引用第2楼mave1609于2007-12-20 09:35发表的 : C
Ejf&n 謝謝板主的回答 N| L Ey 不過所問的問題範圍太大了太唤y 3XomnL{ 如果把問題詳細描述 4XL]~3 c 在Rectangular Candela Distribution Plot中 C'jE'B5b .......
给个英文的.个人理解可能会有点出入.基本上是这个意思. ,3`RM$ z"C+r'39d= A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric _jW}p-j units, a luminous intensity plot is in units of candelas (lumens per steradian). In !@x'?+
radiometric units, an intensity plot is in units of watts per steradian. Candela plots b8@gv OB are commonly used in the design of illumination systems, especially those used in [j:]YR the far field. wKq-|yf, Candela data can be collected from ray sets of Missed rays, rays Exiting a surface naT;K0T= or rays Incident on a surface. Missed rays are a collection of all rays that “leave” bQ"w%! the model and “go off to infinity.” Exiting rays are the collection of ray segments +EWfsKz following the intersection point of a ray at a surface. Due to ray splitting, several Iw0Q1bK( ray segments may contribute to the candela data for each incident ray. Incident 62X;gb rays are the collection of ray segments which intersect the selected surface. No Ws;}D}+ surface selection is required for Missed rays but one is necessary for Exiting and 0V&6"pF_Y' Incident rays. 7]~65@%R-& The candela plots represent flux versus angle and can be smoothed using the 0{PRv./` Candela Options dialog box. The iso-candela plots can be presented as false ;(0E#hGN color maps or contour plots. The distribution plots are graphs of cross-sectional XY;cz curves through the candela distribution. Y4 Y;xK" The orientation of the candela plots is determined by the Normal Vector and the : _>/Yd7-& Up Vector, as specified in the Analysis|Candela Options dialog box. The ;{e ;6Hq normal vector specifies the axis of the candela plot and the up vector specifies 4ISZyO= “which way is up.”