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Optical constants of OHARA - BAL (Barium, low-index)
S-BAL22
Wavelength:
µm
(0.3 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.16333541λ^2}{λ^2-0.0118079103}+\frac{0.26332321λ^2}{λ^2+0.00438112893}+\frac{1.12551059λ^2}{λ^2-106.905682}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.07e-06 1.47e-08 -3.65e-11 3.9e-07 5.2e-10 0.186
nd: 1.568729
Vd: 63.104860
glass_code: 569631
glass_status: special
density: 3.05 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.5e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.5e-06 K-1
dPgF: -0.0023
climatic_resistance: 3.0
acid_resistance: 51.2
phosphate_resistance: 3.0
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets