By infrared thermal imaging techniques in this thesis, the focal spot size and focal length of this dielectric lens antenna are measured.
本论文应用红外热成像技术，对毫米波介质透镜天线的焦斑焦距进行了测量。
The general expressions of the ground resolution and the telescope focal length for an imaging spectrometer were deduced to investigate the increase of energy integral time with motion compensation.
针对用运动补偿增加成像光谱仪能量积分时间的情况，推导出了其地面分辨率和望远系统焦距选择的一般表达式。
On the basis of thin-lens focal length measurement experiment, the imaging law of refraction-reflection system was further studied.
在薄透镜焦距测定实验的基础上，进一步讨论了折射反射系统成像的规律。
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