The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 1992
Filed:
Oct. 01, 1990
Edward E Hart, Springfield, OH (US);
Spectra-Physics Laserplane, Inc., Dayton, OH (US);
Abstract
A laser beam projector apparatus is provided and includes a laser tube for producing a primary light beam in an initial path. A first beam diverter is included for diverting a first portion of the primary beam into a first direction to emerge from the apparatus as a first reference beam and for diverting a second portion of the primary beam into a second direction substantially parallel but opposite to the first direction. The apparatus further includes a second beam diverter for intercepting the second portion of the primary beam and allowing a first part of the second portion to pass therethrough and emerge from the apparatus in the second direction as a second stationary reference beam. The second beam diverter further serves to divert a second part of the second portion substantially 90 degrees into a third direction. A rotation mechanism is included for rotating the second beam diverter about an axis which is substantially parallel to the first and second directions so that the second part is directed outwardly from and rotated about the axis to produce a moving reference beam defining a reference plane which is substantially perpendicular to the stationary reference beams.