Laser beam apparatus for providing multiple reference beams
US5144486A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1990 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Oct 1, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/144
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.