67-988 9.0mm Dia. x -12 FL; NIR II Coated; Plano-Concave Lens 750-1550nm

This is a 9.0mm diameter Plano-Concave lens, model number 67-988, with a focal length of -12, sourced from the renowned optical component vendor, Edmund Optics. The lens is designed for use within the near-infrared spectrum, specifically optimized for the 750-1550nm range, making it ideal for applications such as night vision, thermal imaging, and optical communication systems.

The lens is constructed from N-SF11 Schott glass, a material known for its excellent optical properties, including high transmittance and low auto-fluorescence in the NIR region. The lens geometry features a thicker edge (3.24mm) that gradually tapers towards the center (2.25mm), a design that contributes to the lens's concave shape. The inner and outer radii are both zero, indicating a uniform curvature across the lens surface.

The lens is coated with Edmund Optics' standard NIR-II coating on both the front and back surfaces. This coating is specifically designed to enhance the lens's performance within the NIR spectrum, reducing surface reflections and improving transmission. The coating curve is also standard, ensuring consistent performance across a wide range of applications.