Detection of three-dimensional information with a projected plan

Details Detection of three-dimensional information with a projected plan Detection of three-dimensional information with a projected plan

1983-10-06

1986-06-10

Rosenberger, R. A.

Optics: measuring and testing

By polarized light examination

With light attenuation

250205, 356 1, G01B 1124

Patent

active

045940010

ABSTRACT:
An object is scanned first with a light plane from a variable-intensity light-plane projector, and the reflected light is used as signals to modify point by point the output of the projector in accordance with the intensity of the respective reflective-light signal. Thereupon the object is scanned a second time and the projector is instructed to apply less light than before to those points of the object from which a strong reflected-light signal was received during the first scan, and/or to apply more light to points from which a weak reflected-light signal was received during the first scan. In similar manner, a projected intensity encoded light volume is projected on an object and the reflected light is used as signals to point-by-point modify the output of the projector for subsequent projections.

REFERENCES:
patent: 4125317 (1978-11-01), Gordon et al.
patent: 4299491 (1981-11-01), Waters et al.
patent: 4443705 (1984-04-01), DiMatteo et al.
patent: 4494874 (1985-01-01), DiMatteo et al.

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