091-0130R-50 12.7 mm Dia. N-BK7 Protected Gold Spherical Plano-Concave Mirror; t=6mm 900nm

This 091-0130R-50 mirror is a curved mirror with a concave base shape and a spherical geometry. It is sourced from EKSMA Optics, a reputable vendor in the optical components industry. The mirror has a diameter of 12.7 mm and a thickness edge of 6 mm, making it a compact and robust option for various applications.

The mirror's material is N-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties. This material is widely used in various optical systems due to its low coefficient of thermal expansion, high transmittance in the visible and near-infrared regions, and high chemical resistance.

The mirror features a protected gold coating (eks 0030protgold900) on the front side. This coating provides high reflectivity in the near-infrared region, specifically at 900 nm, making it suitable for applications that require high reflectance at this wavelength. The protected gold coating also offers excellent durability and resistance to oxidation and tarnish, ensuring the mirror's longevity and reliability.

The mirror's effective focal length (EFL) is -25 mm, indicating that it is a negative or concave meniscus lens. This type of lens is often used to converge light rays, making it ideal for focusing and imaging applications. The mirror's radius of curvature (R1) is -50 mm, further emphasizing its concave nature.