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Fovea-centered eye fundus scanner

机译:以中央凹为中心的眼底扫描仪

摘要

An apparatus and method are described for identifying individuals through the ocular reflectance pattern from the fundus of the eye. A fixation target (34) is provided for positioning and focusing the eye of an individual along its visual axis (10), centered on the fovea of the eye. An infrared source (40) provides a substantially collimated source beam (26) of infrared radiation. A scanner (57) directs the infrared radiation into the fixated eye from a plurality of sequential angularly divergent positions forming a substantially circular locus of points substantially centered on the fovea. The light is reflected in part out of the eye and forms a reflected beam. A detector (80) measures the intensity of the radiation reflected from the eye at each sequential location, the intensities being recorded as an identification pattern. At a later date the eye may be presented again to the apparatus in a different rotational position about its visual axis and another pattern generated. The two patterns will be substantially the same, varying only in the relative start points of the data sequences. One pattern may be rotated with respect to the other pattern to ascertain that the two patterns match, thus verifying the identity of the individual.
机译:描述了一种用于通过来自眼底的眼反射图案来识别个体的设备和方法。提供了一个固定目标(34),用于沿着眼睛的中央凹定位并沿着其视轴(10)定位和聚焦个人的眼睛。红外源(40)提供基本上准直的红外辐射源束(26)。扫描仪(57)将红外辐射从多个连续的角度发散位置引导到注视的眼睛中,这些位置形成基本在中央凹中心的点的基本圆形轨迹。光从眼睛中部分反射出来并形成反射光束。检测器(80)在每个顺序位置测量从眼睛反射的辐射的强度,该强度被记录为识别图案。在稍后的日期,眼睛可以在围绕其视轴的不同旋转位置再次呈现给设备,并产生另一种模式。这两种模式将基本相同,仅在数据序列的相对起始点不同。一个模式可以相对于另一模式旋转,以确定两个模式匹配,从而验证个人的身份。

著录项

  • 公开/公告号EP0126549A3

    专利类型

  • 公开/公告日1986-12-30

    原文格式PDF

  • 申请/专利权人 EYE-D DEVELOPMENT II LTD.;

    申请/专利号EP19840302658

  • 发明设计人 HILL ROBERT BRIAN;

    申请日1984-04-18

  • 分类号A61B3/14;A61B5/10;

  • 国家 EP

  • 入库时间 2022-08-22 07:16:06

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