Rangefinder and measuring method

Details Rangefinder and measuring method Rangefinder and measuring method

2006-09-12

2006-09-12

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

C356S003010, C356S004010, C356S005010

Reexamination Certificate

active

07106422

ABSTRACT:
A Rangefinder capable of long and short distance measurement in company with compass measurement. The rangefinder includes distance measurement unit, a compass sensing unit and a processor. The rangefinder can selectively execute a comparison mode or a gain mode. The comparison mode is executed during short-distance measurement and the gain mode is executed during long-distance measurement. The compass measurement unit senses a terrestrial magnetism to obtain first and second magnetic sensing signals. The processor estimates a distance between the target and the rangefinder according to the measurement signal from the distance measurement unit and determines a compass orientation of the target according to the first and second magnetic sensing signals.

REFERENCES:
patent: 5291262 (1994-03-01), Dunne
patent: 5691808 (1997-11-01), Nourrcier et al.
patent: 6313464 (2001-11-01), Schrader

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