SLB-25B-200P 25.0 mm Dia. x 200.5 mm FL; Double-Convex Lens Uncoated

The SLB-25B-200P is a high-quality double-convex lens, sourced from OptoSigma, a renowned vendor in the optical industry. 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 25.0 mm, making it suitable for use in compact optical systems. The edge thickness is 2.0 mm, while the center thickness is 2.8 mm, providing excellent structural integrity and resistance to deformation. The effective focal length (EFL) of this lens is 200.5 mm, a characteristic that significantly influences the convergence or divergence of light rays passing through it.

The lens's first radius of curvature (R1) is 207.6 mm, and the second radius (R2) is -207.6 mm, indicating its double-convex shape. The back focal length (BFL) is 199.5 mm, which is the distance between the lens's rear surface and the image plane in a typical optical system. The lens is made of n-BK7 Schott, a popular optical material known for its excellent optical properties.

The wavelength of this lens is 546.1 nm, which falls within the visible light spectrum. It is uncoated, meaning it does not have any anti-reflective or other surface coatings. This may result in higher reflective losses but can be advantageous in certain applications where specific surface properties are required.