The 47-837 is a 5 mm diameter, 1 mm thick flat window made from UVFS material, specifically UVFS Mal-1965. This protective window is designed for use within the visible light spectrum, with a central wavelength of 587.6 nm. The window features a standard curve coating on both the front and back surfaces, identified as EDM VIS-0. This coating is provided by the vendor, Edmund Optics, and is intended to enhance the window's performance within the specified wavelength range. The window's geometry is defined by its circular shape and thin lens design. According to the vendor's website, the window is currently in stock, making it readily available for immediate use.