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Lens having extended depth of focus, method for designing the same, and optical system having the same
Lens having extended depth of focus, method for designing the same, and optical system having the same
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机译:具有扩大的焦深的透镜,其设计方法以及具有该透镜的光学系统
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摘要
The lens includes a plurality of lens layers, each lens layer being axi-symmetric and having an extended depth of focus to focus light in a corresponding section of a focal curve in the form of a straight line located on an optical axis. In the optical system, light is focused on an optical axis to obtain a clear image in a wide distance range between a camera and an object. The optical system has a point spread function that is simpler and more symmetric. That is, the optical system provides improved continuity of a lens surface and easiness and flexibility in optical designing.
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