Optical system for laser range finder

Details Optical system for laser range finder Optical system for laser range finder

2007-09-11

2007-09-11

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

C356S005010

Reexamination Certificate

active

10897036

ABSTRACT:
An optical system for a laser range finder comprises a laser emitter (5), a collimating lens (4) positioned in front of the laser emitter an optical receiver (3), a light receiving aspheric lens (1) for converging reflected light from a target object to be measured on the optical receiver, and a polygonal prism (2) disposed between the light receiving aspheric lens and the optical receiver. The light receiving aspheric lens defines a cutout in a position corresponding to a laser light beam emitted by the laser emitter for allowing passage of the laser light beam therethrough. The polygonal prism consists of a first portion and a second portion refracting the reflected light at different refraction angles for light path compensating purposes.

REFERENCES:
patent: 5231621 (1993-07-01), Matsui et al.
patent: 5815251 (1998-09-01), Ehbets et al.
patent: 5949531 (1999-09-01), Ehbets et al.
patent: 6407967 (2002-06-01), Odajima et al.
patent: 2004/0207832 (2004-10-01), Ohtomo et al.
patent: 2139498 (1999-10-01), None

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