Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of the Optical Society of Korea
  • Vol. 17,
  • Issue 1,
  • pp. 50-56
  • (2013)

Optical-fiber Electronic Speckle Pattern Interferometry for Quantitative Measurement of Defects on Aluminum Liners in Composite Pressure Vessels

Open Access Open Access


Optical-fiber electronic speckle pattern interferometry (ESPI) is a non-contact, non-destructive examination technique with the advantages of rapid measurement, high accuracy, and full-field measurement. The optical-fiber ESPI system used in this study was compact and portable with the advantages of easy set-up and signal acquisition. By suitably configuring the optical-fiber ESPI system, producing an image signal in a charge-coupled device camera, and periodically modulating beam phases, we obtained phase information from the speckle pattern using a four-step phase shifting algorithm. Moreover, we compared the actual defect size with that of interference fringes which appeared on a screen after calculating the pixel value according to the distance between the object and the CCD camera. Conventional methods of measuring defects are time-consuming and resource-intensive because the estimated values are relative. However, our simple method could quantitatively estimate the defect length by carrying out numerical analysis for obtaining values on the X-axis in a line profile. The results showed reliable values for average error rates and a decrease in the error rate with increasing defect length or pressure.

© 2013 Optical Society of Korea

PDF Article
More Like This
Fiber electronic speckle pattern interferometry and its applications in residual stress measurements

Jingbo Zhang and Tow Chong Chong
Appl. Opt. 37(28) 6707-6715 (1998)

Vibration measurement by the time-averaged electronic speckle pattern interferometry methods

Wei-Chung Wang, Chi-Hung Hwang, and Shu-Yu Lin
Appl. Opt. 35(22) 4502-4509 (1996)

Multiplicative electronic speckle-pattern interferometry fringes

Noe Alcalá Ochoa, Fernando Mendoza Santoyo, Carlos Pérez López, and Bernardino Barrientos
Appl. Opt. 39(28) 5138-5141 (2000)

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.

Select as filters

Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved