Abstract
A fringe projection technique to trace the shape of a fast-moving object is proposed. A binary-encoded fringe pattern is illuminated by a strobe lamp and then projected onto the moving object at a sequence of time. Phases of the projected fringes obtained from the sequent measurements are extracted by the Fourier transform method. Unwrapping is then performed with reference to the binary-encoded fringe pattern. Even though the inspected object is colorful, fringe orders can be identified. A stream of profiles is therefore retrieved from the sequent unwrapped phases. This makes it possible to analyze physical properties of the dynamic objects. Advantages of the binary-encoded fringe pattern for phase unwrapping also include (1) reliable performance for colorful objects, spatially isolated objects, and surfaces with large depth discontinuities; (2) unwrapped errors only confined in a local area; and (3) low computation cost.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Wei-Hung Su
Opt. Express 15(20) 13167-13181 (2007)
Ke Chen, Jiangtao Xi, Yanguang Yu, Sheng Tong, and Qinghua Guo
Appl. Opt. 52(30) 7360-7366 (2013)
Wei-Hung Su
Opt. Express 16(4) 2590-2596 (2008)