[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~ Zn9u&!T&  
e=&~6bs1U  

描述:角度空间光照度

图片:angle space.JPG

T<*)Cdid  
 xL15uWk-  

描述:位置文件光照度

图片:postition space.JPG

5t%8y!s  
Ck/44Wfej  

What solid angle does that angular pixel represent? '9!_:3[d\]  
_
_b4
dv  
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. ;i[JCNiS\  
How is Radiant Intensity Defined GTLS0l)  
Movm1*&=  
&.E/%pQ`  
红色标出的那句是什么意思？ X|\`\[  
]$drBk86bh  
#HV5M1mb  
2,:{ 5]Q$