SLB-25B-80NIR2 25.0 mm Dia. x -79.7 mm FL; Coated; Double-Concave Lens 750-1550nm

The SLB-25B-80NIR2 is a high-quality double-concave lens, 25.0 mm in diameter, and featuring a focal length of -79.7 mm. This lens is sourced from OptoSigma, a renowned vendor known for their precision optical components.

The lens is made from n-bk7 schott, a popular material in the optical industry due to its excellent optical properties. The base shape of the lens is circular, and it has a thickness of 4 mm at the edge and 2 mm at the center. The effective focal length (EFL) is -79.7 mm, and the back focal length (BFL) is -80.3 mm.

The lens is coated with opt ir2 on both the front and back surfaces, providing superior performance in the 750-1550nm wavelength range. This coating enhances the lens's durability and resistance to environmental factors, making it suitable for various applications.

The lens's geometry, including its inner and outer radii, is optimized for high-performance applications. The first radius of curvature (R1) is -83.04 mm, and the second radius of curvature (R2) is 83.04 mm, demonstrating the lens's double-concave design.