This is a 095-3125R-250 protected silver plano-concave spherical mirror, with a diameter of 50.8 mm and a thickness of 10 mm at the edge. The mirror is designed for use at a wavelength of 400 nm and features a UVFS protected silver coating on the front surface, identified as EKS 0025protsil 4000.
The mirror's concave shape, defined by a radius of curvature (R1) of -250 mm, provides a focal length of -125 mm. This negative focal length indicates that the mirror is a diverging mirror, which spreads out light rays that hit it. The mirror is made from UVFS mal-1965 material, which is specifically designed for use in ultraviolet applications.
This mirror is sourced from EKSMA Optics, a leading vendor in the field of optical components. According to the vendor's information, the mirror is currently in stock and available for immediate purchase. For more detailed information, please refer to the vendor's website at https://eksmaoptics.com/optical-components/metallic-mirrors/protected-silver-mirrors/.