Optical constants of OHARA - BAL (Barium, low-index)
BAL12
Wavelength:
µm
(0.340–0.9)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.339135-0.009645053λ^{2}+0.01072238λ^{-2}+0.0007185158λ^{-4}-6.911301\text{×}10^{-05}λ^{-6}+3.543402\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 3.2683e-06 0.0 0.0 0.0 0.0 0.0 nd: 1.539955 Vd: 59.454008 glass_code: 540595 glass_status: preferred density: 2.75 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 8.3e-06 K-1 - temperature_range: 20 300 °C coefficient: 1.01e-05 K-1 dPgF: -0.001
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets