Large aperture high diffraction efficiency off-axis Fresnel lens fabrication and analysis

Large aperture high diffraction efficiency off-axis Fresnel lens fabrication and analysis

Large aperture high diffraction efficiency off-axis Fresnel lens is one of the most important optical elements in future 10m scale aperture transmissive space telescope systems. Improving diffraction efficiency and effective aperture are long-term goals and bottlenecks for engineering applications....

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Veröffentlicht in:Optics express 2022-08, Vol.30 (16), p.28932-28940
Hauptverfasser: Gao, Guohan, Shi, Heng, Wang, Lihua, Liu, Dun, Wang, Jiong, Du, Junfeng, Bian, Jiang, Fan, Bin, Yang, Hu
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container_end_page 28940
container_issue 16
container_start_page 28932
container_title Optics express
container_volume 30
creator Gao, Guohan
Shi, Heng
Wang, Lihua
Liu, Dun
Wang, Jiong
Du, Junfeng
Bian, Jiang
Fan, Bin
Yang, Hu
description Large aperture high diffraction efficiency off-axis Fresnel lens is one of the most important optical elements in future 10m scale aperture transmissive space telescope systems. Improving diffraction efficiency and effective aperture are long-term goals and bottlenecks for engineering applications. A 4-level off-axis fresnel lens with Ф350 mm effective aperture and 2 µm critical dimension was fabricated through overlay etching technique bylaser direct writing system. Average diffraction efficiency of 75.9% was achieved and certain distribution pattern was observed. Influence of alignment errors on diffraction efficiency distribution was analysed and discussed in detail. This work presented the best results to our knowledge among the same field with similar aperture and critical dimension in open publications, and layed a solid foundation for future large aperture diffractive telescope development.
doi_str_mv 10.1364/OE.464494
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title Large aperture high diffraction efficiency off-axis Fresnel lens fabrication and analysis
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