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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 1 — Jan. 1, 2007
  • pp: 87–94

Real-time heterodyne imaging interferometry: focal-plane amplitude and phase demodulation using a three-phase correlation image sensor

Akira Kimachi  »View Author Affiliations

Applied Optics, Vol. 46, Issue 1, pp. 87-94 (2007)

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A method of real-time heterodyne imaging interferometry using a three-phase correlation image sensor (3PCIS) is proposed. It simultaneously demodulates the amplitude and phase images of an incident interference pattern at an ordinary frame rate with good accuracy, thus overcoming the trade-off among measurement time, spatial resolution, and demodulation accuracy suffered in conventional interferometry. An experimental system is constructed with a 64 × 64 3PCIS camera operated at 30   frames∕s and a two-frequency He–Ne laser with a beat frequency of 25   kHz . The results obtained for a scanning mirror and heated silicone oil confirm the proposed method.

© 2007 Optical Society of America

OCIS Codes
(040.1240) Detectors : Arrays
(040.2840) Detectors : Heterodyne
(100.2550) Image processing : Focal-plane-array image processors
(110.2970) Imaging systems : Image detection systems
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:

Original Manuscript: May 22, 2006
Revised Manuscript: August 28, 2006
Manuscript Accepted: September 8, 2006

Akira Kimachi, "Real-time heterodyne imaging interferometry: focal-plane amplitude and phase demodulation using a three-phase correlation image sensor," Appl. Opt. 46, 87-94 (2007)

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