Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
The most common method of scanning a laser beam is with a multifaceted polygon. A multifaceted polygon must be diamond turned in order to get the Dlacement accuracy required from the beam reflected off each facet. Additionally, these systems require an optical system that is insensitive to the remaining pvramidal error of the polygon. A single spinning mirror would eliminate the facet to facet alignment problem but the efficiency (light delivered to target) would decrease dramatically and the motor speed required for the same throughput would increase correspondingly. A two facet scanning device (bigon) represents a compromise solution to this problem. The use of a wide angle lens achieves a scanning efficiency of 50% and a simple alignment procedure eliminates the need for pyramidal error correction.