Glass (BK7 Schott or analogous)

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Optical

Refractive Index at ne 1.51872
Refractive Index at nF' 1.52283
Thermal Coefficient of Refractive Index at 0.546 microns for ±20 °C 2.8 x 10-6
Transmission Range, microns 0.35 - 2.0
 

Thermal

Thermal Linear Expansion, °C-1
for -30/+70 °C		 7.1 x 10-6
Thermal Conductivity, W/(m * °C) 1.114
Specific Heat Capacity, J/(kg * °C) 0.858 x 103
Melting Point, °C 559
 

Mechanical

Density, g/cm3 at 20 °C 2.51
Young Modulus (E), Pa 8.1 x 1010
Poisson Ratio 0.206
 

Ref. Index vs. Wavelength l

Wavelength, Microns Refractive Index
0.365 1.53626
0.4047 1.53024
0.4358 1.52669
0.4800 1.52283
0.4861 1.52238
0.5461 1.51871
0.5876 1.51680
0.5893 1.51673
0.6328 1.51509
0.6438 1.51472
0.6563 1.51432
0.7065 1.51289
0.8521 1.50981
1.0140 1.50731
1.0600 1.50669
1.5296 1.50094
1.9700 1.49500
2.3254 1.48929
 

Internal Transmittance t i (l) vs. Wavelength l

Wavelength, Microns Internal Transmittance for 5mm
0.310 0.59
0.320 0.81
0.350 0.986
0.365 0.994
0.370 0.995
0.380 0.996
0.390 0.998
0.400 0.998
0.420 0.998
0.460 0.999
0.500 0.999
0.700 0.999
1.060 0.999
1.530 0.997
1.970 0.968
2.325 0.89

Custom sizes and specifications are available on request.

Overview of elements with access to our shop

1 18
H
 2 13 14 15 16 17
He
Li Be B C
N
O
F
Ne
Na Mg 3 4 5 6 7 8 9 10 11 12 Al Si P S
Cl
Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se
Br
Kr
Rb Sr Y Zr Nb Mo
Tc
 Ru Rh Pd Ag Cd In Sn Sb Te I
Xe
Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi
Po
At
Ra
Fr
Ra
Ac
Ce Pr Nd
Pm
 Sm Eu Gd Tb Dy Ho Er Tm Yb Lu


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