Optical beam scanning device, image forming apparatus and lens

Details Optical beam scanning device, image forming apparatus and lens Optical beam scanning device, image forming apparatus and lens

2005-08-05

2008-12-23

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C347S259000

Reexamination Certificate

active

07468823

ABSTRACT:
An optical beam scanning device of the invention includes a single light deflection device, a pre-deflection optical system which causes a light beam emitted from a light source to be incident to the light deflection device, and a post-deflection optical system which images the light beam, reflected from the light deflection device, onto a scanned surface. In the optical beam scanning device, an alignment surface to which the lens is fitted is located near a main scanning direction line passing through a midpoint of a maximum section thickness of the lens in at least one lens in one or the plurality of lenses constituting the post-deflection optical system.

REFERENCES:
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Beiser, L., “Laser Scanning Notebook,” SPIE Optical Engineering Press, Nov. 1992.

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