Use of Dichroic Beam Splitters to Combine Beams From Independent Lasers in a Multiple Beam Aperture Imaging Printhead for Electrophotographic Printers
Original Publication Date: 1989-Jan-01
Included in the Prior Art Database: 2005-Jan-29
High pel, moderate speed electrophotographic printers will employ multiple independently packaged diode lasers to print at speeds above those possible with single lasers. The beams need to be combined using an optical system that employs beam-splitters and lenses as well as apertures to define the individual resolution spots. While two beams may be combined without loss of power using a polarization selective beam splitter, combining a greater number of laser beams requires some invention.