SLB-20B-25P 20.0 mm Dia. x 26.0 mm FL; Double-Convex Lens Uncoated

The SLB-20B-25P is a high-quality double-convex lens offered by 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.

The lens has a diameter of 20.0 mm and a center thickness of 6.0 mm, ensuring a robust and durable construction. The edge thickness is 2.0 mm, providing a balance between strength and weight. The effective focal length (EFL) of this lens is 26.0 mm, making it suitable for applications that require a longer focal length.

The SLB-20B-25P is made from n-BK7 Schott, a popular optical glass due to its excellent optical properties and high Abbe number. This lens is uncoated, offering users the flexibility to apply their preferred coating based on their specific application requirements.

The curvature of the lens is defined by two radii: R1 is 25.95 mm, and R2 is -25.95 mm. The back focal length (BFL) is 24.0 mm, which is crucial for determining the lens's position in an optical system. The lens's inner and outer radii are both 0 mm, indicating a uniform curvature across the lens.

This lens is designed to work with a wavelength of 546.1 nm, a common wavelength used in many optical systems. The lens's shape is spherical, which is a common choice for many optical applications due to its ease of manufacturing and good optical performance.