SLB-20-50NIR2 20.0 mm Dia. x -50.0 mm FL; Coated; Plano-Concave Lens 750-1550nm

OptoSigma's SLB-20-50NIR2 is a plano-concave lens with a diameter of 20.0 mm and a focal length of -50.0 mm, designed for use in the near-infrared spectrum of 750-1550nm. This lens is made from n-BK7 Schott, a popular optical glass known for its excellent transparency and low auto-fluorescence.

The lens geometry includes an edge thickness of 4.0 mm and a center thickness of 2.0 mm, with an inner radius of 0 mm and an outer radius of 0 mm. The front and back surfaces of the lens are coated with Opt IR2, a broadband anti-reflection coating that enhances transmission and reduces surface reflections.

This lens is part of the Spherical Lens (Plano-Concave) category, featuring a base shape of Circular. The geometry of the lens is spherical, with a radius of curvature (R1) of -25.95 mm and a back focal length (BFL) of -51.3 mm.

The lens is currently in stock and available for immediate purchase through the provided weblink. With its high-quality materials, advanced coatings, and precise geometry, the SLB-20-50NIR2 is an excellent choice for a wide range of optical applications in the near-infrared spectrum.