LD4148-UV 6 mm Dia. UVFS Double-Concave Lens; EFL=-12mm 245-400nm

The LD4148-UV is a spherical lens with a base shape of a circle, sourced from the reputable vendor Thorlabs. This lens falls under the category of a Spherical Lens (Concave-Concave) and is designed for use in the ultraviolet (UV) spectrum, specifically at a wavelength of 588nm.

The lens has a diameter of 6mm and a center thickness of 3mm. The effective focal length (EFL) is -12mm, indicating that it is a double-concave lens. The first radius of curvature (R1) is -11.5mm, and the second radius of curvature (R2) is 11.5mm. The inner and outer radii are both 0mm.

The lens is made from UVFS material with the ID 1965. It features a UV-grade broadband anti-reflection coating on both the front and back surfaces, denoted as "tho uvfs uv bbar". This coating enhances the lens's performance in the UV range, making it suitable for applications that require high transmission and low reflection in this spectrum.

Please note that the weblink provided leads to Thorlabs' product page for the LD4148-UV, and it indicates that the product is currently in stock. This information is subject to change, so it's always a good idea to check the vendor's website for the most up-to-date availability.