给个英文的.个人理解可能会有点出入.基本上是这个意思. NN mM#eB:4
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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric ~2(]ZfO?>H
units, a luminous intensity plot is in units of candelas (lumens per steradian). In }2=hd. .
radiometric units, an intensity plot is in units of watts per steradian. Candela plots c})wD+1
are commonly used in the design of illumination systems, especially those used in op.d;lO@
the far field. .lr5!Stb
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface ) P%4:P
or rays Incident on a surface. Missed rays are a collection of all rays that “leave” '-.wFB;
the model and “go off to infinity.” Exiting rays are the collection of ray segments {!r#f(?uT
following the intersection point of a ray at a surface. Due to ray splitting, several h;nQxmJ9
ray segments may contribute to the candela data for each incident ray. Incident =|"= l1
rays are the collection of ray segments which intersect the selected surface. No C5MqwNX
surface selection is required for Missed rays but one is necessary for Exiting and #QS?s8IrW
Incident rays. MnS+ nH!d
The candela plots represent flux versus angle and can be smoothed using the xh r[ A
Candela Options dialog box. The iso-candela plots can be presented as false FB_NkXR
color maps or contour plots. The distribution plots are graphs of cross-sectional \OY}GR Kt
curves through the candela distribution. 9DPb|+O-
The orientation of the candela plots is determined by the Normal Vector and the .6Fsw
Up Vector, as specified in the Analysis|Candela Options dialog box. The &Sa~/!M
normal vector specifies the axis of the candela plot and the up vector specifies x 'mF&^
“which way is up.”
