Rangefinder

Details Rangefinder Rangefinder

1993-06-14

1994-12-13

Perkey, W.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 1, G03B 1336, G01C 308

Patent

active

053733444

ABSTRACT:
A rangefinder for detecting a distance of an object from the rangefinder by employing a triangular measuring system has a radiation emitter to emit infrared radiation towards the object; a position detector having a close-range detecting reglon and a remote-range detecting region, which are separate and independent of each other; a close-range converging lens for focusing the radiation reflected by the object on the close-range detecting region, when the distance of the object from the rangefinder is smaller than a predetermined distance; and a remote-range converging lens for focusing the radiation reflected by the object on the remote-range detecting region, when the distance of the object from the rangefinder is greater than a predetermined distance.

REFERENCES:
patent: 4485303 (1984-11-01), Suzuki
patent: 4534636 (1985-08-01), Sugawara
patent: 4636068 (1987-01-01), Niiho et al.
patent: 4833497 (1989-05-01), Sugawara
patent: 4963913 (1990-10-01), Shindo et al.
patent: 4983033 (1991-01-01), Suzuki
patent: 4999661 (1991-03-01), Ueno et al.
patent: 5001508 (1991-03-01), Ogawa
patent: 5051767 (1991-09-01), Honma et al.
patent: 5096289 (1992-03-01), Mogamiya et al.
patent: 5137350 (1992-08-01), Misawa et al.
patent: 5184167 (1993-02-01), Iida et al.

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