Allred D B, Mills J P
Appl Opt. 1989 Feb 15;28(4):673-81. doi: 10.1364/AO.28.000673.
The effects of Gaussian apodization on the near field of a coherent optical system having -0.8 waves of third-order spherical aberration were examined. The study concentrated on the areas near the focus in the Fresnel region of an f/12 system. Computer predictions were made for four cases: unapodized-unaberrated, apodized-unaberrated, unapodized-aberrated, and apodized-aberrated. Predictions were made for cross-sectional planes perpendicular to the optical axis using Fourier techniques. Meridional plane predictions were produced using a numerical integration method for evaluating the Kirchhoff integral. Additionally, experimental data were taken to compare with the predictions. It is shown that the experimental data match the computer predictions and that apodization is an effective method for controlling the near-field ringing due to aperture effects and spherical aberrations. Additionally, fine structure corresponding to Young's double slit interference is observed in the unapodized cases.
研究了高斯切趾对具有-0.8波三阶球差的相干光学系统近场的影响。该研究集中在f/12系统菲涅耳区域焦点附近的区域。针对四种情况进行了计算机预测：未切趾-无像差、切趾-无像差、未切趾-有像差和切趾-有像差。使用傅里叶技术对垂直于光轴的横截面进行预测。使用数值积分方法评估基尔霍夫积分来生成子午面预测。此外，还获取了实验数据以与预测结果进行比较。结果表明，实验数据与计算机预测结果相符，并且切趾是控制由于孔径效应和球差引起的近场振铃的有效方法。此外，在未切趾的情况下观察到了对应于杨氏双缝干涉的精细结构。
