Laser surveying system

Details Laser surveying system Laser surveying system

2011-06-28

2011-06-28

Smith, R. A. (Department: 2841)

Geometrical instruments

Straight-line light ray type

Level

C033S285000, C356S004010

Reexamination Certificate

active

07966739

ABSTRACT:
A rotary laser projecting device comprising a reference plane forming unit that projects two or more fan-shaped laser beams, a distance measuring unit that projects distance measuring light, a rotator for projecting the fan-shaped laser beams and the distance measuring light by rotary irradiation, a horizontal angle detecting unit, a photodetection unit for receiving the reflected fan-shaped laser beams and the reflected distance measuring light, a storage unit, and a control arithmetic unit is disclosed. The control arithmetic unit measures elevation angle of the object reflector from time difference of photodetection between the two or more laser beams, measures horizontal angle of the object based on the result of detection of the horizontal angle detecting unit when at least one of the reflected fan-shaped laser beams and the reflected distance measuring light is received and the distance measuring unit measures a distance to the object to be measured.

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