给个英文的.个人理解可能会有点出入.基本上是这个意思. (t[sSl z'"e|) A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric Qze.1h units, a luminous intensity plot is in units of candelas (lumens per steradian). In VO
u/9]a radiometric units, an intensity plot is in units of watts per steradian. Candela plots '/O >#1 are commonly used in the design of illumination systems, especially those used in L/*D5k%J the far field. mQd
L"caA Candela data can be collected from ray sets of Missed rays, rays Exiting a surface 7F$G.LhMw or rays Incident on a surface. Missed rays are a collection of all rays that “leave” Q7#Yw"#G! the model and “go off to infinity.” Exiting rays are the collection of ray segments 2J;_9
g&M following the intersection point of a ray at a surface. Due to ray splitting, several 1|bg;X9+ ray segments may contribute to the candela data for each incident ray. Incident v=8sj{g3,3 rays are the collection of ray segments which intersect the selected surface. No ~$PY6s surface selection is required for Missed rays but one is necessary for Exiting and sx1w5rj.Y0 Incident rays. e)BU6m% The candela plots represent flux versus angle and can be smoothed using the 4J5 RtK Candela Options dialog box. The iso-candela plots can be presented as false 0)Nu color maps or contour plots. The distribution plots are graphs of cross-sectional 2e_ m>I curves through the candela distribution. -}x( MZ The orientation of the candela plots is determined by the Normal Vector and the Lqa|9|! Up Vector, as specified in the Analysis|Candela Options dialog box. The U,Q normal vector specifies the axis of the candela plot and the up vector specifies
Q h~ “which way is up.”