## Optix.eXpert

Optix.eXpert is our new website that aims at connecting optical professionals with employers looking to outsource optics related work. Sign up and post a listing now to start offering a service.

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

S-LAL54

Wavelength:
µm

(0.33 – 2.4)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.41910189λ^2}{λ^2-0.00726647428}+\frac{0.258416881λ^2}{λ^2-0.0263842499}+\frac{1.07385537λ^2}{λ^2-102.555463}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -1.76e-06 1.3e-08 -3.27e-11 3.37e-07 4.72e-10 0.262 nd: 1.650996 Vd: 56.163717 glass_code: 651562 density: 3.82 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.1e-06 K^{-1}- temperature_range: 20 300 °C coefficient: 8.3e-06 K^{-1}dPgF: -0.0024 climatic_resistance: 3.0 acid_resistance: 53.0 phosphate_resistance: 4.2

### Comments

Recommended

### References

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

See also OHARA glass data sheets