Recording caustic images by phase-shifting digital holography

Kenichi Sakaue, Shinichi Suzuki, Masahisa Takashi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Phase-shifting digital holography is applied to record the caustics of a stationary crack at arbitrary distances. The stress intensity factors of the crack are measured from the reconstructed images of the caustics. The measurement results show that the stress intensity factors are almost constant in the region where the initial curve radius, i.e., distance from the crack tip, is greater than half the specimen thickness. In addition, the stress intensity factors decrease in a three-dimensional stress field. These results correspond to those by Rosakis and Ravi-Chandar. This confirms that this method is applicable to measure the stress intensity factor of cracks.

Original languageEnglish
Article number115802
JournalOptical Engineering
Issue number11
Publication statusPublished - 2006 Nov
Externally publishedYes


  • Caustic method
  • Fracture mechanics
  • Phase-shifting digital holography
  • Stress intensity factor

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)


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