SLSQ-25.4-200N 25.4 mm Dia. x -200.0 mm FL; Plano-Concave Lens Uncoated

OptoSigma's SLSQ-25.4-200N is a plano-concave lens with a diameter of 25.4 mm and a focal length of -200 mm, designed for use in a wide range of optical applications. This lens is made from fused silica, a material known for its excellent optical properties, including high transparency and resistance to thermal shock.

The lens geometry features a thickness of 2.9 mm at the edge and 2 mm at the center, 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 of -92 mm, contributing to its negative focal length. The back focal length of the lens is -201.4 mm, slightly longer than its effective focal length due to its concave design.

This lens is uncoated, meaning it does not have any anti-reflective coatings applied to its surfaces. While this may result in higher reflective losses, it also means the lens is less susceptible to damage from environmental factors and handling. The lens is designed to operate at a wavelength of 546.1 nm, making it suitable for use in applications such as microscopy, interferometry, and beam shaping.