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## Optical constants of OHARA - LAH (Lanthanum, high-index)

S-LAH63Q

Wavelength:
µm

(0.340 – 2.400)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.96723017λ^2}{λ^2-0.0110456086}+\frac{0.194953915λ^2}{λ^2-0.0497137061}+\frac{1.25386282λ^2}{λ^2-104.84352}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -2.81e-06 9.15e-09 -8.1e-12 7.5e-07 7.86e-10 0.243 nd: 1.804400 Vd: 39.580489 density: 4.45 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.9e-06 K^{-1}dPgF: -0.0012 climatic_resistance: 3.0 acid_resistance: 51.2 phosphate_resistance: 1.0

### References

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

See also OHARA glass data sheets