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:
Oct. 08, 2013
Filed:
May. 20, 2011
Hisayuki Yamanaka, Saitama, JP;
Makoto Kanai, Tokyo, JP;
Masafumi Sueyoshi, Tokyo, JP;
Masaharu Hosoi, Tokyo, JP;
Hisayuki Yamanaka, Saitama, JP;
Makoto Kanai, Tokyo, JP;
Masafumi Sueyoshi, Tokyo, JP;
Masaharu Hosoi, Tokyo, JP;
Tamron Co., Ltd., Saitama-shi, Saitama, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention is directed to provide an enhanced variable power zoom lens that has focusing lens optics reduced in weight so as to relieve of a load on a focusing drive system, and that has its anti-vibration lens optics reduced in both diameter and weight so as to relieve of a load on an anti-vibration drive system and downsize the same. The enhanced variable power zoom lens is adapted to have the foremost or first lens group Gof positive refractivity, the second lens group Gof negative refractivity, the third lens group Gof positive refractivity, the fourth lens group Gof negative refractivity, and the fifth lens group Gof positive or negative refractivity arranged in sequence from a position closer to the object where the fourth lens group Gserves as a focusing lens, and the third lens group Gand the fifth lens group Gtogether move on and along the same cam structure during zooming.