摘要
设计了一种激光远场直接探测系统,对系统中的两个关键问题进行了讨论,一、在探测器阵列靶板尺寸的确定问题上讨论了激光的衍射效应和大气湍流的影响;二、在探测器阵列靶板分辨率的确定问题上讨论了激光的衍射效应和大气湍流的影响;对第二问题讨论了对其有影响的三个方面:大气湍流引起激光碎斑尺寸,由采样定理决定的空间采样率,由阵列探测器的频谱函数引起的损失。这些影响都是在设计时必须予以充分考虑的因素。
A detector array target of laser distant-field detect system is designed, and two key factors are analyzed. To determine the size of the array target, the laser diffract effect and the influence of atmospheric turbulence are discussed, three factors that influence the resolution of the array target are analyzed. Three factors are the dimension of laser speckle resulted by atmospheric turbulence,space sampling frequency based on sampling theory and the loss of the frequency spectrum function of the array detector. All of these must be matured in design.
出处
《激光与红外》
CAS
CSCD
北大核心
2006年第7期531-533,共3页
Laser & Infrared
关键词
探测器阵列靶板
大气湍流
空间采样率
光束漂移
激光碎斑
detector array target
atmospheric turbulence
space sampling frequency
beam shift
laser spackle
