Bar code scanner utilizing time-multiplexed scan lines
    1.
    发明授权
    Bar code scanner utilizing time-multiplexed scan lines 失效
    条码扫描器利用时间复用的扫描线

    公开(公告)号:US5912450A

    公开(公告)日:1999-06-15

    申请号:US864452

    申请日:1997-05-28

    IPC分类号: G06K7/10 G06K7/14

    摘要: A bar code reader and method of reading a bar code symbol successively generates scan patterns at different times on the symbol. Preferably, two light sources are alternately energized to alternately produce two scan lines across the symbol. Each scan line reflects light from the symbol. The reflected light is detected by a photodetector which, in turn, generates an electrical signal. This signal is decoded into data corresponding to the symbol.

    摘要翻译: 条形码读取器和读取条形码符号的方法在符号上的不同时间连续地生成扫描图案。 优选地,两个光源交替地通电以交替地跨越符号产生两条扫描线。 每个扫描线反映符号的光。 反射光由光电检测器检测,光电检测器又产生电信号。 该信号被解码成对应于符号的数据。

    Bar code scanner utilizing multiple light beams output by a light beam
splitter
    2.
    发明授权
    Bar code scanner utilizing multiple light beams output by a light beam splitter 失效
    条形码扫描器利用由光束分离器输出的多个光束

    公开(公告)号:US5712470A

    公开(公告)日:1998-01-27

    申请号:US458880

    申请日:1995-06-02

    IPC分类号: G06K7/10 G06K7/14

    摘要: A bar code scanner and method for scanning a bar code symbol that splits a light beam using a liquid crystal device and directs the split light beams toward a bar code symbol using a moveable mirror. The light reflected by the symbol from each of the split light beams is added summed and converted to an electrical signal indicative of the bar code symbol. The electrical signal is processed to decode the bar code symbol and, if the decoding is unsucessful, the liquid crystal device is changed to affect the number of split light beams incident on the bar code symbol.

    摘要翻译: 一种条形码扫描器和方法,用于扫描使用液晶装置分割光束的条形码符号,并使用可移动反射镜将分束光束引向条形码符号。 将来自每个分离光束的符号反射的光相加并相加并转换成指示条形码符号的电信号。 处理电信号以解码条形码符号,并且如果解码不成功,则改变液晶装置以影响入射在条形码符号上的分束光束的数量。

    System for reading a symbol by activitating a liquid crystal device to
control a scanning path
    3.
    发明授权
    System for reading a symbol by activitating a liquid crystal device to control a scanning path 失效
    通过激活液晶装置来控制扫描路径来读取符号的系统

    公开(公告)号:US5663549A

    公开(公告)日:1997-09-02

    申请号:US459467

    申请日:1995-06-02

    IPC分类号: G06K7/10 G06K7/14

    摘要: A bar code scanner employs an electronic means for causing the light beam to scan a bar code symbol, rather than using a mechanical device to generate the scan. A linear array of light sources, activated one at a time in a regular sequence, may be imaged upon the bar code symbol to simulate a scanned beam. Instead of a single linear array of light sources, a multiple-line array may be employed, producing multiple scan lines. The multiple scan lines may be activated in sequence, or activated simultaneously (time-division or frequency-division multiplexed. The multiple scan lines can provide signal enhancement, noise reduction or fault correction if directed to the same bar code pattern. Multiple scan lines may be generated using a single light source and a beam splitter, with mechanical scanning, as well as by the sequentially-activated light sources. Multiple simultaneous scan lines may be employed to generate a raster scan at lower mechanical scan frequency. In another embodiment, a tunable laser may be employed to provide a scan without moving parts; a laser beam from the tunable laser is reflected from a diffraction grating that produces an angular deviation dependent upon the wavelength of the laser output. As the frequency of the tunable laser is varied in some selected pattern, the laser beam will scan accordingly.

    摘要翻译: 条形码扫描仪采用电子装置,用于使光束扫描条形码符号,而不是使用机械装置来产生扫描。 可以在条形码符号上成像一个以规则顺序一次激活的光源的线性阵列,以模拟扫描光束。 代替光源的单个线性阵列,可以采用多行阵列,产生多条扫描线。 多个扫描线可以被顺序激活或同时激活(时分或频分复用,多个扫描线可以提供信号增强,降噪或故障校正,如果指向相同的条形码图案,多个扫描线可以 使用单个光源和分束器,通过机械扫描以及由顺序激活的光源产生多个同时扫描线可以以较低的机械扫描频率产生光栅扫描,在另一个实施例中, 可调谐激光器可用于提供无移动部件的扫描;来自可调谐激光器的激光束从衍射光栅反射,该衍射光栅产生取决于激光输出波长的角度偏差,因为可调激光器的频率在 一些选定的图案,激光束将相应扫描。

    Scan generators for bar code reader using linear array of lasers
    4.
    发明授权
    Scan generators for bar code reader using linear array of lasers 失效
    使用激光线阵列的条形码阅读器的扫描发生器

    公开(公告)号:US5258605A

    公开(公告)日:1993-11-02

    申请号:US864367

    申请日:1992-04-06

    IPC分类号: G06K7/10 G06K7/14 G06K9/22

    摘要: A bar code scanner employs an electronic means for causing the light beam to scan a bar code symbol, rather than using a mechanical device to generate the scan. A linear array of light sources, activated one at a time in a regular sequence, may be imaged upon the bar code symbol to simulate a scanned beam. Instead of a single linear array of light sources, a multiple-line array may be employed, producing multiple scan lines. The multiple scan lines may be activated in sequence, or activated simultaneously (time-division or frequency-division multiplexed. The multiple scan lines can provide signal enhancement, noise reduction or fault correction if directed to the same bar code pattern. Multiple scan lines may be generated using a single light source and a beam splitter, with mechanical scanning, as well as by the sequentially-activated light suorces. Multiple simultaneous scan lines may be employed to generate a raster scan at lower mechanical scan frequency. In another embodiment, a tunable laser may be employed to provide a scan without moving parts; a laser beam from the tunable laser is reflected from a diffraction grating that produces an angular deviation dependent upon the wavelength of the laser output. As the frequency of the tunable laser is varied in some selected pattern, the laser beam will scan accordingly.

    摘要翻译: 条形码扫描仪采用电子装置,用于使光束扫描条形码符号,而不是使用机械装置来产生扫描。 可以在条形码符号上成像一个以规则顺序一次激活的光源的线性阵列,以模拟扫描光束。 代替光源的单个线性阵列,可以采用多行阵列,产生多条扫描线。 多个扫描线可以被顺序激活或同时激活(时分或频分复用,多个扫描线可以提供信号增强,降噪或故障校正,如果指向相同的条形码图案,多个扫描线可以 使用单个光源和分束器,通过机械扫描以及顺序激活的光源产生多个同时扫描线可以以较低的机械扫描频率产生光栅扫描,在另一个实施例中, 可调谐激光器可用于提供无移动部件的扫描;来自可调谐激光器的激光束从衍射光栅反射,该衍射光栅产生取决于激光输出波长的角度偏差,因为可调激光器的频率在 一些选定的图案,激光束将相应扫描。

    Bar code scanner utilizing multiple light beams output by a light beam splitter
    5.
    发明授权
    Bar code scanner utilizing multiple light beams output by a light beam splitter 有权
    条形码扫描器利用由光束分离器输出的多个光束

    公开(公告)号:US06247648B1

    公开(公告)日:2001-06-19

    申请号:US09301633

    申请日:1999-04-29

    IPC分类号: G06K710

    CPC分类号: G06K7/10831

    摘要: A bar code scanner and method for scanning a bar code symbol that splits a light beam using a liquid crystal device and directs the split light beams toward a bar code symbol using a moveable mirror. The light reflected by the symbol from each of the split light beams is summed and converted to an electrical signal indicative of the bar code symbol. The electrical signal is processed to decode the bar code symbol, but, if decoding is unsuccessful, the liquid crystal device is changed to affect the number of split light beams incident on the bar code symbol.

    摘要翻译: 一种条形码扫描器和方法,用于扫描使用液晶装置分割光束的条形码符号,并使用可移动反射镜将分束光束引向条形码符号。 从每个分束光束的符号反射的光被相加并转换成指示条形码符号的电信号。 处理电信号以解码条形码符号,但是如果解码不成功,则改变液晶装置以影响入射在条形码符号上的分束光束的数量。

    Barcode scanner using an array of light emitting elements which are
selectively activated
    6.
    发明授权
    Barcode scanner using an array of light emitting elements which are selectively activated 失效
    条形码扫描器,其使用选择性地激活的发光元件阵列

    公开(公告)号:US5545886A

    公开(公告)日:1996-08-13

    申请号:US98991

    申请日:1993-07-29

    IPC分类号: G06K7/10 G06K7/14

    摘要: A bar code scanner employs an electronic means for causing the light beam to scan a bar code symbol, rather than using a mechanical device to generate the scan. A linear array of light sources, activated one at a time in a regular sequence, may be imaged upon the bar code symbol to simulate a scanned beam. Instead of a single linear array of light sources, a multiple-line array may be employed, producing multiple scan lines. The multiple scan lines may be activated in sequence, or activated simultaneously (time-division or frequency-division multiplexed. The multiple scan lines can provide signal enhancement, noise reduction or fault correction if directed to the same bar code pattern. Multiple scan lines may be generated using a single light source and a beam splitter, with mechanical scanning, as well as by the sequentially-activated light sources. Multiple simultaneous scan lines may be employed to generate a raster scan at lower mechanical scan frequency. In another embodiment, a tunable laser may be employed to provide a scan without moving parts; a laser beam from the tunable laser is reflected from a diffraction grating that produces an angular deviation dependent upon the wavelength of the laser output. As the frequency of the tunable laser is varied in some selected pattern, the laser beam will scan accordingly.

    摘要翻译: 条形码扫描仪采用电子装置,用于使光束扫描条形码符号,而不是使用机械装置来产生扫描。 可以在条形码符号上成像一个以规则顺序一次激活的光源的线性阵列,以模拟扫描光束。 代替光源的单个线性阵列,可以采用多行阵列,产生多条扫描线。 多个扫描线可以被顺序激活或同时激活(时分或频分复用,多个扫描线可以提供信号增强,降噪或故障校正,如果指向相同的条形码图案,多个扫描线可以 使用单个光源和分束器,通过机械扫描以及由顺序激活的光源产生多个同时扫描线可以以较低的机械扫描频率产生光栅扫描,在另一个实施例中, 可调谐激光器可用于提供无移动部件的扫描;来自可调谐激光器的激光束从衍射光栅反射,该衍射光栅产生取决于激光输出波长的角度偏差,因为可调激光器的频率在 一些选定的图案,激光束将相应扫描。

    Bar code incorporated into holographic display
    7.
    发明授权
    Bar code incorporated into holographic display 失效
    条形码整合到全息显示器中

    公开(公告)号:US5422744A

    公开(公告)日:1995-06-06

    申请号:US897772

    申请日:1992-06-12

    摘要: In order to improve security for holographic labels which are positioned on a substrate base, a bar code symbol with regions of different light reflective properties is holographically recorded on the base. The base may be, for example an information card, such as a credit card, a label, or a container for a product. The bar code symbol can be recorded so that it is visible to the eye in white light (e.g., as a rainbow hologram) or so that it requires an appropriate reference beam for reconstruction. A reading apparatus (e.g., a bar code reader) directs light at the holographic bar code symbol and detects the reflected optical information with a detector such as a CCD array. The reading apparatus can be a stand-alone device or, in the case of a credit card, can be incorporated into a conventional swiper for reading magnetic information on a strip on the card. A non-holographic bar code symbol can also be provided on or near a holographic display element, e.g., a rainbow hologram. The bar code can be positioned adjacent the display, or placed in a window within the display, or etched or embossed on the display. A system is also provided for authenticating a holographic display on an information card such as a credit card. A display is illuminated and a reflected beam directed at a holographic record which was previously produced from a signal, known to be authentic, and a reference. The reflected beam is used to reconstruct a reference beam. A sensor receives the reconstructed reference and it is then determined if the display is authentic.

    摘要翻译: 为了提高位于基板基板上的全息标签的安全性,具有不同光反射特性的区域的条形码符号全息地记录在基座上。 基座可以是例如用于产品的信息卡,例如信用卡,标签或容器。 可以记录条形码符号,使得其在白光(例如,作为彩虹全息图)中可见于眼睛,或者使得其需要用于重建的适当的参考光束。 读取装置(例如,条形码阅读器)将光引导到全息条形码符号,并用诸如CCD阵列的检测器检测反射的光学信息。 读取装置可以是独立装置,或者在信用卡的情况下,可以并入到用于读取卡上的条带上的磁信息的常规的卡片中。 也可以在全息显示元件上或附近提供非全息条形码符号,例如彩虹全息图。 条形码可以定位在显示器附近,或者放置在显示器内的窗口中,或者蚀刻或压印在显示器上。 还提供了一种用于在诸如信用卡的信息卡上认证全息显示的系统。 照明的显示器和指向全息记录的反射光束,其先前由已知是真实的信号产生,并且是参考。 反射光束用于重构参考光束。 传感器接收重建的参考,然后确定显示器是否可信。

    Holographic scanning
    8.
    发明授权
    Holographic scanning 失效
    全息扫描

    公开(公告)号:US5504595A

    公开(公告)日:1996-04-02

    申请号:US225350

    申请日:1994-04-08

    CPC分类号: G02B26/106 G06K7/10663

    摘要: A holographic grating element is provided which enables tracing different scan lines. The element is divided into a plurality of sectors. A first grating pattern is provided which diffracts a beam in one direction, and a second grating pattern is next to the first and diffracts the scan beam in the reverse direction. Sectors can be produced with different sector sizes to enable scanning at different rates in the reverse direction, or in successive scans in the same direction. Angle relationships are described to produce diffraction patterns for a desired relationship between disc rotation and the angle of the scan line.

    摘要翻译: 提供了一种能够跟踪不同扫描线的全息光栅元件。 该元件被分成多个扇区。 提供了在一个方向上衍射光束的第一光栅图案,并且第二光栅图案与第一光栅图案相邻,并沿相反方向衍射扫描光束。 扇区可以生产不同的扇区大小,以便能够以相反方向以不同速率进行扫描,也可以在相同方向上进行连续扫描。 描述角度关系以产生用于盘旋转和扫描线的角度之间期望关系的衍射图案。

    Retro-reflective scan module for electro-optical readers
    10.
    发明授权
    Retro-reflective scan module for electro-optical readers 失效
    电光读取器的反光扫描模块

    公开(公告)号:US06360949B1

    公开(公告)日:2002-03-26

    申请号:US09275858

    申请日:1999-03-24

    IPC分类号: G06K710

    CPC分类号: G06K7/10653 G06K7/10683

    摘要: A miniaturized electro-optical, retro-reflective scanning module. The module has a base, a first circuit board, and a second circuit board mounted substantially orthogonal to the first circuit board. The base supports a light emitter for producing a scanning beam and optical elements for directing and collecting light energy. The emitted beam reflects off a fold mirror onto a reflector mounted on a drive for oscillation. The oscillating reflector, in turn, redirects the beam onto an indicia being read. The reflected light is reflected off the oscillating reflector and directed to the collection mirror before reaching a detector. The detector included in the module senses light reflected from an indicia scanned by the beam. The reflector is driven by an electro-magnetiz driven system, including a flexure and an actuation arm.

    摘要翻译: 小型化的电光反光扫描模块。 模块具有底座,第一电路板和大致正交于第一电路板安装的第二电路板。 基座支撑用于产生扫描光束的光发射器和用于引导和收集光能的光学元件。 发射的光束从折叠镜反射到安装在用于振荡的驱动器上的反射器上。 振荡反射器又将光束重定向到被读取的标记上。 反射光从振荡反射器反射并在到达检测器之前被引导到收集镜。 包括在模块中的检测器感测由光束扫描的标记反射的光。 反射器由电磁驱动系统驱动,包括挠曲件和致动臂。