Exposure - Oki B6100 Technical Manual

Principles of Operation

2. Exposure

The Raster Output Scanner (ROS) generates an invisible beam of cohesive light, called a laser beam.
Image data received from the print controller modulates this beam, turning it on and off according to
image information.
Through the use of a series of rotating and stationary mirrors within the ROS Assy, the beam scans the
negative charged drum surface. Whenever the print controller sends a command to print a black pixel,
the laser switches on long enough to shine onto the drum at a single pixel point. That point is now dis-
charged and slightly less negative, relative to the surrounding negative charge.
13-6 OKI B6100 Laser Printer - Base Engine Technical Manual
Version 1.0