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

S-NBH53

Wavelength:
µm

(0.33 – 2.4)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.6582834λ^2}{λ^2-0.0113872516}+\frac{0.263275666λ^2}{λ^2-0.0522108137}+\frac{2.10142759λ^2}{λ^2-165.523649}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 3.75e-06 9.12e-09 -3.26e-11 8.19e-07 1.05e-09 0.264 nd: 1.737999 Vd: 32.261312 density: 3.28 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 6.9e-06 K^{-1}dPgF: 0.0006 climatic_resistance: 2.0 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