Optical constants of CDGM - BAK (Barium crown)
H-BAK4
Wavelength:
µm
(0.280 – 2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.559279457λ^2}{λ^2-0.0017275627}+\frac{0.985286498λ^2}{λ^2-97.8673314}+\frac{0.818059461λ^2}{λ^2-0.0135929957}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
- type: "Schott formula"
coefficients: 9.33e-07 2.01e-08 -2.04e-11 3.94e-07 2.14e-10 0.158
nd: 1.552480
Vd: 63.365490
glass_code: 552634
density: 2.9 g/cm3
thermal_expansion:
- temperature_range: -30 70 ℃
coefficient: 6.1e-06 K-1
- temperature_range: 20 300 ℃
coefficient: 7.6e-06 K-1
dPgF: -0.0009
climatic_resistance: 2.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets