KBC040 25.4 mm Dia. x -75 mm FL; Uncoated; Double-Concave Lens

The KBC040 is a high-quality spherical lens, specifically designed for use in optical systems that require concave-concave lenses. This lens, sourced from the reputable vendor MKS/Newport, boasts a diameter of 25.4 mm and a focal length of -75 mm, making it suitable for a wide range of applications.

The lens is made from N-BK7 Schott, a popular material in the optical industry due to its excellent optical properties and high damage threshold. The base shape of the lens is circular, and it features a double-concave geometry, with radii of curvature R1 and R2 at -77.943 mm and 77.943 mm respectively. This geometry results in a back focal length (BFL) of -75.82 mm.

The lens is uncoated, which means it does not have any anti-reflective or other coatings. While this may result in higher reflective losses, it also means that the lens is more cost-effective and versatile, as it can be used in a wider range of wavelengths without the risk of coating damage.

The lens has a thickness of 4.19 mm at the edge and 2.5 mm at the center. The inner and outer radii are both 0, indicating a uniform curvature throughout the lens.

According to the vendor's website, this lens is in stock, ensuring quick delivery times. The website also provides further technical details and specifications, as well as purchasing information.