Normalize :|\)=4
Normalize the map data to the total emitted flux from all sources. ky I~
This option allows you to have the flux and irradiance normalized to the total KEo?Cy?%ff
emitted flux. When this box is checked, TracePro divides the values in the t(Gg
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irradiance map and the total flux by the emitted flux. This is especially useful for %H3
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calculating system transmittance for an optical system, or lighting efficiency for a 2 >/}-a
lighting calculation. XvI Y=~
Example 1: System Transmittance qL~|bfN
Suppose you need to calculate the system transmittance of an optical system. V11 XI<V
You would probably use the grid raytrace option, and the emitted flux is equal to ZiC~8p_f
the sum of the flux in all the emitted rays. When you display an irradiance map, &;[e
the system transmittance is equal to the total flux, displayed at the bottom of the zR5KC!xc
irradiance map window, divided by the emitted flux. To get the system .x][ _I >
transmittance, check the Normalize to emitted flux box and press the Apply f{)n xd
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button. The map will be redisplayed, and the Normalized Flux value will be equal Ao$|`Lgj=z
to the system transmittance. Lc_cB`
Example 2: Lighting Efficiency 6xoCB/]
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating o ^" "=Z
a plane. You would probably choose the Surface Source raytrace option, and the 0gH;y+\=*
emitted flux is equal to the flux you specified when you defined the sources. When DeTLh($\
you display an irradiance map, the total flux incident on the observation plane is ahg]OWn#
displayed at the bottom of the window. The lighting efficiency is equal to the total *H~&hs>k
flux divided by the emitted flux. To get the lighting efficiency directly, check the 0X}0,
Normalize to emitted flux box and press the Apply button. The map will be +^ `n- m
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency `_!R;f
of the luminaire.
