This is a 31.5 mm diameter Plano-Convex lens, manufactured by Qioptiq Photonics, featuring an effective focal length (EFL) of 80mm and a N-BK7 Schott material ID. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties.
The lens's geometry includes a thickness edge of 1.9mm and a thickness center of 5mm. The inner radius is 0mm, and the outer radius is also 0mm, indicating a simple spherical shape. The curvature radius (r1) is 41.568mm.
According to the provided item data, this lens is in stock and available for purchase on the Qioptiq Photonics website. The web link is valid, leading directly to the product page for this specific lens.