This is a 15.0mm diameter by 22.5mm focal length plano-convex lens, specifically designed for use in the near-infrared (NIR) spectrum. The lens is sourced from Edmund Optics, a reputable vendor known for their high-quality optical components.
The lens is made from n-SF5 Schott, a material well-suited for NIR applications due to its low absorption and dispersion characteristics. The lens geometry includes a 1.4mm edge thickness and a 4mm center thickness, with a 12.11mm radius of curvature on the convex side. The effective focal length (EFL) is 18mm, and the back focal length (BFL) is 15.61mm.
The lens features a standard NIR-II coating on both the front and back surfaces, which is designed to enhance transmission in the 750-1550nm range. This coating helps to minimize reflection and absorption losses, thereby improving the overall efficiency and performance of the lens in NIR applications.