[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~ zn*i  
waV4~BdL  

描述:角度空间光照度

图片:angle space.JPG

b
%X}{/n  
#]}G{ P  

描述:位置文件光照度

图片:postition space.JPG

W`wT0kP?*]  
&.0wPyw  

What solid angle does that angular pixel represent? GwlAEhP  
K~z9b4a>  
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. ga91#NWgK  
How is Radiant Intensity Defined C?b_E  
s0'Xihsw6  
\6Hu&WHy  
红色标出的那句是什么意思？ Yr+ghl
/ V  
ch}(v'xv(  
.aR$ou,7  
D
#&N?<}