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Optical Engineering

Small-dynamic-angle measurement using tangent relationship and phase-modulating technique
Author(s): Defeng Zheng; Xiangzhao Wang; Osami Sasaki
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Paper Abstract

A method using two prisms for measurement of small dynamic angles is proposed in which the measurement is based on a simple tangent equation and a phase-modulating interferometer with a laser diode to measure dynamic optical path differences with higher accuracy. Owing to the simple tangent equation, the symmetry requirement on the two prisms in the optical configuration is eliminated, and easy measurement of the separations between two parallel beams with a position-sensitive detector is achieved. Small-dynamic-angle measurements are experimentally demonstrated with high accuracy.

Paper Details

Date Published: 1 September 2007
PDF: 4 pages
Opt. Eng. 46(9) 093602 doi: 10.1117/1.2784480
Published in: Optical Engineering Volume 46, Issue 9
Show Author Affiliations
Defeng Zheng, Shanghai Institute of Optics and Fine Mechanics (China)
Xiangzhao Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Osami Sasaki, Niigata Univ. (Japan)

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