Optical constants of CDGM - BAK (Barium crown)
H-BAK8
Wavelength:
µm
(0.290 – 2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.845101506λ^2}{λ^2-100.298196}+\frac{1.01452466λ^2}{λ^2-0.00555241848}+\frac{0.418518474λ^2}{λ^2-0.0202280796}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
- type: "Schott formula"
coefficients: 6.29e-08 1.64e-08 -1.82e-11 4.71e-07 4.87e-10 0.223
nd: 1.572500
Vd: 57.486797
glass_code: 573575
density: 3.18 g/cm3
thermal_expansion:
- temperature_range: -30 70 ℃
coefficient: 7.4e-06 K-1
- temperature_range: 20 300 ℃
coefficient: 8.9e-06 K-1
dPgF: -0.001
climatic_resistance: 2.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical 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 |