Optical constants of CDGM - FK (Fluor crown)
D-FK61A-25
Wavelength:
µm
(0.290–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.714581002λ^2}{λ^2-0.0108378966}+\frac{0.502174967λ^2}{λ^2-0.00132310137}+\frac{0.838296164λ^2}{λ^2-153.775939}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -1.94e-05 2.54e-09 -2.83e-11 3.05e-07 -9.31e-11 0.242
nd: 1.496650
Vd: 81.549116
glass_code: 497816
glass_status: standard
density: 3.68 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 1.26e-05 K-1
- temperature_range: 20 300 °C
coefficient: 1.55e-05 K-1
dPgF: 0.0309
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