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:
Jun. 23, 2009
Filed:
Dec. 14, 2007
Mitsuhiro Suzaki, Tokyo, JP;
Yusuke Nanjo, Kanagawa, JP;
Shinichi Arita, Tokyo, JP;
Koji Toyoda, Kanagawa, JP;
Mitsuhiro Suzaki, Tokyo, JP;
Yusuke Nanjo, Kanagawa, JP;
Shinichi Arita, Tokyo, JP;
Koji Toyoda, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
A zoom lens includes, in order from an object side, a first lens group having a positive refractive power and fixed in an optical axis direction, a second lens group having a negative refractive power and moving along an optical axis to zoom, a third lens group having a positive refractive power and fixed in the optical axis direction, and a fourth lens group having a positive refractive power and moving in a non straight line along the optical axis to compensate variations of an image formation position and compensate change of the image formation position caused by changes of an object distance.