给个英文的.个人理解可能会有点出入.基本上是这个意思. PL+fLCk,I qs-:JmA_w A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric [>_(q|A6+ units, a luminous intensity plot is in units of candelas (lumens per steradian). In &
bw1 radiometric units, an intensity plot is in units of watts per steradian. Candela plots 'pm2C6AC are commonly used in the design of illumination systems, especially those used in LK:|~UV? the far field. `XWxC:j3% Candela data can be collected from ray sets of Missed rays, rays Exiting a surface *.nqQhW or rays Incident on a surface. Missed rays are a collection of all rays that “leave” T.`%1S the model and “go off to infinity.” Exiting rays are the collection of ray segments ;:$Na= following the intersection point of a ray at a surface. Due to ray splitting, several !&'xkw ` ray segments may contribute to the candela data for each incident ray. Incident ? ! 1uw rays are the collection of ray segments which intersect the selected surface. No swLgdk{8n surface selection is required for Missed rays but one is necessary for Exiting and ]-PF? 8 Incident rays. 7L-%5:1% The candela plots represent flux versus angle and can be smoothed using the TyBNRnkt Candela Options dialog box. The iso-candela plots can be presented as false s`
9zW, color maps or contour plots. The distribution plots are graphs of cross-sectional `chf8 curves through the candela distribution. XIp9=jhSR The orientation of the candela plots is determined by the Normal Vector and the [#9ij3vxd Up Vector, as specified in the Analysis|Candela Options dialog box. The "!Qhk3* normal vector specifies the axis of the candela plot and the up vector specifies T:!sfhrZ~< “which way is up.”