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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 1 — Jan. 1, 2010
  • pp: 19–21

Vibration-desensitized interferometer by continuous phase shifting with high-speed fringe capturing

Jungjae Park and Seung-Woo Kim  »View Author Affiliations

Optics Letters, Vol. 35, Issue 1, pp. 19-21 (2010)

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Optical interferometers for surface metrology require high immunity to vibration when they are to be used outside the laboratory environment. Here we describe a continuous phase-shifting method as a means of vibration suppression, which implements phase shifting uninterruptedly while capturing resulting interference fringes at a high rate. The continuous phase shifting allows the interference initial phase under measurement to be locked to a single temporal frequency in captured fringes, thereby being recovered free from vibration by Fourier-based postprocessing. This continuous phase-shifting method can be realized with any phase-shifting interferometers by incorporating a high-speed digital camera with good intensity-to-voltage conversion linearity.

© 2009 Optical Society of America

OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(070.2615) Fourier optics and signal processing : Frequency filtering
(150.3045) Machine vision : Industrial optical metrology

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: September 28, 2009
Manuscript Accepted: November 18, 2009
Published: December 18, 2009

Jungjae Park and Seung-Woo Kim, "Vibration-desensitized interferometer by continuous phase shifting with high-speed fringe capturing," Opt. Lett. 35, 19-21 (2010)

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