SLSQ-15-60N 15.0 mm Dia. x -60.0 mm FL; Plano-Concave Lens Uncoated

The SLSQ-15-60N is a Plano-Concave Lens with a diameter of 15.0 mm and a focal length of -60.0 mm, making it a negatively powered lens. This lens is sourced from OptoSigma, a renowned vendor in the optical industry, and is made of fused silica material, specifically identified as "fused sil mal-1965".

The lens's geometry is characterized by its spherical shape, with a center thickness of 2.0 mm and an edge thickness of 3.0 mm. The inner and outer radii are both 0.0 mm, indicating a uniform curvature. The back focal length (BFL) is -61.4 mm, slightly longer than the effective focal length (EFL), which is -60.0 mm.

This lens is uncoated, meaning it does not have any anti-reflective or other surface treatments. While this may result in higher reflective losses, it also means the lens can be used in a wider range of wavelengths, as coatings can sometimes introduce wavelength-dependent effects.

The lens is designed to be used at a wavelength of 546.1 nm, which is a common reference wavelength in optical design and metrology. It is important to note that the performance of the lens can vary depending on the specific application and the surrounding optical elements.