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:
Apr. 03, 2012
Filed:
Mar. 28, 2007
Satoshi DO, Saitama, JP;
Satoshi Do, Saitama, JP;
Satoshi Do, Saitama, JP;
Milestone Co., Ltd., Chiba, JP;
Abstract
An imaging lens of which optical performance does not deteriorate even in a high temperature environment, various aberrations are well corrected, optical length is short, and back focus is sufficiently secured, comprising an aperture stop S and a junction type compound lenshaving a positive refractive power, wherein the aperture stop and the junction type compound lens are arranged in this sequence from an object side to an image side. The junction type compound lens comprises a first lens L, a second lens Land a third lens Larranged in this sequence from the object side to the image side. The first lens and the third lens are formed of a curable resin material, and the second lens is formed of an optical glass. The first lens and the second lens are directly bonded, and the second lens and the third lens are directly bonded. The object side face of the first lens and the image side face of the third lens are aspherical.