发明授权
- 专利标题: Automatic focusing apparatus of camera
- 专利标题(中): 相机自动聚焦装置
-
申请号: US384820申请日: 1989-07-25
-
公开(公告)号: US4933700A公开(公告)日: 1990-06-12
- 发明人: Kei Ikeda , Tsutomu Narisawa , Yasuaki Ishiguro , Masao Owashi
- 申请人: Kei Ikeda , Tsutomu Narisawa , Yasuaki Ishiguro , Masao Owashi
- 申请人地址: JPX Tokyo
- 专利权人: Nikon Corporation
- 当前专利权人: Nikon Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX63-187748 19880727; JPX63-229674 19880912; JPX63-289695 19881115
- 主分类号: G02B7/36
- IPC分类号: G02B7/36
摘要:
An automatic focusing apparatus of a camera includes a detecting unit, a lens driving unit, an instruction output unit, and a control unit. The detecting unit forms pieces of information concerning focus conditions of a photographic lens with respect to at least three areas in a field. The lens driving unit drives the photographic lens in order to perform focusing. The instruction output unit outputs an instruction for changing the position of the photographic lens. On the basis of the information from the detecting unit, the control unit controls the lens driving unit such that the photographic lens is focused on one of the areas in response to a release operation and the instruction and then sequentially focused on the remaining areas in accordance with a predetermined sequence.