Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1982-06-29
1985-06-11
Buczinski, S. C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
250201, 354402, 354403, G01C 310
Patent
active
045224927
ABSTRACT:
A distance measuring device comprised of a system which projects infrared rays on a distant object, a light receiving optical system positioned at a prescribed base length from the infrared ray projecting system; a sensor of the signal storage type including an array of light sensitive elements arranged in a position which approximately coincides with the imaging plane of the light receiving optical system. A control means arranged to cause the sensor to perform a storing action under a first condition in which the infrared ray projecting system is allowed to operate and also under a second condition in which the infrared ray projection system is not allowed to operate, and digital computing means designed to detect a difference between output signals of every light sensitive element respectively produced under the first and second conditions and to detect a distance to the distant object on the basis of the results of detection of the difference between these signals.
REFERENCES:
patent: 4004852 (1977-01-01), Pentecost
patent: 4274735 (1981-06-01), Tamura et al.
patent: 4368383 (1983-01-01), Shirasu et al.
patent: 4370724 (1983-01-01), Herbst et al.
Buczinski S. C.
Canon Kabushiki Kaisha
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