SLSQ-20-100N 20.0 mm Dia. x -100.0 mm FL; Plano-Concave Lens Uncoated

OptoSigma's SLSQ-20-100N is a fused silica plano-concave lens, uncoated and designed for general use. This lens boasts a diameter of 20.0 mm and a focal length of -100.0 mm, making it suitable for a wide range of optical applications.

The lens's geometry is characterized by a thickness edge of 3.1 mm and a thickness center of 2.0 mm, with an inner radius of 0 mm and an outer radius of 0 mm. The concave surface of the lens has a radius of curvature (R1) of -46 mm, contributing to its negative focal length. The back focal length (BFL) is -101.4 mm, slightly longer than the specified focal length due to the lens's thickness.

The lens is made of fused silica, a material with a high Abbe number, making it an excellent choice for achromatic applications. The material is identified as "fused sil mal-1965" in the item data, indicating its specific type and properties.

The lens is uncoated, meaning it does not have any anti-reflective or other surface coatings. This may result in higher reflective losses and a lower transmission rate, but it also means the lens is less susceptible to damage from environmental factors or handling.

The item data indicates that this lens is in stock and available for purchase, with a direct weblink provided for user convenience.