SLB-50.8-70N 50.8 mm Dia. x -70.0 mm FL; Plano-Concave Lens Uncoated

The SLB-50.8-70N is a Plano-Concave Lens with a diameter of 50.8 mm and a focal length of -70.0 mm. This lens is sourced from OptoSigma, a renowned vendor known for its high-quality optical elements. The lens is made of n-BK7 Schott, a popular material in the optical industry due to its excellent optical properties.

The lens's geometry is characterized by its concave shape, with an edge thickness of 13.4 mm and a center thickness of 3 mm. The inner and outer radii are both 0 mm, indicating a uniform curvature throughout the lens. The back focal length (BFL) is -72 mm, slightly longer than the effective focal length (EFL) of -70 mm, a common characteristic in Plano-Concave lenses.

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 applications without the risk of coating interference.

The lens is designed to work with a wavelength of 546.1 nm, a common choice in many optical systems. It is a Spherical Lens, which is known for its ability to focus light to a single point, making it ideal for various applications such as imaging, beam shaping, and light collimation.