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

S-LAH53V

Wavelength:
µm

(0.340 – 2.400)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.96600955λ^2}{λ^2-0.0107817785}+\frac{0.205143305λ^2}{λ^2-0.0463727869}+\frac{1.23200934λ^2}{λ^2-97.69406}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 9.36e-06 1.13e-08 -1.33e-11 8.08e-07 8.51e-10 0.236 nd: 1.806099 Vd: 40.929791 density: 4.41 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 5.8e-06 K^{-1}dPgF: -0.0039 climatic_resistance: 1.0 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