张耀举. 二元环形孔径全空间轴线上的衍射光强分布[J]. 应用光学, 2004, 25(2): 15-18.
引用本文: 张耀举. 二元环形孔径全空间轴线上的衍射光强分布[J]. 应用光学, 2004, 25(2): 15-18.
ZHANG Yao-ju. Axial Irradiance Distribution Throughout the Entire Space Behind a Binary Annular Aperture[J]. Journal of Applied Optics, 2004, 25(2): 15-18.
Citation: ZHANG Yao-ju. Axial Irradiance Distribution Throughout the Entire Space Behind a Binary Annular Aperture[J]. Journal of Applied Optics, 2004, 25(2): 15-18.

二元环形孔径全空间轴线上的衍射光强分布

Axial Irradiance Distribution Throughout the Entire Space Behind a Binary Annular Aperture

  • 摘要: 运用Rayleigh-Sommerfeld衍射积分,详细推导了二元环形孔径全空间在轴光强分布公式.由于未作明显的近似,所得公式对衍射距离大于数倍入射波长的衍射空间都是有效的.计算并分析了这种孔径轴线上的光强分布情况.结果显示,它的最大调制深度是入射光强的16倍,比圆形孔径或环形孔径大4倍,近场的光学层析能力比远场的强.在很近场区,二元环形孔径的在轴光强分布对孔径结构比较敏感,这些特性使这种孔径在光子学和光纤光学的应用方面具有潜在的价值.

     

    Abstract: A formula of the axial irradiance distribution of a binary annular aperture is derived in detail by using the Rayleigh-Sommerfeld diffraction integral that is valid to a few wavelengths of the aperture. We calculated and analyzed the axial irradiance distribution throughout the whole space behind the binary annular aperture. The results show that its maximum depth of modulation of the oscillation is sixteen times the incident irradiance and four times that of the circular or annular aperture,and that the optical sectioning strength in the near field is better than in the Fresnel region.In the very near field, the axial irradiance distribution has a variety of subtle effects as changing its aperture parameters. These are of potential interest in photonics and fiber-optics application.

     

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