This is the 10D20ER.4, a 25.4 mm diameter Borofloat broadband metallic mirror with a thickness of 6mm. The mirror is protected by a gold coating, designed to reflect light within the wavelength range of 650-20000nm.
The mirror is sourced from the reputable vendor, MKS/Newport, and is currently in stock. You can find more information about this product, including its technical specifications and pricing, on their official website via the provided weblink: https://www.newport.com/p/10D20ER.4.
The mirror is classified as a metallic mirror, a type of mirror that uses a metal coating to reflect light. The coating on this mirror is protected, ensuring its longevity and durability. The mirror's geometry is that of a thin lens, making it suitable for a wide range of optical applications.
The mirror's material is Borofloat33, a type of glass known for its high thermal resistance and excellent transmission properties. This makes the mirror ideal for use in high-temperature environments and applications where clear, undistorted light transmission is crucial.