This is a 091-0130R-100 12.7 mm Dia. N-BK7 Protected Gold Spherical Plano-Concave Mirror, sourced from EKSMA Optics. The mirror has a base shape of a circle with a diameter of 12.7 mm and a thickness edge of 6 mm. It is designed with a spherical geometry, featuring a radius of curvature (R1) of -100 mm, and an effective focal length (EFL) of -50 mm.
The mirror is made of N-BK7 Schott, a popular optical glass known for its excellent optical properties. It is coated with a protected gold coating (eks 0030protgold900) on the front side, specifically designed for a central wavelength of 900 nm. This coating ensures high reflectivity and durability, making it suitable for various applications.
For more information about this product, please refer to the vendor's website at https://eksmaoptics.com/optical-components/metallic-mirrors/protected-gold-mirrors/. The link has been verified and the product is currently in stock.