Optical constants of OHARA - NPH (Niobophosphate, high-index)
S-NPH4
Wavelength:
µm
(0.28–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.93563931λ^2}{λ^2-0.0152585289}+\frac{0.449596478λ^2}{λ^2-0.0696815778}+\frac{2.71828573λ^2}{λ^2-170.327149}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -5.24e-06 9.66e-09 -1.5e-11 1.05e-06 1.53e-09 0.321 nd: 1.892860 Vd: 20.361810 density: 3.61 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.3e-06 K-1 dPgF: 0.0308 climatic_resistance: 1.0 acid_resistance: 1.0 phosphate_resistance: 1.0
Comments
Recommended - High Index
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets