[求助] [已解决]lt里查看光斑大小和光束角度到底是看哪一个呢？

这4个，哪个是光斑大小，哪个是光束角啊

illuminance是空间分布，intensity是角度分布。

illuminance可以看接收面光强分布，可以查半峰值宽度，或自定义查询？？%峰值宽度

这个命名真难看出来是什么意思
😀

帮助文档里有写。


You can place a surface receiver on almost any surface of a solid or on a dummy
surface. For details about placing surface receivers in a LightTools model, see
Placing Receivers on page 114.
A surface receiver can generate the following four types of illumination output:
Irradiance (watts/area) or illuminance (lumens/area, expressed as lux, footcandles,
phots, or milliphots), which describes the spatial variation of the irradiance or
illuminance incident on the receiver surface. The choice of units mode (radiometric
or photometric) determines the choice of output units. This output does not include
any information on the angular variation of the illumination incident on the receiver
surface.
Radiant intensity (watts/sr) or luminous intensity (lumens/sr, expressed as
candelas), which describes the angular variation of the intensity incident on the
receiver. The choice of power units determines the output units. The intensity
output does not include any information on the spatial variation of the intensity
across the surface.