Impulse modulation for ultraviolet deuterium light source and apparatus thereof

In the present invention, deuterium lamp is worked under normal operating current at detection period and its operating current is decreased to pre-burning value to hold it at light-up and non-working state for coming into measurement state at any time in interval period of detection. The pre-burning or measurement waiting state can only be achieved after lamp filament is preheated and ignited with high voltage. This method not only can satisfy requirement for quick measurement, but also can increase service time of deuterium lamp. 本发明是一种紫外氘灯光源的脉冲调制方法及其装置，属于光学测量光源的计算机控制方法，紫外光源在光谱测量中应用广泛，随着信息处理技术的发展，要求光源适应测量的快速节奏。而现有的氘灯光源每次点燃氘灯需要很长的预热时间，不能满足随时检测的需要，若在检测间断时不关闭，氘灯很快达到其寿命而损坏，本发明经过大量的试验，找到了一种脉冲调制的方法，其特征是在检测期间氘灯工作在正常工作电流下，而检测间断期，其工作电流降低到预燃值上，保持其已点燃非工作状态，可随时进入测量状态，这种氘灯预燃状态，是经过灯丝预热和高压点火之后才能进入预燃或测量等待状态，不但可满足快速测量的需要，而且增加了氘灯寿命。