This is a 097-0125FR-800 76.2 mm Dia. N-BK7 Enhanced Silver Plano-Concave Spherical Mirror, available from EKSMA Optics. The mirror has a diameter of 76.2 mm and a thickness of 12.7 mm at the edge. It is designed for use with a wavelength of 800 nm and features a front coating of eks enhsil600110045.
The mirror is concave in shape, with a radius of curvature (R1) of -800 mm. This results in an effective focal length (EFL) of -400 mm, making it suitable for use in various optical systems where a concave mirror is required.
The mirror is made of N-BK7, a popular optical glass from Schott. This material is known for its excellent optical properties, making it a common choice for a wide range of optical applications.
According to the vendor's website, this item is currently in stock. For more information, please refer to the provided weblink.