Patent ID: 6067152
Filing Date: 2000-05-23
Classification: G01B

Abstract:
A system for checking for correct alignment of a laser beam projecting instrument which projects at least two beams which are orthogonal when the instrument is accurately calibrated, comprising:a base or platform adapted to stably receive the laser beam projecting instrument, in a position such that the instrument projects a collimated laser beam, comprising one of the two orthogonal beams, in an intended general direction,a video sensor in the path of one laser beam from the instrument,at least one mirror in the path of another of the laser beams and positioned such that both laser beams are directed at the video sensor,focusing means in the beam paths between the instrument and the video sensor for focusing the collimated laser beams to small spots at the video sensor,a video monitor connected to the video sensor to display an image of a field of view detected by the video sensor, so that the video monitor displays the position of the laser beams as spots within the sensor's field of view, andreference means providing a reference mark on the video monitor to represent correct alignment of the laser beam,and wherein said reference means include means for generating reference marks for comparison on the video monitor to each of the two beams from the instrument.