Invention Grant
- Patent Title: Zoom lens and an imaging apparatus incorporating the same
- Patent Title (中): 变焦镜头和包含该变焦镜头的成像装置
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Application No.: US12456460Application Date: 2009-06-16
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Publication No.: US07830613B2Publication Date: 2010-11-09
- Inventor: Keisuke Ichikawa
- Applicant: Keisuke Ichikawa
- Applicant Address: JP Tokyo
- Assignee: Olympus Imaging Corp.
- Current Assignee: Olympus Imaging Corp.
- Current Assignee Address: JP Tokyo
- Agency: Kenyon & Kenyon LLP
- Priority: JP2008-161487 20080620; JP2009-004334 20090113
- Main IPC: G02B5/14
- IPC: G02B5/14

Abstract:
The first lens group comprises a positive lens and a negative lens, and the total number of lenses in the first lens group is 2. The second lens group consists of, in order from the object side, a front unit of negative refracting power and a rear unit of positive refracting power. The third lens group consists of, in order from the object side, a front unit of positive refracting power and a rear unit of negative refracting power. The fourth lens group comprises a positive lens component, and the total number of lens components in the fourth lens group is 1. The front unit of the second lens group comprises a negative lens component, and the total number of lens components in the front unit of the second lens group is 1. The rear unit of the second lens group comprises, in order from the object side to the image side, a negative lens and a positive lens, and the total number of lenses in the rear unit of the second lens group is 2. The negative lens component in the front unit of the second lens group and the negative lens in the rear unit of the second lens group satisfy the following condition (1A): 2.9
Public/Granted literature
- US20090316277A1 Zoom lens and an imaging apparatus incorporating the same Public/Granted day:2009-12-24
Information query