Crafted from premium JGS-1 optical quartz glass, ensuring superior and durability for various optical applications. Features a diameter of 55mm and a focal length of 80mm, making it ideal for precise imaging and light manipulation in scientific instruments. Exceptional surface accuracy of /4@632.8nm and high precision with ±0.05mm thickness tolerance and ±1% focal length tolerance for reliable performance. devised for high transmittance across U-V and visible light spectra, perfect for use in U-V visible spectrophotometers and other optical devices. Robust construction with a radius of curvature of 36.72mm and an edge thickness of 4mm, ensuring optimal light transmission and minimal distortion.