Operation; Outline; Laser Exposure Process - Konica Minolta magicolor 1600W Service Manual

7. Write section (PH section)
7.2

Operation

7.2.1

Outline

• The surface of the photo conductor is irradiated with a laser light and an electrostatic
latent image is thereby formed.
• The polygon mirror has four faces and the machine uses a two-beam array LD to inhibit
the speed of the polygon mirror from increasing.
• The two-beam array LD consists of two LD elements arranged vertically. Two lines are
scanned with two laser beams emitted from these two LD elements through a single face
of the polygon mirror.
Beam A
Beam B
Direction of rotation
of photo conductor
Laser diode
Polygon mirror
7.2.2

Laser exposure process

1. The laser light emitted from the Semiconductor laser strikes the polygon mirror.
2. The polygon mirror with four faces is rotated at high speeds by the polygon motor.
3. The SOS sensor ensures that the laser light emission start timing remains constant
for each line of main scan.
Photo conductor
Return mirror
SOS mirror
20
Beam A
Beam B
Photo
conductor
G1 lens
G2 lens
Return mirror
G2 Lens
G1 Lens
Theory of Operation Ver. 1.0 Nov. 2008
Photo conductor surface
SOS sensor
Semiconductor laser
Polygon mirror
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