[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~ KIf da
fRL  
? 7n`A >T  

描述:角度空间光照度

图片:angle space.JPG

-q1??u  
|(E FY\  

描述:位置文件光照度

图片:postition space.JPG

F=e8IUr  
O!#g<`r{K  

What solid angle does that angular pixel represent? _~l5u8{^6  
;>EM[u  
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. 7hD>As7`/  
How is Radiant Intensity Defined 2/\r)$ 2i  
o4F2%0gJ  
&ZlVWK~v  
红色标出的那句是什么意思？ l|JE#  
NqazpB*  
ar!R|zmf  
Ha0M)0Anv