SLB-15B-25NM 15.0 mm Dia. x -24.7 mm FL; Coated; Double-Concave Lens 400-700nm

The SLB-15B-25NM is a high-quality double-concave lens, 15.0 mm in diameter, designed for use within the wavelength range of 400-700nm. Manufactured by OptoSigma, a trusted name in the optical industry, this lens boasts a focal length of -24.7 mm, making it ideal for a variety of applications.

The lens is constructed from n-BK7 Schott, a popular optical glass due to its excellent transparency in the visible spectrum. The base shape of the lens is circular, with a thickness of 4.2 mm at the edge and 2 mm at the center. The inner and outer radii are 0 mm, and the lens features a double-concave geometry with radii of curvature of -25.95 mm and 25.95 mm for the front and back surfaces, respectively.

The SLB-15B-25NM comes with a broadband anti-reflection coating on both the front and back surfaces, reducing reflection losses and improving transmission within the specified wavelength range. This coating, denoted as 'opt m', ensures high-performance imaging and light transmission, making this lens suitable for use in various optical systems.