The 63-642 is a high-quality double-convex lens, 15mm in diameter and 60mm in focal length, sourced from the renowned optical components vendor, Edmund Optics. This lens is designed for use within the near-infrared (NIR) spectrum, specifically between 600 and 1050 nanometers, making it suitable for a wide range of applications in fields such as biomedical imaging, spectroscopy, and night vision technology.
The lens is crafted from n-BK7 Schott, a popular optical glass due to its excellent optical properties and versatility. It boasts a standard edge thickness of 2.08mm and a center thickness of 3mm, providing robustness and durability. The lens's geometry, with radii of curvature of 61.5mm for both the front and back surfaces, results in a back focal length of 59mm, contributing to its high-performance imaging capabilities.
The 63-642 lens features a proprietary NIR I coating on both the front and back surfaces. This coating, developed by Edmund Optics, is designed to enhance the lens's performance within the NIR spectrum, reducing surface reflections and increasing transmission. The coating complies with the standard EDM NIR-I curve, ensuring consistent performance across different lenses.