LD4931 25.4 mm Dia. UVFS Double-Concave Lens; EFL=-25mm Uncoated

The LD4931 is a spherical lens from Thorlabs, featuring a unique double-concave design with a diameter of 25.4 mm. This lens is made from UVFS material, specifically UVFS mal- 1965, and is uncoated. The lens has a center thickness of 3 mm and an effective focal length (EFL) of -25 mm, making it a concave-concave lens. The first radius of curvature (R1) is -23.5 mm, while the second radius (R2) is 23.5 mm. The lens's inner and outer radii are both 0 mm.

This lens is designed to operate at a wavelength of 587.6 nm. The uncoated feature of this lens means that it does not have any additional layers to enhance its optical properties. However, it is still a high-quality lens suitable for various applications due to its precise specifications and robust construction.

The LD4931 is currently in stock and available for immediate purchase through the vendor's website. With its unique specifications and high-quality construction, this lens is an excellent choice for users seeking a reliable and precise optical component for their projects.