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:
Nov. 09, 1999
Filed:
Dec. 31, 1997
Katsumi Shimada, Kanagawa-ken, JP;
Masaru Noguchi, Kanagawa-ken, JP;
Fuji Photo Film Co., Ltd., Kanagawa-ken, JP;
Abstract
In a light beam scanning system, a light beam deflected by a deflector is focused to form an image on a surface and the image is caused to scan the surface at a constant speed. A tilt correcting optical system for compensating for surface tilt in the deflector includes an optical element which is disposed between the deflector and the surface to be scanned and reflects the light beam, deflected by the deflector, to converge on the surface in a direction perpendicular to the direction in which the image scans the surface. The optical element is an in-mirror lens which has a refracting surface at its front face and has a reflecting surface at its rear end face. The refracting surface and the reflecting surfaces are both cylindrical and concave toward the deflector and the radius of curvature of the refracting surface is smaller than that of the reflecting surface.