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Analysis of extended depth of focus systems with complex pupil decomposition

机译：复杂瞳孔分解的扩展深度分析

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Extended Depth of Focus (EDOF) systems have a broad set of applications in optics including enhancement of microscopy images and the treatment of presbyopia in the aging eye. The goal of EDOF systems is to axially elongate the region of focus for the optical system while simultaneously keeping the transverse dimension of the focus small to ensure resolution. The pinhole effect of reducing the size of the aperture is a well-known means of extending the depth of focus. The pinhole effect however has the drawback of reducing the light entering the system and reducing the resolution of the image. Alternatively, phase masks can be placed in the pupil to enhance depth of focus, maintain light levels and improve resolution relative to the pinhole system. Here, a technique for decomposing these phase masks into a set of quadratic phase factors is explored. Each term in the set acts like a lens and the foci of these lenses add coherently to give the overall focus profile of the system. This technique can give insight into existing EDOF techniques and be used to create novel EDOF phase masks.
机译：扩展深度焦点（EDOF）系统在光学中具有广泛的应用，包括增强显微镜图像和衰老眼中老花眼的治疗。 EDOF系统的目标是轴向伸长光学系统的焦点区域，同时保持焦点的横向尺寸，以确保分辨率。减小孔径尺寸的针孔效应是延伸焦深的众所周知的方法。然而，针孔效应具有减少进入系统的光并降低图像的分辨率的缺点。或者，可以将相掩模放置在瞳孔中以增强焦深，保持光水平并改善相对于针孔系统的分辨率。这里，探讨了将这些相位掩模分解成一组二次阶段因子的技术。该组中的每个术语采用类似透镜和这些透镜的焦点相结合，以提供系统的整体聚焦轮廓。该技术可以介绍现有的EDOF技术，用于创建新的EDOF相位掩模。

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