给个英文的.个人理解可能会有点出入.基本上是这个意思. >m=XqtP O`PQ4Q*F A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric j~cG#t] units, a luminous intensity plot is in units of candelas (lumens per steradian). In @00&J~D radiometric units, an intensity plot is in units of watts per steradian. Candela plots `d
x.<R#, are commonly used in the design of illumination systems, especially those used in bHTTxZ-% the far field. ;L$l0(OO Candela data can be collected from ray sets of Missed rays, rays Exiting a surface >Il{{{\> or rays Incident on a surface. Missed rays are a collection of all rays that “leave” s(=@J?7As the model and “go off to infinity.” Exiting rays are the collection of ray segments b`cH.v following the intersection point of a ray at a surface. Due to ray splitting, several [s%uE+``S ray segments may contribute to the candela data for each incident ray. Incident xyXVWd[ rays are the collection of ray segments which intersect the selected surface. No | OZ>5 surface selection is required for Missed rays but one is necessary for Exiting and O\@0o|NM Incident rays. Tv%
Z|%* The candela plots represent flux versus angle and can be smoothed using the B7%m7GM Candela Options dialog box. The iso-candela plots can be presented as false
[Z1,~(3 color maps or contour plots. The distribution plots are graphs of cross-sectional 9/R=_y- curves through the candela distribution. M{Vi4ehOq The orientation of the candela plots is determined by the Normal Vector and the >{0,dGm Up Vector, as specified in the Analysis|Candela Options dialog box. The 6}\J-A/ normal vector specifies the axis of the candela plot and the up vector specifies lZ`@ }^& “which way is up.”