## 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 - BAL (Barium, low-index)

BAL15Y

Wavelength:
µm

(0.3 – 2.4)

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

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.28348331λ^2}{λ^2-0.00790900515}+\frac{0.102800765λ^2}{λ^2-0.0305971274}+\frac{0.404609885λ^2}{λ^2-46.5268356}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 1.61e-06 1.32e-08 -4.12e-11 4.65e-07 5.14e-10 0.201 nd: 1.556711 Vd: 58.679177 glass_code: 557587 density: 2.9 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 7.6e-06 K^{-1}- temperature_range: 20 300 °C coefficient: 9e-06 K^{-1}dPgF: -0.0021 climatic_resistance: 1.0 acid_resistance: 1.2 phosphate_resistance: 1.0

### Comments

Improved XMT at 365

### References

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

See also OHARA glass data sheets