Germanium dioxide is well-known as a glass-forming material; it has the ability to form tetrahedral units (similar to those formed by silicon dioxide). Since the cation-to-anion ratio of GeO2 is in the right range, many GeO2 based compositions form glasses on melting and cooling.
The different forms of GeO2 (vitreous, hexagonal, tetragonal) lead to different corresponding infra-red spectra, but all are optically transparent over a wide spectral range between 280 nm and 5000 nm.
In addition, GeO2 based glasses have a higher coefficient of thermal expansion than silica- or boron-based glasses, and thus provide for a much better performance when vacuum seals (to brass or copper) are required.
Pure germanium is used for lenses and windows in IR systems that operate at even higher wavelengths (from 2 to 12 microns).
Gallium and gallium oxide can be used to increase the refractive index of glass and are used in the manufacture of lenses and optical mirrors. Optical mirrors made from gallium have high reflectivity and are stable at high temperatures.
Optical Lens Technical Documents
No whitepapers to display
No presentations to display
No application notes to display
Product Data Sheets
No product data sheets to display
Safety Data Sheets
No safety data sheets to display
Indium Corporation Blog Posts
Autonomous (driverless, self-driving) cars will require unprecedented software and hardware reliability. Let's explore.
Lucia is our 2016 Marcom intern. Here is her perspective after working at Indium Corporation for 9 weeks.
I don't believe smartwatches will survive. Here are my reasons why.
Product Manager of Compounds
From One Engineer to Another®
All of Indium Corporation’s products and solutions are designed to be commercially available
unless specifically stated otherwise.