LE1104-C 25.4 mm Dia. N-BK7 Positive Meniscus Lens; EFL=150mm 1050-1700nm

The LE1104-C is a 25.4 mm diameter Spherical Lens with a Positive Meniscus shape, sourced from the reputable optical components manufacturer, Thorlabs. This lens is specifically designed for use within the wavelength range of 1050-1700nm, making it suitable for a variety of applications within the near-infrared spectrum.

The lens features an effective focal length (EFL) of 150mm, which is a critical specification when considering the lens's suitability for specific optical systems. The EFL determines the distance between the lens and the focal point, where the light rays converge. This information is crucial in the design and configuration of optical systems.

The LE1104-C is made from N-BK7, a high-quality borosilicate glass commonly used in optical systems due to its excellent optical properties. The lens's geometry includes an outer diameter of 25.4mm, an edge thickness of 2mm, and a center thickness of 3.1mm. The front and back surfaces of the lens are coated with a broadband anti-reflection coating, denoted as 'tho c bbar', which enhances transmission and reduces surface reflections.

The lens's base shape is circular, and its geometry is spherical, with radii of curvature R1 and R2 being 49.1mm and 131.6mm, respectively. The back focal length (BFL) is 146.3mm, and the inner and outer radii are both 0mm.