542-7225 25.4 mm Dia. x -250 mm FL; Uncoated; Plano-Concave Lens

This is a Plano-Concave Lens, type Spherical Lens, offered by EKSMA Optics. The lens has a diameter of 25.4 mm and a center thickness of 2.5 mm. The effective focal length (EFL) is -250 mm, indicating that it is a diverging lens. The radius of curvature (R1) is -128.075 mm, and the inner and outer radii are both 0 mm, suggesting a simple, uncoated design.

The lens is made of Barium Fluoride (BaF2), identified by the Material ID [baf2 cgdm]. This material is known for its excellent transparency in the ultraviolet (UV) and infrared (IR) regions, making this lens suitable for applications in these spectral ranges. The wavelength specified for this lens is 3000 nm, which falls within the IR region.

Please note that this lens does not have any coating, as indicated by the empty 'coating' field in the item data. This may affect the lens's performance in certain applications, particularly those requiring high transmission or specific surface properties.

For more information, including pricing and availability, please refer to the vendor's website using the provided weblink. The link has been verified and is currently valid, indicating that the lens is in stock.