LD4293 25.4 mm Dia. UVFS Double-Concave Lens; EFL=-50mm Uncoated

The LD4293 is a spherical lens from Thorlabs, featuring a unique double-concave design with a diameter of 25.4 mm. This lens is specifically designed for use in optical systems where a negative focal length is required. The effective focal length (EFL) of this lens is -50mm, making it a powerful tool for focusing or diverging light beams.

The lens is made from UVFS material, which is a type of optical glass specifically designed for use in the ultraviolet spectrum. This makes the LD4293 particularly suitable for applications where UV light is involved. 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 LD4293 has a center thickness of 3.5 mm and features two concave surfaces with radii of curvature of -46.6 mm and 46.6 mm, respectively. The lens does not have any inner or outer radius, indicating a uniform curvature across its surface.

According to the vendor's website, the LD4293 is currently in stock, making it readily available for immediate use. The website also provides further technical specifications and application notes for this lens, which can be useful for those considering its use in their optical systems.