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Achromatic hybrid refractive-diffractive lens with extended depth of focus

机译：扩展焦深的消色差混合折射衍射透镜

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摘要

A method for designing achromatic hybrid refractive-diffractive elements that can produce beams with long focal depths while they preserve the entire aperture for capture of light and high transverse resolution is presented. Its working principle is based on the combination of a diffractive optical element that generates a long range of pseudonondiffractive rays and a refractive lens of opposite dispersion to form an achromatic hybrid lens. A hybrid lens with a fast f-number (f/1) that works in the entire visible wave band (400-700 nm) was designed and fabricated. Simulation results demonstrate a factor-of-10 improvement in depth of focus compared with that of a conventional f/1 lens, with matching 1-mum lateral resolution. Experimental results confirm the effectiveness of the proposed method through demonstration of an achromatic hybrid lens with better than a factor-of-7 improvement in depth of focus and 1-mum transverse resolution. (C) 2004 Optical Society of America.
机译：提出了一种设计消色差混合折射衍射元件的方法，该元件可以产生具有长焦深的光束，同时保留整个孔径以捕获光并具有较高的横向分辨率。它的工作原理基于产生长距离伪非衍射光线的衍射光学元件和相反色散的折射透镜的组合，以形成消色差混合透镜。设计并制造了在整个可见光波段（400-700 nm）中工作的具有快速f值（f / 1）的混合透镜。仿真结果表明，与传统的f / 1镜头相比，焦深提高了10倍，横向分辨率为1倍。实验结果通过演示消色差混合透镜证实了所提方法的有效性，该透镜在焦点深度和1微米横向分辨率方面的改善优于7倍。 （C）2004年美国眼镜学会。

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