Lexmark C720 Service Manual - Page 65
Details of the Optical System, mirror and lens. The electrostatic latent images are formed on
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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 1 Laser unit: laser diode light emitting source 2 Cylinder lens: laser beam condenser 3 Polygon mirror: hexahedral mirror that reflects the laser beam 4 F-lens: laser beam focus lens 5 Scanner motor: rotates the polygon mirror General Information 1-35
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General Information
1-35
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
1
Laser unit: laser diode light emitting source
2
Cylinder lens: laser beam condenser
3
Polygon mirror: hexahedral mirror that reflects the laser
beam
4
F-lens: laser beam focus lens
5
Scanner motor: rotates the polygon mirror