Optical constants of HIKARI - BK (Borosilicate crown)
J-BK7
Wavelength:
µm
(0.280–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.27109726-0.00947304881λ^{2}-8.9187152\text{×}10^{-05}λ^{4}+0.0109352525λ^{-2}+0.000136527555λ^{-4}+1.68617824\text{×}10^{-06}λ^{-6}+5.85391298\text{×}10^{-08}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 23.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -7.9571e-09 1.4286e-08 -1.3882e-12 4.674e-07 4.1858e-10 0.17067
nd: 1.516800
Vd: 63.880667
glass_status: preferred
density: 2.52 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.1e-06 K-1
dPgF: -0.0012
phosphate_resistance: 1.0
References
NIKON Zemax catalog 2017-11 (obtained from http://www.nikon.com)
See also HIKARI glass data sheets
Data
INFO
BK7 optical glass
BK7 is a very popular crown glass. Most glass makers produce this glass under slightly different names.Analogs of BK7 glass produced by different makers
| Maker | Glass |
|---|---|
| SCHOTT | N-BK7 |
| OHARA | S-BSL7 |
| HIKARI | J-BK7A |
| CDGM | H-K9L |
| HOYA | BSC7 |
| SUMITA | K-BK7 |
| LZOS | K8 |
External links
Hikari Glass Co., Ltd.
Hikari Glass Co., Ltd. is a Japanese glass maker, a subsidiary of Nikon Corp.External links
- Hikari Glass Co., Ltd. (in Japanese)
- Nikon