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. 23, 2009
Filed:
Dec. 23, 2005
Applicant:
Masashi Isono, Hoi-gun, JP;
Inventor:
Masashi Isono, Hoi-gun, JP;
Assignee:
Konica Minolta Opto, Inc., Hachioji-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 17/00 (2006.01); G02B 15/14 (2006.01); G02B 9/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
An aperture stop, a first lens having a positive power, a second lens having a negative power, a third lens having a positive power, and a fourth lens whose concave face is directed toward the image surface side and having a meniscus shape are disposed in order from the object side. The second and third lenses are cemented to each other. Further, focal length 'f' of the entire system and total focal length 'f' of the second and third lenses satisfy the following conditional expression.|23|<0.4