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24 August 2006 Projected fringe profilometry using a hologram for objects with large depth discontinuities
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In this paper, we provide a technique using a hologram as a diffractive element for finding the absolute shape of an object with large depth discontinuities. The proposed method offers following major advantages: (1) a large depth-of-field in the projection system, (2) very low fringe distortion (even for a large field of view), (3) only one phase measurement needed for operation, (4) easiness for calibration, (5) robust performance to analyze surfaces with lots of discontinuities, especially for automatic phase unwrapping, and (6) a very compact design for the measurement system. The single-shot property also makes it possible for measurements of dynamic objects with large depth discontinuities.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wei-Hung Su, Wei-Jen Chen, Jun-Shan Huang, and Cho-Yo Kuo "Projected fringe profilometry using a hologram for objects with large depth discontinuities", Proc. SPIE 6314, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XII, 63140P (24 August 2006);

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