SLB-30B-120P 30.0 mm Dia. x 120.6 mm FL; Double-Convex Lens Uncoated

The SLB-30B-120P 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 3.8 mm, ensuring a robust and durable construction. The edge thickness is 2.0 mm, providing additional structural integrity. The effective focal length (EFL) of this lens is 120.6 mm, making it suitable for applications that require a longer focal length.

The SLB-30B-120P is made from n-BK7 Schott, a popular optical glass due to its excellent optical properties and chemical durability. The radii of curvature for this lens are r1 = 124.56 mm and r2 = -124.56 mm, indicating a symmetrical, double-convex design. The back focal length (BFL) is 119.4 mm.

This lens is uncoated, which means it does not have any anti-reflective coatings. While this may result in a higher reflectance at the air-glass interfaces, it also means the lens is more cost-effective and versatile, as it can be used with a wide range of wavelengths without the risk of coating damage.

The lens is designed for use at a wavelength of 546.1 nm, making it suitable for applications that use sodium light, such as interferometry and holography. However, due to its high-quality Schott glass and symmetrical design, it can be used across a broad spectrum of wavelengths.