Normalize FqUt uN
Normalize the map data to the total emitted flux from all sources. #HuA(``[d
This option allows you to have the flux and irradiance normalized to the total BfE- s<
emitted flux. When this box is checked, TracePro divides the values in the nk3< ]u
irradiance map and the total flux by the emitted flux. This is especially useful for +l?ro[#6&.
calculating system transmittance for an optical system, or lighting efficiency for a ,f0g|5yDf
lighting calculation. \y )4`A
Example 1: System Transmittance oJJ k
Suppose you need to calculate the system transmittance of an optical system. rD
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You would probably use the grid raytrace option, and the emitted flux is equal to g&F<Uv#mZ
the sum of the flux in all the emitted rays. When you display an irradiance map, +$QL0|RL
the system transmittance is equal to the total flux, displayed at the bottom of the rUpAiZfz >
irradiance map window, divided by the emitted flux. To get the system hUhp2ibEs
transmittance, check the Normalize to emitted flux box and press the Apply j _9<=Vu
button. The map will be redisplayed, and the Normalized Flux value will be equal &|\}\+0Z
to the system transmittance. 07"Oj9NlA
Example 2: Lighting Efficiency s>``-
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Suppose you need to calculate the lighting efficiency of a luminaire in illuminating U8$dG)PhA
a plane. You would probably choose the Surface Source raytrace option, and the I;Fy
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emitted flux is equal to the flux you specified when you defined the sources. When - QI`npsnV
you display an irradiance map, the total flux incident on the observation plane is sAN:C{
displayed at the bottom of the window. The lighting efficiency is equal to the total I+d(r"N1
flux divided by the emitted flux. To get the lighting efficiency directly, check the Hr*Pi3 dSI
Normalize to emitted flux box and press the Apply button. The map will be Mi rBJL
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency
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of the luminaire.
