Photodetection device for rotary laser system
AssigneeTopcon Corporation
InventorsFumio Ohtomo, Kazuki Osaragi, Kunihiro Hayashi
Life of this patent
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Abstract
A photodetection device for a rotary laser system for projecting at least two fan-shaped beams tilted at a known angle with respect to a horizontal plane and having a known spreading angle, comprising at least three photodetectors arranged in a known relationship.
Claims6
A photodetection device for a rotary laser system for projecting by rotary irradiation at least two fan-shaped beams tilted at a known angle with respect to a horizontal plane and having a known spreading angle, comprising at least three photodetectors arranged in a known relationship, wherein at least one of said photodetectors is provided at a position recessed or protruded by a known distance from a line connecting the remaining at least two photodetectors.
Dependencies are inferred from the claim text.