会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 10. 发明授权
    • Arrangement for and method of regulating laser output power in electro-optical readers
    • 电光读取器中激光输出功率的调整和调节方法
    • US08733659B2
    • 2014-05-27
    • US12870040
    • 2010-08-27
    • James GiebelMatthew BlasczakPeter FazekasMark Weitzner
    • James GiebelMatthew BlasczakPeter FazekasMark Weitzner
    • G02B26/10
    • G06K7/10584
    • In an electro-optical reader, an aiming or a scanning laser has a laser chip and a monitor photodiode. Output power of a laser beam emitted by the laser is regulated by a feedback circuit for maintaining substantially constant the laser beam output power during normal operation, a disabling circuit for disabling the feedback circuit, a drive circuit for driving the chip with a drive current when the feedback circuit is disabled, and for concomitantly generating a photodiode output voltage, a current modification circuit for modifying the drive current by a predetermined current with a concomitant change in the photodiode output voltage when the feedback circuit is disabled, and a control circuit for monitoring the change in the photodiode output voltage, for determining whether the change in the photodiode output voltage is sufficient to indicate an over-power condition, and for interrupting power to the chip when the over-power condition is indicated.
    • 在电光读取器中,瞄准或扫描激光器具有激光芯片和监视器光电二极管。 由激光器发射的激光束的输出功率由反馈电路调节,用于在正常操作期间保持激光束输出功率基本上恒定,用于禁用反馈电路的禁用电路,用于以驱动电流驱动芯片的驱动电路, 反馈电路被禁止,并且用于同时产生光电二极管的输出电压,用于当反馈电路被禁用时用光源输出电压的伴随变化来修改驱动电流预定电流的电流修改电路,以及用于监视的反馈电路的控制电路 光电二极管输出电压的变化,用于确定光电二极管输出电压的变化是否足以指示过功率状态,以及当指示过功率状态时中断芯片的电源。