The focal spot, size depend on the pinhole diaphragm diameter of spatial filter.
光斑尺寸和空间滤波系统的针孔光阑直径有关。
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。
Simulation results show that the size of the focal spot increases with the number of color cycles and the basic pulse bandwidth in the dispersing direction.
模拟结果表明，焦斑尺寸随色循环数和光栅色散方向上基准脉冲带宽的增加而增大。
Using this focusing system, the laser microbeam instrument has got the focal spot size of less than 0.
用这个激光聚焦系统，激光微束仪能获得直径小于0。
The Modulation Transfer Function(MTF) of X-ray tube focal sPOt and its size are the main parameters, which can be used to describe the photo function of X-ray tube focal spots.
线管焦点的调制传递函数（MTF）和焦点尺寸是描述X线管焦点成像性能的主要参数。
But the size perpendicular to polarization direction of focal spot with linear polarized beam is always smaller than that of radially polarized beam.
而线偏振光聚焦光斑垂直于偏振方向的直径始终小于径向偏振光聚焦光斑直径。
But the size perpendicular to polarization direction of focal spot with linear polarized beam is always smaller than that of radially polarized beam.
而线偏振光聚焦光斑垂直于偏振方向的直径始终小于径向偏振光聚焦光斑直径。
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