Image-forming device and scanning unit for use therein

Details Image-forming device and scanning unit for use therein Image-forming device and scanning unit for use therein

2006-08-29

2006-08-29

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S206100, C359S216100, C347S243000

Reexamination Certificate

active

07099061

ABSTRACT:
A scanning unit for use in an image-forming device includes, for example, four light sources that emit light beams corresponding to yellow, magenta, cyan and black images. The light beams are scanned over the corresponding photosensitive drum with the use of a single polygon mirror and four optical reflection systems each including reflection mirrors. The curved orientation of the scan lines on the photosensitive drum can be equalized for all four light beams by regulating the number of reflection mirrors, that is, by setting the number of reflection mirrors to an even number or an odd number.

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