[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~ i6R2R8  
1O bxQ_x  

描述:角度空间光照度

图片:angle space.JPG

J/3qJst
 
pkjf5DWp  

描述:位置文件光照度

图片:postition space.JPG

YfBb=rN2s  
# Ny  

What solid angle does that angular pixel represent? nU]n]gd  
2N_8ahc  
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]{3aMs!Y  
How is Radiant Intensity Defined S,Q!Xb@  
"&jA CI  
mG4myQ?$  
红色标出的那句是什么意思？ QC7Ceeh]4  
&$yC+cf  
juQ&v>9W)  
( ONn{12Q