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.