LA1727-B N-BK7 Plano-Convex Lens; Dia:2 in; f=750.0 mm ARC 650-1050nm

The LA1727-B is a high-quality plano-convex lens from Thorlabs, designed for use in a wide range of optical applications. This lens is fabricated from N-BK7, a popular glass type known for its excellent optical properties, and features a diameter of 2 inches (50.8 mm) and a focal length of 750.0 mm.

The plano-convex design of this lens, where one side is flat and the other is curved, allows for efficient light collection and focusing. The lens has a thickness of 3 mm at the edge and 3.8 mm at the center, providing a robust and durable structure. The effective focal length (EFL) of 750.0 mm indicates the lens's ability to focus light to a point, making it suitable for imaging and beam shaping applications.

The lens's curvature is defined by a radius of 386.3 mm, and its back focal length (BFL) is 745 mm. The BFL is the distance from the lens's rear surface to the focused light beam, which is crucial for designing optical systems. The lens's inner and outer radii are both 0, indicating a uniform curvature across the lens.

The LA1727-B lens is coated with Thorlabs' BBAR coating, which has a broadband anti-reflection (AR) range of 650-1050 nm. This coating reduces unwanted reflections, improving light transmission and enhancing the lens's performance in various applications.