| 摘要 |
For purpose of both of reduction in the number of parts that contributes to lower cost, and facilitated adjustment of location of a pair of laser beams for formation of a precise straight line beam drawn on objects in the wide-angle area, there are provided an apparatus and method having an improvement in emission of a laser line beam. The improvement comprises at least two pointer units each having a laser beam source for emission of a laser beam and a collimator lens for collimating the emitted beam, and a cylindrical lens arranged ahead of the units. With an arranged relationship between the pointer units and cylindrical lens, two beam fluxes from respective units cross each other at a point where the cylindrical lens is arranged, wherein the beam fluxes are at right angles to the central axis of the cylindrical lens. The diffused beams form the straight line beam.
|
