Eduardo Falcon

US Patent:

20050211882, Sep 29, 2005

Filed:

Mar 3, 2005

Appl. No.:

11/070912

Inventors:

Fumio Ohtomo - Itabashi-ku, JP
Kazuki Osaragi - Itabashi-ku, JP
Kunihiro Hayashi - Itabashi-ku, JP
Richard Davidson - Pleasanton CA, US
Clyde Goad - Pleasanton CA, US
Vernon Brabec - Pleasanton CA, US
Eduardo Falcon - Pleasanton CA, US
Richard Jackson - Pleasanton CA, US

International Classification:

H01J040/14
G01C001/00

US Classification:

250221000, 356141500

Abstract:

A laser measuring method in a laser measuring system, which comprises a rotary laser system for projecting a laser beam by rotary irradiation and at least one photodetection system having at least one photodetector for receiving the laser beam, comprising a step of emitting at least two fan-shaped laser beams by the rotary laser system, at least one of the fan-shaped laser beams being tilted, a step of receiving the laser beams at least at three known points by the photodetection system, a step of obtaining elevation angles with respect to the rotary laser system based on photodetection signals which are formed when the photodetector receives the laser beam, and a step of measuring an installing position of the rotary laser system based on elevation angles and position data at the three known points.