Optical constants of OHARA - BAL (Barium, low-index)
BAL11
Wavelength:
µm
(0.360–0.9)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.433807-0.009321052λ^{2}+0.01397331λ^{-2}+0.0001804732λ^{-4}+7.763637\text{×}10^{-06}λ^{-6}-1.184873\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 3.5762e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.572501
Vd: 57.760854
glass_code: 573578
glass_status: preferred
density: 3.09 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.2e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.6e-06 K-1
dPgF: -0.0018
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets
Data
INFO
BAK1 optical glass
BAK1 is a very popular optical glass. Most glass makers produce this or very similar glass.BAK1 or similar glasses produced by different makers
| Maker | Glass |
|---|---|
| Schott | N-BAK1 |
| Hikari | E-BAK1 |
| Ohara | S-BAL11 |
| CDGM | H-BAK8 |