Laser beam type distance measuring device

Details Laser beam type distance measuring device Laser beam type distance measuring device

1998-04-28

2000-02-08

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

180169, 356 401, G01C 308, B60T 716

Patent

active

060233230

ABSTRACT:
A laser beam type distance measuring device comprising a laser beam emitter; a laser beam receiver having a going laser beam sensor and a returning laser beam sensor; an electrical signal processing circuit connected to the going and returning laser beam sensors; a returning laser beam guide way leading to the returning laser beam sensor; a polygon mirror for reflecting a going laser beam from the laser beam emitter toward a remote object and reflecting a returning laser beam from the object toward the returning laser beam guide way along which the returning laser beam travels to the returning laser beam sensor; and a reference optical track having one end directed to the laser beam emitter and the other end directed to the going laser beam sensor, so that a first part of the going laser beam from the laser beam emitter travels to the going laser beam sensor through the reference optical track. In the present invention, there is further provided a laser transmitting member, such as an optical fiber, which is arranged in parallel with path to and from the object. The laser transmitting member has one end directed to the laser beam emitter and the other end directed to the returning laser beam sensor, so that a second part of the going laser beam from the laser beam emitter travels to the returning laser beam sensor through the laser transmitting member.

REFERENCES:
patent: 4511249 (1985-04-01), Frungel et al.
patent: 4521107 (1985-06-01), Chaborski et al.
patent: 4533242 (1985-08-01), McLauchlan et al.
patent: 5006721 (1991-04-01), Cameron et al.
patent: 5377219 (1994-12-01), Geiger

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