Share Email Print
cover

Proceedings Paper

Vibration measurement based on time-average digital holography and the shearing interferometry
Author(s): Fan Rao; Xiao-fan Qian; Zu-jie Peng
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

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 μ, 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.

Paper Details

Date Published: 20 August 2011
PDF: 7 pages
Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81920L (20 August 2011); doi: 10.1117/12.898563
Show Author Affiliations
Fan Rao, Kunming Univ. of Science and Technology (China)
Xiao-fan Qian, Kunming Univ. of Science and Technology (China)
Zu-jie Peng, Kunming Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 8192:
International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging
Farzin Amzajerdian; Weibiao Chen; Chunqing Gao; Tianyu Xie, Editor(s)

© SPIE. Terms of Use
Back to Top