摘要
为规范大气相干长度的测量,保证测量数据的准确性,通过对大气相干长度测量中采样频率、采样时长、曝光时间等关键问题的分析,并结合国内外相关研究成果,确定了差分像运动测量仪的采样频率应不低于100Hz、采样时长应不短于20s,单帧图像曝光时间应不长于沿测量光路的格林伍德时间常数,样本数应不少于2 000帧。
In order to ensure the accuracy in measurement of atmospheric coherence length, it is necessary to specify qualifications of measurement. The qualifications of differential image mo- tion monitor are determined through analysis of several critical problems such as sampring fre- quency, spampling time and exposure time in measurement of atmospheric coherence length, and combining with the result of domestic and foreign research, it is ensured that the sampling frequency should not be lower than 100 Hz, the sampling time should not be shorter than 20 s, the exposure time of single frame image should not be longer than the Greenwood time constant along with the measuring beam path, and the number of samples should not be less than 2 000 frames.
出处
《应用光学》
CAS
CSCD
北大核心
2013年第3期469-472,共4页
Journal of Applied Optics
基金
国防科技基础研究基金项目
关键词
大气光学
技术指标
差分像运动测量法
大气相干长度
atmospheric optics
quali{ication
di{~erential image motion measurements
atmospheric coherence length
