SLB-25B-25NIR2 25.0 mm Dia. x -24.7 mm FL; Coated; Double-Concave Lens 750-1550nm

The SLB-25B-25NIR2 is a high-quality double-concave lens, designed and manufactured by OptoSigma. This lens is specifically engineered for use within the wavelength range of 750-1550nm, making it suitable for a variety of applications within the near-infrared spectrum.

The lens boasts a diameter of 25.0 mm and a focal length of -24.7 mm, providing a high level of magnification and precision. The edge thickness measures 8.4 mm, while the center thickness is a mere 2 mm, contributing to its compact and lightweight design.

The lens is made from n-BK7 Schott, a popular optical glass known for its excellent optical properties and durability. This material ensures high transmission and low dispersion, making it ideal for a wide range of optical applications.

The SLB-25B-25NIR2 is coated with Opt IR2, a broadband anti-reflection coating that further enhances its performance. This coating reduces surface reflections, improving transmission and contrast. It also provides protection against environmental factors, ensuring the longevity of the lens.

The lens features a spherical shape, which is a common geometry in optical systems due to its ease of manufacturing and excellent optical performance. The inner and outer radii are 0, indicating a symmetrical design that minimizes optical aberrations.