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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric %j].'
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units, a luminous intensity plot is in units of candelas (lumens per steradian). In |~!
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radiometric units, an intensity plot is in units of watts per steradian. Candela plots 8F$b/Z
are commonly used in the design of illumination systems, especially those used in imx/hz!
the far field. XUD/\M oV
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface kRs24 =
or rays Incident on a surface. Missed rays are a collection of all rays that “leave” 26fm }QV
the model and “go off to infinity.” Exiting rays are the collection of ray segments !b O8apn
following the intersection point of a ray at a surface. Due to ray splitting, several o W)M&$oS
ray segments may contribute to the candela data for each incident ray. Incident LzE AA{
rays are the collection of ray segments which intersect the selected surface. No 7Q<uk[d0
surface selection is required for Missed rays but one is necessary for Exiting and Yx_[vLm
Incident rays. q8: Z.<%8
The candela plots represent flux versus angle and can be smoothed using the :E|HP#iwu
Candela Options dialog box. The iso-candela plots can be presented as false PmtBu`OkV
color maps or contour plots. The distribution plots are graphs of cross-sectional vqLC?{i+
curves through the candela distribution. o7feH 6Sh
The orientation of the candela plots is determined by the Normal Vector and the \/jr0):
Up Vector, as specified in the Analysis|Candela Options dialog box. The v+Vp ak9|
normal vector specifies the axis of the candela plot and the up vector specifies (/&IBd-
“which way is up.”
