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|Title:||Shape identification using phase shifting interferometry and liquid-crystal phase modulator|
|Authors:||Tay, C.J. |
|Source:||Tay, C.J., Quan, C., Shang, H.M. (1998-11). Shape identification using phase shifting interferometry and liquid-crystal phase modulator. Optics and Laser Technology 30 (8) : 545-550. ScholarBank@NUS Repository. https://doi.org/10.1016/S0030-3992(99)00010-9|
|Abstract:||A phase shifting technique using a Michelson interferometry system is presented and applied to surface contour measurement. Hyperbolic fringes are produced by the interference of two spherical wavefronts expanded from a beam expander. The fringe pattern is projected on an object surface and the deformed grating image is captured by a CCD camera for subsequent analysis by a PC. Phase variation is achieved by a liquid-crystal device incorporated in the Michelson interferometry system. Results obtained using the proposed method for objects of various shapes and sizes compared well with those from a conventional profilometer.|
|Source Title:||Optics and Laser Technology|
|Appears in Collections:||Staff Publications|
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