[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~ LyM"  
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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? CCp&P5[67  
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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. r:u,  
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红色标出的那句是什么意思？ `[vm{+i  
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