LA1951-A N-BK7 Plano-Convex Lens; Dia:1 in; f=25.4 mm ARC 350-700nm

The LA1951-A is a plano-convex lens, part of Thorlabs' extensive catalog of optical elements. This lens boasts a diameter of 1 inch (25.4 mm) and a focal length of 25.4 mm, making it a versatile choice for a variety of applications. The lens is made from N-BK7, a popular glass type known for its excellent optical properties, particularly its high refractive index and low dispersion.

The plano-convex shape of this lens, where one side is flat and the other is curved, allows for efficient light collection and focusing. The lens has an outer radius of 0 mm and an inner radius of 0 mm, indicating a uniform thickness across the flat side. The thickness at the edge is 1.8 mm, while the center thickness is 11.7 mm, providing a solid structure for the lens.

The lens has an effective focal length (EFL) of 25.4 mm, which is the same as its focal length, indicating a unit-magnification system. The radius of curvature (R1) is 13.1 mm, and the back focal length (BFL) is 17.6 mm, providing additional specifications for precise optical design.

The LA1951-A lens is coated with ARC 350-700nm on both the front and back surfaces. This anti-reflection coating reduces unwanted reflections and increases transmission in the 350-700 nm spectral range, making it suitable for use with a wide range of light sources.