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irradiance in the image space of an optical system


irradiance in the back focal plane of an optical system illuminated by a source at infinity


Caution
Fill in all cells except one.
Choose all parameters unit.
The illuminated surface is supposed to be perpendicular to the optical axis and its dimensions as well as the aperture are assumed to be small regarding fi.
All parameters are positive.

ParameterValueunit
L
D
fi
T
Es
irradiance in the back focal plane of an optical system illuminated by a source at infinity
L : radiance of the light source D : aperture diameter of the optical system fi : effective focal length of the optical system T : transmission ratio of the optical system Es : irradiance in the illuminated part of the back focal plane

Note
This calculation page can not detect all unrealistic inputs.



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