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

S-LAH97

Wavelength:
µm

(0.280 – 2.400)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.0273018λ^2}{λ^2-0.0183406129}+\frac{0.989293564λ^2}{λ^2-0.00371264195}+\frac{1.25781057λ^2}{λ^2-87.85105}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 2.65e-06 1.16e-08 -7.77e-12 4.9e-07 4.77e-10 0.207 nd: 1.755000 Vd: 52.318818 density: 4.17 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 5.8e-06 K^{-1}dPgF: -0.0094 climatic_resistance: 2.0 acid_resistance: 51.2 phosphate_resistance: 2.0

### Comments

Recommended

### References

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

See also OHARA glass data sheets