摘要
根据激光大气传输特性及衍射理论,提出一种对阵列探测器中相邻探测单元测量值之间进行插值的新方法——"高斯"插值法,并且对该方法获得的远场光强分布与"马赛克"及"线性"插值方法获得的光强分布进行了比较。结果表明:当焦平面处83.9%和63.2%环围能量半径上具有相同的探测单元时,"高斯"插值方法比其他两种方法复原的光强分布更为接近原始光斑的光强分布,其中"马赛克"方法复原的光强分布与原始的光强分布相比偏差较大。另外,从光斑大小考虑,"高斯"插值法也能够较好地复原出远场的空间光强分布。
A new interpolation method recovering the irradiance distribution of the adjoining cell in array detectors had been proposed based on the characteristic of laser propagation in the atmosphere and diffraction theory, which was named as ＂Gaussian＂ interpolation method. The ＂Gaussian＂ interpolation method, the ＂mosaic＂ and ＂linear＂ interpolation method in recovering the irradiance distribution were compared. The results show that the recovered irradiance distribution using ＂Gaussian＂ interpolation method is in the proximity to that of the original focal image compared with the other two methods, and the recovery error using the ＂mosaic＂ interpolation method is the largest among the three interpolation methods when detector cells are equal in the 83.9% and 63.2% encircled energy beam radius on the focal plane. Moreover, from the consideration of the size of focal image in different time, the better irradiance distribution in the focal plane can also be recovered by ＂Gaussian＂ interpolation method.
出处
《红外与激光工程》
EI
CSCD
北大核心
2009年第5期815-819,共5页
Infrared and Laser Engineering
基金
国家高科技研究发展计划资助项目
中国科学院合肥物质科学研究院计算中心资助项目
关键词
插值法
阵列探测器
光强分布
高能激光束
Method of interpolation
Array detector
Irradiance distribution
High energy laser
