Patent ID: 6011613
Filing Date: 2000-01-04
Classification: G01C,G01S

Abstract:
A laser survey instrument, comprising at least a main unit for emitting a laser beam and an object reflector for reflecting the laser beam from the main unit toward the main unit, wherein said object reflector has a reflection surface by which the position can be discriminated, and said main unit comprises an emitter for emitting the laser beam, a rotating unit for irradiating the laser beam to form a laser plane, a tilting mechanism for tilting said rotating unit at an arbitrary angle at least in one direction and for tilting the laser plane, a reflection light detector for detecting reflection light object reflector, a position discriminator for detecting the tilting deviation of the irradiated laser beam with respect to the object reflector based on signals from said reflection light detector, and a controller for controlling the tilting mechanism to correct said tilting deviation based on the detection of the position discriminator.