Optix.eXpert is our new website that aims at connecting optical professionals with employers looking to outsource optics related work. Sign up and fill out a short form to start offering your service!

## Optical constants of OHARA - BAL (Barium, low-index)

S-BAL2

Wavelength:
µm

(0.34 – 2.4)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.30923813λ^2}{λ^2-0.00838873953}+\frac{0.114137353λ^2}{λ^2-0.0399436485}+\frac{1.17882259λ^2}{λ^2-140.257892}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -4.92e-06 1.14e-08 -3.59e-11 5.24e-07 7.01e-10 0.247 nd: 1.570989 Vd: 50.799858 glass_code: 571508 density: 2.89 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 9.1e-06 K^{-1}- temperature_range: 20 300 °C coefficient: 1.09e-05 K^{-1}dPgF: -0.0005 climatic_resistance: 3.0 acid_resistance: 1.0 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