Normalize *sw7niw
Normalize the map data to the total emitted flux from all sources. CZ<~3bEF
This option allows you to have the flux and irradiance normalized to the total q.#[TI ^
emitted flux. When this box is checked, TracePro divides the values in the px;/8 c-
irradiance map and the total flux by the emitted flux. This is especially useful for w
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calculating system transmittance for an optical system, or lighting efficiency for a ->^~KVh&
lighting calculation. %dST6$Z
Example 1: System Transmittance 5kypMHJm
Suppose you need to calculate the system transmittance of an optical system. FQz?3w&ia
You would probably use the grid raytrace option, and the emitted flux is equal to +pm[f["C.
the sum of the flux in all the emitted rays. When you display an irradiance map, A3N]8?D
the system transmittance is equal to the total flux, displayed at the bottom of the 8~ lIe:F-
irradiance map window, divided by the emitted flux. To get the system }x0- V8
transmittance, check the Normalize to emitted flux box and press the Apply =sJ
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button. The map will be redisplayed, and the Normalized Flux value will be equal 4Y> Yi*n
to the system transmittance. %V`F!D<D
Example 2: Lighting Efficiency I` K$E/ns
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating Yap?^&GV
a plane. You would probably choose the Surface Source raytrace option, and the *l+OlQI0+
emitted flux is equal to the flux you specified when you defined the sources. When B+d<F[ |
you display an irradiance map, the total flux incident on the observation plane is *^\HU=&
displayed at the bottom of the window. The lighting efficiency is equal to the total *OJ/V O
flux divided by the emitted flux. To get the lighting efficiency directly, check the 51C2u)HE
Normalize to emitted flux box and press the Apply button. The map will be <h) .fX
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency o X@ya3!Pz
of the luminaire.
