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    • 9. 发明授权
    • Laser control apparatus with a current detecting and interrupting system
    • 具有电流检测和中断系统的激光控制装置
    • US06347105B1
    • 2002-02-12
    • US09411393
    • 1999-10-04
    • Tomobumi NakayamaMichiharu MasudaHisatsugu TaharaAkio ItoYukio Yokoyama
    • Tomobumi NakayamaMichiharu MasudaHisatsugu TaharaAkio ItoYukio Yokoyama
    • H01S300
    • H01S5/06825
    • An image forming apparatus is arranged to form an image with laser light emitted from a semiconductor laser source, and is constructed so as to protect the laser source from a breakdown, by regulating electric current flowing to the laser source no matter when an adjusting circuit for adjusting the light amount of the semiconductor laser source is apt to supply the electric current that could break the laser source, to the laser source. The apparatus is constructed in such structure that during an automatic light amount control period the laser light amount emitted from the semiconductor laser source is detected and a current source circuit is made inactive when the light amount detected is over a set light amount and that during periods other than the control period the electric current flowing to the semiconductor laser is detected and the current source circuit is made inactive when the light amount detected becomes over a fixed ratio times the current detected during the automatic light amount control period. In this way, the protection circuit can operate effectively anytime of emission of the laser source, so as to protect the laser source from the breakdown.
    • 图像形成装置被配置成通过从半导体激光源发射的激光形成图像,并且被构造成通过调节流向激光源的电流来保护激光源免受击穿,不管当调节电路 调整半导体激光源的光量易于将激光源的电流提供给激光源。 该装置的结构是这样一种结构,即在自动光量控制期间,检测出半导体激光源发出的激光量,并且当检测到的光量超过设定的光量时,电流源电路被激活,而在期间 当检测到的光量变得超过在自动光量控制周期期间检测到的电流的固定比率时,检测到流过半导体激光器的电流,并且检测流过半导体激光器的电流,并使电流源电路无效。 以这种方式,保护电路可以随时发射激光源,以保护激光源免受击穿。