A modified fractal zone plate (FZP) with the character of extending the focal depth is proposed.
提出了一种具有增大焦深特性的改进型分形波带片(fzp)。
The results indicate that flat-top beam shaping and single-circle beam shaping at the focal plane can all be realized by using three-zone annular phase pupil filters.
模拟结果表明，利用三环相位光瞳滤波器，不仅可以在焦面上实现光强的平顶分布，而且还可以得到单环衍射光束。
We built a seismotectonic model for the west part of this zone from data of geological profiles, deep crust seismic detection and earthquake focal mechanisms in this paper.
文中通过地质构造剖面、深部探测资料和地震震源机制解资料，综合研究了该区的地震构造模型。
Earthquake location and detection by waveform cross correlation, focal mechanism. Crustal fault zone structure imaging. Numerical modeling on earthquake ruptures and faulting.
地震定位与波形方法检测，地震震源机制，断层活动数值模拟，地壳断层结构与地球内部结构。
Earthquake location and detection by waveform cross correlation, focal mechanism. Crustal fault zone structure imaging. Numerical modeling on earthquake ruptures and faulting.
地震定位与波形方法检测，地震震源机制，断层活动数值模拟，地壳断层结构与地球内部结构。
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