功率自适应半导体激光治疗仪的研制

Development of power self-adapting semi-conductor laser therapeutic instrument

目的：解决低功率半导体激光治疗仪波长单一，输出功率不稳定而不能满足研究弱激光生物效应和临床治疗需要的问题。方法：采用AT89S52单片机控制，软件运用PID算法。结果：仪器可输出波长为532nm的绿光和波长为650nm的红光．输出功率分别为0～30mW和0～50mW，且连续可调，功率精确到0．1mW。结论：该半导体激光治疗仪体积小，操作简单，激光输出稳定可靠，能很好地满足研究弱激光的生物效应和临床治疗的需要。

Objective To solve the problems of low power laser instrument with single wavelength and instable output power as well as its incapability of studying the biological effect of low intensity laser and clinical treatment. Methods The AT89S52 singlechip and PID algorithm were used. Results The desired instrument could output the wave of 532nm green laser which could be adjusted continuously from 0mW to 30mW and the wave of 650nm red laser which could be adjusted continuously from 0mW to 50mW. The error of power could be controlled within 0.1mW. Conclusion The instrument can be used to study the biological effect of low intensity laser and clinical treatment with small volume, easy operation and high stability of laser output.