SLB-30-120N 30.0 mm Dia. x -120.0 mm FL; Plano-Concave Lens Uncoated

The SLB-30-120N is a Plano-Concave Lens with a 30.0 mm diameter and a focal length of -120.0 mm, sourced from OptoSigma. This lens is made of n-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties, including low optical dispersion and high homogeneity.

The lens features a concave shape with a center thickness of 2 mm and an edge thickness of 3.8 mm. The inner and outer radii are both 0 mm, indicating a uniform curvature. The back focal length (BFL) is -121.3 mm, slightly longer than the specified focal length, which is typical for lenses of this type.

The lens is uncoated, meaning it does not have any anti-reflective or other surface treatments. This can result in higher reflective losses, but it also means the lens can be used in a wider range of applications without the risk of coating damage.

The lens is designed for use at a wavelength of 546.1 nm, but it can be used with other wavelengths as well, although this may affect its optical performance. It is a spherical lens, which means it has a constant curvature throughout its surface.

This lens is ideal for use in optical systems that require a negative lens element, such as telescopes, microscopes, and other imaging systems. It is also suitable for use in beam shaping and other applications where a concave lens is required.

Please note that the lens is in stock and the web link provided is valid, allowing users to easily access more information or place an order.