发明申请
- 专利标题: IMAGING APPARATUS DETECTING FOREIGN OBJECT ADHERING TO LENS
- 专利标题(中): 检测外观对象与镜头的成像设备
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申请号: US12894904申请日: 2010-09-30
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公开(公告)号: US20110080494A1公开(公告)日: 2011-04-07
- 发明人: Yukio Mori , Kenichi Kikuchi , Wataru Takayanagi
- 申请人: Yukio Mori , Kenichi Kikuchi , Wataru Takayanagi
- 申请人地址: JP Osaka
- 专利权人: SANYO ELECTRIC CO., LTD.
- 当前专利权人: SANYO ELECTRIC CO., LTD.
- 当前专利权人地址: JP Osaka
- 优先权: JP2009-230219 20091002
- 主分类号: H04N5/228
- IPC分类号: H04N5/228
摘要:
An imaging element having an imaging surface on which an optical image of a subject field passing through an optical lens is emitted generates an image signal corresponding to the optical image of the subject field by photoelectric conversion. An aperture mechanism controls an aperture of the optical lens. A shutter controls exposure time for the imaging element. An exposure adjustment unit adjusts an exposure value for the imaging surface based on an evaluation value of brightness of the subject field. A focus adjustment unit adjusts a focus position of the optical lens. A CPU detects a foreign object adhering to the optical lens by performing shooting under a plurality of shooting conditions in which the exposure value and the focus position are identical and aperture values are different from each other, and comparing a plurality of the image signals obtained from the imaging element during the shooting.