公开(公告)号：US5258605A

公开(公告)日：1993-11-02

申请号：US864367

申请日：1992-04-06

申请人： Boris Metlitsky ,  Joseph Katz ,  Dean Gousgounis ,  Emanuel Marom

发明人： Boris Metlitsky ,  Joseph Katz ,  Dean Gousgounis ,  Emanuel Marom

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

CPC分类号： G06K7/1473 ,  G06K7/10574 ,  G06K7/10673 ,  G06K7/10702 ,  G06K7/14 ,  G06K7/1417

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。

公开(公告)号：US5545886A

公开(公告)日：1996-08-13

申请号：US98991

申请日：1993-07-29

申请人： Boris Metlitsky ,  Joseph Katz ,  Emanuel Marom ,  Dean Gousgounis

发明人： Boris Metlitsky ,  Joseph Katz ,  Emanuel Marom ,  Dean Gousgounis

IPC分类号： G06K7/10 ,  G06K7/14

CPC分类号： G06K7/1473 ,  G06K7/10574 ,  G06K7/10673 ,  G06K7/10702 ,  G06K7/14 ,  G06K7/1417

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。