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Optical constants of OHARA - NBH (Niobate, high-index)
L-NBH54
Wavelength:
µm
(0.37 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{2.00722652λ^2}{λ^2-0.0135705124}+\frac{0.442086773λ^2}{λ^2-0.0591808873}+\frac{3.37287426λ^2}{λ^2-219.832665}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 3.5e-07 6.74e-09 -1.38e-11 1.01e-06 1.37e-09 0.298
nd: 1.902000
Vd: 25.101413
glass_code: 902251
glass_status: special
density: 3.64 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 8.1e-06 K-1
- temperature_range: 20 300 °C
coefficient: 9.9e-06 K-1
dPgF: 0.0108
climatic_resistance: 4.0
acid_resistance: 2.0
phosphate_resistance: 1.0
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