This is a 50.8 mm diameter Germanium Wedge Window, sourced from Alkor Technologies. The window features a thickness of 6mm and a wedge angle of 0.008726646259971648 radians, or approximately 0.5 degrees. The wedge shape is designed to minimize optical aberrations and improve light transmission.
Germanium, the material of choice for this window, is known for its excellent transmission properties in the infrared region of the spectrum. It is particularly suitable for applications involving wavelengths around 633 nanometers. The window is uncoated, meaning it does not have any additional layers applied to enhance its properties or protect it from environmental factors.
For more information about this product, you can refer to the vendor's website at http://www.alkor.net/wedges.html. The link is currently valid and indicates that the product is in stock.