[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~ I^*&u,  
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描述:角度空间光照度

图片:angle space.JPG

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描述:位置文件光照度

图片:postition space.JPG

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What solid angle does that angular pixel represent? t?JY@hT*  
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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. ATq)8Rm\  
How is Radiant Intensity Defined L'XX++2  
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红色标出的那句是什么意思？
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