This is a 092-3130R-8000 UVFS Protected Gold Spherical Plano-Concave Mirror, sourced from EKSMA Optics. The mirror has a base shape of a circle with a diameter of 25.4 mm and a thickness edge of 6 mm. The mirror's geometry is spherical, with a radius of curvature (R1) of -8000 mm, resulting in an effective focal length (EFL) of -4000 mm.
The mirror is made from UVFS material, specifically UVFS mal- 1965, and is designed to operate at a wavelength of 900 nm. The front surface of the mirror is coated with eks 0030protgold900, a protected gold coating, which enhances its reflectivity and durability.
This mirror is available for purchase from EKSMA Optics, as indicated by the "weblink status" field in the item data. For more information, you can visit the vendor's website through the provided weblink.