[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~ q+oc^FD?@  
3{t[>O;  

描述:角度空间光照度

图片:angle space.JPG

rC
!"<  
v<g~EjzCf  

描述:位置文件光照度

图片:postition space.JPG

vzbGLap#  
Sy1O;RTn`  

What solid angle does that angular pixel represent? *P7/ry^<F  
46e?
%0(  
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. )fIG4#%\  
How is Radiant Intensity Defined ^t7u4w!  
.uS`RS8JM  
^<cJ;u*0  
红色标出的那句是什么意思？ n-jPb064  
.AO-S)wHR  
f sh9-iY8e  
C,eP!_O