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Wavefront-aberration measurement and systematic-error analysis of a high numerical-aperture objective

机译:高数值孔径物镜的波前像差测量和系统误差分析

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摘要

A two-dimensional (2-D) shearing interferometer based on an amplitude chessboard grating was designed to measure the wavefront aberration of a high numerical-aperture (NA) objective. Chessboard gratings offer better diffraction efficiencies and fewer disturbing diffraction orders than traditional cross gratings. The wavefront aberration of the tested objective was retrieved from the shearing interferogram using the Fourier transform and differential Zernike polynomial-fitting methods. Grating manufacturing errors, including the duty-cycle and pattern-deviation errors, were analyzed with the Fourier transform method. Then, according to the relation between the spherical pupil and planar detector coordinates, the influence of the distortion of the pupil coordinates was simulated. Finally, the systematic error attributable to grating alignment errors was deduced through the geometrical ray-tracing method. Experimental results indicate that the measuring repeatability (3a) of the wavefront aberration of an objective with NA 0.4 was 3.4 mλ. The systematic-error results were consistent with previous analyses. Thus, the correct wavefront aberration can be obtained after calibration.
机译:设计了一种基于振幅棋盘光栅的二维(2-D)剪切干涉仪,用于测量高数值孔径(NA)物镜的波前像差。棋盘格光栅比传统的交叉光栅具有更高的衍射效率和更少的扰动衍射级。使用傅立叶变换和微分Zernike多项式拟合方法从剪切干涉图中检索被测物镜的波前像差。使用傅里叶变换法分析了光栅制造误差,包括占空比和图案偏差。然后,根据球面瞳孔与平面检测器坐标之间的关系,模拟了瞳孔坐标畸变的影响。最后,通过几何射线追踪法推导了归因于光栅对准误差的系统误差。实验结果表明,NA为0.4的物镜的波前像差的测量重复性(3a)为3.4mλ。系统误差结果与以前的分析一致。因此,在校准之后可以获得正确的波前像差。

著录项

  • 来源
    《Optical engineering》 |2018年第2期|024107.1-024107.9|共9页
  • 作者单位

    Chinese Academy of Sciences, Institute of Optics and Electronics, Chengdu, China,University of Electronic Science and Technology of China, School of Optoelectronic Science and Engineering, Chengdu, China,University of Chinese Academy of Sciences, Beijing, China;

    Chinese Academy of Sciences, Institute of Optics and Electronics, Chengdu, China;

    University of Electronic Science and Technology of China, School of Optoelectronic Science and Engineering, Chengdu, China;

    Chinese Academy of Sciences, Institute of Optics and Electronics, Chengdu, China,University of Electronic Science and Technology of China, School of Optoelectronic Science and Engineering, Chengdu, China,University of Chinese Academy of Sciences, Beijing, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    chessboard grating; grating alignment; shearing interferometer; wavefront metrology;

    机译:棋盘格光栅对准剪切干涉仪波前计量;

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