Open AccessHigh-performance sub-terahertz transmission imaging system for food inspection
Author(s) -
Gyeongsik Ok,
Kisang Park,
Hyang Sook Chun,
HyunJoo Chang,
Nari Lee,
SungWook Choi
Publication year - 2015
Publication title -
biomedical optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.362
H-Index - 86
ISSN - 2156-7085
DOI - 10.1364/boe.6.001929
Subject(s) - terahertz radiation , optics , beam (structure) , transmission (telecommunications) , materials science , image processing , lens (geology) , physics , computer science , artificial intelligence , telecommunications , image (mathematics)
Unlike X-ray systems, a terahertz imaging system can distinguish low-density materials in a food matrix. For applying this technique to food inspection, imaging resolution and acquisition speed ought to be simultaneously enhanced. Therefore, we have developed the first continuous-wave sub-terahertz transmission imaging system with a polygonal mirror. Using an f-theta lens and a polygonal mirror, beam scanning is performed over a range of 150 mm. For obtaining transmission images, the line-beam is incorporated with sample translation. The imaging system demonstrates that a pattern with 2.83 mm line-width at 210 GHz can be identified with a scanning speed of 80 mm/s.