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Optical constants of BK7
N-BK7 (SCHOTT)

Wavelength: µm  (0.3 – 2.5)    

Refractive index[ i ]

n =

Extinction coefficient[ i ]

k =

Other optical constants


Dielectric constants[ i ]

ϵ1 =
ϵ2 =

Absorption coefficient[ i ]   [ i ]

α = cm-1

Abbe number[ i ]

Vd =

Chromatic dispersion[ i ]

dn/dλ = µm-1

Group velocity dispersion[ i ]   [ i ]   [ i ]

GVD = fs2/mm
D = ps/(nm km)
n   k   log   eV

Dispersion formula [ i ]

$$n^2-1=\frac{1.03961212λ^2}{λ^2-0.00600069867}+\frac{0.231792344λ^2}{λ^2-0.0200179144}+\frac{1.01046945λ^2}{λ^2-103.560653}$$

Data

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

References

1) SCHOTT optical glass data sheets 2012-12-04
2) SCHOTT Zemax catalog 2012-12-04

Optical transmission calculator

Thickness: 
Calculation method: 

Transmittance (at  µm)[ i ]

T =

Reflection calculator

Angle of incidence (0~90°): 
Direction: in out

Reflectance (at µm)[ i ]

RS = (S-polarized)
RP = (P-polarized)
R = (non-polarized, (RS+RP)/2 )

Reflection phase[ i ]

ɸ = °
ɸS = °
ɸP = °

Brewster's angle[ i ]

θB = °

Critical angle[ i ]   [ i ]

θC = °

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 E-BK7
CDGM H-K9L
HOYA BSC7
SUMITA K-BK7
LZOS K8

External links