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ID 114124
Author
Minamiji, Fui Tokushima University
Oe, Ryo JST|Tokushima University
Koresawa, hidenori JST|Tokushima University
Yamamoto, Hirotsugu Tokushima University|JST|Utsunomiya University KAKEN Search Researchers
Content Type
Journal Article
Description
We construct a full-field phase-shifting terahertz digital holography (PS-THz-DH) system by use of a THz quantum cascade laser and an uncooled, 2D micro-bolometer array. The PS-THz-DH enables us to separate the necessary diffraction-order image from unnecessary diffraction-order images without the need for spatial Fourier filtering, leading to suppress the decrease of spatial resolution. 3D shape of a visibly opaque object is visualized with a sub-millimeter lateral resolution and a sub-μm axial resolution. Also, the digital focusing of amplitude image enables the visualization of internal structure with the millimeter-order axial selectivity. Furthermore, the internal stress distribution of an externally compressed object is visualized from the phase image. The demonstrated results imply a possibility for non-destructive inspection of visibly opaque non-metal materials.
Journal Title
Optics Express
ISSN
10944087
Publisher
OSA publishing
Volume
27
Issue
23
Start Page
33854
End Page
33868
Published Date
2019-11-05
Rights
© 2019 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.
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DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Publisher
departments
Institute of Post-LED Photonics
Science and Technology