This is a 31.5 mm diameter Plano-Convex lens, manufactured by Qioptiq Photonics, a leading provider of precision optics. The lens is made of N-BK7, a popular glass type known for its excellent optical properties, and has a focal length of 80mm, making it suitable for a wide range of applications.
The lens features a spherical geometry with a radius of curvature of 41.568 on the convex side. The edge thickness is 1.9mm, while the center thickness is 5mm, providing a good balance between weight and optical performance. The lens is coated with Qio Bbar Arb2nirnbk7 on both the front and back surfaces, enhancing its durability and performance in the 725-1050nm wavelength range.
This lens is mounted, making it ready for immediate use in your optical system. The web link provided leads to the product page on Qioptiq's website, where you can find more information and check the current availability.