Panasonic DP-1510P, Service Manual

Page: 328 / 486

328
APR 2002
Edition 2.0
DP-1510P/1810P
/1810F/2010E
6.4.3. Laser Unit
1. Laser
This Laser uses the semiconductor laser. The beam power on the drum surface is approximately 0.20
mW.
2. Collimator Lens
This lens converges and focuses the laser beam, converting it to parallel light.
3. Aperture
This controls the size of the laser beam.
4. Polygon Mirror and Polygon Motor
The polygon scanner consists of a 6-sided mirror, directly driven by a DC motor, revolving at 24,000
rpm. The laser beam is reflected against these mirrors and swept over the recorded width in the
scanning direction.
5. Beam Detection (BD) Lens and Beam Detection (BD) Sensor
The BD Lens receives the reflected light from the Polygon Mirror and redirects it into the BD Sensor,
which converts the laser beam into electrical signals and sets the start timing for the scanning line.
6. F-
θ
Lens
This amorphous plastic, molded lens is designed to provide parallel laser light across the surface of the
drum, providing a constant scanning speed.
7. Lens
This corrects the skew of each side on the Polygon Mirror.
LSU
Lens
LSU Chassis
F Lens
Collimator Lens
Beam Detection Sensor
Beam Detection
Lens
Beam Detection
Reflection Mirror
Collimator Lens
Aperture
Polygon Mirror /
Polygon Motor
Laser