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A candela plot is a plot of luminous intensity, or flux per solid angle. In photometric -d=WV:G%e
units, a luminous intensity plot is in units of candelas (lumens per steradian). In a9Y5
radiometric units, an intensity plot is in units of watts per steradian. Candela plots .F2:!h$
are commonly used in the design of illumination systems, especially those used in VR0=SE
the far field. bw S*]!*
Candela data can be collected from ray sets of Missed rays, rays Exiting a surface >:
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or rays Incident on a surface. Missed rays are a collection of all rays that “leave” vhgLcrn
the model and “go off to infinity.” Exiting rays are the collection of ray segments =RsXI&&vh
following the intersection point of a ray at a surface. Due to ray splitting, several f.xA_Y>
ray segments may contribute to the candela data for each incident ray. Incident "![L#)"s
rays are the collection of ray segments which intersect the selected surface. No .*5 Z"Q['G
surface selection is required for Missed rays but one is necessary for Exiting and B\CN<<N>dD
Incident rays. ',=g;
The candela plots represent flux versus angle and can be smoothed using the #wR;|pN
Candela Options dialog box. The iso-candela plots can be presented as false 8e2?tmWM
color maps or contour plots. The distribution plots are graphs of cross-sectional A :e;k{J
curves through the candela distribution. j*R,m1e8
The orientation of the candela plots is determined by the Normal Vector and the J/x2qQ$9
Up Vector, as specified in the Analysis|Candela Options dialog box. The {?8B,G2r
normal vector specifies the axis of the candela plot and the up vector specifies CIC[1,
“which way is up.”