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Optical Engineering

Projection moiré profilometry with high-dynamic range image
Author(s): Sen-Yih Chou; Sien Chi; Chia-Hung Cho; Ming-Jhe Du
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Paper Abstract

As a type of optical measuring apparatus, the charge-coupled diode (CCD) camera provides the capability of increasing the speed of measurement by inspecting an area with only one shot. However, the CCD camera's high-variation range of reflectivity presents an exceptional challenge for the optical measurement established on the surface. We present a method that could enable one to acquire an image with a high-dynamic range in one shot without any reduction in spatial resolution. Because of the sufficient signal-to-noise ratio, the method presented could perform the robustness of the phase-retrieving algorithm, and the surface topography could be measured more accurately.

Paper Details

Date Published: 2 March 2012
PDF: 5 pages
Opt. Eng. 51(2) 021112 doi: 10.1117/1.OE.51.2.021112
Published in: Optical Engineering Volume 51, Issue 2
Show Author Affiliations
Sen-Yih Chou, National Chiao Tung Univ. (Taiwan)
Sien Chi, National Chiao Tung Univ. (Taiwan)
Chia-Hung Cho, Industrial Technology Research Institute (Taiwan)
Ming-Jhe Du, Industrial Technology Research Institute (Taiwan)

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