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Proceedings Paper

Measurements of material refractive index with a circular heterodyne interferometer
Author(s): Zhi-Cheng Jian; Jiun-You Lin; Po-Jen Hsieh; Der-Chin Su
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Paper Abstract

When a light coming from a circularly polarized heterodyne light source incidents on an optical material, a phase difference between s- and p- polarization components of the reflected light occurs. This phase difference can be measured accurately with the heterodyne interferometry. The measured data are substituted into the special equations derived from Fresnel equations, the refractive index can be estimated. This method bears both merits of a common-path interferometer and a heterodyne interferometer. The refractive indices of three optical glasses and two birefringent crystals were measured to show the validity of this method.

Paper Details

Date Published: 13 June 2005
PDF: 11 pages
Proc. SPIE 5856, Optical Measurement Systems for Industrial Inspection IV, (13 June 2005); doi: 10.1117/12.612480
Show Author Affiliations
Zhi-Cheng Jian, National Chiao Tung Univ. (Taiwan)
Jiun-You Lin, National Changhua Univ. of Education (Taiwan)
Po-Jen Hsieh, National Chiao Tung Univ. (Taiwan)
Der-Chin Su, National Chiao Tung Univ. (Taiwan)


Published in SPIE Proceedings Vol. 5856:
Optical Measurement Systems for Industrial Inspection IV
Wolfgang Osten; Christophe Gorecki; Erik L. Novak, Editor(s)

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