Optics: measuring and testing – Angle measuring or angular axial alignment – Photodetection of inclination from level or vertical
Reexamination Certificate
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.
Hayashi Kunihiro
Ohtomo Fumio
Brainard Timothy
Chapman and Cutler LLP
Kabushiki Kaisha Topcon
Tarcza Thomas H.
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