Apparatus to generate a laser beam detect signal

Details Apparatus to generate a laser beam detect signal Apparatus to generate a laser beam detect signal

2005-05-03

2005-05-03

Tran, Huan (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

C347S235000

Reexamination Certificate

active

06888560

ABSTRACT:
An apparatus to generate a laser beam detect signal includes a reflective mirror arranged on a part of an optical path of a laser beam which forms an electrostatic latent image on a photosensitive body, a beam detect lens to focus the laser beam reflected from the reflective mirror, and a printed circuit board having a photo diode sensor to detect the laser beam passed through the beam detect lens, generating the laser beam detect signal to synchronize a starting point of an image formation of the electrostatic latent image. The apparatus to generate a laser beam detect signal also includes a fixing part to secure the beam detect lens on the printed circuit board so that a center of an optical axis of the beam detect lens is aligned with a detection area of the photo diode sensor. Alternatively, the beam detect lens and the photo diode sensor may be integrally formed with each other. As a result, deterioration of printing quality due to errors from part allowance and an assembling process is prevented. Also, since a number of parts is reduced, the assembling process becomes simpler and fabrication costs decrease.

REFERENCES:
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patent: 5737007 (1998-04-01), Kashima et al.
patent: 5886805 (1999-03-01), Park
patent: 6191804 (2001-02-01), Kitagawa et al.
patent: 20030025783 (2003-02-01), Mori
patent: 20040109211 (2004-06-01), Kato
patent: 20040109212 (2004-06-01), Shimomura
Office Action from Chinese Patent Office dated Jul. 9, 2004.

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