SLB-30B-70P 30.0 mm Dia. x 70.9 mm FL; Double-Convex Lens Uncoated

The SLB-30B-70P is a high-quality double-convex lens offered by OptoSigma, a renowned vendor in the optical industry. This lens, with a base shape of a circle, is designed for use in a wide range of optical applications.

The lens has a diameter of 30.0 mm and a center thickness of 5.1 mm, ensuring a robust structure while maintaining a sleek profile. The edge thickness is 2.0 mm, providing additional durability. The effective focal length (EFL) of this lens is 70.9 mm, making it suitable for applications requiring a longer focal length.

The SLB-30B-70P 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 first and second radii of curvature are 72.66 mm and -72.66 mm, respectively, indicating a symmetrical, double-convex design. The back focal length (BFL) is 69.1 mm, which is crucial for determining the lens's placement in an optical system.

This lens is uncoated, meaning it does not have any anti-reflective or other surface coatings. While coatings can enhance performance in specific applications, an uncoated lens can be advantageous in situations where cost, simplicity, or specific optical characteristics are priorities.