Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1982-08-18
1985-01-22
Buczinski, S. C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
250204, 250553, 354403, G01C 310, G03B 708
Patent
active
044948689
ABSTRACT:
An improved automatic rangefinder device of the type having means for projecting a beam of light to illuminate a spot on a distant object, and an image sensor for viewing the object and determining the distance thereto by the observed position of the illuminated spot is disclosed. The rangefinder includes improved means for forming the beam of light comprising an elongated light source and projection optics for forming a real image of the light source, thereby defining an elongated beam region in space corresponding to the image of the light source, extending generally away from the rangefinder, whereby an object located in said beam region will be illuminated by a spot of light having an in-focus component. The image sensor detects the position of the in-focus component of the light. The rangefinder device includes imaging optics for imaging the spot on the image sensor. The imaging optics and the image sensor are arranged so that a real image of the image sensor formed by the imaging optics substantially coincides with the real image of the light source in the beam region of space.
REFERENCES:
patent: 3599552 (1971-08-01), Harvey
patent: 3936187 (1976-02-01), Momose
patent: 4248532 (1981-02-01), Nosler
patent: 4269512 (1981-05-01), Nosler
patent: 4274735 (1981-06-01), Tamura et al.
Buczinski S. C.
Close Thomas H.
Eastman Kodak Company
Sotomayor John B.
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