15 May 2000 Smart PSD array for sheet-of-light range imaging
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Abstract
Sheet-of-light range imaging is an efficient technique for measuring range. A sheet of light is projected onto an object, and the cross-sectional line of the light sheet and the object is recorded with an image sensor. Range is computed by means of triangulation. In this paper we discuss the design and test results on an image sensor specifically designed for sheet-of-light. The sensor consists of an array of rectangular Position Sensitive Detectors (PSD's), combined with an on-chip multiplexer (a `smart' PSD array). A PSD delivers two photocurrents, the ratio of which is a measure for the center of gravity of the light intensity distribution over the PSD. Measurements have shown that the smart PSD-array delivers 2 million range values per second, at a 1:500 resolution. The smart PSD-array consists of an array of PSD's with a 28 micron pitch, and a length of 20 mm. A DSP board takes care of computation of the range data from the PSD signals.
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Michiel de Bakker, Michiel de Bakker, Piet W. Verbeek, Piet W. Verbeek, Gijs K. Steenvoorden, Gijs K. Steenvoorden, } "Smart PSD array for sheet-of-light range imaging", Proc. SPIE 3965, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications, (15 May 2000); doi: 10.1117/12.385443; https://doi.org/10.1117/12.385443
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