Investigation of microcracks in wood with laser speckle intensity

Paul Wahl, Antti Hanhijärvi, Raimo Silvennoinen

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)


Microcracking of wood caused by drying was investigated by detecting the intensity variations of a speckle pattern induced by a focused laser beam scattered from the surface. Two trials were carried out to test the usefulness of this method. The trials were used to compare the severity of different drying treatments and to follow the development of cracking during drying. The data gathered from these experiments revealed clear correlation between the amount of cracking on a wood surface and severity of the drying treatment. Furthermore, an increase in the amount of cracks was observed as drying proceeds.
Original languageEnglish
Pages (from-to)788-792
JournalOptical Engineering
Issue number5
Publication statusPublished - 2001
MoE publication typeA1 Journal article-refereed


  • laser speckle
  • microcracks
  • damage in dried wood
  • optical metrology


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