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. 31, 2017
Filed:
Aug. 15, 2012
Eigo Sano, Hino, JP;
Eigo Sano, Hino, JP;
Konica Minolta, Inc., Tokyo, JP;
Abstract
The present invention provides a compact and high-performance image pickup lens having a fast F-number and capable of suppressing shading by using a curved projection surface. An image pickup lensincludes a first lens Lhaving a positive refractive power, a second lens Lhaving a negative refractive power, a third lens Lhaving a positive or negative refractive power, a fourth lens Lhaving a positive or negative refractive power, and a fifth lens Lhaving a negative refractive power. With regard to the fifth lens Lamong these lenses, at least one surface is aspherical. The above-described image pickup lenssatisfies a conditional expression (1): −2.50<f/f<−0.10 . . . (1) where fis a focal length of the fifth lens Land f is a focal length of the entire system of the image pickup lens