This is a 091-0230R+400 Protected Gold Spherical Plano-Convex Mirror, sourced from EKSMA Optics. The mirror has a circular base shape with a diameter of 12.7 mm and a thickness of 6 mm at the center. It is designed for use with a wavelength of 900 nm and features a spherical geometry with a radius of curvature (R1) of 400 mm.
The mirror is made of N-BK7 Schott, a popular optical glass due to its excellent optical properties, including high transparency in the visible and near-infrared spectral regions. The front surface of the mirror is coated with EKS 0030protgold900, a protected gold coating that provides high reflectivity in the near-infrared region.
The mirror's effective focal length (EFL) is 200 mm, making it suitable for various optical applications. The item data indicates that this product is in stock and available for immediate purchase. For more information, you can refer to the vendor's website provided in the item data.