Rotary laser apparatus

Details Rotary laser apparatus Rotary laser apparatus

2008-01-15

2008-01-15

Tarcza, Thomas H. (Department: 3662)

Optics: measuring and testing

Angle measuring or angular axial alignment

Photodetection of inclination from level or vertical

C250S236000, C359S200700

Reexamination Certificate

active

07319515

ABSTRACT:
A rotary laser apparatus includes a light-projection section configured to irradiate at least two fan-shaped beams extending in a fan-shaped form in a direction orthogonal to a rotary axis. The light-projecting section includes a laser beam source for generating a laser beam in a direction of the rotary axis, and a rotation-irradiating section configured for irradiating the laser beam from the laser beam source in directions orthogonal to the rotary axis. The rotation-irradiating section includes a plurality of penta prisms and a beam splitter. The plurality of the penta prisms are arranged in the direction of the rotary axis depending upon the number of the fan-shaped beams such that light-emitting directions of the respective penta prisms differ from each other or one another, and the beam splitter is configured to the laser beam as required the penta prism arranged above.

REFERENCES:
patent: 2003/0136901 (2003-07-01), Ohtomo et al.
patent: 2005/0274879 (2005-12-01), Osaragi et al.
patent: 8-145675 (1996-06-01), None
patent: 2002-527729 (2002-08-01), None
patent: 2003-214852 (2003-07-01), None
Japan Patent Office, Official Action in JP 2004-257242, mailed Jan. 30, 2007, Japan Patent Office, Japan.

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