SLB-15B-30NM 15.0 mm Dia. x -29.7 mm FL; Coated; Double-Concave Lens 400-700nm

The SLB-15B-30NM is a high-quality double-concave lens, designed and manufactured by OptoSigma. This lens, with a base shape of a circle, is specifically engineered for use within the wavelength range of 400-700nm, making it suitable for a wide range of optical applications.

The lens has a diameter of 15.0mm and a center thickness of 2.0mm, ensuring a compact and efficient design. The edge thickness is 3.8mm, providing robustness and durability. The effective focal length (EFL) of this lens is -29.7mm, and the back focal length (BFL) is -30.3mm, indicating a strong converging capability.

The lens is made from n-BK7 Schott, a renowned optical glass known for its excellent optical properties and chemical durability. The lens features a double-concave geometry, with radii of curvature of -31.14mm for the first surface and 31.14mm for the second surface. This geometry is designed to provide superior optical performance.

The SLB-15B-30NM is coated with Opt M on both the front and back surfaces. This coating enhances the lens's performance by reducing surface reflections and increasing transmission, thereby improving the overall efficiency and quality of the optical system.