Laser surveying instrument

Details Laser surveying instrument Laser surveying instrument

2006-10-06

2008-10-07

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Angle measuring or angular axial alignment

Relative attitude indication along 3 axes with photodetection

Reexamination Certificate

active

07433028

ABSTRACT:
A laser surveying instrument, comprising a laser projector for projecting a laser beam by rotary irradiation and designed as tiltable, a tilting unit for tilting the laser projector, a rotating unit for integrally rotating the tilting unit and the laser projector in horizontal direction, a tilt setting unit for tilting the laser projector with respect to the rotating unit and for setting a target tilt angle, a tilt angle detector for detecting tilting of the laser projector, tilt sensors provided on the tilt setting unit in two directions perpendicularly crossing and for detecting horizontal direction, a horizontal angle detector for detecting horizontal rotation angle of the rotating unit, and an arithmetic control unit for controlling rotation angle of the rotating unit based on detection results of the tilt sensors and based on detection results of the horizontal angle detector.

REFERENCES:
patent: 6248989 (2001-06-01), Ohishi
patent: 6493067 (2002-12-01), Kodaira et al.
patent: 6-26861 (1994-02-01), None
patent: 2001-280964 (2001-10-01), None

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