This is a 31.5 mm diameter Plano-Convex lens, manufactured by Qioptiq Photonics, featuring a focal length of 200mm. The lens is made of N-BK7, a popular glass type in the optical industry, known for its excellent optical properties and versatility.
The lens geometry includes a 2mm thickness at the edge and a 3.2mm thickness at the center. The front surface of the lens has a radius of curvature of 104.04mm, while the back surface is flat. The lens is coated with Qio AL RALVIS AOI 45 on both the front and back surfaces, enhancing its performance in specific wavelengths around 588nm.
The lens is spherical in shape, a common choice for many optical applications due to its ease of manufacturing and good imaging quality. The plano-convex design is particularly useful in applications where a collimated beam needs to be focused to a spot, or where a diverging beam needs to be converted into a parallel one.
The item data also indicates that this lens is in stock and available for purchase, with direct links to the vendor's website provided for convenience.