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:
Jan. 10, 2006
Filed:
Dec. 29, 2003
Yasuhiko Abe, Toda, JP;
Yasuhiko Abe, Toda, JP;
Nidec Copal Corporation, Tokyo, JP;
Abstract
The photographing lens of the present invention includes, starting from the object side: an aperture stop having a predetermined aperture; a first lens group having a positive overall refractive power; a second lens group having a positive overall refractive power; and a third lens group having a positive overall refractive power. The first lens group is a cemented lens with, from the object side, a first lens with a positive refractive power and a second lens with a negative refractive power. The second lens group includes a third lens with a positive refractive power and at least one aspherical surface. The third lens group includes a fourth lens with a positive refractive power and at least one aspherical surface. The present invention provides a thin photographing lens for mobile devices with cameras, which has a short total length and an exit angle up to around 20° and corrects various aberrations.