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Holographic 3‐D laser imaging into sandstone
Author(s) -
Yu P.,
Mustata M.,
Chen D.,
PyrakNolte L. J.,
Nolte D. D.
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl015108
Subject(s) - holography , microscale chemistry , microscopy , optics , geology , laser , scanning electron microscope , tomographic reconstruction , digital holographic microscopy , materials science , resolution (logic) , tomography , mineralogy , artificial intelligence , physics , mathematics education , mathematics , computer science
With a novel imaging technique that uses holographic recording and reconstruction to perform laser‐ranging into translucent media, we have imaged several grain layers into a sandstone sample. Three‐dimensional microscale (10 micron lateral and 30 micron depth resolution) information on grain size and geometry was obtained as deep as 400 microns into the sample without thin‐sectioning. Surficial grain features in the holographic reconstruction were associated with features observed using conventional optical and scanning electron microscopy. This imaging technique represents a new form of nondestructive evaluation of grain and pore structure in reservoir rock by acquiring full‐field images at variable depths, unlike sequential scanning microscopy that requires tomographic reconstruction.