给个英文的.个人理解可能会有点出入.基本上是这个意思. F9Ag687w 7.o:(P1??g A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric oVLgH B\zL units, a luminous intensity plot is in units of candelas (lumens per steradian). In 6DFF:wrm& radiometric units, an intensity plot is in units of watts per steradian. Candela plots BWct0= are commonly used in the design of illumination systems, especially those used in 9p#Laei]. the far field. xjOj1Hv Candela data can be collected from ray sets of Missed rays, rays Exiting a surface O,kzU,zOs or rays Incident on a surface. Missed rays are a collection of all rays that “leave” a JC, the model and “go off to infinity.” Exiting rays are the collection of ray segments Y70[Nz following the intersection point of a ray at a surface. Due to ray splitting, several ByrK|lVM0 ray segments may contribute to the candela data for each incident ray. Incident KKd Sh1 rays are the collection of ray segments which intersect the selected surface. No OeuM9c{ surface selection is required for Missed rays but one is necessary for Exiting and >_Dq )n;% Incident rays. -];/ *nl The candela plots represent flux versus angle and can be smoothed using the PSO9{! Candela Options dialog box. The iso-candela plots can be presented as false Bw31h3yB color maps or contour plots. The distribution plots are graphs of cross-sectional q}PeXXH curves through the candela distribution. TRl,L5wd-? The orientation of the candela plots is determined by the Normal Vector and the hy"O_Le Up Vector, as specified in the Analysis|Candela Options dialog box. The 0Jh^((i* normal vector specifies the axis of the candela plot and the up vector specifies ' {L5 3cH= “which way is up.”