SLB-20-120NIR2 20.0 mm Dia. x -120.0 mm FL; Coated; Plano-Concave Lens 750-1550nm

The SLB-20-120NIR2 is a Plano-Concave Spherical Lens, precision crafted by OptoSigma, a renowned vendor in the optical industry. This lens boasts a diameter of 20.0 mm and a focal length of -120.0 mm, making it a versatile component for various optical applications.

The lens is constructed from n-BK7 Schott, a high-quality optical glass known for its excellent transmittance and homogeneity. This material is particularly suitable for use in the infrared spectrum, with a wavelength of 546.1 nm, enhancing its performance in the 750-1550nm range.

The lens features a front and back coating of Opt IR2, a specialized anti-reflective coating designed to reduce surface reflections and improve transmission in the infrared spectrum. This coating ensures optimal performance and durability, making the lens ideal for use in demanding environments.

The geometry of the lens is meticulously designed, with an edge thickness of 2.8 mm and a center thickness of 2 mm. The lens's inner and outer radii are 0 mm, contributing to its Plano-Concave shape. The back focal length is -121.3 mm, and the effective focal length is -120 mm, providing the lens with its unique optical properties.