Laser line beam emitting apparatus having functions of emission of a straight laser line beam therefrom into the area at the wide-angle, and a method thereof

An apparatus for emitting a laser line beam onto objectives therearound comprising:

• at least two pointer units which comprise first and second pointer units, the first and second pointer units, the first and second pointer units for emission of respective first and second laser beams each having a laser beam source from which a laser beam is emitted, and a collimator lens through which the emitted laser beam from the laser beam source is collimated,
• said first and second pointer units arranged such that said first and second collimated, emitted laser beams cross each other at a predetermined point;
• and
• a cylindrical lens through which said first and second collimated laser beams are diffused, the cylindrical lens being arranged in said predetermined point such that said first and second collimated, emitted laser beams lie at least at a right angle to a longitudinal axis of the cylindrical lens, the first and second laser beams being diffused from said predetermined point in the opposite directions from each other, the diffused first laser beam in combination with the second laser beam providing formation of a straight laser line beam emitted and drawn onto said objectives without a discontinuity, in an area around a predetermined angle from the horizontal or the central axes thereof.