This is a G311318400 22.4 mm diameter N-BK7 double-convex lens, with a focal length (EFL) of 100mm. The lens is sourced from Qioptiq Photonics, a renowned vendor in the field of precision optics.
The lens is of the spherical type, specifically a convex-convex lens, and has a base shape of a circle. The diameter of the lens is 22.4mm, with a center thickness of 3.5mm and an edge thickness of 2.3mm. The inner and outer radii are both zero, and the radii of curvature are 104.41mm for both the first and second surfaces.
The lens is made of N-BK7, a popular glass type in the optical industry, known for its excellent optical properties. The glass is Schott's brand, ensuring high quality and reliability.
The lens is designed for use at a wavelength of 587.6nm. It comes with a coating on both the front and back surfaces, specifically Qio Silver Ragv 45. This coating enhances the lens's performance by reducing reflection and increasing transmission.