摘要
具有一定能量强度的激光辐照CCD图像探测器时可造成探测器的干扰和破坏。基于热传导和热弹性力学的基本关系式建立了脉冲激光辐照CCD多层结构的热力耦合数学物理模型,对热传导方程和应力平衡方程进行有限元数值求解,计算得到不同能量密度下脉冲激光辐照CCD的瞬态温度场和热应力场,分析了CCD最易损伤的位置及激光参数对探测器损伤的影响,并结合CCD的像元构造和工作方式阐明了CCD各层结构的损伤对CCD成像质量的影响程度及影响机理。
CCD arrays can be disturbed or damaged when subjected to laser irradiation. The multilayer thermal-mechanical physical model of CCD irradiated by pulsed laser is set up based on heat conduction and thermal elastic mechanics theories, the heat conduction differential equation and stress-balance equation are solved by the finite elements method. The transient temperature field, thermal stress field and the most probably damaged position are obtained, with CCD pixel structure and operation mode presented, the influences of laser parameters and each damaged layer to CCD imaging formation are discussed as well.
出处
《激光与红外》
CAS
CSCD
北大核心
2008年第10期1004-1007,共4页
Laser & Infrared
基金
中国博士后科学基金(No.20060400418)
军械工程学院重点研究基金(No.YJJXM05002)资助
关键词
激光破坏
CCD
损伤机理
温度场
热应力场
laser induced damage
CCD
damage mechanism
temperature field
thermal stress field
