Three-dimensional range camera

Details Three-dimensional range camera Three-dimensional range camera

1985-03-28

1987-08-18

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 4, 356 2, G01C 300, G01C 500, G01C 1112

Patent

active

046873252

ABSTRACT:
A non-contact sensor system measures distance from a reference plane to many remote points on the surface of an object. The set of points at which range is measured lie along a straight line (N points) or are distributed over a rectangular plane (M.times.N points). The system is comprised of a pattern generator to produce a 1.times.N array of time/space coded light rays, optionally a means such as a rotating mirror to sweep the coded light rays orthogonally by steps, a linear array camera to image subsets of the light rays incident on the object surface, and a high speed range processor to determine depth by analyzing one-dimensional scan signals. The range camera output is a one-dimensional profile or a two-dimensional area range map, typically for inspection and robotic vision applications.

REFERENCES:
patent: 3652159 (1972-03-01), Lietar
patent: 4168437 (1979-09-01), Nihonmatsu
patent: 4201475 (1980-05-01), Bodlaj
patent: 4349277 (1982-09-01), Mundy et al.
patent: 4443705 (1984-04-01), DiMatteo et al.
patent: 4443706 (1984-04-01), DiMatteo et al.
patent: 4491719 (1985-01-01), Corby, Jr.
patent: 4541723 (1985-07-01), Pirlet
M. D. Altschuler, et al., "Laser Electro-Optic System for Three-Dimensional (3-D) Topographic Mapping of Surfaces", Optical Engineering, 20,6, Nov./Dec. 1981, pp. 953-961.
S. Inokuchi, et al., "Range-Imaging System for 3-D Object Recognition," IEEE Int'l. Conf. on Pattern Recognition, Aug. 1984, pp. 806-808.

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