SLB-10B-40P 10.0 mm Dia. x 40.4 mm FL; Double-Convex Lens Uncoated

The SLB-10B-40P is a high-quality double-convex lens offered by OptoSigma, a leading 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.

The lens has a diameter of 10.0 mm and a center thickness of 2.6 mm, with the edge thickness being 2.0 mm. The effective focal length (EFL) of this lens is 40.4 mm, making it suitable for systems that require a longer focal length. The back focal length (BFL) is 39.6 mm, which is a critical factor in determining the lens's placement in an optical system.

The SLB-10B-40P is made of n-BK7 Schott, a popular optical glass due to its excellent optical properties and high transmittance in the visible spectrum. The lens's surface is uncoated, which means it does not have any anti-reflective coatings. This may result in a higher reflectance at the air-glass interfaces but can be beneficial in certain applications where specific reflectance properties are required.

The curvature of the lens is defined by its radii of curvature, with r1 being 41.52 mm and r2 being -41.52 mm. These values indicate a symmetrical, double-convex lens. The inner and outer radii are both 0, suggesting that this lens does not have any special features such as a thread or a flange.

The lens is designed to work with a wavelength of 546.1 nm, which is in the green part of the visible spectrum. This wavelength is often used in interferometry and other precision optical measurements.