Crafted from premium JGS-1 quartz s, this double convex lens ensures excellent optical performance and durability. Features a diameter of 40mm and a focal length of 33.1mm, making it ideal for various optical applications. High surface accuracy of /4@632.8nm and thickness tolerance of ±0.05mm guarantees precision in your optical setups. Transmittance range of 185nm-2500nm, suitable for and visible light applications, perfect for spectrophotometry. Designed with a radius of curvature of 20.4mm and edge thickness of 2mm, ensuring optimal light focusing capabilities.