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

S-LAH65VS

Wavelength:
µm

(0.310 – 2.400)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.76068422λ^2}{λ^2-0.00853607198}+\frac{0.414128906λ^2}{λ^2-0.0301826383}+\frac{1.33415439λ^2}{λ^2-98.09421}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 2.45e-06 9.57e-09 -3.91e-13 6.2e-07 6.32e-10 0.215 nd: 1.804000 Vd: 46.527532 density: 4.46 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 6.1e-06 K^{-1}dPgF: -0.0085 climatic_resistance: 2.0 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