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。

Chalcogenide glasses is an ideal infrared transmitting optical material, were widely applied in the area of infrared thermal imaging which requires chalcogenide glasses not only have properties advantages for example larger transmission and better homogeneity and larger size, but also have processing characteristic with large volume and low cost. The key to effective satisfied above mentioned requirements is glass′s melting technology. The vaccum melting technology in sealed ampoule and vacuum/atmosphere melting technology in crucible and their equipments were introduced. Specially a new chalcogenide glass melting method was mentioned and explained, which was a second melting protected with atmosphere, the influences on transmitting diagram and internal optical character and homogeneity melted with atmosphere protective were analyzed in detail. Glass′s transmission was closed to those melted in sealed ampoule, in addition the internal optical character and homogeneity were improved via second melting protected with nitrogen atmosphere which purity is 99.999%.