LB4223-UV 25.4 mm Dia. UVFS Double-Convex Lens; EFL=750mm 245-400nm

The LB4223-UV is a double-convex lens with a diameter of 25.4 mm, sourced from the reputable vendor Thorlabs. This lens is specifically designed for use in the ultraviolet (UV) spectrum, with a wavelength range of 245-400 nm, making it ideal for applications such as UV microscopy, spectroscopy, and other UV-based research and industrial settings.

The lens features an effective focal length (EFL) of 750 mm, which is the distance from the center of the lens to the point at which light rays converge. This long focal length makes the LB4223-UV suitable for applications requiring high magnification and a narrow field of view.

The lens is constructed from UVFS, a material with a high refractive index and low dispersion in the UV range. This ensures excellent image quality, with minimal chromatic aberration. The lens has a front and back coating of THo UVFS UV BBAR, which further enhances its performance in the UV spectrum by reducing surface reflections and increasing transmission.

The geometry of the lens includes a thickness of 2 mm at the edge and 2.2 mm at the center, with a clear aperture of 25.4 mm. The lens's base shape is circular, and its surfaces are spherical, with radii of curvature of 689.8 mm on both the front and back surfaces.