This is a 091-3215R+50 12.7 mm Dia. UVFS Protected Aluminium Spherical Plano-Convex Mirror, with a thickness of 6mm and a center wavelength of 300nm. The mirror is sourced from the reputable vendor, EKSMA Optics, and is currently in stock.
The mirror is a curved mirror of the convex type, with a base shape of a circle. It has a diameter of 12.7mm and a thickness center of 6mm. The effective focal length (EFL) of the mirror is 25mm, and the radius of curvature (R1) is 50mm.
The mirror is made of UVFS Mal- 1965 material, which is a type of aluminium. The front surface of the mirror is coated with EKS 0015protal 3000, which is a specific coating designed for this type of mirror.
The mirror's shape is spherical, which is a common shape for mirrors used in optical systems. This mirror is designed to be used at a single wavelength of 300nm, making it suitable for applications that require precise optical performance at this wavelength.
For more information about this mirror, please refer to the vendor's website at https://eksmaoptics.com/optical-components/metallic-mirrors/protected-aluminium-mirrors/.