Optical Materials

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Product Catalog 2017

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Transmission range
340 nm ~ 2000 nm
Thermal Expansion Coefficient
7,3x10-6 C-1, for -30/+70 C
Specific Heat Capacity
Capacity 0.858 x 103 J / (kg x °C)
2,51 g/cm3
Price list
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Attention! You can customise this product to your needs.
BK7 is a borosilicate crown optical glass with high homogeneity and low bubble and inclusion content. Its good physical and chemical properties, inexpensiveness make it widely used in visible and NIR large variety optical components: windows, lenses or prisms.

BK7 Refractive Index

Wavelength, MicronsRefractive Index
0,4047 1,53024
0,4800 1,52283
0,5893 1,51673
0,6563 1,51432
0,7065 1,51289
0,8521 1,50981
1,0600 1,50669
1,5296 1,50094
1,9700 1,49500
2,3254 1,48929

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Laser optics direct from stock. All products are inspected at metrology laboratory, certified and delivered worldwide direct from European Union.