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. 26, 2002
Filed:
Sep. 13, 2000
Katsuhisa Tsutsumi, Kawagoe, JP;
Fuji Photo Optical Co., Ltd., Omiya, JP;
Abstract
An attachment lens for attachment to the object side of a main camera lens in order to enable the taking of short distance shots is disclosed. The attachment lens consists of three lens elements of positive, negative, and positive refractive power, in order from the object side. The first lens element and the second lens element are coupled to form a single component. The first lens element has a convex surface on the object side. The second lens element can be of meniscus shape with its convex surface on the object side, plano-concave, or biconcave so long as its curvature matches the image side of the first lens element so that the first lens element and the second lens element may be coupled together to form a single component. Preferably, one or more specified conditions are satisfied in order maintain favorable correction of aberrations.