LAP industrial linelaser are used to show working lines or edges for alignment and positioning.
They may be used to display lines, where material has to be cut, folded, glued, welded or just positionned.
If you use line lasers, you have to take care of the angle between laser beam and surface. Only a line from a laser in exact perpendicular position to the surface doesn't change its position when the distance to the laser changes.
This phenomenom is called parallax error.
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