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US08387884B2 Variable focus imaging lens assembly for an imaging-based bar code reader 有权
用于基于成像的条形码读取器的可变焦距成像透镜组件

  • Patent Title: Variable focus imaging lens assembly for an imaging-based bar code reader
  • Patent Title (中): 用于基于成像的条形码读取器的可变焦距成像透镜组件
  • Application No.: US11756052
    Application Date: 2007-05-31
  • Publication No.: US08387884B2
    Publication Date: 2013-03-05
  • Inventor: Igor Vinogradov
  • Applicant: Igor Vinogradov
  • Applicant Address: US NY Holtsville
  • Assignee: Symbol Technologies, Inc.
  • Current Assignee: Symbol Technologies, Inc.
  • Current Assignee Address: US NY Holtsville
  • Agent Nong-Qiang Fan
  • Main IPC: G06K7/10
  • IPC: G06K7/10
Variable focus imaging lens assembly for an imaging-based bar code reader
Abstract:
A variable focus imaging lens assembly (50) for an imaging-based bar code reader (10) including: a lens assembly (52) focusing light from a field of view (FV) onto a sensor array (28), the lens assembly (52) including a lens (53) movable along a path of travel; a drive mechanism (58) to drive the moving lens (53); a focusing system (60) for establishing a reference point (RP) for the moving lens (53) along the path of travel corresponding to a reference focal plane (RFP) within the field of view; and a projection assembly (62) projecting a virtual target image (64a) of a reference target light source (64) to a predetermined position (P) within the field of view and coincident with the reference focal plane (RFP), the predetermined position (P) being a known distance (D) from the lens assembly (52) along its optic axis (OA).
Abstract(Chinese):

一种用于基于成像的条形码读取器（10）的可变焦点成像透镜组件（50），包括：将来自视场（FV）的光聚焦到传感器阵列（28）上的透镜组件（52），所述透镜组件 52）包括可沿行进路径移动的透镜（53）; 用于驱动所述移动透镜的驱动机构（58）; 聚焦系统（60），用于沿与所述视场内的参考焦平面（RFP）相对应的行进路径建立用于所述移动透镜的参考点（RP）; 以及将参考目标光源（64）的虚拟目标图像（64a）投影到视场内的预定位置（P）并与参考焦平面（RFP）一致的投影组件（62），该预定位置 （P）是从透镜组件（52）沿其光轴（OA）的已知距离（D）。

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