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硫系玻璃是一种理想的红外光学透过材料,在红外热成像技术领域具有显著的应用价值。红外热成像技术要求所用硫系玻璃材料具有高透过、高均匀、大尺寸等性能优势和批量化、低成本制备特点,玻璃的熔制技术是有效解决上述需求的关键所在。概括介绍了硫系玻璃的真空密封安瓿瓶熔制、真空/气氛保护坩埚熔制技术和装置,特别提出和说明了一种硫系玻璃熔制新方法——气氛保护下的二次熔制方法,详细分析了该方法对硫系玻璃的光谱性能、内在光学质量和光学均匀性的影响,研究发现:随着保护气体纯度提高到99.999%,二次熔制后玻璃的光谱透过性能与真空密封安瓿瓶中接近,玻璃的内在光学质量和光学均匀性均显著改善。
Sulfur-based glass is an ideal infrared optical transmission material, which has significant application value in the field of infrared thermography. Infrared thermography requires that the sulfur-based glass materials used have the performance advantages of high transmission, high uniformity, large size, etc., and the characteristics of batch and low-cost preparation. The melting technology of glass is the key to effectively solve the above requirements. In this paper, the vacuum sealed ampoule melting system and vacuum / atmosphere protection crucible melting technology and device of sulfur-based glass are introduced in detail. In particular, a new method of melting of chalcogenide glass , The effect of the method on the spectral properties, intrinsic optical quality and optical uniformity of the chalcogenide glass has been analyzed in detail. The results show that with the increase of the purity of the protective gas up to 99.999%, the spectral transmittance of the glass after the second melting and the vacuum Close to the sealed ampoules, the intrinsic optical quality and optical uniformity of the glass are significantly improved.