给个英文的.个人理解可能会有点出入.基本上是这个意思. V4jMx[
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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric LXX('d
units, a luminous intensity plot is in units of candelas (lumens per steradian). In o ]&q'>Rf
radiometric units, an intensity plot is in units of watts per steradian. Candela plots ^7 +;XUyg
are commonly used in the design of illumination systems, especially those used in 03 gbcNo
the far field. /5Qh*. (S
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface ![K\)7 iKo
or rays Incident on a surface. Missed rays are a collection of all rays that “leave” 7mYcO3{5{
the model and “go off to infinity.” Exiting rays are the collection of ray segments KJQ8Yhq
following the intersection point of a ray at a surface. Due to ray splitting, several lFt!
ray segments may contribute to the candela data for each incident ray. Incident w ~v6=^
rays are the collection of ray segments which intersect the selected surface. No FtyT:=Kpc
surface selection is required for Missed rays but one is necessary for Exiting and n',X,P0
Incident rays. ' F.^ 8/>
The candela plots represent flux versus angle and can be smoothed using the AVD hgJv
Candela Options dialog box. The iso-candela plots can be presented as false 6vbKKn`ST
color maps or contour plots. The distribution plots are graphs of cross-sectional nm#23@uZ4K
curves through the candela distribution. _Sd^/jGpU
The orientation of the candela plots is determined by the Normal Vector and the I ==)a6^
Up Vector, as specified in the Analysis|Candela Options dialog box. The ;iX~3[]
normal vector specifies the axis of the candela plot and the up vector specifies {7m2vv? Z
“which way is up.”
