SLB-20-50N 20.0 mm Dia. x -50.0 mm FL; Plano-Concave Lens Uncoated

The SLB-20-50N is a Plano-Concave Lens with a 20.0 mm diameter and a focal length of -50.0 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.

The lens's geometry is characterized by a 4 mm thickness at the edge and a 2 mm thickness at the center. The inner and outer radii are both 0 mm, indicating a flat surface on one side and a concave surface on the other. The lens's back focal length is -51.3 mm, slightly longer than its focal length due to the curvature of the concave surface.

This lens is uncoated, meaning it does not have any additional layers to enhance its optical properties. While this may result in a lower transmission rate and a higher susceptibility to environmental factors, it also means the lens can be easily integrated into various optical systems without the need for additional coating compatibility considerations.

The lens is designed to operate at a wavelength of 546.1 nm, making it suitable for applications that use visible light, such as microscopy, beam shaping, and laser systems. Its spherical shape ensures a wide field of view and low spherical aberration, making it an excellent choice for imaging applications.