Normalize G#@#j]8
Normalize the map data to the total emitted flux from all sources. RlU ?F
This option allows you to have the flux and irradiance normalized to the total w5rtYT I
emitted flux. When this box is checked, TracePro divides the values in the Ey%[t
irradiance map and the total flux by the emitted flux. This is especially useful for lbw+!{Ch
calculating system transmittance for an optical system, or lighting efficiency for a $sZ4r>-
lighting calculation. g
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Example 1: System Transmittance =|dm#w_L"
Suppose you need to calculate the system transmittance of an optical system. /v| b]Ji
You would probably use the grid raytrace option, and the emitted flux is equal to ;=E}Pb Zt2
the sum of the flux in all the emitted rays. When you display an irradiance map, RBg2iG$ 8|
the system transmittance is equal to the total flux, displayed at the bottom of the ~m0=YAlk?
irradiance map window, divided by the emitted flux. To get the system S4_ZG>\VT
transmittance, check the Normalize to emitted flux box and press the Apply *f{ 4 _ts
button. The map will be redisplayed, and the Normalized Flux value will be equal k.Gt }\6zP
to the system transmittance. Y5B! *+h
Example 2: Lighting Efficiency rg#/kd<?[V
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating ;~WoJlEK3
a plane. You would probably choose the Surface Source raytrace option, and the /L 2n
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emitted flux is equal to the flux you specified when you defined the sources. When B<h4ZK%
you display an irradiance map, the total flux incident on the observation plane is DYC2bs>
displayed at the bottom of the window. The lighting efficiency is equal to the total X7:Dw]t
flux divided by the emitted flux. To get the lighting efficiency directly, check the ,I+O;B:0
Normalize to emitted flux box and press the Apply button. The map will be T nyLVIP
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency @{Fa=".Ch
of the luminaire.
