This is a 092-3130R-2500 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 of 6 mm at the edge. The mirror's geometry is spherical, with a radius of curvature (R1) of -2500 mm, resulting in a focal length of -1250 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 the EKSMA Optics website, where you can find more detailed specifications and related products. The link to the product page is provided in the item data for your convenience.