Distance camera device having light gate for extracting distance

Details Distance camera device having light gate for extracting distance Distance camera device having light gate for extracting distance

1995-01-31

1997-12-02

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

348 31, 348348, G01C 308, H04N 700, H04N 5232

Patent

active

056942036

ABSTRACT:
A range imaging device such as a distance camera is improved by incorporating an oscillator to generate a reference signal, a light source to emit a light modulated in accordance with the reference signal and to project the light onto a three-dimensional target. A condenser lens collects and condenses a secondary light reflected by the target and projects the secondary light onto a gating image intensifier, which selectively gates the secondary light in synchronism with a pair of out-of-phase gate signals generated in accordance with the reference signal. Range information contained in the secondary light is extracted by the gating process. A CCD camera receives the gated secondary light and produces a corresponding image signal which is processed to produce a range image of the target.

REFERENCES:
patent: 3899250 (1975-08-01), Bamberg et al.
patent: 4915498 (1990-04-01), Malek
patent: 5220164 (1993-06-01), Lieber et al.
patent: 5434612 (1995-07-01), Nettleton et al.
patent: 5467122 (1995-11-01), Bowker et al.

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