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Optical Engineering

Two-dimensional rotation angle measurement using a sinusoidal phase-modulating laser diode interferometer
Author(s): Osami Sasaki; Chikao Togashi; Takamasa Suzuki
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Paper Abstract

We propose a simple setup for measurement of a small 2-D rotation angle using a Twyman-Green laser diode interferometer. Sinusoidal phase-modulating interferometry is adopted to detect the phase of the interference signal with a high accuracy and to perform the phase lock to eliminate the phase fluctuation at the standard detection point. By detecting the phases at three points along an axis, the 1-D rotation angle is measured with an accuracy of 0.5 arcsec in the range of 282 arcsec and with a spatial resolution of 3 mm. The 2-D rotation angle measurement is easily made by adding two more detection points.

Paper Details

Date Published: 1 April 2003
PDF: 5 pages
Opt. Eng. 42(4) doi: 10.1117/1.1554407
Published in: Optical Engineering Volume 42, Issue 4
Show Author Affiliations
Osami Sasaki, Niigata Univ. (Japan)
Chikao Togashi, Niigata Univ. (Japan)
Takamasa Suzuki, Niigata Univ. (Japan)

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