Normalize 16>uD;G
Normalize the map data to the total emitted flux from all sources. XZInu5(
This option allows you to have the flux and irradiance normalized to the total 3XnXQ/({
emitted flux. When this box is checked, TracePro divides the values in the #'8PFw\zw
irradiance map and the total flux by the emitted flux. This is especially useful for 8Vn6* Xn
calculating system transmittance for an optical system, or lighting efficiency for a }j?S?= ;m=
lighting calculation. *X\c
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Example 1: System Transmittance 5);#\&B
Suppose you need to calculate the system transmittance of an optical system. % p9bl ,x
You would probably use the grid raytrace option, and the emitted flux is equal to a
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the sum of the flux in all the emitted rays. When you display an irradiance map, !{Y#<tG]
the system transmittance is equal to the total flux, displayed at the bottom of the ]#$kA9
irradiance map window, divided by the emitted flux. To get the system Q] wM /7
transmittance, check the Normalize to emitted flux box and press the Apply hwzUCh 5!
button. The map will be redisplayed, and the Normalized Flux value will be equal pPZ/ O 6
to the system transmittance. 7f ay:_
Example 2: Lighting Efficiency '- IT@}
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating AD\<}/3U
a plane. You would probably choose the Surface Source raytrace option, and the HD{`w1vcN
emitted flux is equal to the flux you specified when you defined the sources. When &-fx=gq=
you display an irradiance map, the total flux incident on the observation plane is @?m8/t9 .
displayed at the bottom of the window. The lighting efficiency is equal to the total N%f!B"NQ
flux divided by the emitted flux. To get the lighting efficiency directly, check the sAoM=n}!
Normalize to emitted flux box and press the Apply button. The map will be V]]qu:Mh8
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency `z_7[$\~
of the luminaire.
