Optical constants of OHARA - BAL (Barium, low-index)
BAL2
Wavelength:
µm
(0.350 – 0.9)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.424312-0.00858474λ^{2}+0.01472045λ^{-2}+0.0005504561λ^{-4}-3.170738\text{×}10^{-05}λ^{-6}+2.420757\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false wavelength_vacuum: false temperature: 25.0 ℃ thermal_dispersion: - type: "Schott formula" coefficients: 4.152e-06 0.0 0.0 0.0 0.0 0.0 nd: 1.570989 Vd: 50.797474 glass_code: 571508 glass_status: preferred density: 3.1 g/cm3 thermal_expansion: - temperature_range: -30 70 ℃ coefficient: 1e-05 K-1 - temperature_range: 20 300 ℃ coefficient: 1.16e-05 K-1 dPgF: -0.0007
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets