SLB-50B-70NIR2 50.0 mm Dia. x -69.5 mm FL; Coated; Double-Concave Lens 750-1550nm

OptoSigma presents the SLB-50B-70NIR2, a high-quality double-concave lens designed for use within the 750-1550nm wavelength range. This lens boasts a 50.0 mm diameter and a focal length of -69.5 mm, making it suitable for a wide array of applications.

The lens is constructed from n-BK7 Schott glass, a popular material in the optical industry due to its excellent homogeneity, low optical dispersion, and high transmittance in the visible and near-infrared regions. The n-BK7 Schott glass ensures high-quality imaging and minimal chromatic aberration.

The SLB-50B-70NIR2 features a double-concave geometry with radii of curvature of -72.66 mm on both the front and back surfaces. This geometry results in a biconvex lens with a high negative power, perfect for imaging applications requiring strong optical correction.

The lens's edges have a thickness of 11.9 mm, while the center thickness measures 3 mm, providing sufficient mechanical strength and rigidity. The lens's design incorporates an inner radius of 0 mm and an outer radius of 0 mm, ensuring optimal light transmission and minimal distortion.

Coated with Opt IR2 on both the front and back surfaces, this lens offers improved resistance to scratches and environmental factors, ensuring longevity and reliability in various conditions. The coating also enhances the lens's transmittance within the specified wavelength range, making it an ideal choice for near-infrared applications.