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

S-LAH60

Wavelength:
µm

(0.34 – 2.4)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.95243469λ^2}{λ^2-0.0106442437}+\frac{0.30710021λ^2}{λ^2-0.0456735302}+\frac{1.56578094λ^2}{λ^2-110.28141}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 6.88e-06 1.25e-08 -3.24e-11 6.63e-07 7.1e-10 0.271 nd: 1.834000 Vd: 37.160487 glass_code: 834372 density: 4.43 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 5.6e-06 K^{-1}- temperature_range: 20 300 °C coefficient: 7.1e-06 K^{-1}dPgF: -0.0037 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