Normalize >#Ue`)d`aY
Normalize the map data to the total emitted flux from all sources. xh`4s
This option allows you to have the flux and irradiance normalized to the total cy
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emitted flux. When this box is checked, TracePro divides the values in the J[ 7Sf^r
irradiance map and the total flux by the emitted flux. This is especially useful for ,?/AIL]_
calculating system transmittance for an optical system, or lighting efficiency for a .TpM3b#r
lighting calculation. o<8SiVC2
Example 1: System Transmittance 3 =-XA2zJ
Suppose you need to calculate the system transmittance of an optical system. H05xt$J
You would probably use the grid raytrace option, and the emitted flux is equal to ' |Ia-RbX
the sum of the flux in all the emitted rays. When you display an irradiance map, *1c1XN<7
the system transmittance is equal to the total flux, displayed at the bottom of the 6s(.ul
irradiance map window, divided by the emitted flux. To get the system _A]=45cn~
transmittance, check the Normalize to emitted flux box and press the Apply X 3q2XU
button. The map will be redisplayed, and the Normalized Flux value will be equal bJ5 VlK67R
to the system transmittance. q'1
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Example 2: Lighting Efficiency
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Suppose you need to calculate the lighting efficiency of a luminaire in illuminating `),ACkU>U
a plane. You would probably choose the Surface Source raytrace option, and the =GJ)4os
emitted flux is equal to the flux you specified when you defined the sources. When
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you display an irradiance map, the total flux incident on the observation plane is h"ZR`?h
displayed at the bottom of the window. The lighting efficiency is equal to the total bBg=X}9
flux divided by the emitted flux. To get the lighting efficiency directly, check the |kK_B
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Normalize to emitted flux box and press the Apply button. The map will be ]Mb:zs<r
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency @aY>pr5!
of the luminaire.