Optical constants of OHARA - BSL (Borosilicate, low-index)
BSL7Y
Wavelength:
µm
(0.29–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.13329383λ^2}{λ^2-0.00669407868}+\frac{0.136897201λ^2}{λ^2-0.023739176}+\frac{0.703456004λ^2}{λ^2-70.7030316}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 2.6e-06 1.69e-08 -4.86e-11 4.34e-07 5.54e-10 0.162 nd: 1.516330 Vd: 64.243778 glass_code: 516643 density: 2.5 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 6.8e-06 K-1 - temperature_range: 20 300 °C coefficient: 8.1e-06 K-1 dPgF: -0.0031 climatic_resistance: 1.0 acid_resistance: 1.0 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
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 |