LA1270-A N-BK7 Plano-Convex Lens; Dia:18.0 mm; f=25.0 mm ARC 350-700nm

The LA1270-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 manufactured by Schott, a leading glass manufacturer.

The lens has a diameter of 18.0 mm and a focal length of 25.0 mm, making it a versatile choice for many setups. The edge thickness is 1.8 mm, while the center thickness is 5.5 mm, providing a robust and durable structure. The effective focal length (EFL) is also 25.0 mm, and the radius of curvature (ROC) of the curved surface is 12.9 mm. The back focal length (BFL) is 21.3 mm.

The LA1270-A is coated with a broadband anti-reflection coating, designed to reduce surface reflections and increase transmission in the 350-700 nm range. This coating is applied to both the front and back surfaces of the lens.

The lens is spherical in shape, meaning it has a constant curvature across the surface. This shape is ideal for many applications, as it provides a simple and efficient way to focus or collimate light.