Crafted from premium JGS-1 optical quartz glass, ensuring superior clarity and durability for applications. Features a 55mm diameter and 80mm focal length, making it ideal for a variety of optical setups and experiments. Achieves exceptional surface accuracy of /4@632.8nm, providing reliable performance in precision optical systems. devised with a ±0.05mm thickness tolerance and ±1% focal length tolerance for consistent and accurate results. Versatile use in U-V visible spectrophotometers, with excellent transmittance across U-V and visible light ranges.