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:
Feb. 03, 2009
Filed:
Oct. 27, 2005
Masae Sato, Machida, JP;
Eigo Sano, Hino, JP;
Masae Sato, Machida, JP;
Eigo Sano, Hino, JP;
Konica Minolta Opto, Inc., Tokyo, JP;
Abstract
A picture-taking lens for forming an image of an object image on a solid picture-taking element, comprising in order from the object side: a first lens having a positive refractive power and directing a convex surface toward the object side; an aperture stop, a second lens having a positive refractive power and a meniscus shape directing a convex surface toward the image side; and a third lens having a negative refractive power and directing a concave surface toward the image side, wherein the picture-taking lens satisfies the following conditional expression: 0.20<R/f<0.42, 0.10<D/f<0.40, where Ris a radius of curvature of the object side surface of the first lens, Dis an air gap on the axis between the first lens and the second lens, f is a focal length of a whole system of the picture-taking lens.