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|Title:||Investigation of membrane deformation by a fringe projection method|
|Authors:||Wang, S. |
|Source:||Wang, S.,Tay, C.J.,Quan, C.,Shang, H.M. (2002-01-01). Investigation of membrane deformation by a fringe projection method. Applied Optics 41 (1) : 101-107. ScholarBank@NUS Repository.|
|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.|
|Source Title:||Applied Optics|
|Appears in Collections:||Staff Publications|
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