear polarization components reflected from the reference and the test surfaces are utilized for introducing polarization phase shift between the reference and test waves. A method for elimination of the residual instrumental aberration due to a slight departure from strict on-axis operation is discussed. The result for a plane optical surface is presented. Because, in polarization phase shifting, it is possible to capture all the necessary phase-shifted interferograms simultaneously, the vibration susceptibility can be minimized and the present system could be applied for dynamic interferometry.

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© 2009 Society of Photo-Optical Instrumentation Engineers

Citation

Sanjib Chatterjee and Y. Pavan Kumar
"Polarization phase-shifting Fizeau interferometer with a cyclic path optical configuration", Opt. Eng. 48(11), 115601 (November 18, 2009). ; http://dx.doi.org/10.1117/1.3264956


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