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8～12μm波段的军用被动红外光学系统问世已经十五年多了。随着人们对分辨率和灵敏度的要求越来越高,系统设计也越来越复杂。从前红外光学系统采用单一的锗光学元件,而现在则应用多种光学材料,使光学设计者能校正8～12μm波段的色差。为此,广泛采用了透红外光学玻璃。象任何其它光学玻璃一样,它是用熔融体进行铸造或浇铸成型的。本文将介绍红外玻璃的制造方法,给出光学应用方面的相当重要的物理参数,并与工业标准锗进行比较。此外也将讨论鉴定其品质特性所使用的方法。
Military passive infrared optical system of 8 ~ 12μm band has come out more than fifteen years. As people become increasingly demanding in terms of resolution and sensitivity, system design is becoming more and more complex. In the past, the single-germanium optics were used in the infrared optics, and a variety of optical materials are now used to enable the optical designer to correct the chromatic aberration in the 8 to 12 μm band. To this end, extensive use of infrared optical glass. Like any other optical glass, it is molded or cast from a melt. This article describes the manufacturing of infrared glass, gives quite significant physical parameters for optical applications, and compares it with industry standard germanium. In addition, the methods used to identify their quality characteristics will also be discussed.