COLLIMATED LIGHT BEAM EXPANDER - COMPRESSOR
Original Publication Date: 1981-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
Present laser diodes radiate energy in cones with elliptical symmetry. When the radiant energy is collimated, the surfaces of equal intensity are cylindrical ellipses. It is often desirable to convert the symmetry of the beam from elliptical to circular prior to collimation. This can be done with a device such as shown in the drawing.