Infrared chalcogenide glass aspherical microlens array fabricated using glass-to-glass molding

Liheng Gao; Tianfeng Zhou; Qian Yu; Gang Wang; Zhikang Zhou; Xiaoqiang Yao; Xibin Wang

doi:10.1117/12.3047976

13 November 2024 Infrared chalcogenide glass aspherical microlens array fabricated using glass-to-glass molding

Liheng Gao, Tianfeng Zhou, Qian Yu, Gang Wang, Zhikang Zhou, Xiaoqiang Yao, Xibin Wang

Author Affiliations +

Proceedings Volume 13280, Advanced Optical Manufacturing Technologies and Applications 2024; and Fourth International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2024); 132800Z (2024) https://doi.org/10.1117/12.3047976
Event: Second Conference on Advanced Optical Manufacturing Technologies and Applications & Fourth Forum of Young Scientists on Advanced Optical Manufacturing, 2024, Xi'an, China

Abstract

Precision glass molding (PGM) represents a highly effective method for producing infrared chalcogenide (ChG) glass aspherical microlens arrays (AMLA). However, ChG glass, primarily composed of Ge, As, and Te, exhibits lower chemical stability compared to typical silicate glass. When subjected to high temperatures and pressures during molding with a nickel-phosphorus (Ni-P) mold, ChG glass tends to react with the Ni element, resulting in the formation of a shielding layer on the lens surface. This phenomenon significantly impacts the infrared transmittance of the ChG glass lens, rendering Ni-P mold unsuitable for direct apply in ChG glass PGM. Ni-P mold can be effectively utilized for the high-temperature molding of silicate glass, serving as the intermediate mold for subsequent low-temperature molding of ChG glass. This dual-step approach has been validated by detailed analysis of the profiles of the final ChG glass AMLA, thereby providing a viable method for the fabrication of ChG glass AMLA through PGM.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Liheng Gao, Tianfeng Zhou, Qian Yu, Gang Wang, Zhikang Zhou, Xiaoqiang Yao, and Xibin Wang "Infrared chalcogenide glass aspherical microlens array fabricated using glass-to-glass molding", Proc. SPIE 13280, Advanced Optical Manufacturing Technologies and Applications 2024; and Fourth International Forum of Young Scientists on Advanced Optical Manufacturing (AOMTA and YSAOM 2024), 132800Z (13 November 2024); https://doi.org/10.1117/12.3047976

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