45-022 20.0mm Dia. x -40 FL; Uncoated; Plano-Concave Lens

The 45-022 is a 20.0mm diameter Plano-Concave lens with a focal length of -40, sourced from the reputable optical vendor, Edmund Optics. This lens is designed for use in various optical systems, offering high-quality performance and precision.

The lens is made from the high-grade material, n-BK7 Schott, which is known for its excellent optical properties, including high homogeneity, low auto-fluorescence, and excellent transmission in the visible spectrum. The uncoated surface ensures minimal reflection, making it suitable for applications where high transmission is required.

The geometry of the lens is characterized by its diameter of 20.0mm, a thickness of 5.69mm at the edge, and 3.5mm at the center. The inner and outer radii are 0mm, indicating a flat surface on one side and a concave surface on the other. The back focal length (BFL) is -42.31mm, and the effective focal length (EFL) is -40mm.

This lens is ideal for use in various applications, including imaging systems, beam shaping, and laser applications. However, due to its concave design, it is not suitable for use as a focusing element in imaging systems.

Please note that the lens is supplied uncoated, and additional coatings can be applied to enhance its performance in specific applications. Always refer to the vendor's specifications and recommendations for the appropriate use and handling of this optical component.