Novel grating methods for optical inspection

Anand Krishna Asundi

doi:10.1117/12.57462

1 December 1991 Novel grating methods for optical inspection

Anand Krishna Asundi

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.57462
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

The shadow moiré and reflection moiré are revisited using computer generated gratings written on a Liquid Crystal Display (LCD) panel. These gratings have the ability to rapidly and easily vary their pitch and thus their sensitivity. Further, the ability to precisely shift the gratings enables rapid image processing algorithms to be designed for enhancement of the fringes, as well as provides means for quantification using phase shifting algorithms.

Citation Download Citation

Anand Krishna Asundi "Novel grating methods for optical inspection", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.57462

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