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:
Jul. 07, 2009
Filed:
Mar. 31, 2008
Youhei Nakagawa, Neyagawa, JP;
Youhei Nakagawa, Neyagawa, JP;
SANYO Electric Co., Ltd., Moriguchi-shi, JP;
Abstract
In a photographing lens unit, an aperture diaphragm, a first lens having positive refractive power, a second lens having negative refractive power, a third lens of a positive meniscus lens with a concave surface on the object side, an ND filter, a fourth lens of a negative meniscus lens with a convex surface on the object side, an IR cut filter, and an imaging element are disposed in order from the object side to the imaging element side. In the third lens, a surface shape on the object side changes from concave to convex as it is away from an optical axis, and a surface shape on the image side changes from convex to concave as it is away from the optical axis. In the fourth lens, a surface shape on the object side changes from convex to concave as it is away from the optical axis.