LB01-25-200 25.4 mm Dia. N-BK7 Double-Convex Lens; EFL=200mm Uncoated

The LB01-25-200 is a high-quality double-convex lens offered by CeNing Optics, a renowned vendor in the optical industry. This lens, with a diameter of 25.4 mm, is designed for use in a wide range of optical applications.

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

The lens features a double-convex geometry, meaning it has two spherical surfaces that curve outwards. This design is often used to focus light, making it suitable for applications that require light concentration or magnification. The first radius of curvature (R1) is 207, while the second radius (R2) is -207, indicating a symmetrical design.

The effective focal length (EFL) of this lens is 200mm, a length that determines the lens's focusing power. A longer focal length like this one is often used in applications that require a narrower field of view or higher magnification.

The lens has a center thickness of 2.78mm and an edge thickness of 2mm. The thickness variation from the center to the edge is designed to minimize spherical aberration, ensuring optimal image quality.

Notably, this lens is uncoated. While coatings can enhance the performance of lenses by reducing reflection and increasing transmission, an uncoated lens can be advantageous in certain applications where specific reflectance properties are required.