Normalize (Nf B+Ue}
Normalize the map data to the total emitted flux from all sources. x+%> 2qgj"
This option allows you to have the flux and irradiance normalized to the total 6kR3[]:16v
emitted flux. When this box is checked, TracePro divides the values in the \f Kn} ]kG
irradiance map and the total flux by the emitted flux. This is especially useful for d0%Wz5Np
calculating system transmittance for an optical system, or lighting efficiency for a |7Z}#eP//
lighting calculation. h?4E VOx+
Example 1: System Transmittance 9Ou}8a?m"
Suppose you need to calculate the system transmittance of an optical system. -cn`D2RP
You would probably use the grid raytrace option, and the emitted flux is equal to ?/,V{!UTtq
the sum of the flux in all the emitted rays. When you display an irradiance map, h;#^?v!+
the system transmittance is equal to the total flux, displayed at the bottom of the }9z$72;Qdq
irradiance map window, divided by the emitted flux. To get the system Lq6nmjL
transmittance, check the Normalize to emitted flux box and press the Apply \>.[QQVI"l
button. The map will be redisplayed, and the Normalized Flux value will be equal AhjCRYk+
to the system transmittance. U_Mag(^-
Example 2: Lighting Efficiency [? ,+DY
Suppose you need to calculate the lighting efficiency of a luminaire in illuminating ;8e}X6YU
a plane. You would probably choose the Surface Source raytrace option, and the 9 MQwc
emitted flux is equal to the flux you specified when you defined the sources. When Dcs O~mg
you display an irradiance map, the total flux incident on the observation plane is &:g1*+
displayed at the bottom of the window. The lighting efficiency is equal to the total ?TW? 2+
flux divided by the emitted flux. To get the lighting efficiency directly, check the & K=) YpT
Normalize to emitted flux box and press the Apply button. The map will be ]*)l_mut7
redisplayed, and the Normalized Flux value will be equal to the lighting efficiency %|R]n B
of the luminaire.
