Passive range finding apparatus utilizing television sensors

Details Passive range finding apparatus utilizing television sensors Passive range finding apparatus utilizing television sensors

1989-03-07

1990-11-13

Tarcza, Thomas H.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 12, 358 88, 358107, 382 1, G01C 308, G01C 314, H04N 718

Patent

active

049697358

ABSTRACT:
The range to an object is obtained by conveying light rays from the object through an afocal telescope to spatially displaced objective lenses that view the scene from two displaced points of view. The scene images from the objective lenses are focussed on two television sensors, respectively. The video frame from the TV sensors are digitized and stored in respective frame grabbers. A timing and logic circuit controls the television sensors and frame grabbers to alternately provide frames from the two television sensors to a monitor. The timing and logic circuit time shifts the output of one of the frame grabbers with respect to the output of the other frame grabber. A correlator responsive to the frame grabber outputs provides the correlation therebetween. The time shift required to bring the video images of the object into coincidence, at the correlation peak, provides a measure of the range to the object.

REFERENCES:
patent: 2786096 (1957-03-01), Palmer
patent: 4341447 (1982-07-01), Biber
patent: 4396945 (1983-08-01), DiMatteo et al.
patent: 4556986 (1985-12-01), Craig
patent: 4589770 (1986-05-01), Jones et al.
patent: 4601053 (1986-07-01), Grumet
patent: 4606630 (1986-08-01), Haruki et al.
patent: 4635203 (1987-01-01), Merchant

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