Yang Liu, Liu Hongjun, Dai Shixun, Lin Changgui
Opt Lett. 2023 Mar 15;48(6):1431-1433. doi: 10.1364/OL.479835.
Chalcogenide glass has become one of the essential IR lens materials in passively athermalized long-wave IR devices. However, that there is no multispectral chalcogenide glass capable of large-size fabrication raises challenges to the development and popularization of multispectral imaging systems combining visible, near-IR, and mid-IR. In this work, we developed a novel chalcogenide glass capable of a record-big (Ø120 mm) fabrication through the compositional optimization of GeS-GaS-CsCl glass with introduction of SbS. Its transmission window is characterized as ranging from 0.51 to 11.2 µm, which means it could be employed as a multispectral lens transmitting visible and IR signals in a co-aperture IR optical system. In addition, a method of three-stage thermal analysis is proposed to evaluate the glass-forming ability of chalcogenide glass through simulating the melt-quenching process of chalcogenide melt in a vacuum-sealed silica ampoule. This work not only shows an innovative multispectral chalcogenide glass with promising applications but also introduces a simple and convenient technique for screening chalcogenide glass with ultrahigh glass-forming ability capable of large-size fabrication.
硫属化物玻璃已成为被动式消热差长波红外器件中必不可少的红外透镜材料之一。然而，目前尚无能够进行大尺寸制造的多光谱硫属化物玻璃，这给结合可见光、近红外和中红外的多光谱成像系统的开发和推广带来了挑战。在这项工作中，我们通过在GeS-GaS-CsCl玻璃中引入SbS进行成分优化，开发出了一种新型硫属化物玻璃，其能够制造出创纪录的大尺寸（直径120毫米）产品。其透射窗口的特征范围为0.51至11.2微米，这意味着它可被用作在共孔径红外光学系统中传输可见光和红外信号的多光谱透镜。此外，还提出了一种三阶段热分析方法，通过模拟硫属化物熔体在真空密封石英安瓿中的熔体淬火过程来评估硫属化物玻璃的玻璃形成能力。这项工作不仅展示了一种具有广阔应用前景的创新型多光谱硫属化物玻璃，还引入了一种简单便捷的技术，用于筛选具有超高玻璃形成能力、能够进行大尺寸制造的硫属化物玻璃。
