Surveying instrument

Details Surveying instrument Surveying instrument

2006-08-15

2006-08-15

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Range or remote distance finding

With photodetection

C356S004010, C356S003010, C356S003100, C356S008000, C356S011000

Reexamination Certificate

active

07092076

ABSTRACT:
A surveying instrument, comprising a collimation optical system and a visible laser projecting device with a visible laser light source unit for emitting a point light, wherein the surveying instrument comprises a photodetector for detecting a reflection light entering from the collimation optical system, and a control means for controlling light emission of the visible laser light source unit based on a detection result of the photodetector.

REFERENCES:
patent: 4040740 (1977-08-01), Handtmann et al.
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patent: 5905592 (1999-05-01), Gohdo et al.
patent: 5978335 (1999-11-01), Clark et al.
patent: 6476943 (2002-11-01), Yertoprakhov
patent: 6493067 (2002-12-01), Kodaira et al.
patent: 0 429 012 (1991-05-01), None
patent: 10-132557 (1998-05-01), None

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