The SLB-20-30N is a Plano-Concave Lens with a 20.0 mm diameter and a focal length of -30.0 mm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry. The lens is made of n-BK7 Schott material, a popular choice for its high refractive index and low dispersion, making it ideal for a wide range of optical applications.
The lens geometry features a thickness edge of 5.6 mm and a thickness center of 2 mm. The inner and outer radii are both 0 mm, indicating a flat surface on one side and a concave surface on the other. The radius of curvature (R1) is -15.57 mm, and the back focal length (BFL) is -31.3 mm.
The lens is uncoated, which means it does not have any additional layers to enhance its optical properties. This may be suitable for applications where anti-reflection or other coatings are not required.
The lens is in stock and available for immediate purchase. For more information, you can visit the vendor's website using the provided weblink.