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. 29, 2011
Filed:
Feb. 19, 2008
Applicants:
Yusuke Hirao, Sakai, JP;
Keiji Matsusaka, Osaka, JP;
Inventors:
Yusuke Hirao, Sakai, JP;
Keiji Matsusaka, Osaka, JP;
Assignee:
Konica Minolta Opto, Inc., Hachioji-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/04 (2006.01); G02B 3/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
An imaging lens (LN) includes one or two lens blocks (BK), and an aperture stop (ape). The lens block (BK) includes a plane-parallel lens substrate (LS) and a lens (L) formed of different materials. In the imaging lens (LN), a first lens block (BK1) disposed at the most object-side exerts a positive optical power, and a conditional formula defined by the absolute difference between the index of refraction of a first lens substrate (LS1) and the index of refraction of a lens (L[LS1]) contiguous with an object-side substrate surface of the first lens substrate (LS) is fulfilled.