Photogrammetric laser system

Details Photogrammetric laser system Photogrammetric laser system

1991-10-15

1993-06-01

Rosenberger, Richard A.

Optics: measuring and testing

Contour plotting

356375, G01C 302

Patent

active

052164764

ABSTRACT:
The close range Photogrammetric Laser System ("PLS") is an all digital system designed to measure three dimensional ("3-D") surfaces at relatively close ranges. The PLS comprises two modified stereo cameras with associated analog video and digital recording capability. Using synchronized laser illumination and X and Y cylindrical lens arrangements in each stereo camera, all laser illuminated points can be focused onto a linear detector array whose intensities are used to calculate X and Y position of a 3-D target in the image plane of each camera. Photogrammetric techniques are then used to calculate an X, Y and Z position from the X and Y positions measured in the two stereo cameras. An alternate embodiment eliminates the intermediate recording step in favor of a direct recording in the memory of a data processing system for subsequent manipulation.

REFERENCES:
patent: 4146926 (1979-03-01), Clerget et al.
patent: 4534650 (1985-08-01), Clerget et al.
patent: 4653316 (1987-03-01), Fukuhara
patent: 4700223 (1987-10-01), Shoutaro et al.

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