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## Optical constants of OHARA - NBH (Niobate, high-index)

S-NBH56

Wavelength:
µm

(0.3 – 2.4)

### Complex refractive index (*n+ik)*

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.85191438λ^2}{λ^2-0.013273262}+\frac{0.431102852λ^2}{λ^2-0.0585944644}+\frac{3.45278284λ^2}{λ^2-239.357089}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 4.95e-08 7.56e-09 -3.2e-11 1.01e-06 1.32e-09 0.299 nd: 1.854779 Vd: 24.798980 density: 3.49 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.7e-06 K^{-1}dPgF: 0.0109 climatic_resistance: 3.0 acid_resistance: 1.0 phosphate_resistance: 1.0

### Comments

Recommended

### References

OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)

See also OHARA glass data sheets