Scattered light range of view measurement apparatus

Details Scattered light range of view measurement apparatus Scattered light range of view measurement apparatus

2006-12-11

2008-08-19

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

Reexamination Certificate

active

07414703

ABSTRACT:
A method and apparatus for determining a range of sight which are capable of monitoring and correcting the operability of the instrument. A light emitter directs an emitted light beam to a measurement zone and a light receiver receives a received light beam from the measurement zone. The emitted light beam and the received light beam cross each other in the measurement zone. A deflector deflects at least a portion of the emitted light beam downstream of the measurement zone along a light transmitting path and directs the portion of the emitted light beam into the received light beam at a side of the measurement zone opposite from the light receiver. An optical shutter intermittently closes the light transmitting path in a temporally controlled manner.

REFERENCES:
patent: 4346293 (1982-08-01), Fetzer
patent: 6266136 (2001-07-01), Ramer et al.
patent: 2004/0051860 (2004-03-01), Honda et al.
patent: 0036370 (1981-09-01), None
patent: 0664445 (1995-07-01), None

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