Optical constants of CDGM - BAK (Barium crown)
H-BAK7GT
Wavelength:
µm
(0.320–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.659469741λ^2}{λ^2-0.000766009635}+\frac{0.7621967λ^2}{λ^2-0.0177403402}+\frac{1.19935835λ^2}{λ^2-129.975103}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 6.07e-07 1.74e-08 -3.75e-11 5.69e-07 2.67e-10 0.188
nd: 1.568830
Vd: 56.041308
glass_code: 569560
glass_status: standard
density: 2.83 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.2e-06 K-1
- temperature_range: 20 300 °C
coefficient: 9e-06 K-1
dPgF: -0.0007
climatic_resistance: 2.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets