Triangulation data integrity

Details Triangulation data integrity Triangulation data integrity

1984-10-03

1987-11-10

Hix, L. T.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356375, G01C 300

Patent

active

047053950

ABSTRACT:
Disclosed is an improved electro-optical triangulation distance sensing method and apparatus incorporating a reference detector to detect light returned from an object surface and so control light power, integration time (or other characteristic) of the primary image sensing photodetector. Ideally the reference detector is the same size as the primary photodetector and positioned effectively to see the same image of a zone of light projected on the object surface. Also disclosed are useful calibration methods for such sensors.

REFERENCES:
patent: 4310227 (1982-01-01), Znchok
patent: 4334150 (1982-06-01), Herbst et al.
patent: 4373804 (1983-02-01), Pryor et al.
patent: 4523101 (1985-06-01), Tsunekawa

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