Invention Grant
- Patent Title: Zoom lens, imaging apparatus, and personal data assistant
- Patent Title (中): 变焦镜头,成像设备和个人数据助理
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Application No.: US12329247Application Date: 2008-12-05
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Publication No.: US07864443B2Publication Date: 2011-01-04
- Inventor: Yoshifumi Sudoh , Hiromichi Atsuumi
- Applicant: Yoshifumi Sudoh , Hiromichi Atsuumi
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Dickstein Shapiro LLP
- Priority: JP2007-317756 20071207; JP2008-079377 20080325
- Main IPC: G02B15/14
- IPC: G02B15/14

Abstract:
A zoom lens includes a first optical system having a positive focal length, the first optical system, a second optical system having a negative focal length, a third optical system having a positive focal length, a fourth optical system having a negative focal length, and a fifth optical system having a positive focal length, which are arranged in order from an object side to an image side and an aperture stop provided at an object side of the third optical system. The following condition is satisfied: 0.5
Public/Granted literature
- US20090147375A1 ZOOM LENS, IMAGING APPARATUS, AND PERSONAL DATA ASSISTANT Public/Granted day:2009-06-11
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