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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 °C
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 °C
coefficient: 1e-05 K-1
- temperature_range: 20 300 °C
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