LB1378-C N-BK7 Bi-Convex Lens; Dia:0.5 in; f=40.0 mm ARC 1050-1700nm

The LB1378-C is a high-quality bi-convex lens, designed and manufactured by the renowned optical components supplier, Thorlabs. This lens, with a diameter of 0.5 inches, is fabricated from N-BK7, a popular glass type known for its excellent optical properties, making it an ideal choice for a wide range of applications.

The lens features a focal length of 40.0 mm, which is the distance from the center of the lens to the point where light rays converge or diverge. This focal length, combined with the lens's diameter, provides a high numerical aperture (NA), enhancing the lens's light-gathering capability and depth of field.

The LB1378-C is coated with Thorlabs' proprietary anti-reflection coating, designed to operate within the 1050-1700nm wavelength range. This coating significantly reduces surface reflections, improving transmission and enhancing the overall performance of the lens.

The lens's geometry includes an edge thickness of 1.8 mm and a center thickness of 4.7 mm, providing robustness and structural integrity. The lens's inner and outer radii are 0, indicating a spherical shape, which is common in optical lenses due to its ease of manufacturing and excellent optical performance.