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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric ?Ja&LNI9S
units, a luminous intensity plot is in units of candelas (lumens per steradian). In 5kbbeO|0G
radiometric units, an intensity plot is in units of watts per steradian. Candela plots ;eQOBGX9
are commonly used in the design of illumination systems, especially those used in G}8Zkz@+
the far field. G>>TB{}
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface ,UE>@;]
or rays Incident on a surface. Missed rays are a collection of all rays that “leave”
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the model and “go off to infinity.” Exiting rays are the collection of ray segments 5wgeA^HE2y
following the intersection point of a ray at a surface. Due to ray splitting, several '7;b+Vbl#
ray segments may contribute to the candela data for each incident ray. Incident guc[du
rays are the collection of ray segments which intersect the selected surface. No >u R0 Xs;V
surface selection is required for Missed rays but one is necessary for Exiting and LUN"p#1
Incident rays. jS c!"Trl]
The candela plots represent flux versus angle and can be smoothed using the 5@&{%99
Candela Options dialog box. The iso-candela plots can be presented as false ^P p2T
color maps or contour plots. The distribution plots are graphs of cross-sectional S #{gCc
curves through the candela distribution. #ssSs]zl
The orientation of the candela plots is determined by the Normal Vector and the >xB[k-C4
Up Vector, as specified in the Analysis|Candela Options dialog box. The vn"+x_
normal vector specifies the axis of the candela plot and the up vector specifies n oL&>G
“which way is up.”
