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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 9 — Mar. 20, 2014
  • pp: 1903–1908

Small-angle measurement with highly sensitive total-internal-reflection heterodyne interferometer

Jiun-You Lin and Yu-Cheng Liao  »View Author Affiliations


Applied Optics, Vol. 53, Issue 9, pp. 1903-1908 (2014)
http://dx.doi.org/10.1364/AO.53.001903


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Abstract

In this paper, a high-sensitivity total-internal-reflection (TIR) heterodyne interferometer is proposed for measuring small angles. In the proposed interferometer, a half-wave plate and two quarter-wave plates that exhibit specific optic-axis azimuths are combined to form a phase shifter. When a rhomboid prism is placed between the phase shifter and an analyzer that exhibits suitable transmission-axis azimuth, it shifts and enhances the phase difference of the s- and p-polarization states at double TIR. The enhanced phase difference is dependent on the incident angle; thus small angles can be easily and accurately measured by estimating the phase difference. The experimental results demonstrate the feasibility of this method. Angular resolution and sensitivity levels superior to 1.2×104deg (2.1×106rad) and 100 (deg/deg), respectively, were attainable in a dynamic range of 0.5 deg.

© 2014 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(260.5430) Physical optics : Polarization
(260.6970) Physical optics : Total internal reflection
(060.2840) Fiber optics and optical communications : Heterodyne

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: September 9, 2013
Revised Manuscript: December 10, 2013
Manuscript Accepted: February 5, 2014
Published: March 19, 2014

Citation
Jiun-You Lin and Yu-Cheng Liao, "Small-angle measurement with highly sensitive total-internal-reflection heterodyne interferometer," Appl. Opt. 53, 1903-1908 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-9-1903

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