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arXiv 1407.4758physics.optics
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瞬态声场光学成像的相衬法

Optical imaging of transient acoustic fields using a phase contrast method

G. T. Clement, S. V. Letcher

摘要:

本文设计了一种相干相衬光学系统,并对该系统进行了实验测试。该系统类似于脉冲,中央阶纹影法,但使用傅立叶滤波技术,图像的实际声压场,其中前一种技术重建的字段的绝对值。使用单周期正弦波声脉冲对系统进行模拟。给出了宽带高斯脉冲输入水下压电陶瓷换能器阵列的实验图像。在源激励后的一系列时间内,在空间上重建相对压力场。讨论了相衬系统的原理和局限性。

英文摘要:

A coherent phase-contrast optical system has been designed and tested for tomographic imaging of pressure fields from experimental transient acoustic signals. The system is similar to the pulsed, central-order schlieren method, but uses a Fourier filtering technique that images the actual acoustic pressure field, where the former technique reconstructs only the absolute value of the field. Simulations of the system are performed using a single-cycle sine-wave acoustic pulse. Experimental images resulting from a broad-band Gaussian pulse input to an underwater piezoceramic transducer array are presented. Relative pressure field s are reconstructed in space over a series of times after the source excitation. Theory and limitations of the phase contrast system are discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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