Invention Grant
US08532477B2 Lens control device having lens position control function for bringing, method of controlling the same, and storage medium 有权
具有透镜位置控制功能的透镜控制装置,其控制方法和存储介质

  • Patent Title: Lens control device having lens position control function for bringing, method of controlling the same, and storage medium
  • Patent Title (中): 具有透镜位置控制功能的透镜控制装置,其控制方法和存储介质
  • Application No.: US13015841
    Application Date: 2011-01-28
  • Publication No.: US08532477B2
    Publication Date: 2013-09-10
  • Inventor: Yusuke Kazami
  • Applicant: Yusuke Kazami
  • Applicant Address: JP Tokyo
  • Assignee: Canon Kabushiki Kaisha
  • Current Assignee: Canon Kabushiki Kaisha
  • Current Assignee Address: JP Tokyo
  • Agency: Cowan, Liebowitz & Latman, P.C.
  • Priority: JP2010-022090 20100203
  • Main IPC: G03B17/00
  • IPC: G03B17/00
Lens control device having lens position control function for bringing, method of controlling the same, and storage medium
Abstract:
A lens control device which is capable of controlling lens positions such that an in-focus state of an object image can be maintained even when a variable power lens is positioned outside a normal zoom range from a wide-angle end to a telephoto end. A flash memory stores a positional relationship between the variable power lens and a focus lens, on an object distance-by-object distance basis. A system controller controls the movement of the focus lens by calculating the in-focus position of the focus lens with respect to the position of the variable power lens based on the positional relationship stored in the flash memory when the variable power lens is moved to a position outside the normal zoom range defined in the positional relationship stored in the flash memory.
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