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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 1 — Jan. 1, 2002
  • pp: 101–107

Investigation of Membrane Deformation by a Fringe Projection Method

Shihua Wang, Cho Jui Tay, Chenggen Quan, and Huai Min Shang  »View Author Affiliations


Applied Optics, Vol. 41, Issue 1, pp. 101-107 (2002)
http://dx.doi.org/10.1364/AO.41.000101


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Abstract

An optical method has been developed to measure the deformation of a membrane in a microphone. A fringe projector that consists of an optical fiber and an optical wedge is described and analyzed by geometric optics. A three-step phase-shifting technique that involves the introduction of an arbitrary phase is discussed. The fine fringe patterns projected onto a small test surface are captured by a CCD camera mounted on a long-distance microscope. With the aid of a phase-shifting technique and signal-demodulating techniques, the proposed setup is capable of measuring deformation of the membrane of the order of as much as submicrometers.

[Optical Society of America ]

OCIS Codes
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing

Citation
Shihua Wang, Cho Jui Tay, Chenggen Quan, and Huai Min Shang, "Investigation of Membrane Deformation by a Fringe Projection Method," Appl. Opt. 41, 101-107 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-1-101

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