title: High-performance sub-terahertz transmission imaging system for food inspection.
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.
authors.affiliation: Food Safety Research Group, Korea Food Research Institute, Backhyun 516, Sungnam, Gyeonggi-do 463-746, South Korea.
authors.forename: Gyeongsik
authors.initials: G
authors.lastname: Ok
authors.affiliation: Food Safety Research Group, Korea Food Research Institute, Backhyun 516, Sungnam, Gyeonggi-do 463-746, South Korea.
authors.forename: Kisang
authors.initials: K
authors.lastname: Park
authors.affiliation: School of Food Science and Technology, Chung-Ang University, Anseong 456-756, South Korea.
authors.forename: Hyang Sook
authors.initials: HS
authors.lastname: Chun
authors.affiliation: Food Safety Research Group, Korea Food Research Institute, Backhyun 516, Sungnam, Gyeonggi-do 463-746, South Korea.
authors.forename: Hyun-Joo
authors.initials: HJ
authors.lastname: Chang
authors.affiliation: Food Safety Research Group, Korea Food Research Institute, Backhyun 516, Sungnam, Gyeonggi-do 463-746, South Korea.
authors.forename: Nari
authors.initials: N
authors.lastname: Lee
authors.affiliation: Food Safety Research Group, Korea Food Research Institute, Backhyun 516, Sungnam, Gyeonggi-do 463-746, South Korea.
authors.forename: Sung-Wook
authors.initials: SW
authors.lastname: Choi
keywords: (110.6795) Terahertz imaging; (120.4290) Nondestructive testing