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:
Feb. 08, 2005
Filed:
Dec. 23, 2002
Applicants:
Yasuhiro Kondo, Nagoya, JP;
Kazuyoshi Yamada, Kasugai, JP;
Inventors:
Yasuhiro Kondo, Nagoya, JP;
Kazuyoshi Yamada, Kasugai, JP;
Assignee:
Elmo Company, Limited, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B015/14 ; G02B009/04 ; G02B013/04 ;
U.S. Cl.
CPC ...
Abstract
A wide-angle lens system having a long back focal length, disposed in front of a ⅓″ CCD camera and the focal length (f) for all lens groups is 3.0 mm, the F-number is 3.0 and the half-field angle is 46°. The following conditions are met by the first lens group: 1≦d/d<1.2; R/R=0.99; and d/f=0.03. Here, (d) indicates the thickness of the second lens along the normal line at a given distance from the optical axis within the maximum effective diameter of the object side convex surface of the lens. dis the thickness of the second lens along the optical axis.