The number of photons collected by a pixel, and therefore the pixel value, is a measure of the flux, and thus of the brightness of the light source.
一个像素所收集到的光量子数，也就是像素值，是测量的光通量的方式，即反映了光源的亮度。
2
The headlamp have strict requirement on beam pattern and lightflux distribution of gas discharge light source.
汽车前照灯作为光学系统对气体放电光源的光束形状和光通分布有严格的要求。
3
When flying objects with high speed pass through the laser screen, change of lightflux is transformed into electronic signal and sampled by data sampling card and processed by computer.