Gradient refractive index chalcogenide lens for lightweight infrared dual-band imaging systems
Year: 2025
Type: article
Abstract: In this study, we report the development of Ge 15 Se 85−x Te x (GSTx) chalcogenide glass-based gradient refractive index (GRIN) lenses for lightweight dual-band infrared imaging systems. The GSTx glasses exhibit compatible thermal properties (Δ T g < 9 °C), significant refractive index contrast (Δ n > 0.27), and high transmittance (> 57%). Through systematic dispersion characterization of GSTx glasses, we identify the GST0/GST25 pair as optimal glass sheets. The refractive index profile of the GRIN glass was quantitatively characterized by correlating Raman peak intensity ratios (Ge-Se/Se-Se bond vibrations) with the number of chemical bonds within the glass. Compared to a 4-element homogeneous system, the GRIN-incorporated design achieves 21.4% length reduction and 84.9% weight reduction. Providing a new full-chain solution for lightweight dual-band infrared imaging systems.
Source: Optics Express
DOI: 10.1364/oe.577730
Authors: Yongnian Guan, Kelun Xia, Zhengxiang Gu, Senlin Yan, Xiaodong Chen, Xunsi Wang, Shixun Dai, Xiang Shen, Zijun Liu
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
OpenAlex ID: W4415650103