LB1844 N-BK7 Bi-Convex Lens; Dia:0.5 in; f=50.0 mm Uncoated

The LB1844 N-BK7 Bi-Convex Lens is a high-quality optical component sourced from Thorlabs. This lens, with a diameter of 0.5 inches and a focal length of 50.0 mm, is designed for use in a wide range of optical systems.

The lens is made from N-BK7, a popular glass type in the optical industry due to its excellent optical properties. This material, also known as BK7, is a borosilicate crown glass with a low refractive index and low dispersion, making it an ideal choice for various applications.

The lens geometry is spherical, with both surfaces curved outwards, hence the term "bi-convex". The first surface has a radius of curvature of 51.1 mm, while the second surface has a radius of -51.1 mm. This specific curvature design allows for efficient light transmission and focusing.

The lens has an effective focal length (EFL) of 50.0 mm, which is the distance from the lens to the point where light rays converge or diverge. The back focal length (BFL) is 49.1 mm, which is the distance from the rear surface of the lens to the point where the light rays converge or diverge.

The lens has a central thickness of 2.6 mm and an edge thickness of 1.8 mm. This thickness distribution ensures the lens's structural integrity while minimizing optical aberrations.

Please note that this lens is uncoated. While uncoated lenses can be more cost-effective, they may be more susceptible to surface reflections and could benefit from anti-reflective coatings for improved performance in certain applications.

For more information, including pricing and availability, please refer to the vendor's website using the provided weblink.