This is a 25mm diameter x 30mm focal length NIR I coated double-convex lens, available from Edmund Optics. The lens is designed for use in the near-infrared spectrum, specifically between 600-1050nm.
The lens is spherical in shape, with a base shape of circular. The geometry of the lens includes a thickness of 1.41mm at the edge and 5.5mm at the center. The effective focal length (EFL) is 30mm, and the radii of curvature are 39.22mm for the first surface and -39.22mm for the second surface. The back focal length (BFL) is 28.31mm.
The lens is made from n-SF5 Schott, a material known for its excellent optical properties. It features a standard NIR I coating on both the front and back surfaces, which is designed to enhance transmission in the near-infrared region.
This lens is currently in stock and can be purchased directly from the Edmund Optics website. It is a versatile and high-performing option for applications that require a lens in the near-infrared spectrum.