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    • 6. 发明授权
    • Method and means for self-referencing and self-focusing a bar-code reader
    • 条形码阅读器自我参照和自我聚焦的方法和手段
    • US4831275A
    • 1989-05-16
    • US930328
    • 1986-11-12
    • Steven H. Drucker
    • Steven H. Drucker
    • G06K7/015G06K7/10
    • G06K7/10851G06K7/10722G06K7/10811
    • A scanning device and method for reading bar-code or other contrasting marks from a surface at variable distance from the scanning device operates by modulating the focal point of the optical system to yield pulse responses on detected code bars while in focus, and average background response levels from the bar-code surface while out of focus. Modulation of focal point of the optical system is achieved in selected ways such as by positioning optical elements using piezoelectric or electromagnetic drivers or liquid-crystal elements, or by staggering the positions along an optical axis of arrays of optical sensors, or of optical fibers coupled to the sensors.
    • 用于从与扫描装置可变距离的表面读取条形码或其他对比标记的扫描装置和方法通过调制光学系统的焦点以在对焦时在检测到的码条上产生脉冲响应,并且平均背景响应 水平从条形码表面而不在焦点。 以选定的方式实现光学系统的焦点的调制,例如通过使用压电或电磁驱动器或液晶元件定位光学元件,或者通过交错沿着光学传感器阵列的光轴的位置或耦合的光纤 传感器。
    • 7. 发明授权
    • Method and apparatus for self-referencing and self-focusing a bar-code
reader
    • 条形码阅读器自我参照和自动对焦的方法和装置
    • US4818886A
    • 1989-04-04
    • US52762
    • 1987-05-20
    • Steven H. Drucker
    • Steven H. Drucker
    • G06K7/10
    • G06K7/10722G06K7/10811
    • A scanning device and method for reading bar code or other contrasting marks from a surface at a variable distance from the scanning device operates by modulating the focal point of the optical system to yield pulse responses on detected code bars while in focus, and average background response levels from the bar code surface while out of focus. Modulation of focal point of the optical system is achieved in selected ways such as by positioning optical elements using piezoelectric or electromagnetic drivers or liquid-crystal elements, or by staggering the positions along an optical axis of arrays of optical sensors, or of optical fibers coupled to the sensors. The light sources and detectors may be transposed to provide an array of individual light sources that are selectably and rapidly energized at locations in the optical system which provide illumination that is substantially in focus or out of focus on the surface being scanned. The detected reflections from focussed and unfocussed devices are processed to produce output signals representative of the bar-coded data independently of scanning rate and spacing between the scanning device and the bar-coded surface being scanned.
    • 用于从与扫描装置可变距离的表面读取条形码或其他对比标记的扫描装置和方法通过调制光学系统的焦点以在对焦时产生对检测到的码条的脉冲响应,并且平均背景响应 水平从条形码表面而不在焦点。 以选定的方式实现光学系统的焦点的调制,例如通过使用压电或电磁驱动器或液晶元件定位光学元件,或者通过交错沿着光学传感器阵列的光轴的位置或耦合的光纤 传感器。 光源和检测器可以被转置以提供在光学系统中的位置处可选择地且快速地通电的各个光源的阵列,其提供基本上在被扫描的表面上的焦点或焦点上的照明。 来自聚焦和未聚焦的装置的检测到的反射被处理以产生代表条形编码数据的输出信号,而与扫描装置和被扫描的条形编码表面之间的扫描速率和间距无关。
    • 8. 发明申请
    • Illumination Optics for a Visible or Infrared Based Apparatus and Methods for Viewing or Imaging Blood Vessels
    • 用于可见或红外线的装置的照明光学和用于观察或成像血管的方法
    • US20140276088A1
    • 2014-09-18
    • US13843958
    • 2013-03-15
    • Steven H. Drucker
    • Steven H. Drucker
    • A61B5/00
    • A61B5/489A61B5/0077A61B5/0082A61B2562/0233
    • The illumination apparatus and methods described herein increase the depth of the illumination's tissue penetration, help minimize surface reflections and back-scatter for a non-contact camera based imaging system thus providing increased tissue-structure contrast and more information about the structures beneath the surface. It does this by using one or more of the following techniques: using optics to provide radiation which hits the surface at or near 90 degrees for better tissue penetration; using optics and radiation source placement to control the angular distribution of light from surface vertical to minimize surface specular reflection and subsurface reflection; removing some surface light reflection through patterning the intensity of the light source thus increasing contrast in areas of no or low direct irradiation; synchronously with respect to camera frames or through user selection, switching on and off light sources which has the effect of 1) dynamically changing the overall angular distribution of light thus changing surface level reflectance; 2) revealing and through processing removing unwanted patterning caused by optical defects or contaminants on optical surfaces or surface hair; 3) moving illumination patterns to permit contrast enhancement in all areas of the surface.
    • 这里描述的照明装置和方法增加了照明组织穿透的深度,有助于最小化用于非接触照相机的成像系统的表面反射和反向散射,从而提供增加的组织结构对比度和关于表面下方的结构的更多信息。 它通过使用以下一种或多种技术来实现:使用光学器件来提供在90度处或接近90度的表面的辐射,以更好地组织穿透; 使用光学和辐射源放置来控制来自表面垂直的光的角度分布,以最小化表面镜面反射和地下反射; 通过图案化光源的强度去除一些表面光反射,从而增加无或低直接照射的区域中的对比度; 同步相机相框或通过用户选择,打开和关闭光源,其效果是:1)动态地改变光的总角度分布,从而改变表面水平的反射率; 2)显露和通过处理去除由光学表面或表面毛发上的光学缺陷或污染物引起的不需要的图案; 3)移动照明图案,以允许表面所有区域的对比度增强。