SLB-15B-20N 15.0 mm Dia. x -19.7 mm FL; Double-Concave Lens Uncoated

The SLB-15B-20N is a high-quality double-concave lens offered by OptoSigma, a leading vendor in the optical industry. This lens, designed with a spherical shape, is crafted from n-BK7 Schott, a renowned optical glass known for its excellent transparency and homogeneity.

The lens boasts a diameter of 15.0 mm and a center thickness of 2.0 mm, providing a robust structure for various applications. The edge thickness is 4.8 mm, ensuring durability and resistance to edge chipping. The lens features a back focal length of -20.3 mm and an effective focal length of -19.7 mm, making it suitable for concave-concave lens configurations.

The double-concave design, with radii of curvature R1 (-20.7 mm) and R2 (20.7 mm), allows for precise control over light paths, making this lens ideal for focusing or diverging light beams in optical systems. The lens is uncoated, offering users the flexibility to apply their preferred coating based on their specific application requirements.

The SLB-15B-20N is currently in stock and available for immediate purchase through the provided weblink. This lens is a versatile and reliable choice for those seeking a high-performance double-concave lens for their optical projects.