SLB-50B-220P 50.0 mm Dia. x 220.9 mm FL; Double-Convex Lens Uncoated

The SLB-50B-220P 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 50.0 mm, making it suitable for use in systems with similar aperture sizes. The edge thickness is 3.0 mm, while the center thickness is 5.7 mm, providing a robust structure that can withstand typical handling and usage. The effective focal length (EFL) of this lens is 220.9 mm, which is a crucial factor in determining the lens's magnification and field of view.

The lens is made from n-BK7 Schott, a popular optical glass due to its excellent optical properties and versatility. The curvature of the lens is defined by its first and second radii of curvature, which are 228.36 mm and -228.36 mm respectively. These radii contribute to the lens's double-convex shape, which is ideal for applications requiring a high level of light concentration.

The back focal length (BFL) of the lens is 219.1 mm, a critical measurement for determining the lens's position in an optical system. The lens has no inner or outer radius, indicating it is a simple lens without any additional features.

This lens is designed for use with a wavelength of 546.1 nm, a common reference wavelength in optical systems. It does not come with any coating, which may be a consideration depending on the specific application and environmental conditions.