摘要
设计了一种基于迈克耳孙干涉仪的凝视型激光告警系统,理论分析了系统定向精度和滤光片透射率的变化规律。结果表明,入射激光经过告警系统后,形成环形干涉条纹,根据条纹中心的坐标和条纹间隔可解算入射激光的方向和波长;在探测器像元尺寸固定的情况下,系统的定向精度由光束变换透镜和球面反射镜焦距的比值决定,定向精度随该比值的减小而提高;告警系统滤光片的透射率取决于变换透镜的焦距,当变换透镜焦距为鱼眼镜头焦距10倍时,滤光片对系统入射角为0°-90°范围内激光的透射率为90.0%-87.5%,这保证了系统对各角度的入射激光都有较高的探测灵敏度。
A staring laser threat detection system based on Michelson interferometer is designed,and rules of orientation direction precision and filter＇s transmission efficiency are analysed in theory.Results show that,round interference stripes are formed when input laser is transmitting through the laser threat detection system,the direction and wavelength of input laser can be calculated based on the central coordinate and space of stripes.The direction precision is decided by the ratio of focal lengths of varying lens and spherical reflector when the pixel size of detector is fixed,and the precision rises when the ratio decreases.Filter＇s transmission efficiency is decided by focal length of varying lens.If the varying lens＇s focal length is ten times of fish eyes lens＇s focal length,filter＇s transmission will be 90.0%～87.5% for inputing laser with angle from 0°～90°,and this can make the detecting system have high sensitivity for every input laser from 0°～90°.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2011年第3期215-219,共5页
Chinese Journal of Lasers
关键词
光学设计
激光告警
迈克耳孙干涉仪
凝视告警
定向精度
灵敏度
optical design
laser threat detecting
Michelson interferometer
omni-direction staring detection
orientation direction precision
detecive sensitivity
