SLB-15-25N 15.0 mm Dia. x -25.0 mm FL; Plano-Concave Lens Uncoated

The SLB-15-25N is a plano-concave lens with a diameter of 15.0 mm and a focal length of -25.0 mm, making it a negatively powered lens. This lens is sourced from OptoSigma, a renowned vendor in the optical industry, and is uncoated. The lens is made of n-BK7 Schott, a popular optical glass due to its excellent optical properties and high transmittance in the visible spectrum.

The lens's geometry includes an edge thickness of 4.4 mm and a center thickness of 2 mm. The inner and outer radii are both 0 mm, indicating a planar surface on one side and a concave surface on the other. The back focal length (BFL) is -26.3 mm, which is slightly longer than the specified focal length due to the lens's thickness.

This lens is designed for use in monochromatic applications at a wavelength of 546.1 nm. Its spherical shape ensures excellent image quality, making it suitable for various optical systems. However, it's important to note that the lens is uncoated, which may affect its performance in high-intensity light applications or where scratch resistance is a concern.