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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 6, Iss. 11 — Nov. 1, 2008
  • pp: 830–832

Absolute small-angle measurement based on optical feedback interferometry

Jingang Zhong, Xianhua Zhang, and Zhixiang Ju  »View Author Affiliations

Chinese Optics Letters, Vol. 6, Issue 11, pp. 830-832 (2008)

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We present a simple but effective method for small-angle measurement based on optical feedback interferometry (or laser self-mixing interferometry). The absolute zero angle can be defined at the biggest fringe amplitude point, so this method can also achieve absolute angle measurement. In order to verify the method, we construct an angle measurement system. The Fourier-transform method is used to analysis the interference signal. Rotation angles are experimentally measured with a resolution of 10^{-6} rad and a measurement range of approximately from -0.0007 to +0.0007 rad.

© 2008 Chinese Optics Letters

OCIS Codes
(120.1680) Instrumentation, measurement, and metrology : Collimation
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.3940) Instrumentation, measurement, and metrology : Metrology

Jingang Zhong, Xianhua Zhang, and Zhixiang Ju, "Absolute small-angle measurement based on optical feedback interferometry," Chin. Opt. Lett. 6, 830-832 (2008)

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