SLB-25-120N 25.0 mm Dia. x -120.0 mm FL; Plano-Concave Lens Uncoated

The SLB-25-120N is a Plano-Concave Lens with a diameter of 25.0 mm and a focal length of -120.0 mm. This lens is sourced from OptoSigma, a renowned vendor known for their 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 geometry is characterized by its spherical shape, with a center thickness of 2.0 mm and an edge thickness of 3.3 mm. The inner and outer radii are both 0.0 mm, indicating a flat surface on one side and a concave surface on the other. The back focal length (BFL) is -121.3 mm, slightly longer than the specified focal length, which is typical for Plano-Concave lenses.

This lens is uncoated, meaning it does not have any anti-reflective or other coatings applied to its surfaces. While this may result in higher reflective losses, it also means the lens is more versatile and can be used in a wider range of applications without the risk of coating interference.

The lens is designed for use at a wavelength of 546.1 nm, making it suitable for applications in the visible light spectrum. It is a Spherical Lens, which is a type of lens that has at least one spherical surface. This type of lens is widely used in various optical systems due to its simple manufacturing process and good optical performance.