Abstract:Oxyfluoride glass possesses good infrared (IR) transmission properties, and can realize low cost, short cycle and large-scale preparation. With the continuous innovation of optoelectronic countermeasure technology and the continuous progress of optical system technology, higher requirements are put forward for IR glass with super large size and high performance. Based on this, after more than ten years of technology accumulation, Shanghai Institute of Optics and Fine Mechanics (SIOM) has achieved the first breakthrough in the preparation of meter-scale, high-performance gallate oxyfluoride IR glass and hemispherical fairing with large size through precision temperature field control technology and dehydroxylation and platinum removal technology. This material can be used as an IR window in many fields such as new generation IR detection.