Invention Grant
- Patent Title: Zoom lens system
- Patent Title (中): 变焦镜头系统
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Application No.: US13299396Application Date: 2011-11-18
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Publication No.: US08576494B2Publication Date: 2013-11-05
- Inventor: Shinichiro Yakita
- Applicant: Shinichiro Yakita
- Applicant Address: JP
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP
- Agency: Rossi, Kimms & McDowell LLP
- Priority: JP2010-260974 20101124
- Main IPC: G02B15/14
- IPC: G02B15/14 ; H04N5/262
Abstract:
A zoom lens system includes a first unit having a positive refractive power, a second unit having a negative refractive power that moves for magnification-varying, a third unit having one of a positive refractive power and a negative refractive power that moves for magnification-varying, and a fourth unit having a positive refractive power.
Public/Granted literature
- US20120127587A1 ZOOM LENS SYSTEM Public/Granted day:2012-05-24
Information query
