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## Optical constants of OHARA - LAL (Lanthanum, low-index)

S-LAL54Q

Wavelength:
µm

(0.310 – 2.400)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{0.920085087λ^2}{λ^2-0.0160829667}+\frac{0.758646115λ^2}{λ^2-0.00292059306}+\frac{1.07073096λ^2}{λ^2-85.12112}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 8.26e-06 1.35e-08 1.67e-11 4.28e-07 4.05e-10 0.205 nd: 1.651000 Vd: 56.238379 density: 3.36 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 4.3e-06 K^{-1}dPgF: -0.0085 climatic_resistance: 2.0 acid_resistance: 4.0 phosphate_resistance: 3.0

### Comments

Recommended

### References

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

See also OHARA glass data sheets