High-performance sub-terahertz transmission imaging system for food inspection
- Authors
- Ok, Gyeongsik; Park, Kisang; Chun, Hyang Sook; Chang, Hyun-Joo; Lee, Nari; Choi, Sung-Wook
- Issue Date
- May-2015
- Publisher
- OPTICAL SOC AMER
- Citation
- BIOMEDICAL OPTICS EXPRESS, v.6, no.5, pp 1929 - 1941
- Pages
- 13
- Journal Title
- BIOMEDICAL OPTICS EXPRESS
- Volume
- 6
- Number
- 5
- Start Page
- 1929
- End Page
- 1941
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/9578
- DOI
- 10.1364/BOE.6.001929
- ISSN
- 2156-7085
- Abstract
- 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. (C) 2015 Optical Society of America
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