49-543 9mm Dia. x -9mm FL; NIR I Coated; Double-Concave Lens 600-1050nm

The 49-543 is a high-quality double-concave lens, boasting a 9mm diameter and a focal length of -9mm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available in stock on their website. The lens is designed for use within the near-infrared (NIR) spectrum, specifically optimized for wavelengths around 587.6nm.

The lens is constructed from Schott's n-SF11 material, a popular choice for its high refractive index and low dispersion. This makes the lens particularly suitable for applications requiring high optical performance, such as imaging systems, beam shaping, or laser applications.

The 49-543 lens features a double-concave geometry, with radii of curvature of -14.6mm and 14.6mm for the front and back surfaces, respectively. This geometry results in a back focal length of -9.61mm, providing a compact and efficient optical solution. The lens has a central thickness of 2.25mm and an edge thickness of 3.48mm, contributing to its robustness and durability.

The lens is coated with Edmund Optics' standard NIR-I coating on both the front and back surfaces. This coating is designed to enhance the lens' performance within the NIR spectrum, improving transmission and reducing reflection. The coating status is reported as 'Valid - in stock', indicating that it is ready for immediate use.