SLB-25.4B-35P 25.4 mm Dia. x 36.1 mm FL; Double-Convex Lens Uncoated

The SLB-25.4B-35P is a high-quality double-convex lens, sourced from the reputable optical vendor, OptoSigma. This lens, with a base shape of a circle, is designed for use in a wide range of optical applications, thanks to its precise geometry and material composition.

The lens has a diameter of 25.4 mm, making it suitable for use in systems with similar aperture sizes. The edge thickness is 1.8 mm, while the center thickness is 6.4 mm, providing a robust structure that can withstand typical handling and usage. The effective focal length (EFL) of the lens is 36.1 mm, a critical parameter for determining the lens's focusing power and its suitability for specific applications.

The lens's first radius of curvature (R1) is 36.33 mm, and the second radius (R2) is -36.33 mm, indicating its double-convex shape. The back focal length (BFL) is 33.9 mm, which is the distance from the lens's rear surface to its focal point. The lens is made from n-BK7 Schott, a popular optical material known for its excellent optical properties and versatility.

The lens is uncoated, which means it does not have any anti-reflective or other surface coatings. While this may result in higher reflective losses, it also means the lens can be used in a wider range of wavelengths, making it a versatile choice for many applications.