Optical constants of CDGM - FK (Fluor crown)
D-FK61-25
Wavelength:
µm
(0.280–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.894432499λ^2}{λ^2-0.00436678978}+\frac{0.321652123λ^2}{λ^2-0.0141909741}+\frac{0.748704285λ^2}{λ^2-149.771388}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -2.45e-05 -2.09e-09 -6.72e-13 3.69e-07 2.37e-10 0.173
nd: 1.496530
Vd: 81.531772
glass_code: 497815
density: 3.9 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 1.45e-05 K-1
- temperature_range: 20 300 °C
coefficient: 1.7e-05 K-1
dPgF: 0.0321
climatic_resistance: 1.0
Comments
anneal rate:25°C/h
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets