SLB-20B-80P 20.0 mm Dia. x 80.5 mm FL; Double-Convex Lens Uncoated

The SLB-20B-80P is a high-quality double-convex lens, sourced from the renowned optical component manufacturer, 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 20.0 mm and a center thickness of 3.2 mm, ensuring a substantial optical path while maintaining a compact form factor. The edge thickness is 2 mm, providing robustness and durability. The effective focal length (EFL) of this lens is 80.5 mm, making it suitable for applications that require moderate magnification or a long focal length.

The lens is made of n-BK7, a high-grade borosilicate glass known for its excellent optical properties, including a low refractive index and low dispersion. This makes the lens ideal for applications that require high image quality and color correction, such as imaging systems, beam shaping, and laser applications.

The curvature of the lens is defined by its first and second radii of curvature, which are 83.04 mm and -83.04 mm, respectively. This symmetrical design ensures a uniform refractive power across the lens, minimizing optical aberrations and distortions. The back focal length (BFL) of the lens is 79.5 mm, which is crucial for determining the lens's position in an optical system.

The lens is uncoated, offering users the flexibility to apply their preferred coating based on their specific application requirements. However, it's essential to note that the lens, in its current state, may have higher reflectivity and is more susceptible to environmental damage compared to coated versions.