49-243 9mm Dia. x 18mm FL; Uncoated; UV Double-Convex Lens

The 49-243 is a spherical lens with a base shape of a circle, sourced from the reputable vendor, Edmund Optics. This lens is specifically designed for use in ultraviolet (UV) applications, making it an ideal choice for projects requiring UV light manipulation.

The lens has a diameter of 9mm and a focal length of 18mm, indicated by its EFL (Effective Focal Length) value. The thickness at the edge of the lens is 1.32mm, while the center thickness measures 2.6mm. The lens's inner and outer radii are both zero, suggesting a symmetrical design.

The 49-243 lens is made from fused silica, identified by the Material ID "fused sil mal-1965". This material is known for its high transparency in the UV region, making it suitable for UV applications. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties or protect it from environmental factors.

The lens's geometry is double-convex, meaning it has two spherical surfaces that curve outwards. This design is often used to reduce spherical aberration, a common issue in optical systems. The first radius of curvature (R1) is 16.09mm, and the second radius of curvature (R2) is -16.09mm, indicating that the second surface is concave.

Please note that the wavelength specified is 587.6nm, which is in the visible light spectrum. However, this does not limit the lens's applicability in the UV region, as the lens's material and design are optimized for UV applications.