Laser Scanner Unit - Kyocera KM-1500 Service Manual

2DC

(3-1) Laser scanner unit

1 Laser diode ................................................... Emits diffused, visible laser.
2 Cylindrical lens .............................................. Compensates the vertical angle at which the laser beam hits a polygon
3 Polygon mirror (motor) .................................. Has six mirror segments around its hexagonal circumference; each
4 F-theta lens ................................................... The f-theta lens equalizes focusing distortion on the far ends of the
5 Sensor mirror ................................................ Bends the very first shot of a laser scan towards the beam detection
6 Pin photo sensor ........................................... When shone by the sensor mirror above, this photo-sensor generates
2-1-12
3
4
Diversion mirror
Figure 2-1-12 Laser scanner unit
mirror segment.
mirror corresponding to one scanned line width on the drum when laser
beam scans on it.
drum.
sensor (6).
a trigger signal for the engine controller to start activating the paper
feeding system.
2
5
1
6