Details Of The Optical System - Lexmark C720 Service Manual

5024-001

Details of the Optical System

In the optical system process, the printer utilizes a semiconductor
laser diode as a light source. This laser diode is controlled by fast
switching which matches the transmitted image data (video signal).
The generated laser light scans the OPC belt through a polygon
mirror and lens. The electrostatic latent images are formed on the
OPC belt.
The Optical printhead unit consists of following parts:
No. Description
Laser unit: laser diode light emitting source
1
Cylinder lens: laser beam condenser
2
Polygon mirror: hexahedral mirror that reflects the laser
3
beam
F-lens: laser beam focus lens
4
Scanner motor: rotates the polygon mirror
5
General Information
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