This is a 25.4 mm diameter flat mirror from UltraFast Innovations (UFI), a division of Edmund Optics. The mirror is designed for use with extreme ultraviolet (EUV) light at a wavelength of 19nm. It features a 5° angle of incidence (AOI) and a multilayer coating specifically designed for attosecond EUV applications.
The mirror has a thickness of 6.35mm and is made from a material identified as UVFS MAL-1965. The coating on the front surface is EDM UFI-EUV AOI 5 19, which is optimized for EUV applications at a 5° AOI. The mirror is designed to be used as a thin lens.
According to the vendor, Edmund Optics, this item is in stock and available for immediate shipping. The item's webpage provides more detailed specifications and additional images. This mirror is part of Edmund Optics' extensive catalog of optical elements, which includes a wide variety of mirrors, lenses, and other optical components.