给个英文的.个人理解可能会有点出入.基本上是这个意思. pt?q#EfFJ oze& A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric yGPS`S units, a luminous intensity plot is in units of candelas (lumens per steradian). In vWf;
'j radiometric units, an intensity plot is in units of watts per steradian. Candela plots NwG= <U* are commonly used in the design of illumination systems, especially those used in R]btAu;Z the far field. GP:77)b5 Candela data can be collected from ray sets of Missed rays, rays Exiting a surface OC<5E121>Y or rays Incident on a surface. Missed rays are a collection of all rays that “leave” %^>ju;i^O the model and “go off to infinity.” Exiting rays are the collection of ray segments J_v$YwE following the intersection point of a ray at a surface. Due to ray splitting, several )_i
qAqkS ray segments may contribute to the candela data for each incident ray. Incident NF0%}II&xK rays are the collection of ray segments which intersect the selected surface. No @Q/-s9b surface selection is required for Missed rays but one is necessary for Exiting and I{*<