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31 条记录 (耗时 0.055 秒)

    Bar code symbol reading system employing electronically-controlled raster-type laser scanner for reading bar code symbols during hands-on and hands-free modes of operation
    1.
    发明申请
    Bar code symbol reading system employing electronically-controlled raster-type laser scanner for reading bar code symbols during hands-on and hands-free modes of operation 失效
    条形码符号读取系统采用电子光栅式激光扫描仪，在实际操作和免提操作模式下读取条码符号

    公开(公告)号：US20050001036A1

    公开(公告)日：2005-01-06

    申请号：US10826677

    申请日：2004-04-16

    申请人： Robert Blake ,  Stephen Colavito ,  Xiaoxun Zhu ,  Charles Naylor ,  Thomas Amundsen ,  Thomas Carullo ,  C. Knowles

    发明人： Robert Blake ,  Stephen Colavito ,  Xiaoxun Zhu ,  Charles Naylor ,  Thomas Amundsen ,  Thomas Carullo ,  C. Knowles

    IPC分类号： G06K7/10 ,  G02B26/00

    CPC分类号： G06K7/10851 ,  G06K7/10574

    摘要： A bar code symbol reading system is disclosed comprising a hand-supportable bar code symbol reading device which embodies an electronically-controlled bar code symbol reading engine for producing a raster-type laser scanning pattern in either a hands-free or hands-on mode of operation for scanning 1-D and 2D bar code symbols. The electronically-controlled bar code symbol reading engine has (i) a high-speed/high-resolution raster scanning mode of operation, during which a high-speed, high-resolution raster-type scanning pattern is precisely generated under electronic control, and (ii) a high-speed/low-resolution raster scanning mode of operation during which a high-speed, low-resolution raster-type scanning pattern is precisely generated under electronic control. The electronically-controlled bar code symbol reading engine is induced into its high-speed/high-resolution raster scanning mode of operation when the hand-supportable bar code symbol reading device is removed from its support stand, and into its high-speed/low-resolution raster scanning mode when the hand-supportable bar code symbol reading device is placed into its support stand. The bar code symbol reading engine comprises a pair of mechanically-damped off-resonant laser beam scanning mechanisms that are arranged on a miniature optical bench and electronically-controlled by either a synchronously or synchronously driven drive circuit. When asynchronously driven, the raster laser scanning pattern floats slightly along the y-scanning direction to facilitate reading of 2-D bar code symbols during the hands-on mode of operation.

    摘要翻译： 公开了一种条形码符号读取系统，其包括手持式条形码符号读取装置，该装置体现电子控制的条形码符号读取引擎，用于以免提或手动模式产生光栅型激光扫描图案 扫描一维和二维条形码符号的操作。 电子控制条形码符号读取引擎具有（i）高速/高分辨率光栅扫描操作模式，在此期间电子控制下精确地生成高速，高分辨率光栅型扫描图案，以及 （ii）高速/低分辨率光栅扫描操作模式，其中在电子控制下精确地产生高速，低分辨率光栅型扫描图案。 当手持式条形码符号读取装置从其支撑架移除并进入其高速/低速时，电子控制的条形码符号读取引擎被引入其高速/高分辨率光栅扫描操作模式 当手持式条形码符号读取装置放入其支撑架时，分辨率光栅扫描模式。 条形码符号读取引擎包括一对机械阻尼的非共振激光束扫描机构，其布置在微型光学平台上并由同步或同步驱动的驱动电路进行电子控制。 当异步驱动时，光栅激光扫描图案沿着y扫描方向略微漂浮，以便于在实际操作模式下读取2-D条码符号。

    Electronically-controlled mechanically-damped off-resonant light beam scanning mechanism and code symbol readers employing the same
    3.
    发明申请
    Electronically-controlled mechanically-damped off-resonant light beam scanning mechanism and code symbol readers employing the same 失效
    电子控制的机械阻尼非共振光束扫描机构和采用其的代码符号读取器

    公开(公告)号：US20050236486A1

    公开(公告)日：2005-10-27

    申请号：US11098584

    申请日：2005-04-04

    申请人： Robert Blake ,  Charles Naylor ,  Stephen Colavito ,  Thomas Amundsen ,  Thomas Carullo ,  C. Harry Knowles

    发明人： Robert Blake ,  Charles Naylor ,  Stephen Colavito ,  Thomas Amundsen ,  Thomas Carullo ,  C. Harry Knowles

    IPC分类号： G02B5/08 ,  G02B26/00 ,  G06F17/30 ,  G06K7/10

    CPC分类号： G06K7/10643 ,  G06F17/30879

    摘要： Disclosed is laser beam scanning apparatus in the form of an electronically-controlled mechanically-damped off-resonant laser beam scanning mechanism. The scanning mechanism comprises an etched scanning element having a small flexible gap region of closely-controlled dimensions disposed between an anchored base portion and a laser beam deflecting portion The light beam deflecting portion supports a permanent magnet and a light beam deflecting element (e.g., mirror or hologram). A reversible magnetic force field producing device (e.g., an electromagnet) is placed in close proximity with the permanent magnet so that it may be forcibly driven into oscillation in response to electrical current flowing through the electromagnet. The resonant frequency of oscillation of the laser beam deflecting portion relative to the anchored base portion is determined by the closely controlled dimensions of the flexible gap region set during manufacture. The steady-state frequency of oscillation of the laser beam deflecting portion is determined by the frequency of polarity reversal of the electromagnet, which is electronically controlled by the polarity of electrical current supplied thereto. In the illustrative embodiments, the forcing frequency of the electromagnet is selected to be at least ten percent off (i.e., greater or less than) the natural resonant frequency of the laser beam deflecting portion of the scanning element. The steady-state frequency of oscillation can be set at the time of manufacture to be any one of a very large range of values (e.g., 25-127 Hz) for use in both low-speed and high-speed laser scanning systems.

    摘要翻译： 公开了电子控制机械阻尼非共振激光束扫描机构形式的激光束扫描装置。 扫描机构包括蚀刻的扫描元件，其具有设置在锚定的基部和激光束偏转部分之间的紧密控制的尺寸的小的柔性间隙区域。光束偏转部分支撑永磁体和光束偏转元件（例如，镜 或全息图）。 可逆磁场产生装置（例如，电磁体）被放置成与永磁体紧密相邻，使得其可以响应于流过电磁体的电流被强制地驱动成振荡。 激光束偏转部分相对于锚定基部的振荡的谐振频率由制造期间设置的柔性间隙区域的紧密控制的尺寸确定。 激光束偏转部的振荡的稳态频率由电磁体的极性反转的频率决定，该电磁体由供给的电流的极性进行电子控制。 在说明性实施例中，电磁体的强制频率被选择为扫描元件的激光束偏转部分的固有谐振频率的至少百分之十（即大于或小于）。 振荡的稳态频率可以在制造时设定为用于低速和高速激光扫描系统的非常大范围的值（例如，25-127Hz）中的任何一个。