The study of hybrid refractive-diffractive telephoto lens
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摘要: 为了突破长焦物镜传统设计中的局限性,从衍射面的相位多项式出发,结合一般透镜的相位变换式,对折衍混合消像差理论进行了探讨。给出了仅使用1种材料FK1、2片型的长焦物镜系统设计结构,并将此设计结果与传统的5片型、5种材料的纯折射长焦物镜的光学性能进行了比较。结果表明,利用折衍混合能有效地校正长焦物镜的像差,极大地降低系统的重量和复杂程度,不失为长焦物镜设计的一条有效途径。Abstract: In order to break through the choke point of the traditional design of a telephoto lens,how to eliminate aberrance by means of hybrid refraction-diffraction was studied from the view of the phase polynomial of diffractive surface and phase transformation polynomial of general lens.The telephoto lens system consisted of only two pieces of optical elements made of FK1 glass has an equivalent optical performance to the traditional telephoto lens system made of five pieces of optical elements made of defferent kinds of glass.Which shows that the hybrid refractive-diffractive lens can effectively eliminate the aberrance of a telephoto lens with lower weight and simple structure.
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