Photodetector for use in reading optical information symbols
    1.
    发明授权
    Photodetector for use in reading optical information symbols 失效
    用于读取光学信息符号的光电检测器

    公开(公告)号:US5506392A

    公开(公告)日:1996-04-09

    申请号:US314519

    申请日:1994-09-28

    IPC分类号: G06K7/015 G06K7/10 G06K7/14

    摘要: A bar code reader capable of working over a wider range of working angle and for a wider range of bar code densities, using improved optics and sensing elements. The optics and sensing elements and/or the associated circuitry are arranged to provide two channels of data derived from the scanned bar code. The two channels have differing resolutions. Analysis of the data from the two channels provides a single decoded result. As the working angle and density vary at least one of the resolutions will be appropriate for sensing all or most of the bar coded data. The data from the channel producing a valid result can be used, or if neither channel produces a valid result by itself, data from each channel can be analyzed and valid portions of the data from both channels combined to produce the single decoded result. The different resolution of the two channels can be provided using different size photodetection areas, e.g., small and large groups of active areas on a sensor array.

    摘要翻译: 使用改进的光学元件和传感元件,能够在更宽范围的工作角度和更宽范围的条形码密度下工作的条形码阅读器。 光学和感测元件和/或相关联的电路被布置成提供从扫描的条形码导出的两个通道的数据。 两个通道具有不同的分辨率。 来自两个通道的数据的分析提供单个解码结果。 由于工作角和密度变化,分辨率中的至少一个将适合于感测所有或大部分条形码数据。 可以使用来自产生有效结果的信道的数据,或者如果两个信道本身都没有产生有效结果,则可以分析来自每个信道的数据,并且将来自两个信道的数据的有效部分组合以产生单个解码结果。 可以使用不同尺寸的光电检测区域(例如传感器阵列上的小和大的有效区域组)来提供两个通道的不同分辨率。

    Wand readers
    2.
    发明授权
    Wand readers 失效
    魔杖读者

    公开(公告)号:US5352922A

    公开(公告)日:1994-10-04

    申请号:US109021

    申请日:1993-08-19

    摘要: The method and apparatus of this invention facilitate operation of a bar code reader over a wider range of working angle and for a wider range of bar code densities. The invention includes improved optics and sensing elements. The optics and sensing elements and/or the associated circuitry are arranged to provide two channels of data derived form the scanned bar code. The two channels have differing resolutions. Analysis of the data from the two channels provides a single decoded result. As the working angle and density vary at least one of the resolutions will be appropriate for sensing all or most of the bar coded data. The data from the channel producing a valid result can be used, or if neither channel produces a valid result by itself, data from each channel can be analyzed and valid portions of the data from both channels combined to produce the single decoded result.

    摘要翻译: 本发明的方法和装置便于在更宽范围的工作角度和更宽范围的条形码密度下操作条形码阅读器。 本发明包括改进的光学和感测元件。 光学和感测元件和/或相关联的电路被布置成提供从扫描的条形码导出的两个数据通道。 两个通道具有不同的分辨率。 来自两个通道的数据的分析提供单个解码结果。 由于工作角和密度变化,分辨率中的至少一个将适合于感测所有或大部分条形码数据。 可以使用来自产生有效结果的信道的数据,或者如果两个信道本身都没有产生有效结果,则可以分析来自每个信道的数据,并且将来自两个信道的数据的有效部分组合以产生单个解码结果。

    Multi-resolution bar code reader
    3.
    发明授权
    Multi-resolution bar code reader 失效
    多分辨率条码阅读器

    公开(公告)号:US5278397A

    公开(公告)日:1994-01-11

    申请号:US735573

    申请日:1991-07-25

    IPC分类号: G06K7/015 G06K7/10 G06K7/14

    摘要: The method and apparatus of this invention facilitate operation of a bar code reader over a wider range of working angle and for a wider range of bar code densities. The invention includes improved optics and sensing elements. The optics and sensing elements and/or the associated circuitry are arranged to provide two channels of data derived form the scanned bar code. The two channels have differing resolutions. Analysis of the data from the two channels provides a single decoded result. As the working angle and density vary at least one of the resolutions will be appropriate for sensing all or most of the bar coded data. The data from the channel producing a valid result can be used, or if neither channel produces a valid result by itself, data from each channel can be analyzed and valid portions of the data from both channels combined to produce the single decoded result.

    摘要翻译: 本发明的方法和装置便于在更宽范围的工作角度和更宽范围的条形码密度下操作条形码阅读器。 本发明包括改进的光学和感测元件。 光学和感测元件和/或相关联的电路被布置成提供从扫描的条形码导出的两个数据通道。 两个通道具有不同的分辨率。 来自两个通道的数据的分析提供单个解码结果。 由于工作角和密度变化,分辨率中的至少一个将适合于感测所有或大部分条形码数据。 可以使用来自产生有效结果的信道的数据,或者如果两个信道本身都没有产生有效结果,则可以分析来自每个信道的数据,并且将来自两个信道的数据的有效部分组合以产生单个解码结果。

    Optical systems for bar code scanners
    4.
    发明授权
    Optical systems for bar code scanners 失效
    用于条形码扫描仪的光学系统

    公开(公告)号:US5332892A

    公开(公告)日:1994-07-26

    申请号:US812924

    申请日:1991-12-24

    IPC分类号: G06K7/015 G06K7/10 G06K7/14

    摘要: The invention facilitates operation of a bar code reader over a wider range of working angle, a wider range of distances from the bar code and a wider range of bar code densities. The invention includes improved optics and sensing elements. To provide a wider depth of field the optics associated with the emitter and or the photodetector have two distinct focal points. In the preferred embodiments, the optics and sensing elements and/or the associated circuitry are arranged to provide two channels of data derived form the scanned bar code. The two channels have differing resolutions. Analysis of the data from the two channels provides a single decoded result. As the working angle and density vary at least one of the resolutions will be appropriate for sensing all or most of the bar coded data. The data from the channel producing a valid result can be used, or if neither channel produces a valid result by itself, data from each channel can be analyzed and valid portions of the data from both channels combined to produce the single decoded result.

    摘要翻译: 本发明便于在更宽的工作角度范围内进行条形码读取器的操作,与条形码的距离更宽的范围和更宽范围的条形码密度。 本发明包括改进的光学和感测元件。 为了提供更宽的景深,与发射器和/或光电检测器相关联的光学器件具有两个不同的焦点。 在优选实施例中,光学和感测元件和/或相关联的电路被布置成提供从扫描的条形码导出的两个数据通道。 两个通道具有不同的分辨率。 来自两个通道的数据的分析提供单个解码结果。 由于工作角和密度变化,分辨率中的至少一个将适合于感测所有或大部分条形码数据。 可以使用来自产生有效结果的信道的数据,或者如果两个信道本身都没有产生有效结果,则可以分析来自每个信道的数据,并且将来自两个信道的数据的有效部分组合以产生单个解码结果。

    Optical scanners
    6.
    发明授权
    Optical scanners 失效
    光学扫描仪

    公开(公告)号:US06209788B1

    公开(公告)日:2001-04-03

    申请号:US09436468

    申请日:1999-11-08

    IPC分类号: G06K710

    摘要: An optical scanning system is provided for producing a signal representative of a spatial distribution of indicia having different degrees of reflectivity to light, such as a bar code (14). The system includes an optical scanner (12) for scanning beam of light over the spatial distribution of indicia (14) and for producing an electrical signal corresponding to changes in the degree of reflectivity of the indicia. A digitizer (20), responsive to detections in a predetermined characteristic of the produced electrical signal is provided. The digitizer (20) converts the detections into digital words, such digital signals having a plurality of bits. The digitizer includes a timing generation circuit (42) for producing a pulse in response to each one of the detections with a time duration representative of the degree of reflectivity of the indicia as the beam of light. A decoder converts the time duration of the pulse into the digital word having a plurality of bits. An enhancement filter (30) is also disclosed. The enhancement filter (30) modifies pulses produced by a differentiator circuit (24) used in the scanner. Such modification includes increasing the rise time, and peak level of, the pulses produced by the differentiator circuit (24).

    摘要翻译: 提供了一种光学扫描系统,用于产生表示具有不同光反射度的标记的空间分布的信号,例如条形码(14)。 该系统包括用于在标记(14)的空间分布上扫描光束并用于产生对应于标记的反射度的变化的电信号的光学扫描器(12)。 提供了响应于所产生的电信号的预定特性中的检测的数字转换器(20)。 数字转换器(20)将检测转换为数字字,这样的数字信号具有多个位。 数字转换器包括一个定时产生电路(42),用于响应于每个检测产生一个脉冲,时间间隔代表作为光束的标记的反射率。 解码器将脉冲的持续时间转换为具有多个位的数字字。 还公开了增强滤波器(30)。 增强滤波器(30)修改由扫描器中使用的微分电路(24)产生的脉冲。 这种修改包括增加由微分电路(24)产生的脉冲的上升时间和峰值电平。

    Apparatus and method for reading indicia using charge coupled device and scanning laser beam technology
    7.
    发明授权
    Apparatus and method for reading indicia using charge coupled device and scanning laser beam technology 失效
    使用电荷耦合器件和扫描激光束技术读取标记的装置和方法

    公开(公告)号:US06398112B1

    公开(公告)日:2002-06-04

    申请号:US09540404

    申请日:2000-03-31

    IPC分类号: G06K710

    摘要: A scanning device for reading indicia of differing light reflectivity, including bar code or matrix array symbols, has a single light emitter, such as a laser or light emitting diode, for generating a scanning light beam to visually illuminate sequential portions of the indicia. A sensor, such as a charge coupled or other solid state imaging device, simultaneously detects light reflected from portions of the indicia and generates an electrical signal representative of the spacial intensity variations the portions of the indicia. The scanning device may also include an ambient light sensor, and a second light emitter for use only in aiming or orienting the scanning device. A photodetector may also be provided to separately detect one symbol virtually simultaneous with the detection of another symbol by the sensor or to provide dual modalities. A method for reading indicia is also provided.

    摘要翻译: 用于读取不同光反射率的标记(包括条形码或矩阵阵列符号)的扫描装置具有用于产生扫描光束以目视照亮标记的顺序部分的单个光发射器,例如激光或发光二极管。 诸如电荷耦合或其它固态成像装置的传感器同时检测从标记的部分反射的光,并产生代表标记部分的空间强度变化的电信号。 扫描装置还可以包括环境光传感器和仅用于瞄准或定向扫描装置的第二光发射器。 还可以提供光电检测器以与传感器检测另一个符号同时检测一个符号,或提供双重方式。 还提供了读取标记的方法。

    Imaging reader with adaptive focusing for electro-optically reading symbols
    9.
    发明授权
    Imaging reader with adaptive focusing for electro-optically reading symbols 有权
    具有自动对焦功能的电光读取符号的成像读取器

    公开(公告)号:US07905414B2

    公开(公告)日:2011-03-15

    申请号:US12005579

    申请日:2007-12-27

    IPC分类号: G06K7/10 G06K9/22

    摘要: An imaging assembly in an imaging reader for electro-optically reading indicia includes a solid-state imager having an array of image sensors, and a focus control element, such as a liquid imaging lens, having a variable transfer function characteristics for capturing, optically modifying and directing return light from the indicia over a field of view onto the imager for processing into an electrical signal indicative of the indicia during a reading mode of operation; and a controller for controlling the imaging assembly to optically modify the return light in accordance with a known transfer function stored in a memory accessible to the controller during a calibration mode of operation prior to the reading mode.

    摘要翻译: 用于电光学读取标记的成像读取器中的成像组件包括具有图像传感器阵列的固态成像器和诸如液体成像透镜的聚焦控制元件,其具有用于捕获,光学修改的可变传递函数特征 以及将来自所述标记的返回光引导到所述成像器上以在读取操作模式期间处理成指示所述标记的电信号; 以及控制器,用于控制所述成像组件,以在所述读取模式之前的操作校准模式期间,根据存储在所述控制器可访问的存储器中的已知传递函数光学地修改所述返回光。

    Imaging reader with adaptive focusing for electro-optically reading symbols
    10.
    发明申请
    Imaging reader with adaptive focusing for electro-optically reading symbols 有权
    具有自动对焦功能的电光读取符号的成像读取器

    公开(公告)号:US20090166426A1

    公开(公告)日:2009-07-02

    申请号:US12005579

    申请日:2007-12-27

    IPC分类号: G06K7/10

    摘要: An imaging assembly in an imaging reader for electro-optically reading indicia includes a solid-state imager having an array of image sensors, and a focus control element, such as a liquid imaging lens, having a variable transfer function characteristics for capturing, optically modifying and directing return light from the indicia over a field of view onto the imager for processing into an electrical signal indicative of the indicia during a reading mode of operation; and a controller for controlling the imaging assembly to optically modify the return light in accordance with a known transfer function stored in a memory accessible to the controller during a calibration mode of operation prior to the reading mode.

    摘要翻译: 用于电光学读取标记的成像读取器中的成像组件包括具有图像传感器阵列的固态成像器和诸如液体成像透镜的聚焦控制元件,其具有用于捕获,光学修改的可变传递函数特征 以及将来自所述标记的返回光引导到所述成像器上以在读取操作模式期间处理成指示所述标记的电信号; 以及控制器,用于控制所述成像组件,以在所述读取模式之前的操作校准模式期间,根据存储在所述控制器可访问的存储器中的已知传递函数光学地修改所述返回光。