Terahertz Portable Handheld Spectral Reflection (PHASR) Scanner.

Terahertz Portable Handheld Spectral Reflection (PHASR) Scanner.
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DOI:
10.1109/access.2020.3045460
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发表时间:
2020
期刊:
影响因子:
3.9
通讯作者:
Arbab, M. Hassan
Arbab, M. Hassan
中科院分区:
计算机科学3区
文献类型:
--
作者:
Harris, Zachery B.;Khani, Mahmoud E.;Arbab, M. Hassan

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We report on the development and characterization of a handheld terahertz (THz) time-domain spectroscopic scanner for broadband imaging between approximately 0.25 and 1.25 THz. We designed and fabricated a 3D-printed fiber-coupled housing which provides an alignment-free strategy for the placement and operation of the THz optics. Image formation is achieved through telecentric beam steering over a planar surface through a custom f-θ scanning lens. This design achieves a consistent resolution over the full 12 × 19 mm field of view. Broadband spectral imaging is demonstrated using a 1951 United States Air Force Resolution Test Target. The consistency of the resolution over the wide field is validated through Boehler Star resolution measurements. Finally, a practical scenario of subsurface imaging on a damaged section of an aircraft wing is demonstrated. The THz PHASR is a field-deployable imaging system with the versatility to be applied to a much broader range of targets and imaging scenarios than previously possible, from industrial non-destructive testing to clinical diagnostic imaging.
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