| lightgirl |
2008-08-22 13:58 |
Normalize CNP!v\D
Normalize the map data to the total emitted flux from all sources. TC [(mf:8
This option allows you to have the flux and irradiance normalized to the total ( $s%5|
emitted flux. When this box is checked, TracePro divides the values in the 2E7vuFH4c
irradiance map and the total flux by the emitted flux. This is especially useful for d7(g=JK<
calculating system transmittance for an optical system, or lighting efficiency for a Ix~_.&
lighting calculation. Q AN :
Example 1: System Transmittance eI99itDQ
Suppose you need to calculate the system transmittance of an optical system. ^phgNzD
You would probably use the grid raytrace option, and the emitted flux is equal to d!>.$| b
the sum of the flux in all the emitted rays. When you display an irradiance map, F Lf< gz
the system transmittance is equal to the total flux, displayed at the bottom of the b &]_5 GGc
irradiance map window, divided by the emitted flux. To get the system :]]#X
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transmittance, check the Normalize to emitted flux box and press the Apply `hpX 97v
button. The map will be redisplayed, and the Normalized Flux value will be equal uUmk k
to the system transmittance. }K F f
Example 2: Lighting Efficiency *BdKQ/Dk
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating K3g<NC
a plane. You would probably choose the Surface Source raytrace option, and the naOCa
emitted flux is equal to the flux you specified when you defined the sources. When }(MI}o}
you display an irradiance map, the total flux incident on the observation plane is dbVMG-z8
displayed at the bottom of the window. The lighting efficiency is equal to the total $F&m('aB8
flux divided by the emitted flux. To get the lighting efficiency directly, check the V7~tIhuJH
Normalize to emitted flux box and press the Apply button. The map will be z.d1>w
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency bn*SLWWQ.3
of the luminaire.
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