LC4210-B 12.7 mm Dia. UVFS Plano-Concave Lens; EFL=-25mm 650-1050nm

The LC4210-B is a plano-concave lens with a diameter of 12.7 mm, sourced from the renowned optical components manufacturer, Thorlabs. This lens is designed for use within the wavelength range of 650-1050nm, making it suitable for a wide array of optical applications.

The lens features a concave surface with a radius of curvature (R1) of -11.5 mm, and a flat surface, also known as the plano surface. The effective focal length (EFL) of this lens is -25 mm, which is a common characteristic of plano-concave lenses. The negative EFL indicates that the lens diverges light, making it ideal for use in applications where beam expansion is required.

The lens is fabricated from UVFS material, which is a type of optical glass. The lens is coated with a broadband anti-reflection coating, denoted as THo BBAR, on both the front and back surfaces. This coating reduces reflection losses, thereby enhancing the transmission of light through the lens.

The lens has a center thickness of 3 mm, and it does not have any inner or outer radii, indicating that it is a simple plano-concave lens. The lens is part of the THorlabs' extensive catalog, and it is currently in stock, as indicated by its weblink status.