Optical constants of SCHOTT - BaK (Barium crown)
N-BAK4HT
Wavelength:
µm
(0.334–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.28834642λ^2}{λ^2-0.00779980626}+\frac{0.132817724λ^2}{λ^2-0.0315631177}+\frac{0.945395373λ^2}{λ^2-105.965875}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 3.06e-06 1.44e-08 -2.23e-11 5.46e-07 6.05e-10 0.189
nd: 1.56883
Vd: 55.98
glass_code: 569560.305
glass_status: standard
density: 3.046 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.99e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.93e-06 K-1
dPgF: -0.001
climatic_resistance: 1.0
stain_resistance: 0.0
acid_resistance: 1.2
alkali_resistance: 1.0
phosphate_resistance: 1.0
Comments
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets