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:
Mar. 22, 2011
Filed:
Mar. 12, 2009
Applicant:
Takamasa Sakamoto, Osaka, JP;
Inventor:
Takamasa Sakamoto, Osaka, JP;
Assignee:
Asia Optical Co., Inc., Taichung, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 7/02 (2006.01); G02B 15/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention provides a zoom lens, including a plurality of lens groups. When the zoom lens is in operation, the plurality of lens groups are aligned on a common optic axis, and the zoom lens forms a first plane and a second plane conjugated with the first plane. To retract the zoom lens, at least one of the lens groups is rotated around an axis perpendicular to the common optical axis and toward the first plane, and at least one of the rest of the lens groups is moved toward the second plane along the common optical axis. As a result, overall length of the zoom lens is shortened when it is retracted to obtain the miniaturization.