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 u )kWDk
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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric D<-MbK^S
units, a luminous intensity plot is in units of candelas (lumens per steradian). In h[|c?\E
z
radiometric units, an intensity plot is in units of watts per steradian. Candela plots Qy>n]->%
are commonly used in the design of illumination systems, especially those used in jF5Y-CX
the far field. |yqL0x0\l
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface {$,t^hd
or rays Incident on a surface. Missed rays are a collection of all rays that “leave” sp=;i8Y 3
the model and “go off to infinity.” Exiting rays are the collection of ray segments p ~/
following the intersection point of a ray at a surface. Due to ray splitting, several EDMuQu/D8
ray segments may contribute to the candela data for each incident ray. Incident ]kXiT Yg
rays are the collection of ray segments which intersect the selected surface. No 1{ TmK9U
surface selection is required for Missed rays but one is necessary for Exiting and ~]CQ
DR:
Incident rays. z}'-gv\,
The candela plots represent flux versus angle and can be smoothed using the O] T'\6w
Candela Options dialog box. The iso-candela plots can be presented as false 3#O R fr(
color maps or contour plots. The distribution plots are graphs of cross-sectional
eXN\w]GE
curves through the candela distribution. k[ {h$
The orientation of the candela plots is determined by the Normal Vector and the =UGyZV:z5
Up Vector, as specified in the Analysis|Candela Options dialog box. The sqtMhUQ?>w
normal vector specifies the axis of the candela plot and the up vector specifies 2pKkg>/ S
“which way is up.”
