47-915 12mm Dia. x -12mm FL; VIS 0deg Coated; Double-Concave Lens 425-675nm

The 47-915 is a double-concave spherical lens, 12mm in diameter and featuring a focal length of -12mm. This lens, sourced from Edmund Optics, is designed for use within the visible light spectrum, specifically between 425-675nm. The lens's geometry includes an edge thickness of 4.71mm and a center thickness of 3mm, with an effective focal length (EFL) of -12mm. The radii of curvature for the front and back surfaces are -19.47mm and 19.47mm, respectively, and the back focal length (BFL) is -12.81mm.

The lens is made from n-SF11 Schott, a high-index glass with excellent transmittance in the visible spectrum. It features a standard visible coating on both the front and back surfaces, following the VIS 0° curve, which is designed to reduce surface reflections and improve overall transmission.

This lens is a versatile option for applications that require a concave-concave lens shape within the visible light spectrum. Its high-quality construction and precise specifications make it a reliable choice for various optical systems.