Normalize I{.t-3hp
Normalize the map data to the total emitted flux from all sources. TgJ6O,0
This option allows you to have the flux and irradiance normalized to the total W ,v0~
emitted flux. When this box is checked, TracePro divides the values in the `@vksjxu
irradiance map and the total flux by the emitted flux. This is especially useful for giW9b _
calculating system transmittance for an optical system, or lighting efficiency for a KDA2
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lighting calculation. *Ue#Sade
Example 1: System Transmittance [ UB*39D7
Suppose you need to calculate the system transmittance of an optical system. x {Dw?6TP
You would probably use the grid raytrace option, and the emitted flux is equal to S 1C#5 =
the sum of the flux in all the emitted rays. When you display an irradiance map, ^<
the system transmittance is equal to the total flux, displayed at the bottom of the j7NOYm5N
irradiance map window, divided by the emitted flux. To get the system (<}?}{YX 0
transmittance, check the Normalize to emitted flux box and press the Apply 4-$kc wA
button. The map will be redisplayed, and the Normalized Flux value will be equal <JvYCWX`
to the system transmittance. a( N;| <
Example 2: Lighting Efficiency 6k<3,`VV|
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating ~d ~oC$=TC
a plane. You would probably choose the Surface Source raytrace option, and the j8rxhT oC
emitted flux is equal to the flux you specified when you defined the sources. When ro e_H>
you display an irradiance map, the total flux incident on the observation plane is LW">9 ;n
displayed at the bottom of the window. The lighting efficiency is equal to the total CUBL/U\=
flux divided by the emitted flux. To get the lighting efficiency directly, check the _x, (576~
Normalize to emitted flux box and press the Apply button. The map will be %kgT=<E '
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency |tTcJ\bG
of the luminaire.
