RefractiveIndex.INFO Refractive index database

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Optical constants of BK7
H-K9L (CDGM)

Wavelength: µm
 (0.365 – 0.7065)  
 

Other optical constants

logX   logY   eV

Dispersion formula

$$n^2=2.2702566-9.1988101\text{×}10^{-3}λ^{2}+1.1609706\text{×}10^{-2}λ^{-2}-7.6123911\text{×}10^{-5}λ^{-4}+2.8558727\text{×}10^{-5}λ^{-6}-1.2566486\text{×}10^{-6}λ^{-8}$$

Comments

Refractive index is relative to air at standard conditions; Wavelength in dispersion formula is as measured in air and expressed in micrometers

Data

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

References

CDGM Optical Glass Products Database

More info - wiki

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