发明授权
- 专利标题： Internal focus lens
- 专利标题（中）： 内部对焦镜头
-
申请号： US13466380申请日： 2012-05-08
-
公开(公告)号： US08643960B2公开(公告)日： 2014-02-04
- 发明人: Toshihide Hayashi , Naoki Miyagawa
- 申请人： Toshihide Hayashi , Naoki Miyagawa
- 申请人地址： JP Tokyo JP Saitama-shi
- 专利权人： Sony Corporation,Tamron Co., Ltd.
- 当前专利权人： Sony Corporation,Tamron Co., Ltd.
- 当前专利权人地址： JP Tokyo JP Saitama-shi
- 代理机构： Foley & Lardner LLP
- 优先权： JP2011-114188 20110520
- 主分类号： G02B9/14
- IPC分类号： G02B9/14
摘要：
An internal focus lens comprising sequentially from an object side a first lens group having a positive refractive power; a second lens group having a negative refractive power; and a third lens group having a positive refractive power. The second lens group is configured by a simple lens element and is moved along an optical axis to perform focusing. The internal focus lens satisfies condition expressions (1) 0.48
公开/授权文献
- US20120293879A1 INTERNAL FOCUS LENS 公开/授权日：2012-11-22
信息查询
