Process Control
SM 6-51 D014/D015/D078/D079
Detailed
Descriptions
Optical Path
All four latent images (C, M, Y, K) are written at approximately the same time. The laser
diode turn-on times for each color are timed with drum rotation and paper feed. Refer to the
illustration on the previous page. The optical path for each color is as follows:
Cylindrical lens (laser beam correction in each LD unit) (Not shown)
↓
Polygon mirror (main scanning line) 4
↓
Fθ lens (dot position correction)
3
↓
1st Mirror 1
↓
WTL lens (surface distortion correction) 2
↓
2nd Mirror 2
↓
3rd Mirror 3
↓
Dust-shield Glass 10
↓
Drum
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