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:
Aug. 13, 2013
Filed:
Dec. 30, 2011
Hiroyuki Teraoka, Kyoto, JP;
Hiroyuki Teraoka, Kyoto, JP;
AAC Technologies Japan R&D Center, Kyoto, JP;
AAC Acoustic Technologies (Shenzhen) Co., Ltd., Shenzhen, CN;
Abstract
An imaging lens includes, from an object-side to an image-side: an aperture stop, a first lens of positive refractive power with two convex surfaces along the optical axis of the imaging lens, a meniscus second lens of negative refractive power with a convex surface on the object-side, a meniscus third lens of positive refractive power with a convex surface on the image-side, a meniscus fourth lens of negative refractive power with a convex surface on the object-side. Specified conditions are satisfied in order to reduce aberrations and an Fno (focal ratio number) and enhance wide-angle view.