旋转镜鼓式热像仪的光雷达回波特性
Laser radar echo characteristics of infrared thermal camera with a reflective rotary drum
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摘要: 旋转镜鼓式热像仪对光场的扫描主要由镜鼓来完成,在激光束的照射下,镜鼓棱及其邻域的后向散射不可避免地给散射光引进了一个附加的多普勒频移。对平行光束经热像仪后的动态回波特性进行分析研究,提出了一种测量光束多普勒频移的方法,并建立了相应的实验系统。实验结果与理论分析是一致的,为判别热像仪的工作方式提供了一种可能的方法。
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关键词:
- 旋转镜鼓 /
- 动态回波特性 /
- 多普勒频移 /
- 相干式CO2激光跟踪雷达
Abstract: For most reflective images, scanning of the light field is carried out by a scanning mirror drum, so back scattering light from the reflective mirror, which is illuminated by a laser beam, brings inevitably about a Doppler frequency shift. In this paper, the dynamic echo characteristics of an IR thermal camera, which was illuminated by a laser beam, are analyzed. Selfmodulation of “cat eye effect” is also present. An experiment was designed to measure the Doppler frequency shift of the rotary mirror drum. The analytical results have been proved with a laser radar trace system.-
Key words:
- rotary mirror drum /
- dynamic echoing /
- dopple frequency shift /
- coherent co2 lidar
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