LA1274-A N-BK7 Plano-Convex Lens; Dia:30.0 mm; f=40.0 mm ARC 350-700nm

The LA1274-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 optical glass due to its excellent optical properties, low auto-fluorescence, and high damage threshold.

The lens has a diameter of 30.0 mm and a focal length of 40.0 mm, making it a versatile choice for many setups. The edge thickness is 2.5 mm, while the center thickness is 9 mm, providing a robust and durable structure. The effective focal length (EFL) is 40.0 mm, and the radius of curvature (R1) is 20.6 mm. The back focal length (BFL) is 34 mm, and the lens has no inner or outer radius, indicating a flat surface on the opposite side of the curvature.

The LA1274-A is coated with Thorlabs' anti-reflection coating, which is designed to operate over a broad spectrum from 350 nm to 700 nm. This coating reduces surface reflections, improving transmission and overall system performance. The lens is designed for use in the visible spectrum, with a central wavelength of 587.6 nm.