Planck Radiation Law
Radiance of a blackbody

Radiance
L = c1ν3 / {exp(c2 ν / T) -1 }

first radiation constant
c1 = 1.191 042 869 x 10-16 W m2 sr-1

second radiation constant
c2 = 1.438 7770 x 10-2 m K

T = temperature [K]
ν = wavenumber [cm-1]
L (mW / ( m2 cm-1 sr ))
ν (cm-1)
T: K,  ν von cm-1 bis cm-1
Radiance calculation T: K
ν: cm-1    

L: mW / ( m2 cm-1 sr )

Temperature calculation L: mW / ( m2 cm-1 sr )
ν: cm-1     

T: K

Planck Radiation Law