Normalize uYW4$6S 3
Normalize the map data to the total emitted flux from all sources. 0aT:Gy;
This option allows you to have the flux and irradiance normalized to the total t FU4%c7V
emitted flux. When this box is checked, TracePro divides the values in the A;cA|`b
irradiance map and the total flux by the emitted flux. This is especially useful for +.cpZqWn3
calculating system transmittance for an optical system, or lighting efficiency for a :8S;34Y;
lighting calculation. }i9:k kfq2
Example 1: System Transmittance N2:Hdu :
Suppose you need to calculate the system transmittance of an optical system. y_P A9#v7
You would probably use the grid raytrace option, and the emitted flux is equal to cXX Z'y>FP
the sum of the flux in all the emitted rays. When you display an irradiance map, G1 |1Z5r
the system transmittance is equal to the total flux, displayed at the bottom of the ?XKX&ws
irradiance map window, divided by the emitted flux. To get the system T CT8O U|
transmittance, check the Normalize to emitted flux box and press the Apply pl8b&bLzi
button. The map will be redisplayed, and the Normalized Flux value will be equal |n_N.Z
to the system transmittance. *%uz LW0
Example 2: Lighting Efficiency 0 kJ8H!~u
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating .zb
a plane. You would probably choose the Surface Source raytrace option, and the _\AQJ?< M
emitted flux is equal to the flux you specified when you defined the sources. When _hnsH
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you display an irradiance map, the total flux incident on the observation plane is WZa6*pF
displayed at the bottom of the window. The lighting efficiency is equal to the total V#G)w~
flux divided by the emitted flux. To get the lighting efficiency directly, check the T;M
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Normalize to emitted flux box and press the Apply button. The map will be &M- vKc"d
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency VQIvu)I
of the luminaire.
