SLSQK-50-70N 50.0 mm Dia. x -70.0 mm FL; Plano-Concave Lens Uncoated

The SLSQK-50-70N is a Plano-Concave Lens with a diameter of 50.0 mm and a focal length of -70.0 mm, making it a negatively powered lens. This lens is sourced from OptoSigma, a renowned vendor in the optical industry, and is uncoated. The lens is made of fused silica, a material known for its excellent optical properties, including high transparency and resistance to thermal shock.

The lens geometry includes a thickness edge of 14.9 mm and a thickness center of 3 mm, providing a robust structure. The inner and outer radii are both 0 mm, indicating a planar surface on one side and a concave surface on the other. The curvature of the concave surface is represented by a radius of -32.2 mm. The back focal length (BFL) is -72.1 mm, slightly longer than the focal length due to the lens's concave shape.

This lens is designed to work with a wavelength of 546.1 nm, a common reference wavelength in optical systems. It is a spherical lens, meaning it has a constant curvature across its surface. The lack of coating on this lens allows for greater customization, as users can apply their own coatings to suit their specific application needs.