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:
Mar. 28, 2006
Filed:
Jul. 19, 2004
Toshihide Nozawa, Hachioji, JP;
Toshihide Nozawa, Hachioji, JP;
Olympus Corporation, Tokyo, JP;
Abstract
An imaging optical system that is of a small-format size yet capable of easily securing a back focus, and an imaging system that incorporates the same has only two lenses, specifically, a first meniscus lens Lconvex on its object side and a second lens Lhaving positive refracting power and a convex surface configured such that the absolute value of the curvature of the object side-surface of the second lens is larger than the absolute value of the curvature of image side-surface of the second lens. An aperture stop S is located on the object side of an image-formation lens arrangement. A first condition concerning the focal length ratio between the first meniscus lens Land the second lens Land a second condition concerning the shape factor of an air lens between the first meniscus lens Land the second lens Lare satisfied.