SLSQ-30-70N 30.0 mm Dia. x -70.0 mm FL; Plano-Concave Lens Uncoated

The SLSQ-30-70N is a Plano-Concave Spherical Lens, part of OptoSigma's extensive catalog of optical elements. This lens, with a diameter of 30.0 mm, is designed for use in a wide range of optical applications. The lens's concave shape, characterized by a radius of curvature (r1) of -32.2 mm, contributes to its negative focal length (FL) of -70.0 mm.

The lens's geometry is defined by its edge thickness of 5.7 mm and center thickness of 2.0 mm. The back focal length (BFL) is -71.4 mm, and the lens has no inner or outer radius, indicating a flat surface on both sides.

The lens is made of fused silica, a material known for its excellent optical properties, including high transparency and resistance to thermal shock. The material ID, "fused sil mal-1965", provides further information about the specific type of fused silica used in this lens.

The lens is uncoated, meaning it does not have any additional layers to enhance its optical properties. This may be suitable for applications where the lens will be used in a controlled environment or where specific coating requirements are not needed.

The lens is designed to work with a wavelength of 546.1 nm, making it suitable for applications that use this wavelength, such as certain types of microscopy or spectroscopy.