G063105525 31.5 mm Dia. N-BK7 Mounted Plano-Convex Lens; EFL=200mm 725-1050nm

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, making it suitable for a wide range of applications.

The lens features a focal length (EFL) of 200mm, which is the distance from the lens's principal point to the point where the light rays converge. This makes it a medium to long-focus lens, ideal for imaging or beam shaping applications where a larger working distance is required.

The lens has a clear aperture of 31.5 mm, providing a good balance between light gathering capability and field of view. The edge thickness is 2 mm, while the center thickness is 3.2 mm, ensuring structural rigidity and minimal optical distortion.

The lens is coated with Qio Bbar Arb2nirnbk7 on both the front and back surfaces. This anti-reflection coating reduces surface reflections, improving transmission and reducing ghosting and flare. The coating is optimized for a wavelength of 588 nm, but it also provides good performance across the 725-1050 nm range.

The lens is spherical in shape, meaning it has a constant radius of curvature. This simple geometry ensures excellent image quality and low aberration, making it suitable for high precision applications.