Digital speckle pattern interferometry as a holographic velocimetry technique
Digital speckle pattern interferometry as a holographic velocimetry technique
复制标题
数字散斑干涉测量作为全息测速技术
DOI：
10.1088/0957-0233/15/4/015
复制
发表时间：
2004
影响因子：
2.4
通讯作者：
M. P. Arroyo
中科院分区：
文献类型：
--
作者：
J. Lobera;N. Andres;M. P. Arroyo
本文介绍了数字散斑干涉技术(DSPI)作为一种数字像面全息(DPH)技术，并讨论了它在流体速度测量中的潜力。记录是用空间相移(SPS)DSPI设置进行的，这也可以被视为离轴DPH设置。对于只有一个照明平面的装置，给出了采用傅里叶变换方法的SPS-DSPI分析和DPH分析的理论研究。从DIPH分析中，推断了一种扩展SPS-DSPI装置以同时记录但独立重建多个流体面的方法。对流试验的一些初步结果表明了准三维记录的可行性。
In this paper digital speckle pattern interferometry (DSPI) as a digital image plane holography (DIPH) technique is presented and its potential for fluid velocimetry are discussed. The recording is carried out with a spatial phase shifting (SPS) DSPI set-up, which can also be viewed as an off-axis DIPH set-up. A theoretical study of both SPS–DSPI analysis using a Fourier transform method and DIPH analysis is presented for a set-up with only one illuminated plane. From the DIPH analysis, a way to extend the SPS–DSPI set-up to simultaneously record but independently reconstruct several fluid planes is inferred. Some preliminary results from a convective flow illustrate the feasibility of the quasi 3D recording.