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:
Sep. 10, 2002
Filed:
Sep. 22, 2000
Satoshi Dou, Tsurugashima, JP;
Milestone Co., Ltd., Tokyo, JP;
Abstract
An image pickup lens system includes a first lens, a stop, and a second lens arranged in a row from an object side to an image side. The first lens is a meniscus resin lens having negative power and oriented such that a convex surface thereof faces the object side. The second lens is a meniscus resin lens having positive power and oriented such that a convex surface thereof faces the image side. The image pickup lens system has at least two aspheric lens surfaces such that the first lens has at least one aspheric surface and such that the second lens has at least one aspheric surface, and is configured so as to satisfy conditions represented by: 3.2f≦|r |≦50f; 0.9f≦d≦1.5f; and 0.1<|f |/|f |<0.9; where f is focal length of the image pickup lens system; f is focal length of the first lens; f is focal length of the second lens; d is distance between the convex surface of the first lens and the convex surface of the second lens (overall length of the image pickup lens system); and r is radius of curvature of a concave surface of the second lens facing the object side.