Quartz glass, also known as fused silica, is renowned for its exceptional light transmittance and thermal stability, making it indispensable in precision optical and electronic industries. Understanding how its transmittance is tested and where it is applied reveals why it remains a top choice for high-performance systems.

1. Transmittance Testing Methods
The light transmittance test measures how much light passes through a quartz sample across different wavelengths. A UV–Vis–NIR spectrophotometer is commonly used for this purpose. By directing light from ultraviolet (200 nm) to infrared (2500 nm) through the sample, the instrument records the percentage of transmitted light. High-purity quartz typically shows over 90% transmittance in the visible range and maintains strong performance in the ultraviolet region, where ordinary glass rapidly absorbs energy.

2. Factors Affecting Transmittance
Impurities, surface roughness, and internal bubbles can reduce optical clarity. Therefore, high-purity raw materials and precision polishing are critical during production. In specialized cases, anti-reflective coatings are applied to further enhance transparency and optical efficiency.

3. Key Application Fields
Quartz glass is widely used in optical systems, including lenses, prisms, and windows for lasers and spectrometers. In the semiconductor industry, it serves as substrate material for wafer processing due to its resistance to heat and chemical corrosion. Additionally, its strong UV transmittance makes it ideal for UV sterilization, photolithography, and analytical instruments.

4. Advantages in Harsh Conditions
Unlike standard glass, quartz retains both optical clarity and mechanical integrity at high temperatures or in corrosive environments, ensuring long-term reliability.

Conclusion
Through precise transmittance testing and superior material purity, quartz glass proves to be an essential material in industries requiring optical precision, durability, and thermal stability.