KBC073 50.8 mm Dia. x -250 mm FL; Uncoated; Double-Concave Lens

The KBC073 is a high-quality spherical lens, specifically designed for use in optical systems that require a concave-concave lens shape. This lens, sourced from the reputable vendor MKS/Newport, boasts a diameter of 50.8 mm and a focal length of -250 mm, making it suitable for a wide range of applications.

The lens is made from N-BK7 Schott, a popular optical glass due to its excellent optical properties and high Abbe number, which minimizes chromatic aberration. The base shape of the lens is circular, and it features a double-concave geometry, with radii of curvature of -258.824 mm and 258.824 mm, respectively. This geometry results in a back focal length of -250.82 mm.

The lens is uncoated, providing a cost-effective solution where anti-reflective coatings are not required. However, users should be aware that uncoated lenses can suffer from increased reflection, which may affect the overall performance of the optical system.

The lens has a thickness of 4.52 mm at the edge and 2.5 mm at the center, providing a robust and durable design. The inner and outer radii are both 0, indicating a simple spherical shape.

This lens is designed to work with a wavelength of 589 nm, making it suitable for a wide range of applications in the visible light spectrum. The provided web link leads to the vendor's page, where users can find more information about the lens and its specifications.