摘要
具有一定强度的激光辐照皮肤组织时可造成组织的破坏。本文建立了激光辐照皮肤组织的二维热效应模型,并在柱坐标系下精确求解了高斯分布的激光脉冲辐照皮肤组织的热传导方程,得到瞬态温度场分布。研究结果表明:脉冲激光对皮肤组织的热损伤,最早发生在光束中心处,并沿着径向和轴向衰减,当脉冲激光辐照后一段时间,温度达到最大值时并不是发生在脉冲结束时,而是在脉冲结束后的一段时间内。脉冲激光辐照皮肤组织,激光能量密度起着决定性因素,焦斑半径也是影响作用效果的一个非常重要的参数。
The thermal physical model is established. The 2-D distribution of temperature is studied by Gauss pulses beam. By numerical method, the relationship of the temperature with irradiated time is obtained. It is found that the thermal damage of skin - tissue irradiated by pulses laser takes place firstly at the center of surface, and the temperature decreases in the z and radial direction. And the maximum temperature doesn＇t happen when the pulse ended,but a period of time after the pulse. Compared to other laser parameters, energy density and beam size are more important.
出处
《激光与红外》
CAS
CSCD
北大核心
2007年第12期1259-1261,1269,共4页
Laser & Infrared
基金
中国博士后科学基金(20060400418)资助
解放军军械工程学院重点研究基金(YJJXM05002)资助
关键词
激光物理
激光辐照效应
解析计算
温度分布
皮肤组织
laser physics
laser irradiation effect
resolution calculation
temperature distribution
skin-tissue
