Optical constants of SCHOTT - BaK (Barium crown)
N-BAK2
Wavelength:
µm
(0.3–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.01662154λ^2}{λ^2-0.00592383763}+\frac{0.319903051λ^2}{λ^2-0.0203828415}+\frac{0.937232995λ^2}{λ^2-113.118417}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -1.45e-06 1.1e-08 4.89e-12 5.16e-07 3.05e-10 0.164
nd: 1.53996
Vd: 59.71
glass_code: 540597.286
glass_status: standard
density: 2.86 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 8e-06 K-1
- temperature_range: 20 300 °C
coefficient: 9e-06 K-1
dPgF: 0.0004
climatic_resistance: 2.0
stain_resistance: 0.0
acid_resistance: 1.0
alkali_resistance: 1.0
phosphate_resistance: 2.3
Comments
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets