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:
Jun. 27, 2017
Filed:
Aug. 05, 2015
Applicant:
Yoshifumi Sudoh, Saitama, JP;
Inventor:
Yoshifumi Sudoh, Saitama, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/64 (2006.01); G02B 15/14 (2006.01);
U.S. Cl.
CPC ...
G02B 9/64 (2013.01); G02B 15/14 (2013.01);
Abstract
An image forming lens is formed by sequentially arranging, from an object side to an image side, a first lens group having positive power, an aperture stop, a second lens group having positive power, and a third lens group having positive power. The image forming lens satisfies following conditional expressions:0.95<12/<1.2,0.0<3<0.2,−0.5<(142+211)/(142−211)<−0.2, where