LC1254-B N-BK7 Plano-Concave Lens; Dia:25 mm; f=-100.0 mm ARC 650-1050nm

The LC1254-B is a plano-concave lens with a diameter of 25 mm and a focal length of -100.0 mm, making it a negatively powered lens. This lens is fabricated from N-BK7, a popular glass type from Schott, known for its excellent optical properties. The lens's concave shape, characterized by a radius of curvature (R1) of -51.5 mm, contributes to its dispersive properties.

The lens's design includes an antireflection coating (ARC) optimized for the wavelength range of 650-1050 nm, which enhances its transmission capabilities within this spectrum. Both the front and back surfaces of the lens are coated with this coating, denoted as 'tho b bbar'. This coating reduces surface reflections, thereby increasing the lens's efficiency and improving the overall system performance.

The lens's geometry includes a thickness of 5.5 mm at the edge and 4 mm at the center. The inner and outer radii are both zero, indicating a simple, circular geometry. The lens's effective focal length (EFL) is -100 mm, a value that is negative due to the concave shape of the lens.

This lens is available from Thorlabs, a reputable vendor known for its high-quality optical components. According to the vendor's website, the lens is currently in stock, indicating its availability for immediate purchase and use.