给个英文的.个人理解可能会有点出入.基本上是这个意思. m2\\!C]f
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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric Tv DSs])
units, a luminous intensity plot is in units of candelas (lumens per steradian). In h(HpeN%`#
radiometric units, an intensity plot is in units of watts per steradian. Candela plots Qdq;C,}Ai.
are commonly used in the design of illumination systems, especially those used in hm1s~@oEm
the far field. XnZ$%?$
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface ]]PNYa
or rays Incident on a surface. Missed rays are a collection of all rays that “leave” UeO/<ml3>J
the model and “go off to infinity.” Exiting rays are the collection of ray segments "00j]e.
following the intersection point of a ray at a surface. Due to ray splitting, several PGJh>[s
ray segments may contribute to the candela data for each incident ray. Incident \{ @m
rays are the collection of ray segments which intersect the selected surface. No xrPZy*Y,
surface selection is required for Missed rays but one is necessary for Exiting and <"5l<E
Incident rays. =U3S"W %
The candela plots represent flux versus angle and can be smoothed using the |CDM(g>%
Candela Options dialog box. The iso-candela plots can be presented as false zsXgpnlHT
color maps or contour plots. The distribution plots are graphs of cross-sectional %NrH\v{7Q
curves through the candela distribution. dn#I,xa`
The orientation of the candela plots is determined by the Normal Vector and the uaF-3
Up Vector, as specified in the Analysis|Candela Options dialog box. The ,Q-,#C"
normal vector specifies the axis of the candela plot and the up vector specifies BA c+T
“which way is up.”