KBC028 12.7 mm Dia. x -12.5 mm FL; Uncoated; Double-Concave Lens

The KBC028 is a high-quality spherical lens, specifically designed with a concave-concave shape, sourced from the reputable vendor MKS/Newport. This lens boasts a diameter of 12.7 mm and a focal length of -12.5 mm, making it ideal for a wide range of optical applications.

The lens is crafted from the renowned material N-BK7 Schott, a borosilicate crown glass known for its excellent optical properties, including low dispersion and high homogeneity. This material is particularly suitable for applications in the visible spectrum, with a wavelength of 589 nm.

The KBC028 features a double-concave geometry, with radii of curvature of -13.333 mm for the first surface and 13.333 mm for the second. This design results in a back focal length of -13.29 mm, providing a compact solution for optical systems. The edge thickness measures 5.07 mm, while the center thickness is 2.5 mm, ensuring robustness and durability.

Notably, this lens is uncoated, offering users the flexibility to apply their preferred coating based on their specific application requirements. However, it's essential to consider that uncoated lenses may have higher reflectivity, which could impact the overall performance of the optical system.