Characteristics:
Superior Spectral Transmittance: Compared to ordinary optical glass, Fused Silica exhibits high transmittance across an extremely broad spectral range, particularly excelling in the ultraviolet band. It efficiently transmits light from deep ultraviolet (DUV) to near-infrared wavelengths, making it indispensable in fields such as ultraviolet lithography and fluorescence detection.
Extremely low thermal expansion coefficient: Fused Silica glass exhibits an exceptionally low thermal expansion coefficient, meaning drastic changes in ambient temperature have negligible effects on its shape and dimensions. This high thermal stability ensures optical systems maintain consistent focal length and imaging quality even in variable temperature environments, making it crucial for applications such as space telescopes and high-power laser systems.
High laser damage threshold: Fused Silica material possesses exceptional purity and homogeneity, enabling it to withstand sustained or pulsed irradiation from high-energy lasers without significant damage. This makes it an ideal choice for focusing lenses in high-energy laser systems, including laser cutting, welding, and scientific research lasers.
Exceptional Chemical Stability and Mechanical Properties: Fused Silica glass exhibits high corrosion resistance, withstanding most acids, alkalis, and moisture. Its high hardness and scratch resistance ensure long-term durability in demanding industrial environments.

Applications:
Semiconductor Manufacturing and Lithography: This represents one of the most typical and demanding applications for Fused Silica spherical lenses. The illumination and projection objective systems within lithography machines consist of numerous precisely arranged Fused Silica lenses. Leveraging their exceptional ultraviolet transmittance, these lenses project circuit patterns from masks onto silicon wafers with high precision, forming a core process in chip manufacturing.
Astronomy and Space Exploration: Fused Silica lenses are extensively used in subsystems such as guide star systems and spectrometers for large astronomical telescopes. Their high thermal stability ensures telescopes maintain exceptional observational accuracy in outdoor or space environments with extreme day-night temperature fluctuations, capturing faint starlight from deep space.
High-Energy Laser Systems: In industrial processing and scientific research, high-power lasers require optical components capable of focusing immense energy without damage. Fused Silica spherical lenses, with their high laser damage threshold and thermal stability, serve as focusing lenses, beam expanders, and cavity mirrors in laser heads, ensuring stable system operation.
Life Sciences and Analytical Instruments: Biomedical equipment like ultraviolet spectroscopy analyzers, DNA sequencers, and fluorescence microscopes require ultraviolet light to excite samples. Fused Silica lenses' high UV transmittance ensures efficient light source utilization and sensitive signal detection, enhancing instrument accuracy and reliability.
Industrial Inspection and High-End Photography: In industrial defect detection systems requiring UV or deep UV light sources, Fused Silica lenses are critical for imaging. Additionally, some high-end photographic lenses pursuing ultimate image quality incorporate Fused Silica elements to minimize chromatic aberration and enhance resolution.

Fused Silica spherical lenses, with their unique combination of optical, thermal, mechanical, and chemical properties, serve as the “precision eyes” bridging the microscopic world of chips and the vast macrocosm of the universe.
Yutai Optics offers Fused Silica spherical lenses in various materials (JGS1, JGS2, JGS3, Corning 7980, Corning 7979, etc.). Please feel free to contact us for more information.