Vibration Amplitude Distribution Measurement Using Phase of Recontructed Wave in Time-average Digital Holography

Xiaofan, 钱晓凡 Qian; Zhan-liang, 王占亮 Wang; Haitao, 张海涛 Zhang; Hong, 陈虹 Chen

doi:10.3788/gzxb20103903.0523

Cited by 2 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…, if wavefield component of reconstructed object wave is only considered; the reconstructed wavefield is [3] :…”

Section: The Principle Of Time-average Digital Holography For Vibratimentioning

confidence: 99%

“…It is to do interference between the measured wavefront and its own transformed wavefront. Reference [3] has researched the characteristics of time average holographic reconstructed wavefield phase and we can know that there are only two values (0, π) for the phase of the first kind of zero-order Bessel function: phase is 0 in the interval from the value 1of Bessel function to the first zero point (level 1), phase is π in the interval from the first zero point to the second zero point (level 2), phase becomes to 0 in the interval from the second zero point to the third zero point (level 3), and so on. Obviously, if the reconstructed wavefield can be conducted with shearing interferometry, these phase jump locations can be easily found so the detection of amplitude distribution can also be completed quickly.…”

Section: Introductionmentioning

confidence: 99%

“…There are mainly two kinds of vibration measurement which based on time-average digital holography: the vibration measurement of intensity and phase, which based on the reconstructed image and the reconstructed wave field [3] . Through comparing the above two methods we can know that due to the influence of speckle and other noises, no desired result can be after obtained by the former, and although the latter works better it takes a longer time on machine because phase unwrapping operation is needed to be completed.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Vibration measurement based on time-average digital holography and the shearing interferometry

2011

View full text Add to dashboard Cite

The detection of amplitude distribution of the conventional time average holography is realized through the reconstructed image intensity, however, no satisfactory results can be often obtained because there are many noise influences such as speckle noise. As there are only two values for the phase of the first kind of zero-order Bessel function, namely 0 and π, we can determine the amplitude distribution through the reconstructed field phase. And this method is better than the conventional, but it takes a longer time. This paper presents a new method that through introducing the shearing principle to vibration measurement of time average digital holograph, we can detect the amplitude distribution rapidly by directly using the shearing interferogram to find out the phase stepping region, and this method need no phase unwrapping operation. Simulation computation and experiment results show that the time new method need for vibration measurement is shorter than that of reconstructed field phase, and the measurement effect is better than that of reconstructed image intensity.

show abstract

“…, if wavefield component of reconstructed object wave is only considered; the reconstructed wavefield is [3] :…”

Section: The Principle Of Time-average Digital Holography For Vibratimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vibration measurement based on time-average digital holography and the shearing interferometry

2011

View full text Add to dashboard Cite

show abstract

“…Then the phase information of the reconstructed object light field when the component is with load can be written as: As a result, the phase differences can be got as: 1 2…”

Section: Introductionmentioning

confidence: 99%

A New Algorithm for Holographic Interferometry

Zhang¹,

Zhang²,

Wang³

2012

2012 Symposium on Photonics and Optoelectronics

View full text Add to dashboard Cite

As there are many noise influences such as speckle noise in the reconstructed object light field, how to obtain a high quality wrapped phase image is one of the most important part in holographic interferometry. The principle of holographic interferometry is introduced and a new algorithm for holographic interferometry is put forward. And it is also verified by experiments. The experiment result shows that the new algorithm is not only simpler than the traditional algorithm but also can obtain a higher quality wrapped phase image with less noise. It is convenient for the subsequent phase-unwrapping work.

show abstract

Vibration Amplitude Distribution Measurement Using Phase of Recontructed Wave in Time-average Digital Holography

Cited by 2 publications

References 0 publications

Vibration measurement based on time-average digital holography and the shearing interferometry

Vibration measurement based on time-average digital holography and the shearing interferometry

A New Algorithm for Holographic Interferometry

Contact Info

Product

Resources

About