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Proceedings Paper

Preparation and optical properties of transparent polycrystalline ZnS bulk materials
Author(s): Shaohua Wu; Jinsong Zhao; YueJin Zhao; Wenming Yang; Haijuan Cheng; Jie Jiang; Maozhong Li
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Paper Abstract

The transmittance of chemical vapor deposition (CVD) ZnS can be effectively improved through the processing of hot isostatic pressing (HIP) in inert gas, especially in the waveband of visible light and near infrared. In general, the size of the particles of the polycrystalline ZnS bulk material can be increased after the processing of HIP. This change can definitely affect the optical properties and mechanical properties of the material. In this paper, a two-step method was applied to improve preparation of transparent polycrystalline ZnS bulk materials. The first step was the growth of polycrystalline ZnS through dynamic CVD. Then the grown polycrystalline ZnS bulk materials was annealed in inert gas at 800~900°C for 10~50 h. Experimental results showed that the optical properties and mechanical properties of the materials have been significantly improved. The average transmission rate of the materials was over 74% in the wavebands 8~12 μm and was over 70% in the mid-infrared 3~5 μm. The absorption peak of the materials at 6 μm attributed to Zn-H complex and S vacancy was obviously decreased. Furthermore, results of imaging experiments showed that lenses made of the annealed transparent polycrystalline ZnS bulk materials has excellent performance in optical properties and modulation transfer function (MTF).

Paper Details

Date Published: 9 November 2018
PDF: 9 pages
Proc. SPIE 10826, Infrared, Millimeter-Wave, and Terahertz Technologies V, 108261I (9 November 2018); doi: 10.1117/12.2501910
Show Author Affiliations
Shaohua Wu, Beijing Institute of Technology (China)
Kunming Institute of Physics (China)
Yunnan KIRO-CH Photonics Co., Ltd. (China)
Jinsong Zhao, Kunming Institute of Physics (China)
YueJin Zhao, Beijing Institute of Technology (China)
Wenming Yang, Beijing Institute of Technology (China)
Haijuan Cheng, Kunming Institute of Physics (China)
Yunnan KIRO-CH Photonics Co., Ltd. (China)
Beijing Institute of Technology (China)
Jie Jiang, Kunming Institute of Physics (China)
Yunnan KIRO-CH Photonics Co., Ltd. (China)
Maozhong Li, Kunming Institute of Physics (China)
Yunnan KIRO-CH Photonics Co., Ltd. (China)


Published in SPIE Proceedings Vol. 10826:
Infrared, Millimeter-Wave, and Terahertz Technologies V
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

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