SLB-80B-250P 80.0 mm Dia. x 251.5 mm FL; Double-Convex Lens Uncoated

The SLB-80B-250P 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 80.0 mm and a center thickness of 9.2 mm, ensuring a substantial optical path while maintaining a manageable form factor. The edge thickness is 3.0 mm, providing structural rigidity and resistance to deformation. The effective focal length (EFL) of this lens is 251.5 mm, making it suitable for applications that require moderate magnification and a large field of view.

The lens is made from n-BK7 glass, a popular material in the optical industry due to its excellent optical properties and versatility. The radii of curvature for the first and second surfaces are 259.5 mm and -259.5 mm, respectively, indicating a strongly converging lens that can gather light efficiently. The back focal length (BFL) is 248.5 mm, which should be considered when designing the optical system to ensure adequate clearance for the detector or subsequent optical elements.

This particular lens is uncoated, which may be desirable for applications where broadband transmission is required or when specific coatings are not available. However, it is essential to note that uncoated lenses may exhibit reduced transmission and increased susceptibility to surface contamination compared to their coated counterparts.