LA1238-A N-BK7 Plano-Convex Lens; Dia:75.0 mm; f=100.0 mm ARC 350-700nm

The LA1238-A is a high-quality Plano-Convex lens from Thorlabs, designed for use in a wide range of optical applications. This lens is made from N-BK7, a popular glass type known for its excellent optical properties, and is sourced from the reputable Schott glass manufacturer.

The lens has a diameter of 75.0 mm and a focal length of 100.0 mm, making it a versatile choice for many setups. The edge thickness is 3 mm, while the center thickness is 19.2 mm, providing a robust and durable structure. The effective focal length (EFL) is also 100.0 mm, and the radius of curvature (R1) is 51.5 mm. The back focal length (BFL) is 87 mm, and the lens has no inner or outer radius, indicating a flat surface on the non-curved side.

The LA1238-A is coated with THo A Bbar on both the front and back surfaces. This anti-reflection coating is designed to operate within the 350-700 nm wavelength range, reducing surface reflections and improving transmission.

This lens is spherical in shape, meaning it has a curved surface that is symmetrically rounded. This shape is common in optical systems due to its ease of manufacture and the ability to focus light to a point.