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. 26, 2008
Filed:
Feb. 22, 2005
Katsu Yamada, Matsubara, JP;
Shusuke Ono, Takatsuki, JP;
Katsu Yamada, Matsubara, JP;
Shusuke Ono, Takatsuki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Provided from the object side are a first lens group () having a positive refracting power and fixed to the image plane, a second lens group () having a negative refracting power and a magnification varying action exhibited when moving along the optical axis, a third lens group () fixed to the image plane and having a positive refracting power, and a fourth lens group () movable along the optical axis so as to maintain the image plane moving with the movements of the second lens group () and of the object in a fixed position from a reference plane. Hence the movement of the image due to camera shake is corrected by moving the whole third lens group () vertically to the optical axis. The size is reduced and the aberrations are small because the whole groups whose optical performance is united are decentered.