SLB-20B-60P 20.0 mm Dia. x 60.6 mm FL; Double-Convex Lens Uncoated

The SLB-20B-60P is a high-quality double-convex lens, sourced from the reputable optical component manufacturer, OptoSigma. This lens, with a base shape of a circle, is designed for use in a wide range of optical systems, thanks to its versatile specifications.

The lens has a diameter of 20.0 mm, making it suitable for applications where a compact yet powerful lens is required. The center thickness of the lens is 3.6 mm, while the edge thickness is 2 mm, providing a robust structure that can withstand typical handling and usage.

The SLB-20B-60P has an effective focal length (EFL) of 60.6 mm, which is a common choice for many optical applications. The first radius of curvature (R1) is 62.28 mm, and the second radius (R2) is -62.28 mm, indicating its double-convex nature. The back focal length (BFL) is 59.4 mm, which is crucial for determining the lens's position in an optical system.

This lens is made from n-BK7 Schott, a popular optical glass due to its excellent optical properties and versatility. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties. However, it can be used in applications where such coatings are not necessary or can be added later.

The lens is designed to work with a wavelength of 546.1 nm, which is in the visible light spectrum. It is spherical in shape, a common choice for many optical applications due to its ease of manufacturing and use.