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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric V^qkHm e
units, a luminous intensity plot is in units of candelas (lumens per steradian). In H* vd
radiometric units, an intensity plot is in units of watts per steradian. Candela plots 7N}==T89[
are commonly used in the design of illumination systems, especially those used in Q} kXxud
the far field. OQ*rxL cA
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface $ pfN0/`(
or rays Incident on a surface. Missed rays are a collection of all rays that “leave” b";D*\=x
the model and “go off to infinity.” Exiting rays are the collection of ray segments V8+8?5'l
following the intersection point of a ray at a surface. Due to ray splitting, several dc%0~Nz
ray segments may contribute to the candela data for each incident ray. Incident QRAw#
rays are the collection of ray segments which intersect the selected surface. No Is#w=s}2
surface selection is required for Missed rays but one is necessary for Exiting and *k<{ nj@y
Incident rays. al {}p
The candela plots represent flux versus angle and can be smoothed using the UwVc!Lys
Candela Options dialog box. The iso-candela plots can be presented as false q.Vcb!*$
color maps or contour plots. The distribution plots are graphs of cross-sectional l t{yo\
curves through the candela distribution. =`fz#Mfd
The orientation of the candela plots is determined by the Normal Vector and the @;g|styh^
Up Vector, as specified in the Analysis|Candela Options dialog box. The VZEDBZ x*
normal vector specifies the axis of the candela plot and the up vector specifies uM74X^U
“which way is up.”
