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低成本,大批量,可制造的0.88 NA多波长衍射镜片阵列用于光学文档安全.

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    此摘要是机器生成的。

    我们开发了一种新的多波长衍射微镜阵列 (MLA),用于先进的防伪. 这种高数字孔径的MLA提供了扩展的焦点深度,并使安全文件的成本效益高,大量生产成为可能.

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    科学领域:

    • 光学和光子学 在光学和光子学.
    • 材料科学 材料科学 材料科学
    • 纳米技术纳米技术

    背景情况:

    • 折射微镜阵列 (MLA) 在实现高数值孔径 (NA) 和多波长聚焦方面面临局限性.
    • 现有的文档安全解决方案缺乏集成先进的光学功能,以进行强大的防伪.

    研究的目的:

    • 设计,制造和表征一个高NA,多波长衍射MLA.
    • 为了证明这种MLA在色彩整体成像中用于防伪目的的应用.
    • 为了突出衍射MLA相对于折射MLA的优点,用于特定的应用.

    主要方法:

    • 在聚合物薄膜上使用紫外线造制造多层衍射微镜阵列 (MLA).
    • 描述MLA的光学性能,包括数值光圈 (NA=0.88),多波长聚焦 (480 nm,550 nm,650 nm) 和焦点深度 (DoF).
    • 整合MLA与高分辨率纸币打印,用于反伪造示威活动.

    主要成果:

    • 实现了多波长聚焦,DoF是衍射限值的两倍.
    • 在三个设计波长的聚焦光线进入一个点,在半最大 (FWHM) 的全宽度约为310 nm.
    • 证明有效的色彩整体成像用于防伪的纸币,最小特征宽度为10-15微米.

    结论:

    • 与高NA,多波长应用的折射MLA相比,开发的衍射MLA提供了优越的性能.
    • 紫外线造使这些先进的平面光学能够以低成本,大批量生产.
    • MLA非常适合在纸币和文件中增强安全特征.