给个英文的.个人理解可能会有点出入.基本上是这个意思. C<!%VHs
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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric L< MIl[z7
units, a luminous intensity plot is in units of candelas (lumens per steradian). In qTA@0fL
radiometric units, an intensity plot is in units of watts per steradian. Candela plots fP41 B
are commonly used in the design of illumination systems, especially those used in *D: wwJ
the far field. C 0\A
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface MQR@(>TZy
or rays Incident on a surface. Missed rays are a collection of all rays that “leave” i,=CnZCh
the model and “go off to infinity.” Exiting rays are the collection of ray segments fJ[(zjk
following the intersection point of a ray at a surface. Due to ray splitting, several 3P1OyB
ray segments may contribute to the candela data for each incident ray. Incident ,q
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rays are the collection of ray segments which intersect the selected surface. No 90%alG 1>y
surface selection is required for Missed rays but one is necessary for Exiting and )'{ :4MX
Incident rays. MB,;HeP!
The candela plots represent flux versus angle and can be smoothed using the `I.Uw$,P
Candela Options dialog box. The iso-candela plots can be presented as false C7ZU)MEUd/
color maps or contour plots. The distribution plots are graphs of cross-sectional ?]S !-6:
curves through the candela distribution. :tu_@3bg-
The orientation of the candela plots is determined by the Normal Vector and the ni#!Gxw
Up Vector, as specified in the Analysis|Candela Options dialog box. The \-mz[ <ep
normal vector specifies the axis of the candela plot and the up vector specifies a7#J af
“which way is up.”
