给个英文的.个人理解可能会有点出入.基本上是这个意思. m.5@q m Q
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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric +t]Ge
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units, a luminous intensity plot is in units of candelas (lumens per steradian). In X7?14W
radiometric units, an intensity plot is in units of watts per steradian. Candela plots (@* %moo
are commonly used in the design of illumination systems, especially those used in ,a0RI<D
the far field. i DsY 5l
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface {"N:2
or rays Incident on a surface. Missed rays are a collection of all rays that “leave” @c>MROlrlF
the model and “go off to infinity.” Exiting rays are the collection of ray segments {uqP+ Cs
following the intersection point of a ray at a surface. Due to ray splitting, several %Go/\g
ray segments may contribute to the candela data for each incident ray. Incident G }]'}FUp
rays are the collection of ray segments which intersect the selected surface. No *iSE) [W
surface selection is required for Missed rays but one is necessary for Exiting and T#Z#YM k
Incident rays. }n,LvA@[0
The candela plots represent flux versus angle and can be smoothed using the AZ\f6r{
Candela Options dialog box. The iso-candela plots can be presented as false IFt aoK
color maps or contour plots. The distribution plots are graphs of cross-sectional zvv/|z2(r
curves through the candela distribution. W yP] ]I.
The orientation of the candela plots is determined by the Normal Vector and the L 5wFbc"u
Up Vector, as specified in the Analysis|Candela Options dialog box. The [_C([o'\KY
normal vector specifies the axis of the candela plot and the up vector specifies }JUc!cH8z
“which way is up.”
