48-298 25mm Dia. x 125mm FL; Uncoated; UV Double-Convex Lens

The 48-298 is a 25mm diameter, 125mm focal length uncoated UV double-convex lens, sourced from the reputable optical vendor, Edmund Optics. This lens is a spherical lens with a convex-convex base shape and a circular geometry, designed for use in a wide range of optical applications.

The lens's geometry features a diameter of 25mm, with a center thickness of 3.42mm and an edge thickness of 2.05mm. The effective focal length (EFL) is 125mm, and the back focal length (BFL) is 123.82mm. The first radius of curvature (R1) is 114.08mm, and the second radius of curvature (R2) is -114.08mm. The inner and outer radii are both 0mm.

The lens is made from fused silica, identified as 'fused sil mal-1965' in the material database. This material is known for its excellent transmittance across a wide spectrum, including the ultraviolet (UV) range, making this lens particularly suitable for UV applications.

The lens is uncoated, meaning it does not have any additional layers to enhance its optical properties. While this may result in a slightly lower transmission rate and increased susceptibility to environmental factors, it also means the lens is more cost-effective and suitable for applications where such coatings are not necessary.

Please note that the lens's specifications are optimized for a wavelength of 587.6nm. This wavelength falls within the visible light spectrum and is often used as a reference wavelength in optical calculations.