Normalize pCu!l#J
Normalize the map data to the total emitted flux from all sources. 6ATtW+sN ]
This option allows you to have the flux and irradiance normalized to the total /oL; YIoQX
emitted flux. When this box is checked, TracePro divides the values in the ur\q OX|{
irradiance map and the total flux by the emitted flux. This is especially useful for 7 JDN{ !jT
calculating system transmittance for an optical system, or lighting efficiency for a Dl&GJ`&:p
lighting calculation. ]{
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Example 1: System Transmittance G\;}w
Suppose you need to calculate the system transmittance of an optical system. $3d}"D
You would probably use the grid raytrace option, and the emitted flux is equal to s 1ge0~p3
the sum of the flux in all the emitted rays. When you display an irradiance map, GI7=x h
the system transmittance is equal to the total flux, displayed at the bottom of the Q*YYTmZ
irradiance map window, divided by the emitted flux. To get the system g2R @`./S
transmittance, check the Normalize to emitted flux box and press the Apply 5 #]4YI;
button. The map will be redisplayed, and the Normalized Flux value will be equal T'#!~GpB
to the system transmittance. A;J MV+2N
Example 2: Lighting Efficiency vZ#!uU^a:
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating ,SScf98,j
a plane. You would probably choose the Surface Source raytrace option, and the +y#T?!jQYj
emitted flux is equal to the flux you specified when you defined the sources. When @cq`:_.[
you display an irradiance map, the total flux incident on the observation plane is 9]>iSG^H
displayed at the bottom of the window. The lighting efficiency is equal to the total .la&P,j_L
flux divided by the emitted flux. To get the lighting efficiency directly, check the o+?r I
p
Normalize to emitted flux box and press the Apply button. The map will be GOSI3RRn
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency 70 B)|<$
of the luminaire.
