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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric rl&.|;5uH;
units, a luminous intensity plot is in units of candelas (lumens per steradian). In atmW? Z
radiometric units, an intensity plot is in units of watts per steradian. Candela plots z-:>[Sn
are commonly used in the design of illumination systems, especially those used in k*!iUz{]
the far field. P2| +7D:
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface qQ6@43TC
or rays Incident on a surface. Missed rays are a collection of all rays that “leave” 5uOz #hN
the model and “go off to infinity.” Exiting rays are the collection of ray segments 0 \s&;@xKk
following the intersection point of a ray at a surface. Due to ray splitting, several Q1x15pVku/
ray segments may contribute to the candela data for each incident ray. Incident F2ISg'
rays are the collection of ray segments which intersect the selected surface. No 9\T9pjdZE
surface selection is required for Missed rays but one is necessary for Exiting and 2;J\Z=7
Incident rays. >oaL -01i
The candela plots represent flux versus angle and can be smoothed using the TCIbPs E
Candela Options dialog box. The iso-candela plots can be presented as false ;*ULrX4[
color maps or contour plots. The distribution plots are graphs of cross-sectional K5t.OAA:
curves through the candela distribution. ] 0MuX iR
The orientation of the candela plots is determined by the Normal Vector and the qZ
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Up Vector, as specified in the Analysis|Candela Options dialog box. The 8 ?x:PkK
normal vector specifies the axis of the candela plot and the up vector specifies ?Zk;NL9
“which way is up.”
