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

S-LAH95

Wavelength:
µm

(0.360 – 2.400)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{2.15636617λ^2}{λ^2-0.012288051}+\frac{0.329558178λ^2}{λ^2-0.0555507835}+\frac{1.72178935λ^2}{λ^2-124.43934}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 9.86e-07 1.06e-08 -1.51e-11 9.56e-07 1.15e-09 0.265 nd: 1.903659 Vd: 31.343065 density: 4.64 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.3e-06 K^{-1}dPgF: 0.0055 climatic_resistance: 1.0 acid_resistance: 4.0 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