small lambertian source at finite distance - slightly opened optical sys

small lambertian source at finite distance - slightly opened optical system

irradiance on a surface

direct illumination lambertian source at infinity punctual sourcemiscellaneous direct illumination vs illumination through an optical system – source at infinitysource and screen conjugated by an optical system lambertian source at infinity - aperture defined with aperture diameter lambertian source at infinity - aperture defined with F number small lambertian source at finite distance - slightly opened optical systemsource in the front focal plane of an optical system punctual source with given intensity punctual source with given optical power small source with given radiance

.../ irradiance on a surface / source and screen conjugated by an optical system / small lambertian source at finite distance - slightly opened optical system

INPUT	VALUE	UNIT	VARIABLE	MIN	MAX	STEPS
Lr
D
fi
T
x

OUTPUT	VALUE	UNIT
Er	to be calculated