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1.发明授权Method of programmable digitization and bar code scanning apparatus employing same 失效可编程数字化方法和采用该方法的条码扫描装置
公开(公告)号：US5286960A
公开(公告)日：1994-02-15
申请号：US787534
申请日：1991-11-04
IPC分类号： G06K7/10
CPC分类号： G06K7/10851
摘要： A method and apparatus are provided for detecting bar-space and space-bar transitions in a bar code symbol. A sequence of sparsely sampled analog signals from a photodetector in a bar code scanner is representative of the reflectance pattern of a symbol.Following initialization, a threshold, representing the value of the analog signal at a transition point, is derived from observed samples of the bars and spaces in the bar code symbol. Sampled reflectance information is accumulated as the symbol is scanned, and a program driven microprocessor calculates and repeatedly updates this threshold, using observed maxima and minima in the analog samples, and also referencing a binary output to determine whether a bar or space is currently being viewed.When the values of two successive analog samples bracket this threshold, then a bar-space or space-bar transition has occurred. Linear interpolation is performed on the two samples to determine the transition point and an offset from the first of the two samples. After a delay corresponding to this offset, the level of a binary output is changed. A bit serial binary output is thus produced, representative of the relative widths of bars and spaces.
摘要翻译： 提供了一种用于检测条形码符号中的条形空间和空格键转换的方法和装置。 来自条形码扫描器中的光电检测器的稀疏采样的模拟信号的序列代表符号的反射率图案。 在初始化之后，从条形码符号中的条形和空格的观察样本导出表示转换点处的模拟信号的值的阈值。 扫描符号时累积采样反射信息，并且程序驱动的微处理器使用模拟采样中的观测最大值和最小值来计算并重复更新该阈值，并且还引用二进制输出以确定是否正在查看条形或空间 。 当两个连续的模拟样本的值包含该阈值时，就发生了一个条形空间或空格键转换。 对两个样本执行线性插值，以确定转换点和两个样本中的第一个样本的偏移量。 在与该偏移相对应的延迟之后，二进制输出的电平改变。 因此产生了一个串行二进制输出，代表了条形和空格的相对宽度。
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公开(公告)号：US5430286A
公开(公告)日：1995-07-04
申请号：US202669
申请日：1994-02-25
CPC分类号： G06K7/10702 , G06K7/10594
摘要： There is provided a system of detecting mark-sense indicia wherein the images of a light source and the region of sensitivity of a light sensor are substantially coaxial, coplanar, and coextensive throughout the working depth of field. This system is insensitive to the laminate and the diffusion effects. A light source is aimed at a beam splitter that diverts a portion of the light beam through optics that focus the light on a reflective target containing a bar code symbol to be scanned. The reflected beam is returned through the optics and the beam splitter, and a portion of the reflected beam is conducted to a light sensor. In this manner, the light path from the detector to the optical sensor is split twice by the beam splitter. The optics are configured so that the light beams that define the field of illumination and the region of sensitivity and which pass between the optics and the target are congruent, having identical optical axes and angles of divergence.
摘要翻译： 提供了一种检测标记检测标记的系统，其中光源的图像和光传感器的灵敏度区域在整个工作景深范围内基本上同轴，共面和共延伸。 该系统对层压板和扩散效应不敏感。 光源瞄准分束器，其将一部分光束通过将聚焦在包含待扫描的条形码符号的反射目标上的光的光学器件转向。 反射光束通过光学器件和分束器返回，并且一部分反射光束被传导到光传感器。 以这种方式，从分束器将从检测器到光学传感器的光路分开两次。 光学器件被配置为使得限定照明场和灵敏度区域并且在光学器件和靶之间通过的光束是一致的，具有相同的光轴和发散角。
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公开(公告)号：US5308962A
公开(公告)日：1994-05-03
申请号：US99246
申请日：1993-07-28
CPC分类号： G06K7/10851 , G06K2207/1018
摘要： A scanner is provided for reading a target containing indicia, such as bar codes, which includes a means for directing the a light source so that it illuminates a target, a photodetector that generates an electrical signal indicative of the intensity of the detected light, a means for decoding the electrical signal to identify the presence of a target containing a region of relatively high reflectivity, and a means for modifying the level of illumination of the light source either from low to high upon recognition of said region of relatively high reflectivity or from high to low when some predetermined condition, such as the end of the indicia scan, or the passage of a time period without reading indicia, is met.
摘要翻译： 提供了一种用于读取包含标记的目标的扫描仪，诸如条形码，其包括用于引导光源以使其照亮目标的装置，产生指示检测到的光的强度的电信号的光电检测器， 用于对电信号进行解码以识别包含相对较高反射率的区域的目标的装置，以及用于在识别所述相对较高反射率区域时从低到高修改光源的照明水平的装置，或从 当满足某些预定条件（例如标记扫描的结束）或没有读取标记的时间段的通过时，从高到低。
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4.发明授权
公开(公告)号：US5294783A
公开(公告)日：1994-03-15
申请号：US819448
申请日：1992-01-10
IPC分类号： G06K7/10
CPC分类号： G06K7/1092 , G06K7/10851
摘要： A bar code detection circuit accepts as input the discretized analog output of a CCD array, and performs piecewise linear reconstruction to produces a continuous polylinear output signal. In the region of a bar/space transition, the output signal is a close approximation of the reflectance function of a bar code symbol convolved with the system transfer function of the bar code reader. Linear interpolation is performed in order to determine the offset of a given threshold value from an edge of the CCD analog output.
摘要翻译： 条形码检测电路接受CCD阵列的离散化模拟输出作为输入，并执行分段线性重构以产生连续的多线性输出信号。 在条形/空间转换的区域中，输出信号是与条形码读取器的系统传递函数卷积的条形码符号的反射函数的近似近似值。 执行线性内插以便确定给定阈值与CCD模拟输出边缘的偏移。
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公开(公告)号：US5723868A
公开(公告)日：1998-03-03
申请号：US805739
申请日：1997-02-25
CPC分类号： H01L33/60 , G06K7/10782
摘要： An array of reflectors is arranged to approximately match the arrangement of a two-dimensional array of LEDs such as used in a 2-D bar code scanner. Each reflector has at least one reflecting wall for reflecting light from a respective LED, thus increasing the amount of LED light illuminating the target.
摘要翻译： 反射器阵列布置成近似地匹配诸如用于二维条码扫描器的二维LED阵列的布置。 每个反射器具有至少一个用于反射来自相应LED的光的反射壁，从而增加照射目标的LED光量。
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6.发明授权Integrated solid state light emitting and detecting array and apparatus employing said array 失效集成的固态发光和检测阵列和采用所述阵列的装置
公开(公告)号：US5319182A
公开(公告)日：1994-06-07
申请号：US846471
申请日：1992-03-04
CPC分类号： G06K7/10831 , G06K7/10722 , G06K7/10732 , G06K7/10841 , H01L25/167 , H01L27/156 , H01L31/173 , H01L2924/0002
摘要： There is provided an integrated semiconductor source-detector matrix in which solid state photonic diodes are configured as LEDs, disposed on a substrate and coupled to electronic circuits so that the diodes can be individually driven to emit light or to detect light as may be desired. Providing an integrated matrix of light source (emitter) and light sensor units disposed in close proximity results in each unit having nearly coextensive fields of view and illumination. Apparatus, such as bar code and optical readers utilizing such a matrix are shown, and are insensitive to the diffusion and laminate effects. In alternate embodiments the matrix is coupled to remote sensors or another similar matrix to provide optical communication and interchange devices having high bandwidth.
摘要翻译： 提供了集成半导体源检测器矩阵，其中固态光子二极管被配置为LED，设置在衬底上并耦合到电子电路，使得二极管可以单独驱动以发光或者根据需要检测光。 提供紧密配置的光源（发射器）和光传感器单元的集成矩阵，导致每个单元具有几乎共同的视野和照明。 示出了诸如条形码和利用这种矩阵的光学读取器的装置，并且对扩散和层压效果不敏感。 在替代实施例中，矩阵耦合到远程传感器或另一相似矩阵，以提供具有高带宽的光通信和交换设备。
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7.发明授权Optical assembly and apparatus employing same using an aspherical lens and an aperture stop 失效光学组件和使用非球面透镜和孔径光阑的装置
公开(公告)号：US5291008A
公开(公告)日：1994-03-01
申请号：US819480
申请日：1992-01-10
申请人： William H. Havens , Harry R. McKinley , Charles M. Hammond, Jr. , Joseph J. Morabito , Jeffrey B. Powers
发明人： William H. Havens , Harry R. McKinley , Charles M. Hammond, Jr. , Joseph J. Morabito , Jeffrey B. Powers
IPC分类号： G06K7/10
CPC分类号： G06K7/1092 , G06K2007/10485
摘要： There is disclosed an simplified apparatus that enables optical scanners to achieve minimum field curvature and at the same time provide uniformly distributed light on an image sensor. A single element lens, preferably an aspherical lens made of a plastic material is combined with an aperture stop. The combination is capable of reducing lens aberrations and minimizing image field curvature for an object plane that contains indicia to be scanned or read. A suitably demagnified image of the indicia is focused onto an image sensor such as a CCD array. The spatial light distribution function in the image plane can be equalized by an attenuator, such as a neutral density filter or a slit, suitably configured to compensate for the reduced optical efficiency at large field angles. An aspherical lens containing a dye or a cold mirror can be used for limiting light transmission to a range of wavelengths.
摘要翻译： 公开了一种简化的装置，其使得光学扫描器能够实现最小的场曲率，同时在图像传感器上提供均匀分布的光。 单个元件透镜，优选地由塑料材料制成的非球面透镜与孔径光阑组合。 该组合能够减少包含要扫描或读取的标记的物体平面的透镜像差并使图像场曲率最小化。 标记的适当缩小的图像被聚焦到诸如CCD阵列的图像传感器上。 图像平面中的空间光分布函数可以通过诸如中性密度滤光器或狭缝的衰减器来均衡，该衰减器被适当地配置为补偿在大场角下降低的光学效率。 可以使用包含染料或冷镜的非球面透镜来限制光透射到一定范围的波长。
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公开(公告)号：US5780834A
公开(公告)日：1998-07-14
申请号：US649126
申请日：1996-05-14
申请人： William H. Havens , Charles M. Hammond, Jr. , Robert J. Hennick , Robert C. Hinkley , Robert J. Wood, Sr. , Tanya A. Onori , Thomas W. Karpen
发明人： William H. Havens , Charles M. Hammond, Jr. , Robert J. Hennick , Robert C. Hinkley , Robert J. Wood, Sr. , Tanya A. Onori , Thomas W. Karpen
CPC分类号： H01L33/60 , G06K7/10782
摘要： A low profile optical unit for use in a 2D bar code reader. A vertically disposed light redirecting panel having contoured reflective openings therein is mounted in the front of the unit and an LED behind the panel. Light emitting diodes for illuminating a target are mounted on the LED board behind the contour openings whereby direct light and reflected light illuminates a target. An imager housing is mounted on the back of the LED board and contains a recess that passes through the back of the housing and a lens barrel that extends forward through holes provided in the LED board and the light redirecting panel. An imager board is secured to the back of the housing which holds a 2D imager that is contained within the housing recess. Circuitry for generating image data signals is mounted on the back of the imager board. A lens holder is threadably mounted in the lens barrel which contains a lens system having a short back focal length for focusing a target image on the imager.
摘要翻译： 用于2D条形码阅读器的低调光学单元。 其中具有轮廓反射开口的垂直布置的光重定向面板安装在单元的前部，并且在面板后面安装有LED。 用于照射目标的发光二极管安装在轮廓孔后面的LED板上，由此直射光和反射光照射目标。 成像器壳体安装在LED板的背面，并且包含穿过壳体背面的凹部和通过设置在LED板和光重定向板中的孔向前延伸的透镜镜筒。 成像板被固定到壳体的背面，该背面保持容纳在壳体凹部内的2D成像器。 用于产生图像数据信号的电路安装在成像板的背面。 透镜架螺纹安装在镜筒中，该镜筒包含具有短焦距的透镜系统，用于将目标图像聚焦在成像器上。
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公开(公告)号：US5034619A
公开(公告)日：1991-07-23
申请号：US411325
申请日：1989-09-21
IPC分类号： G06K7/14
CPC分类号： G06K7/14
摘要： An optical reader is designed to be insensitive to specular reflection, particularly at tapered lead-in areas to the left and right of a coded record on a record member. The optical reader includes a photosensor that is oriented with its optical axis along the reader optical center line so as to be situated substantially perpendicular to the record member passing through a reader slot. There are upper and lower LEDs only, which are disposed respectively on opposite sides of the optical center line in a vertical plane. That is, the LEDs lie in a plane perpendicular to the path of a record member being swiped through the slot. In this way, no specular reflection at the lead-in areas will fall onto the photosensor. In addition, the effect of specular reflection occurring at areas of the record member in a plane perpendicular to its path of travel is reduced by a factor of two over an optical reader using a single LED.
摘要翻译： 光学读取器被设计为对镜面反射不敏感，特别是在记录构件上的编码记录的左侧和右侧的锥形导入区域。 光学读取器包括光传感器，光传感器的光轴沿着读取器光学中心线定向，以便基本上垂直于通过读取器槽的记录部件。 仅存在上下LED，分别设置在垂直平面中的光中心线的相对侧。 也就是说，LED处于垂直于记录构件的路径的平面中，该记录构件被通过该槽滑动。 这样，导入区域的镜面反射不会落在光电传感器上。 另外，在使用单个LED的光学读出器上，在垂直于其行进路径的平面中的记录构件的区域处发生镜面反射的影响减小了二倍。
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