Apparatus and method for projection of reference planes of light

Details Apparatus and method for projection of reference planes of light Apparatus and method for projection of reference planes of light

1987-11-16

1989-06-06

Corbin, John K.

Optics: measuring and testing

Range or remote distance finding

With photodetection

33290, 356138, 356152, G02B 510, G01B 1126

Patent

active

048366692

ABSTRACT:
An apparatus and method project light in two orthogonal planes to provide reference planes of light for use in laying out a construction site or the like. The apparatus comprises a laser light source for providing a source beam of light, and a light diverting arrangement. The light diverting arrangement diverts a first portion of the source beam of light to project a first thin reference fan beam of light substantially in a first reference plane, and diverts a second portion of the source beam of light to project a second thin reference fan beam of light substantially in a second reference plane. The second reference plane is substantially perpendicular to the first reference plane. The apparatus may advantageously be used in laying out a grid.

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