SLB-20-30NIR1 20.0 mm Dia. x -30.0 mm FL; Coated; Plano-Concave Lens 633-1064nm

The SLB-20-30NIR1 is a Plano-Concave Spherical Lens, sourced from OptoSigma, with a diameter of 20.0 mm and a focal length of -30.0 mm. This lens is designed for use within the wavelength range of 633-1064nm, making it suitable for near-infrared (NIR) applications.

The lens is fabricated from n-BK7 Schott, a popular optical glass due to its excellent optical properties and versatility. The lens features a concave shape on one side, with a radius of curvature of -15.57 mm, and a flat surface on the other side. The center thickness of the lens is 2 mm, while the edge thickness measures 5.6 mm, providing robustness and ensuring minimal optical distortion.

The SLB-20-30NIR1 comes with a front and back coating of opt IR1, which is specifically designed for the 633-1064nm wavelength range. This coating enhances the lens's performance by reducing surface reflections and improving transmission, thereby minimizing light loss and increasing the overall efficiency of the optical system.