SLSQ-20-90N 20.0 mm Dia. x -90.0 mm FL; Plano-Concave Lens Uncoated

The SLSQ-20-90N is a Plano-Concave Spherical Lens, uncoated, with a diameter of 20.0 mm and a focal length of -90.0 mm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry. The lens is made of fused silica, a material with a high damage threshold and excellent transmission properties, making it suitable for a wide range of applications.

The lens geometry includes a thickness edge of 3.2 mm and a thickness center of 2 mm. The inner radius is 0 mm, and the outer radius is also 0 mm, indicating a flat surface on one side and a concave surface on the other. The radius of curvature (R1) is -41.4 mm, and the back focal length (BFL) is -91.4 mm. The effective focal length (EFL) is -90 mm.

The lens is designed to operate at a wavelength of 546.1 nm. It is uncoated, which means it does not have any anti-reflective or other coatings. This may result in higher reflective losses and a reduced transmission compared to coated lenses, but it also means that the lens is less susceptible to damage from environmental factors or cleaning procedures.

The lens is in stock and available for immediate purchase. For more information, including pricing and delivery times, please refer to the vendor's website using the provided weblink.