[讨论]位置空间光照度与角度空间光照度 [复制链接]

请问各位同行，位置空间光照度与角度空间光照度是怎样的关系？它们之间的数学转换公式是什么？下面是一个方形通光管出来的光照度~ R`Ys;g/!  
Mr5('9%  

描述:角度空间光照度

图片:angle space.JPG

E)&NP}k-P  
)1ZJ  

描述:位置文件光照度

图片:postition space.JPG

E"9/YWv  
%fn'iKCB  

What solid angle does that angular pixel represent? +s+PnZ%0V  
Y-neD?VN  
To answer that question we project out from the local axis of the detector to construct a sphere some long distance away from the detector, centered on the detector. We then (conceptually) fire rays from this point at x, y angles of (5, 40), (5, 41), (6, 41), and (6, 40). Now we know that patch of area, we can compute the solid angle subtended by that angular pixel. ,{`o/F/  
How is Radiant Intensity Defined ~$y#(YbH  
HonAK  
6S! lD=  
红色标出的那句是什么意思？ +e\:C~2f28  
:r vO8.\  
%
4r!7X|O<  
'$kS
]U