This is a G311323525 model lens from Qioptiq Photonics, a renowned vendor in the field of precision optics. The lens, which has a base shape of a circle, is a symmetric convex-convex spherical lens, specifically designed for use in the optical industry.
The lens has a diameter of 25.4 mm and a thickness at the edge of 5 mm, while the thickness at the center is 7 mm. The effective focal length (EFL) of this lens is 80 mm, making it suitable for a wide range of applications. The lens is made from N-BK7, a popular type of glass manufactured by Schott, known for its excellent optical properties.
The lens is designed to work within the wavelength range of 587.6 nm. It comes with a coating on both the front and back surfaces. The coating is Qio Bbar Arb2nirnbk7, which is specifically designed to enhance the performance of the lens.
Please note that the inner and outer radii of the lens are 0, indicating that this is a simple lens without any additional curvature or features. The lens is currently in stock and available for purchase on the Qioptiq Photonics website.