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. 22, 2011
Filed:
Jul. 03, 2007
Satoshi DO, Saitama, JP;
Satoshi Do, Saitama, JP;
Milestone Co., Ltd., Tokyo, JP;
Satoshi Do, Saitama, JP;
Abstract
An imaging lens of which various aberrations are corrected well, optical length is short, and back focus is sufficiently secured, is provided. The imaging lens is formed of a first lens L, an aperture stop S, a second lens Land a third lens L, arranged in this sequence from the object side to the image side. The first lens Lis a meniscus lens having a positive refractive power, of which convex surface faces the object side, the second lens Lis a meniscus lens having a positive or negative refractive power, of which convex surface faces the image side, and the third lens Lis a meniscus lens having a negative refractive power, of which convex surface faces the object side. The Abbe number ν of the second lens Lis a value in a 50.0 to 60.0 range.