Optical systems for bar code scanners
    51.
    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。

    CCD-based bar code scanner with optical funnel
    53.
    发明授权
    CCD-based bar code scanner with optical funnel 失效
    基于CCD的条形码扫描器带光漏斗

    公开(公告)号:US5859418A

    公开(公告)日:1999-01-12

    申请号:US591809

    申请日:1996-01-25

    申请人: Yajun Li Joseph Katz

    发明人: Yajun Li Joseph Katz

    IPC分类号: G06K7/10

    CPC分类号: G06K7/10742 G06K7/10732

    摘要: An optical funnel evenly distributes light from an array of LEDs to a bar code. A support member with a central aperture holds the LEDs. A shroud with an angled reflective interior surface spreads the light from the LEDs to the bar code. The funnel also optically isolates the LEDs from the photodector in the scanner.

    摘要翻译: 光学漏斗将LED阵列中的光均匀分布到条形码。 具有中心孔的支撑构件保持LED。 带有倾斜反光内表面的护罩将来自LED的光线分散到条形码。 漏斗还将扫描仪中的光电隔离器光学隔离。

    Photodetector for use in reading optical information symbols
    54.
    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。

    Beam shaping for optical scanners
    56.
    发明授权
    Beam shaping for optical scanners 有权
    光学扫描仪的光束成形

    公开(公告)号:US06633433B2

    公开(公告)日:2003-10-14

    申请号:US09867399

    申请日:2001-05-31

    IPC分类号: G02B2742

    摘要: A beam generator, or beam shaping system, for example for use in an optical scanner, creates a non-Gaussian beam which provides improved indicia-reading characteristics. In one embodiment, diffractive optical elements are used to create a Bessel-Gaussian scanning beam, which comprises a coherent combination of a Gaussian beam and a Bessel beam.

    摘要翻译: 例如用于光学扫描仪的光束发生器或光束成形系统产生提供改进的标记读取特性的非高斯光束。 在一个实施例中,衍射光学元件用于产生贝塞尔 - 高斯扫描光束,其包括高斯光束和贝塞尔光束的相干组合。

    Palm scanner
    57.
    发明授权
    Palm scanner 失效
    棕榈扫描仪

    公开(公告)号:US06412697B1

    公开(公告)日:2002-07-02

    申请号:US09167880

    申请日:1998-10-07

    IPC分类号: G06K710

    摘要: A hand-held optical reader for reading printed indicia on a remote target includes a light source for generating a scanning light beam and a detector for detecting the light reflected from the printed indicia. The light source and detector are housed within a housing having a window through which the light beam passes from the source to the target for reflection from the target to the detector. The housing includes parallel front and rear faces, each being generally rectangular in shape and having a lower portion and upper portion. The front and rear faces are joined by a substantially planar base face at their lower edges. The window is disposed in the front face with the reader being ergonomically configured so as be comfortably held in the hand of a user, with the user's palm adjacent the rear face to enable the user to direct the scanning light beam at a remote target.

    摘要翻译: 用于读取远程目标上的打印标记的手持式光学读取器包括用于产生扫描光束的光源和用于检测从打印标记反射的光的检测器。 光源和检测器容纳在具有窗口的外壳内,光源通过该窗口从源极传递到目标,以从目标到检测器的反射。 壳体包括平行的前表面和后表面,每个前表面和后表面的形状大致为矩形,并具有下部和上部。 前表面和后表面在其下边缘处由基本平坦的基面接合。 窗口设置在正面,读取器符合人体工程学设计,以便舒适地保持在使用者的手中,使用者的手掌靠近后表面,以使用户能够将扫描光束引导到远程目标。

    Optical scanners
    58.
    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。

    Wand readers
    59.
    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。

    Laser scanning device with automatic range and spot size adjustment
    60.
    发明授权
    Laser scanning device with automatic range and spot size adjustment 失效
    激光扫描装置具有自动范围和斑点尺寸调整

    公开(公告)号:US5302812A

    公开(公告)日:1994-04-12

    申请号:US812605

    申请日:1991-12-23

    IPC分类号: G06K7/10

    摘要: A laser scanning head in which the range of the beam waist is varied independently of any measurement of the actual range of the symbol. The optical member is a condenser lens that is moved by energizing a magnetic coil; the lens is operated independently of the scanning movement of the laser beam, to produce a continuous, progressive variation (e.g., a continuous oscillation) in the range of the beam waist, so that at some point in the variation the spot size on the symbol will be of an appropriate size. The movement of the lens can be synchronized with the beam scan (e.g., so that the same spot size can be maintained for several scans). Spot size can be chosen adaptively, by varying the range of the beam waist until the contrast in the reflected light collected from the symbol exceeds a predetermined level.

    摘要翻译: 激光扫描头,其中束腰的范围独立于符号的实际范围的任何测量而变化。 光学构件是通过激励磁线圈而移动的聚光透镜; 透镜独立于激光束的扫描运动而操作,以在光束腰部的范围内产生连续的逐渐变化(例如,连续振荡),使得在变化的某个点处,符号上的光斑尺寸 将具有适当的大小。 透镜的移动可以与光束扫描同步(例如,使得可以为多次扫描保持相同的斑点尺寸)。 通过改变束腰的范围直到从符号收集的反射光中的对比度超过预定水平,可以自适应地选择斑点尺寸。