SLB-20-40NIR1 20.0 mm Dia. x -40.0 mm FL; Coated; Plano-Concave Lens 633-1064nm

The SLB-20-40NIR1 is a Plano-Concave Spherical Lens, sourced from OptoSigma, with a diameter of 20.0 mm and a focal length of -40.0 mm. This lens is designed for use within the wavelength range of 633-1064nm, making it suitable for a variety of applications within this spectrum.

The lens is made from n-bk7 schott, a popular material in optical applications due to its excellent optical properties. The geometry of the lens includes an inner radius of 0 and an outer radius of 0, with a thickness at the edge of 4.6 mm and a thickness at the center of 2 mm. The effective focal length (EFL) is -40.0 mm, and the back focal length (BFL) is -41.3 mm. The radius of curvature (R1) is -20.76 mm.

The SLB-20-40NIR1 is coated with opt ir1 on both the front and back surfaces, enhancing its performance within its specified wavelength range. This coating helps to reduce reflection and increase transmission, improving the overall efficiency of the lens.

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