給個(gè)英文的.個(gè)人理解可能會(huì)有點(diǎn)出入.基本上是這個(gè)意思. }yup`R
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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric 7]t$t3I`
units, a luminous intensity plot is in units of candelas (lumens per steradian). In seh1(q?Va4
radiometric units, an intensity plot is in units of watts per steradian. Candela plots uV r6tb1
are commonly used in the design of illumination systems, especially those used in Y_3 {\g|x
the far field. Bb^CukS:
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface B w1ir
or rays Incident on a surface. Missed rays are a collection of all rays that “l(fā)eave” ;iJ*.wVq
the model and “go off to infinity.” Exiting rays are the collection of ray segments yUF<qB
following the intersection point of a ray at a surface. Due to ray splitting, several _ RT3Fk
ray segments may contribute to the candela data for each incident ray. Incident {=W TAgP
rays are the collection of ray segments which intersect the selected surface. No C%LRb{|d
surface selection is required for Missed rays but one is necessary for Exiting and EQDs bG0x
Incident rays. C%ibIcm y
The candela plots represent flux versus angle and can be smoothed using the A)/
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Candela Options dialog box. The iso-candela plots can be presented as false CeD O:J=,
color maps or contour plots. The distribution plots are graphs of cross-sectional ,E{z+:Es
curves through the candela distribution. '!*,JG5_
The orientation of the candela plots is determined by the Normal Vector and the H#IJ&w|
Up Vector, as specified in the Analysis|Candela Options dialog box. The \|\ Dc0p}
normal vector specifies the axis of the candela plot and the up vector specifies $Q,Fr;
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“which way is up.”
