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Refractive index database

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Optical constants of OHARA - BSL (Borosilicate, low-index)
BSL7

Wavelength: µm
 (0.334 – 2.325)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.2697665-0.0096395197λ^{2}+0.011025458λ^{-2}+7.9465126\text{×}10^{-05}λ^{-4}+1.0120957\text{×}10^{-05}λ^{-6}-4.4096694\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 25.0 °C
n_d: 1.516330
V_d: 64.150145
glass_code: 516642
glass_status: preferred
coefficient_of_thermal_expansion_1: 7.4e-06 K-1

References

OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA 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


Ohara Group

Ohara Group is an international group of companies with headquarters in Japan and subsidiaries in Japan (Ohara, Inc.), United States (Ohara Corporation), and Germany (Ohara, GmbH). Ohara manufactures optical and electronic products and also offers measurement services, in particular measurement of refractive indices of solids and liquids.

External links


Glass

External links