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Reducing aberration effect of Fourier transform lens by modifying Fourier spectrum of diffractive optical element in beam shaping optical system

机译:通过在光束整形光学系统中修改衍射光学元件的傅立叶光谱来降低傅立叶变换透镜的像差效应

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摘要

In general, Fourier transform lenses are considered as ideal in the design algorithms of diffractive optical elements (DOEs). However, the inherent aberrations of a real Fourier transform lens disturb the far field pattern. The difference between the generated pattern and the expected design will impact the system performance. Therefore, a method for modifying the Fourier spectrum of DOEs without introducing other optical elements to reduce the aberration effect of the Fourier transform lens is proposed. By applying this method, beam shaping performance is improved markedly for the optical system with a real Fourier transform lens. The experiments carried out with a commercial Fourier transform lens give evidence for this method. The method is capable of reducing the system complexity as well as improving its performance. (C) 2015 Optical Society of America
机译:通常,在衍射光学元件(DOE)的设计算法中,傅立叶变换透镜被认为是理想的。然而,真正的傅立叶变换透镜的固有像差会干扰远场图案。生成的模式和预期的设计之间的差异将影响系统性能。因此,提出了一种在不引入其他光学元件的情况下修改DOE的傅立叶光谱以减小傅立叶变换透镜的像差效果的方法。通过应用此方法,对于具有真实傅立叶变换透镜的光学系统,光束成形性能得到了显着改善。用商业傅立叶变换透镜进行的实验为该方法提供了证据。该方法能够降低系统复杂度并改善其性能。 (C)2015年美国眼镜学会

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