Quartz glass possesses remarkable optical properties, making it an essential material in various scientific and industrial applications. It allows transmission across the far-ultraviolet spectrum, outperforming all other UV-transparent materials. Additionally, it offers excellent transparency in the visible and near-infrared ranges. Users can choose from a wide range of wavelengths within the 185–3500 nm band, depending on their specific needs. Its high thermal resistance, low coefficient of thermal expansion, and strong chemical stability make it ideal for use in extreme environments. Compared to conventional optical glass, quartz glass exhibits similar levels of bubbles, streaks, homogeneity, and birefringence, ensuring reliable performance in complex optical systems. The spectral transmittance of quartz glass is influenced by several factors, including its internal structure, impurity content, and the presence of hydroxyl (OH) groups, as well as nitrogen (NO) and carbon monoxide (CO). For instance, oxygen atom bonding defects lead to an absorption peak at 0.24 μm, while OH groups cause a peak at 2.7 μm. Molecular vibrations also contribute to absorption peaks, and impurities such as metals significantly reduce ultraviolet transmittance due to atomic absorption spectra. Understanding these characteristics is crucial for optimizing the performance of quartz glass in different applications. The spectral characteristics of quartz glass play a key role in determining its suitability for specific uses. Fused silica, for example, is an excellent infrared-transparent material but suffers from poor ultraviolet transmission due to impurities. When produced using an oxyhydrogen flame, quartz glass may develop an absorption peak at 0.24 μm due to structural oxygen defects, along with OH groups, which severely limit infrared transmission. On the other hand, high-purity quartz glass made from synthetic raw materials offers the best UV transmission but still has a strong absorption peak at 2.7 μm. Only quartz glass manufactured through electrofusion or hydrogen-free flame methods can achieve broad transmission across the entire range from far ultraviolet to near infrared, making it the preferred choice for advanced optical systems. Pneumatic Single Seat Control Valve Pneumatic single seat control valve,single seat control valves,single seat control valve Pneumatic ,Pneumatic butterfly valve fluorine lined Jiangsu Tanggong Automatic Control Equipment Co., Ltd. , https://www.tgcontrolequipment.com