Optical constants of OHARA - NPH (Niobophosphate, high-index)
S-NPH53
Wavelength:
µm
(0.36–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.85484904λ^2}{λ^2-0.0134621486}+\frac{0.396194484λ^2}{λ^2-0.0631945361}+\frac{2.43512461λ^2}{λ^2-170.864886}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -4.85e-06 9.27e-09 -2.86e-11 9.57e-07 1.4e-09 0.304 nd: 1.846660 Vd: 23.883950 glass_code: 847239 density: 3.78 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.4e-06 K-1 - temperature_range: 20 300 °C coefficient: 9e-06 K-1 dPgF: 0.019 climatic_resistance: 1.0 acid_resistance: 2.3 phosphate_resistance: 1.0
Comments
Improved XMT at 370-420
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets