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    • 2. 发明申请
    • RAPID FOCUSING DURING AIMING IN LASER SCANNER
    • 在激光扫描仪中快速聚焦
    • WO2010077818A1
    • 2010-07-08
    • PCT/US2009/067884
    • 2009-12-14
    • SYMBOL TECHNOLOGIES, INC.DVORKIS, Paul,BARKAN, Edward,DRZYMALA, Mark,
    • DVORKIS, Paul,BARKAN, Edward,DRZYMALA, Mark,
    • G06K7/10
    • G06K7/10811
    • A laser scanner includes a laser, a variable focusing element, a scanner, a detector, and a controller that controls the scanner to sweep a laser beam over an aiming angle at an aiming rate to form an aiming line on a symbol during aiming, and over a reading angle at a reading rate to form a reading line on the symbol during reading that follows the aiming. The aiming angle is smaller than the reading angle. The aiming rate is higher than the reading rate. The aiming line is shorter than the reading line. The controller determines a depth of modulation of an analog signal generated during aiming, and controls the variable focusing element to focus the laser beam on the symbol during aiming when the depth of modulation is determined to be optimum. The controller also processes the analog signal to data indicative of the symbol during reading.
    • 激光扫描仪包括激光器,可变聚焦元件,扫描仪,检测器和控制器,其控制扫描仪以瞄准速度在瞄准角上扫描激光束,以在瞄准期间在符号上形成瞄准线;以及 以读取速度读取角度,以便在跟踪目标的阅读期间在符号上形成阅读线。 瞄准角小于读取角度。 瞄准率高于阅读率。 瞄准线比阅读线短。 控制器确定在瞄准期间产生的模拟信号的调制深度,并且当调节深度被确定为最佳时,控制可变聚焦元件将瞄准期间的激光束聚焦在符号上。 控制器还在读取期间将模拟信号处理到表示符号的数据。