摘要
根据实测的湍流结构常数的高度分布资料，分析了大孔径和小孔径两种情况下湍流外尺度Ｌ＿０对大气相干长度ｒ＿０和等晕角θ＿０的影响。计算结果表明，在Ｌ＿０为有限值情况下，ｒ＿０和θ＿０明显地增大了，对于大孔径望远镜，在红外波段，如波长为２．２μｍ，ｒ＿０和θ＿０更大，θ＿０甚至可达０．５ｍｒａｄ。
Based on the measured altitude distributional adta of the turbulence structure constant(),this article analyses the effect of turbulent outer scale(L_0)on atmospheric transverse coherenee length(r_0)and isplanatic angle (θ_0). The calculation result shows that r_0 andθ_0 will obviously increase when limited L_0 is col1sidered. The r_0 and θ_0 are much larger for large telescope at 2.2μm. The limit of θ_0 is likely to be 0.5 Mrad and may be even larger.
出处
《强激光与粒子束》
EI
CAS
CSCD
1994年第3期469-473,共5页
High Power Laser and Particle Beams
关键词
湍流外尺度
大气相干长度
等晕角
turbulent outer scale,atmospheric transverse coherencr length,isoplanatic angle
