SLB-40B-40NM 40.0 mm Dia. x -39.7 mm FL; Coated; Double-Concave Lens 400-700nm

The SLB-40B-40NM 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 40.0 mm and a center thickness of 2.0 mm, while the edge thickness measures 12.3 mm. The effective focal length (EFL) of this lens is -39.7 mm, and the back focal length (BFL) is -40.3 mm. The first radius of curvature (R1) is -41.52 mm, and the second radius (R2) is 41.52 mm.

The lens is made from n-BK7 Schott, a popular optical glass due to its excellent optical properties and relatively low cost. The lens features a spherical shape, a common geometry in optical systems due to its ease of manufacturing and high optical quality.

The SLB-40B-40NM is coated with Opt M on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and increasing transmission, thereby improving the overall efficiency and quality of the optical system in which it is used.

According to the vendor's information, this item is currently in stock, ensuring quick delivery times for your optical project needs. For more detailed information, you can refer to the vendor's website using the provided weblink.