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

L-LAH86

Wavelength:
µm

(0.360 – 2.400)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{2.11102709λ^2}{λ^2-0.0120714135}+\frac{0.370368094λ^2}{λ^2-0.0532464416}+\frac{1.62687484λ^2}{λ^2-109.166396}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 2.69e-06 1.07e-08 -9.48e-12 8.91e-07 1.11e-09 0.274 nd: 1.902699 Vd: 31.005320 density: 4.9 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 6.1e-06 K^{-1}dPgF: 0.003 climatic_resistance: 3.0 acid_resistance: 4.2 phosphate_resistance: 2.0

### Comments

Low Softening Temperature

### References

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

See also OHARA glass data sheets