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:
Oct. 20, 1992
Filed:
Nov. 12, 1991
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An optical scanner has a light source device; a lens for converging a laser beam emitted from the light source device; a deflector having a mirror face which is integrally formed with the shaft of a scanner motor and is constructed by one convex spherical or cylindrical mirror face having a radius R and approximately arranged in the vicinity of a center of rotation of the shaft of the scanner motor; and a scanning face scanned by a light beam deflected by the deflector. The optical scanner satisfies a predetermined relation with respect to the radius R when a distance L.sub.O from a deflecting point to the scanning face at an angle of rotation of the deflector set to zero is equal to a distance L from the deflecting point to the scanning face at the angle of rotation of the deflector set to .theta.. The predetermined relation is provided by the following formula: