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Title: Pseudo-interferometric laser range finder for robot applications
Authors: Srinivasan, Venugopal 
Lumia, Ronald
Issue Date: Feb-1989
Citation: Srinivasan, Venugopal, Lumia, Ronald (1989-02). Pseudo-interferometric laser range finder for robot applications. IEEE Transactions on Robotics and Automation 5 (1) : 98-105. ScholarBank@NUS Repository.
Abstract: A description is given of a low-cost laser ranger suitable for robot applications. The region to be observed is illuminated by a sinusoidal intensity distribution generated by an optical projection system with a laser source. The deformation of the sine-wave pattern is detected by a phase-sensing method widely used in optical interferometry, and can be easily related to the shape and range information. Over a range determined by the depth of field of the camera at a given aperture and focal setting, high-resolution measurements can be made. Experimental results show that at a camera distance of about 1 m, the resolution and repeatability in locating a flat 25-mm2 surface are of the order of 0.2 mm.
Source Title: IEEE Transactions on Robotics and Automation
ISSN: 1042296X
DOI: 10.1109/70.88021
Appears in Collections:Staff Publications

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