Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11030360 | Food Control | 2019 | 27 Pages |
Abstract
A subwavelength transmission imaging system based on Bessel-Gauss beam focusing in the 140â¯GHz frequency band (λâ¯=â¯2.14â¯mm) was constructed for food quality inspection purposes. The system employed a low-cost beam source for imaging via mechanical raster scanning, and the high resolution (0.75 λ) focusing module had an extended depth of focus (12.6 λ) and supported a large scan area (800â¯Ãâ¯400â¯mm2, 30â¯min scan time). The performance of the proof-of-concept system was nondestructively investigated by using a variety of food products, such as chocolate bars, dried laver, red ginseng, and walnuts.
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Authors
Gyeongsik Ok, Hee Jun Shin, Min-Cheol Lim, Sung-Wook Choi,