This is a mounted plano-convex lens, type G063824331, with a diameter of 25.4 mm, sourced from Qioptiq Photonics. The lens is made of N-BK7, a popular optical glass from Schott, and features a front coating of qio al ralvis aoi 45 and a back coating of qio al ralvis aoi 45.
The lens's geometry is characterized by a thickness of 3 mm at the edge and 4 mm at the center, with an effective focal length (EFL) of 150 mm. The radius of curvature (R1) is 78.298 mm, while the inner and outer radii are 0 mm. The lens's shape is spherical, and it is designed for use at a wavelength of 588 nm.
The lens is currently in stock and available for purchase on the Qioptiq Photonics website. The provided weblink leads directly to the product page for easy access and ordering.