49-552 25mm Dia. x -100mm FL; NIR I Coated; Double-Concave Lens 600-1050nm

The 49-552 is a double-concave lens with a diameter of 25mm and a focal length of -100mm, making it a negatively powered lens. This lens is sourced from Edmund Optics, a reputable vendor known for their high-quality optical components. The lens is designed for use in the near-infrared (NIR) spectrum, specifically between 600-1050nm, making it suitable for a wide range of applications in this spectral range.

The lens is made from N-BK7 Schott glass, a common material in optical systems due to its excellent optical properties and high Abbe number. The N-BK7 Schott glass ensures high transmittance and low dispersion, which are crucial for NIR applications.

The 49-552 lens features a standard curve coating on both the front and back surfaces. This coating, known as EDM NIR-I std curve, is specifically designed to enhance the lens' performance in the NIR spectrum. It reduces surface reflections, thereby increasing the amount of light transmitted through the lens. This coating also provides protection against environmental factors, ensuring the longevity of the lens.

The lens has a center thickness of 5mm and an edge thickness of 6.43mm, providing robustness and durability. The inner and outer radii are 0mm, indicating a symmetrical design. The effective focal length (EFL) is -101.64mm, and the radius of curvature for the first and second surfaces are -104.2mm and 104.2mm, respectively.