LA7542-E2 25.4 mm Dia. ZnSe Plano-Convex Lens; EFL=25.4mm 4.5-7.5µm

The LA7542-E2 is a 25.4 mm diameter ZnSe plano-convex lens, designed for use in the infrared spectrum with a wavelength of 10600 nm. This lens is sourced from Thorlabs, a reputable vendor known for its high-quality optical components.

The lens features a plano-convex geometry, meaning one side is flat (plano) and the other side is curved (convex). This design is often used to minimize spherical aberration, a common issue in optical systems. The lens has a 25.4 mm effective focal length (EFL), which is the distance from the lens's center to the focal point where light rays converge.

The lens's thickness varies from 2 mm at the edge to 4.3 mm at the center, providing structural rigidity while maintaining a low profile. The inner and outer radii are 0, indicating a sharp transition between the flat and curved surfaces.

The LA7542-E2 is coated with Thorlabs' E2ZnSeARC4500750 coating on both the front and back surfaces. This anti-reflection coating is designed to reduce surface reflections and increase transmission in the 4.5-7.5 µm range, enhancing the lens's performance in the infrared spectrum.