SLB-25.4B-100NIR2 25.4 mm Dia. x -99.7 mm FL; Coated; Double-Concave Lens 750-1550nm

The SLB-25.4B-100NIR2 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 25.4mm, with a center thickness of 2mm and an edge thickness of 3.6mm. The double-concave design, characterized by radii of curvature of -103.8mm on the front surface and 103.8mm on the back surface, results in a back focal length of -100.4mm. This particular configuration is ideal for applications requiring a negative lens with a long focal length.

The lens is crafted from n-BK7 Schott glass, a material known for its excellent optical properties and high transmittance in the near-infrared region. This, coupled with the lens's precise geometry, ensures high-quality imaging and minimal optical aberrations.

The SLB-25.4B-100NIR2 is further enhanced with an Opt IR2 coating on both the front and back surfaces. This anti-reflection coating is specifically designed to reduce surface reflections and increase transmission within the 750-1550nm range. The coating also provides protection against environmental factors, ensuring the longevity and durability of the lens.