Coherent beam scanner having a planar hologram illuminated by a convergent or divergent beam

摘要

A coherent beam scanner provides a scan along a straight line by using a linearly moving planar hologram illuminated with a convergent or divergent beam. The hologram is formed by a first beam divergent from a first point on one side of the hologram and a second beam that is coherent with the first beam and convergent at a second point on the other side of the hologram; preferably, the beam axes of the first and second beams are made to form a predetermined acute angle with each other.