Oki MC160MFP, Руководство по обслуживанию

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44292401TH Rev.1
27 /
Oki Data CONFIDENTIAL
COMPOSITION/OPERATION
8. Write section (PH section)
8.1 Composition
8
. Write section (PH section)
8.1 Composition
A034T2C504AA
A034T2C574AA
Return mirror
Polygon mirror
G1 Lens
SOS sensor
Semiconductor laser
G2 lens
SOS mirror
8.2 Operation
8.2.1 Outline
8.2 Operation
8.2.1 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. The machine uses a two-beam array LD to inhibit the
speed of the polygon mirror from increasing because of the decreased number of faces
the polygon mirror has as compared with the conventional models.
• 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.
8.2.2 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.
A034T2E582AA
Photo
cond
u
ctor
Polygon mirror
Laser diode
Beam A
T
w
o lines are
scanned in a single
scan motion.
Photo cond
u
ctor s
u
rface
Direction of rotation of photo cond
u
ctor
Direction of rotation
of photo cond
u
ctor
Beam B
Beam A
Beam B
Ret
u
rn mirror
G2 lens
G1 lens
A034T2C505AA
Photo conductor
Return mirror
SOS mirror
G1 Lens
G2 Lens
Polygon mirror
Semiconductor laser
SOS sensor
8.2.2 Laser exposure process
8.2 Operation
8.2.1 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. The machine uses a two-beam array LD to inhibit the
speed of the polygon mirror from increasing because of the decreased number of faces
the polygon mirror has as compared with the conventional models.
• 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.
8.2.2 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.
A034T2E582AA
Photo
cond
u
ctor
Polygon mirror
Laser diode
Beam A
T
w
o lines are
scanned in a single
scan motion.
Photo cond
u
ctor s
u
rface
Direction of rotation of photo cond
u
ctor
Direction of rotation
of photo cond
u
ctor
Beam B
Beam A
Beam B
Ret
u
rn mirror
G2 lens G1 lens
A034T2C505AA
Photo conductor
Return mirror
SOS mirror
G1 Lens
G2 Lens
Polygon mirror
Semiconductor laser
SOS sensor
8.2 Operation
8.2.1 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. The machine uses a two-beam array LD to inhibit the
speed of the polygon mirror from increasing because of the decreased number of faces
the polygon mirror has as compared with the conventional models.
• 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.
8.2.2 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.
A034T2E582AA
Photo
cond
u
ctor
Polygon mirror
Laser diode
Beam A
T
w
o lines are
scanned in a single
scan motion.
Photo cond
u
ctor s
u
rface
Direction of rotation of photo cond
u
ctor
Direction of rotation
of photo cond
u
ctor
Beam B
Beam A
Beam B
Ret
u
rn mirror
G2 lens
G1 lens
A034T2C505AA
Photo conductor
Return mirror
SOS mirror
G1 Lens
G2 Lens
Polygon mirror
Semiconductor laser
SOS sensor
8.2 Operation
8.2.1 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. The machine uses a two-beam array LD to inhibit the
speed of the polygon mirror from increasing because of the decreased number of faces
the polygon mirror has as compared with the conventional models.
• 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.
8.2.2 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.
A034T2E582AA
Photo
cond
u
ctor
Polygon mirror
Laser diode
Beam A
T
w
o lines are
scanned in a single
scan motion.
Photo cond
u
ctor s
u
rface
Direction of rotation of photo cond
u
ctor
Direction of rotation
of photo cond
u
ctor
Beam B
Beam A
Beam B
Ret
u
rn mirror
G2 lens G1 lens
A034T2C505AA
Photo conductor
Return mirror
SOS mirror
G1 Lens
G2 Lens
Polygon mirror
Semiconductor laser
SOS sensor