The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 2008
Filed:
Jun. 01, 2004
Yasumasa Tomita, Tokyo, JP;
Hiroshi Yoshizawa, Kanagawa-ken, JP;
Tetsuya Kimura, Tokyo, JP;
Masato Yokoyama, Kanagawa-ken, JP;
Keiji Okamoto, Kanagawa-ken, JP;
Keiichi Serizawa, Kanagawa-ken, JP;
Yasumasa Tomita, Tokyo, JP;
Hiroshi Yoshizawa, Kanagawa-ken, JP;
Tetsuya Kimura, Tokyo, JP;
Masato Yokoyama, Kanagawa-ken, JP;
Keiji Okamoto, Kanagawa-ken, JP;
Keiichi Serizawa, Kanagawa-ken, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes an image bearing member having a photosensitive surface and an optical writing apparatus generating a laser beam modulated according to image data. The optical writing apparatus includes a housing, an optical deflector, an f-theta lens and a separator. The optical deflector is configured to rotate to deflect the laser beam. The f-theta lens is configured to correct the laser beam deflected by the optical deflector and to transmit a corrected laser beam towards the image bearing member. The separator is configured to separate an inside space of the housing into at least two sections including a first section in which the optical deflector is mounted and a second section in which the f-theta lens is mounted. The separator includes a heat resistant transparent plate disposed at a position of crossing passage of the laser beam between the optical deflector and the f-theta lens.