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Optical constants of HIKARI - BK (Borosilicate crown)
E-BK7

Wavelength: µm
 (0.280 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.271192-0.00966126763λ^{2}+0.0110306969λ^{-2}+7.00379964\text{×}10^{-05}λ^{-4}+1.39658544\text{×}10^{-05}λ^{-6}-7.62560454\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 23.0 °C
nd: 1.516800
Vd: 64.108694
glass_code: 517641
glass_status: preferred
density: 2.51 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 8.8e-06 K-1
dPgF: -0.0011

References

NIKON Zemax catalog 2017-11 (obtained from http://www.nikon.com)
See also HIKARI glass data sheets

Data

[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]

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


Glass

External links