This is a mounted plano-convex lens, type G052115329, from Qioptiq Photonics. The lens has a diameter of 12.7 mm and a thickness of 2.7 mm at the edge, with a center thickness of 3 mm. The effective focal length (EFL) of this lens is 150 mm, specifically designed for use with a wavelength of 588 nm.
The lens is made of N-BK7, a popular optical glass from Schott, known for its excellent optical properties. The lens's front and back surfaces are coated with Qio HP Nbar ARHS-YAG, a high-performance anti-reflective coating designed for use with YAG lasers.
The lens's geometry is spherical, with a radius of curvature of 77.179 mm on the curved surface. The lens is mounted, making it ready for immediate use in your optical system. The weblink provided leads to the product page on Qioptiq's website, where you can find more information and check the current availability of the lens.