SLSQ-20-30N 20.0 mm Dia. x -30.0 mm FL; Plano-Concave Lens Uncoated

The SLSQ-20-30N is a Plano-Concave Lens with a diameter of 20.0 mm and a focal length of -30.0 mm, making it a negatively powered lens. This lens is sourced from OptoSigma, a renowned vendor in the optical industry. The lens is made of fused silica, a material known for its excellent optical properties, including high transparency and resistance to thermal shock.

The lens geometry is characterized by its edge thickness of 6.3 mm and center thickness of 2 mm. The inner and outer radii are 0 mm, indicating a flat surface on one side and a concave surface on the other. The back focal length (BFL) is -31.4 mm, and the effective focal length (EFL) is -30 mm. The radius of curvature (R1) is -13.8 mm.

This lens is uncoated, meaning it does not have any additional layers to enhance its optical properties. However, uncoated lenses can still provide high-quality performance, especially in applications where the light path does not involve multiple reflections or high-power light sources.

The lens is designed to work with a wavelength of 546.1 nm. It is important to note that the performance of the lens can vary depending on the wavelength of the light it is intended to focus. Therefore, it is crucial to ensure that the lens's specifications match the requirements of your specific application.