SLB-25.4B-60N 25.4 mm Dia. x -59.7 mm FL; Double-Concave Lens Uncoated

The SLB-25.4B-60N is a high-quality double-concave lens, sourced from the reputable optical vendor, OptoSigma. This lens, with a base shape of a circle, is designed for use in a wide range of optical applications, thanks to its precise geometry and material composition.

The lens has a diameter of 25.4 mm, making it suitable for use in compact optical systems. The edge thickness is 4.6 mm, while the center thickness is 2 mm, providing a robust structure that can withstand typical handling and usage. The effective focal length (EFL) of this lens is -59.7 mm, indicating its double-concave nature, which is further confirmed by its radii of curvature, r1 and r2, at -62.28 mm and 62.28 mm respectively. The back focal length (BFL) is -60.4 mm.

The lens is made from n-bk7 schott, a popular optical material known for its excellent optical properties. This material is particularly suitable for applications in the visible spectrum, as demonstrated by the wavelength of 546.1 nm specified for this lens. The lens is uncoated, offering users the flexibility to apply their preferred coating based on their specific application requirements.