The FS-w-50.8-5 is a flat window type optical element, sourced from Alkor Technologies, with a circular base shape and a diameter of 50.8 mm. This window is designed for use in the visible light spectrum, specifically at a wavelength of 633 nm. The window has a thickness of 5 mm and is made from UVFS material with the Mal-1965 material ID.
The window is uncoated, which means it does not have any additional layers applied to its surface to alter its optical properties. This can be beneficial in certain applications where a natural optical surface is required. The window's geometry is that of a thin lens, which suggests it may have some slight focusing properties, although this is not its primary function.
The FS-w-50.8-5 is available from Alkor Technologies and is currently in stock, according to the weblink provided. For more information, please refer to the vendor's website.