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:
Dec. 11, 2001
Filed:
May. 20, 1999
Applicant:
Inventors:
Takatoshi Suzuki, Osaka, JP;
Tingwen Xing, Osaka, JP;
Assignee:
Nippon Aspehrical Lens Co., Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B 1/102 ;
U.S. Cl.
CPC ...
G01B 1/102 ;
Abstract
The present invention has the object to make an fØ lens constituting a scanning optical system such as a laser printer, etc., which is of a single lens configuration, and higher in resolution, thereby providing the f&thgr; lens provided with a lens performance so as to correspond to an A3 paper size or the like. The f&thgr; lens is designed by the aspherical formula as follows: