SLB-20B-70P 20.0 mm Dia. x 70.6 mm FL; Double-Convex Lens Uncoated

The SLB-20B-70P is a high-quality double-convex lens offered by OptoSigma, a leading vendor in the optical industry. This lens, designed with a spherical geometry, is ideal for a wide range of applications due to its uncoated surface, which allows for versatile use across various wavelengths.

The lens boasts a diameter of 20.0 mm and a center thickness of 3.4 mm, ensuring durability and robustness in its construction. The edge thickness is a mere 2.0 mm, contributing to its sleek design and minimizing unnecessary weight. The effective focal length (EFL) of this lens is 70.6 mm, making it suitable for applications requiring a longer focal length.

The first radius of curvature (R1) is 72.66 mm, while the second radius of curvature (R2) is -72.66 mm, indicating the double-convex nature of the lens. The back focal length (BFL) is 69.4 mm, which is crucial for determining the positioning of the lens in an optical system.

The lens is made of n-BK7 Schott, a popular optical glass due to its excellent optical properties and relatively low cost. This material is known for its low dispersion and high Abbe number, making it an ideal choice for various optical applications.

The SLB-20B-70P is currently in stock and available for immediate purchase through the provided weblink. With its robust construction, versatile uncoated surface, and high-quality materials, this lens is an excellent choice for those seeking a reliable and efficient optical component.