Arrangement for improved scanned 3-D measurement

Details Arrangement for improved scanned 3-D measurement Arrangement for improved scanned 3-D measurement

1985-04-25

1987-08-25

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356 4, 354404, G01C 308

Patent

active

046894802

ABSTRACT:
An arrangement for 3-D optical measurement systems employing scanned light beams or planes. A lens used to image projected light that is reflected from a measured surface, is moved onto a light-sensitive detector. The lens movement is coordinated with the movement of the projected light beam or plane to assure that the image on the detector remains in sharp focus at all times. The sharp focus is maintained by moving the detector in coordination with the movement of the projected light beam or plane, or by changing the effective optical path lengths to the detector in coordination with the movement of the projected light beam or plane.

REFERENCES:
patent: 4248532 (1981-02-01), Nosler
patent: 4269512 (1981-05-01), Nosler
patent: 4304487 (1981-12-01), Odone et al.
patent: 4373805 (1983-02-01), Mallinson
patent: 4494868 (1985-01-01), Lambeth
patent: 4522492 (1985-06-01), Masunaga

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