便携式脉冲调制型医用半导体激光器的驱动电源及光学透镜系统的设计

针对脉冲激光器穴位照射治疗的特点，对半导体激光二极管（LD）的驱动电路及光学镜头系统的设计进行了研究。本文设计了一款新型的锂电池供电便携式脉冲医用激光器，介绍了采用脉冲调制恒流驱动的原理以及采用透镜组和电路调整的方法改变激光照射功率密度的光学镜头的设计方法。该款脉冲激光器适用于激光体外穴位照射，对激光临床应用有一定的意义。

The design of pulse modulation driving circuit and optical lens system for portable medical semiconductor laser

In the view of the laser therapy of acupuncture with pulsed laser, we study a semiconductor laser diode driving circuit and a new design of the optical lens system. This paper devises a new type of lithium battery powered medical pulsed laser with the advantages of portable. We describe the basic principle of the pulse signal modulation circuit for LD, and illuminate the design method of the optical lens system which adjusts the lens system and circuit parameter to change the laser power density. This type of device is applicable to the therapy that low intensive laser irradiates directly on the acupuncture point, and has certain significance to the application of laser in clinical medicine.