This is a 63.5 mm diameter Germanium Flat Window, offered by Alkor Technologies. The window, which has a thickness of 3mm, is uncoated, providing users with a straightforward, unaltered optical experience.
Germanium, the material of choice for this window, is known for its excellent transmission properties in the infrared region, specifically at 10600 nanometers. This makes it an ideal choice for applications that operate within this spectrum.
The window is circular in shape, a common design that allows for versatile application. It is also thin, which can be beneficial in reducing weight and minimizing optical path differences.
For more information about this product, including its availability and pricing, please refer to the vendor's website at http://www.alkor.net/germanium_windows_catalog.html.