Normalize (pU@$H
Normalize the map data to the total emitted flux from all sources. re$xeq\1P?
This option allows you to have the flux and irradiance normalized to the total V\!6K
emitted flux. When this box is checked, TracePro divides the values in the s5
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irradiance map and the total flux by the emitted flux. This is especially useful for KliMw*5(
calculating system transmittance for an optical system, or lighting efficiency for a " 0:&x
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lighting calculation. eLvbPE_
Example 1: System Transmittance tJ_6dH8Y
Suppose you need to calculate the system transmittance of an optical system. N>+s8L.?
You would probably use the grid raytrace option, and the emitted flux is equal to 3>+9Rru
the sum of the flux in all the emitted rays. When you display an irradiance map, =}$YZuzmU
the system transmittance is equal to the total flux, displayed at the bottom of the G>>`j2:y
irradiance map window, divided by the emitted flux. To get the system N 9.$--X}D
transmittance, check the Normalize to emitted flux box and press the Apply rmzM}T\20
button. The map will be redisplayed, and the Normalized Flux value will be equal fW'@+<b
to the system transmittance. GW29Rj1
Example 2: Lighting Efficiency S m%\,/3
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating {D6E@a
a plane. You would probably choose the Surface Source raytrace option, and the vLc7RL
emitted flux is equal to the flux you specified when you defined the sources. When v}Gpw6
you display an irradiance map, the total flux incident on the observation plane is HkP')= sa
displayed at the bottom of the window. The lighting efficiency is equal to the total :nt 7jm,
flux divided by the emitted flux. To get the lighting efficiency directly, check the 5)T=^"IHXi
Normalize to emitted flux box and press the Apply button. The map will be E!,+#%O>
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency V[w Y;wj
of the luminaire.