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Optical constants of OHARA - BAL (Barium, low-index)
L-BAL35
Wavelength:
µm
(0.3 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.1626263λ^2}{λ^2-0.0125957437}+\frac{0.325661051λ^2}{λ^2+0.0032691105}+\frac{1.35132486λ^2}{λ^2-119.214596}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 5.03e-06 1.22e-08 -3.81e-11 4.93e-07 5.76e-10 0.16
nd: 1.589130
Vd: 61.152601
glass_code: 589612
density: 2.82 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.1e-06 K-1
dPgF: -0.0043
climatic_resistance: 3.0
acid_resistance: 52.2
phosphate_resistance: 3.2
Comments
Low Softening Temperature
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets