- Forfatter
- Sørgård, Trygve
- van Rheenen, Arthur
- Haakestad, Magnus W.
- Publisert
- 2016
- Emneord
- Komposittmaterialer
- Terahertz
- Laserspektroskopi
- Permalenke
- http://hdl.handle.net/20.500.12242/596
- https://ffi-publikasjoner.archive.knowledgearc.net/handle/20.500.12242/596
- DOI
- 10.1117/12.2217726
- Samling
- Articles
- Description
- Sørgård, Trygve; van Rheenen, Arthur; Haakestad, Magnus W.. Terahertz imaging of composite materials in reflection and transmission mode with a time-domain spectroscopy system. Proceedings of SPIE, the International Society for Optical Engineering 2016 ;Volum 9747.
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- 1419441.pdf
- Size: 740k
- Sammendrag
- A fiber-coupled Terahertz time domain spectroscopy (THz-TDS) system based on photoconductive antennas, pumped by a 100-fs fiber laser, has been used to characterize materials in transmission and reflection mode. THz images are acquired by mounting the samples under investigation on an x-y stage, which is stepped through the beam while the transmitted or reflected THz waveform is captured. The samples include a carbon fiber epoxy composite and a sandwich-structured composite panel with an aramid fiber honeycomb core in between two skin layers of fiberglass reinforced plastic. The former has an artificially induced void, and from a comparison of recorded reflected time-domain signals, with and without the void, a simple model for the structure of the composite is proposed that describes the time-domain signals reasonably well. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.