## 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 - LAM (Lanthanum, medium-index)

S-LAM66

Wavelength:
µm

(0.35 – 2.4)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.92094221λ^2}{λ^2-0.0115075241}+\frac{0.219901208λ^2}{λ^2-0.0547993543}+\frac{1.72705231λ^2}{λ^2-120.133674}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 2.83e-07 9.65e-09 -2.68e-11 7.96e-07 1e-09 0.263 nd: 1.800999 Vd: 34.967403 glass_code: 801350 density: 3.55 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.9e-06 K^{-1}- temperature_range: 20 300 °C coefficient: 9.5e-06 K^{-1}dPgF: 0.0015 climatic_resistance: 1.0 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