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