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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric [^ sv.
units, a luminous intensity plot is in units of candelas (lumens per steradian). In v%N/mL+5L
radiometric units, an intensity plot is in units of watts per steradian. Candela plots `D)ay
are commonly used in the design of illumination systems, especially those used in k=">2!O/
the far field. 1|/P[!u
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface rS1mBrqD
or rays Incident on a surface. Missed rays are a collection of all rays that “leave” tg%s#lLeH
the model and “go off to infinity.” Exiting rays are the collection of ray segments 4pNIsjl}
following the intersection point of a ray at a surface. Due to ray splitting, several 3>LyEXOW
ray segments may contribute to the candela data for each incident ray. Incident d67Q@ ')00
rays are the collection of ray segments which intersect the selected surface. No k+Ew+j1_
surface selection is required for Missed rays but one is necessary for Exiting and P5
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Incident rays. v[4A_WjT
The candela plots represent flux versus angle and can be smoothed using the Zq w xi1
Candela Options dialog box. The iso-candela plots can be presented as false FgA'X<
color maps or contour plots. The distribution plots are graphs of cross-sectional m]LR4V6k|
curves through the candela distribution. TTB1}j+V6
The orientation of the candela plots is determined by the Normal Vector and the `
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Up Vector, as specified in the Analysis|Candela Options dialog box. The .
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normal vector specifies the axis of the candela plot and the up vector specifies f44b=,Lry5
“which way is up.”
