A facile procedure for compositional screening of chalcogenide glass (CG) is proposed to manage its infrared transmission edge (ω_c) as well as refractive index dispersion (ν) in the long-wavelength infrared (LWIR) range. Both ω_c and ν of CG turn out to be interpretable simply in connection with its chemical composition based on a postulation that CG behaves as a single average harmonic oscillator (SAHO). In this SAHO model, ω_c is expressed as a function of molar mass and average bond energy, both of which are easily accessible for a given CG composition. Two prototypical CG-forming systems in Ge-Sb-Se and Ge-Sb-S compositions exemplify the empirical compositional dependence of ω_c, which further plays a decisive role in determining ν. Following the present approach, a set of highly dispersive CG compositions in the Ge-Sb-S system is newly unveiled together with low-dispersion Ge-Sb-Se glasses. It is then experimentally demonstrated that a doublet lens configuration consisting of convex and concave lenses with low and high ν values, respectively, is able to reduce the optical aberrations. This finding presents an opportunity that ν can be envisaged just based on the compositional ratio of CG, thus facilitating completion of the LWIR Abbe diagram.

中文翻译：

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揭示硫族硫化物玻璃的化学成分与折射率色散之间的相互关系。

对于硫属化物玻璃（CG）的组成筛选一种简便方法，提出了管理其红外透射边缘（ω _{c ^}）以及在长波长红外（LWIR）范围折射率色散（ν）。两个ω _Ç CG和ν变成是简单地解释在根据公设与它的化学组成连接该CG表现为一个单一的平均谐波振荡器（萨霍）。在该模型萨霍，ω _Ç表示为摩尔质量和平均键能，这两者都是容易对于给定的组合物CG访问的功能。在锗-锑-硒和Ge-Sb的-S组成的两种原型CG-成形系统例证的ω经验组成依赖_Ç，这在确定ν中起着决定性的作用。遵循本发明的方法，Ge-Sb-S系统中的一组高分散性CG成分与低分散性Ge-Sb-Se玻璃一起被首次亮相。然后通过实验证明，分别由具有低和高ν值的凸透镜和凹透镜组成的双合透镜配置可以降低光学像差。该发现提供了仅基于CG的组成比就可以设想ν的机会，从而促进了LWIR阿贝图的完成。