Variable depth range camera

Details Variable depth range camera Variable depth range camera

1989-05-01

1990-10-16

Tarcza, Thomas H.

Optics: measuring and testing

Range or remote distance finding

With photodetection

354403, 356 4, G01C 308

Patent

active

049630172

ABSTRACT:
A variable depth triangulation ranging system is reconfigurable in real time in the sense that any two of the three performance measures, standoff distance, depth of field, and range resolution at a point within the depth of field, are selected by the user and the system geometrically reconfigures itself to provide the requested performance. The system is composed of a light beam emitting component such as a laser, a linear photodetector, and an imaging lens component. Any of these components has a fixed location and the other two are movable and positioned so that the Scheimpflug condition to guarantee blur-free imaging of reflected target returns is satisfied; the laser beam, a plane axis through the imaging lens component, and an image line through the photodetector all intersect at a common point. A scanner assembly is added to scan the laser beam along a line and over an area.

REFERENCES:
patent: 4269512 (1981-05-01), Nosler
patent: 4373805 (1983-02-01), Mallinson
patent: 4453083 (1984-06-01), Bohlander et al.
patent: 4494868 (1985-01-01), Lambeth
patent: 4830485 (1989-05-01), Penney et al.
SPSE Handbook of Photographic Science and Engineering, ed. W. Thomas, Jr., 1973, John Wiley & Sons, pp. 181-185.

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