Laser Array Printer
Original Publication Date: 1989-Oct-01
Included in the Prior Art Database: 2005-Jan-29
High resolution (/480 dpi) laser printers operate with a single laser diode and a fast rotating polygonal mirror which deflects the laser beam onto the photoconductor drum which then transfers the image via a transcriber and an electrifier onto the paper. Limitations in such a laser printer design are the required high rotating speed of the polygonal mirror and the fairly complicated design of the imaging optics and the scan optics. The printing speeds are in the range of 2 inches per second. This printing speed can be increased by using laser arrays instead of a single laser. However, the optics limit the number of lasers to approximately 4 so that extremely high speeds are not possible.