Normalize K??%Qh5l+C
Normalize the map data to the total emitted flux from all sources. .xS3,O_[
This option allows you to have the flux and irradiance normalized to the total 7dyGC:YuTL
emitted flux. When this box is checked, TracePro divides the values in the 8VQJUwf;
irradiance map and the total flux by the emitted flux. This is especially useful for 4G"T{A`O
calculating system transmittance for an optical system, or lighting efficiency for a
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lighting calculation. wkOo8@J\
Example 1: System Transmittance 8u
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Suppose you need to calculate the system transmittance of an optical system. srXGe`VL
You would probably use the grid raytrace option, and the emitted flux is equal to ZgQ4~s
the sum of the flux in all the emitted rays. When you display an irradiance map, eu@hmR8T
the system transmittance is equal to the total flux, displayed at the bottom of the |b7 v(Hx
irradiance map window, divided by the emitted flux. To get the system `9E:V=
transmittance, check the Normalize to emitted flux box and press the Apply )8VrGg?
button. The map will be redisplayed, and the Normalized Flux value will be equal 3}e-qFlV8,
to the system transmittance. 3B!lE (r%J
Example 2: Lighting Efficiency j&,,~AZm
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating k FE2Vv4.
a plane. You would probably choose the Surface Source raytrace option, and the xpCzx=n3.m
emitted flux is equal to the flux you specified when you defined the sources. When [y-0w.V=oE
you display an irradiance map, the total flux incident on the observation plane is s\y+ xa:
displayed at the bottom of the window. The lighting efficiency is equal to the total T;K@3]FbX
flux divided by the emitted flux. To get the lighting efficiency directly, check the )w (-Xc?P
Normalize to emitted flux box and press the Apply button. The map will be Wj.f$U 4
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency Dg3S n|!f
of the luminaire.
