Optical scanning device and image forming apparatus using...

Details Optical scanning device and image forming apparatus using... Optical scanning device and image forming apparatus using...

2008-06-06

2009-11-24

Pham, Hai C (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

C347S250000

Reexamination Certificate

active

07623147

ABSTRACT:
An optical scanning device includes a synchronism detecting element for detecting a light beam scanningly deflected by a deflecting surface of an optical deflector, to determine an image-writing start position of the light beam on a scan surface in a main-scan direction, and a synchronism detecting optical element for directing the light beam scanningly deflected by the optical deflector to the synchronism detecting element, wherein the synchronism detecting optical element is comprised of a prism having a plurality of reflecting surfaces being unified and having a power in a sub-scan direction, and wherein, in a sub-scan section, the prism is configured to place the deflecting surface of the optical deflector and a light-receiving surface of the synchronism detecting element in an optically conjugate relationship with each other.

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