Interferometry XV: Techniques and Analysis
San Diego, CA
This paper presents a real-time 3-D, or 4-D, shape measurement technique that can reach the speed limit of a digital fringe projection system without significantly increasing the system cost. Instead of generating sinusoidal fringe patterns by a computer directly, they are produced by defocusing binary structured patterns. By this means, with a relatively inexpensive camera, the 3-D shape measurement system can double the previously maximum achievable speed, and reaches the refreshing rate of a digital-light-processing (DLP) projector: 120 Hz.
Society of Photo-Optical Instrumentation Engineers
Gong, Yuanzheng and Zhang, Song, "Improving 4-D shape measurement by using projector defocusing" (2010). Mechanical Engineering Conference Presentations, Papers, and Proceedings. 79.