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photometry
luminous flux transmitted through an aperture


luminous flux from a plane lambertian source through a circular angular aperture


Caution
Fill in all input cells.
Choose all parameters unit.
All parameters are positive.
It is assumed that the light source emits on one side only.

InputValueunit
S
L
teta
OutputValueUnit
Pto be calculated
Tto be calculated
luminous flux from a plane lambertian source through a circular angular aperture
S : surface area of the light source L : radiance of the light source teta : half of the aperture angle P : luminous flux transmitted through the aperture T : ratio of luminous flux transmitted through the aperture

Note
This calculation page can not detect all unrealistic inputs.



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