SLB-20-25NIR2 20.0 mm Dia. x -25.0 mm FL; Coated; Plano-Concave Lens 750-1550nm

The SLB-20-25NIR2 is a Plano-Concave Spherical Lens, offered by OptoSigma, with a diameter of 20.0 mm and a focal length of -25.0 mm. This lens is designed for use within the wavelength range of 750-1550nm, making it suitable for near-infrared applications.

The lens is made from n-BK7 Schott, a popular optical glass due to its excellent optical properties and relatively low cost. The lens has a thickness of 6.7mm at the edge and 2mm at the center, providing a robust structure while minimizing unnecessary weight.

The lens features a front and back coating of Opt IR2, which is specifically designed for the 750-1550nm wavelength range. This coating enhances the lens's performance by reducing surface reflections and increasing transmission, thereby improving overall system efficiency.

The geometry of the lens includes an inner radius of 0mm and an outer radius of 0mm, indicating a simple, straightforward design. The lens's shape is spherical, a common choice for its ease of manufacturing and versatile applications.

The lens is currently in stock and available for immediate purchase through the provided weblink. With its high-quality materials, advanced coating, and precise specifications, the SLB-20-25NIR2 is an excellent choice for a wide range of near-infrared optical systems.