2 - F - 1
WRITE UNIT
WRITE UNIT
[1] Composition
[2] Mechanisms
Mechanism Method
Scan Polygon mirror
(Rotational speed: 21850 rpm)
(400 dpi standard mode)
Light source Laser diodes (two)
(Output: Max 35 mW)
Positioning Index sensor fine
adjustment prism
Laser beam combining Beam combining prism
*1
*2
*3
OPC drum
Stepping motor
Collimator
lens unit
Cylindrical lens 1
f
θ
lens
2nd mirror
Beam combining prism
Collimator lens
unit 2
Index mirror
Collimator lens unit 1
Cylindrical lens 2
3rd mirror
Polygon mirror
Index sensor board
Laser driver board 1
Polygon driver board
Laser driver board 2
Semiconductor
laser LD1
Compression
prism
Index mirror
Fine adjustment
prism
Beam
combining prism
Compression
prism
CY1 lens
2nd mirror
f
θ
lens unit
CY2 lens
Polygon mirror
3rd mirror
Glass cover
2nd mirror
1st mirror
3rd mirror
Index sensor
Fine adjustment
prism
*1: Path of laser beam
The light output to each semiconductor is sent to the OPC
drum via the collimator lens, compression prism, fine
adjustment prism, beam combining prism, cylindrical lens
1, polygon mirror, fθ lens, 1st mirror, 2nd mirror, cylindrical
lens 2, and the 3rd mirror.
Semiconductor
laser LD2
WRITE UNIT-1
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