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

S-LAH63

Wavelength:
µm

(0.34 – 2.4)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.89458276λ^2}{λ^2-0.0102277048}+\frac{0.268702978λ^2}{λ^2-0.0442801243}+\frac{1.45705526λ^2}{λ^2-104.874927}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 6.2e-06 1.43e-08 -3.96e-12 8.21e-07 7.44e-10 0.216 nd: 1.804398 Vd: 39.586150 glass_code: 804396 density: 4.34 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 5.8e-06 K^{-1}- temperature_range: 20 300 °C coefficient: 7e-06 K^{-1}dPgF: -0.0045 climatic_resistance: 1.0 acid_resistance: 4.2 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