Abstract-High-speed terahertz imaging toward food quality inspection

                         Gyeongsik Ok, Kisang Park, Hyun Jung Kim, Hyang Sook , and Sung-Wook Choi

received 12/06/2013; accepted 01/27/2014; posted 01/28/2014; Doc. ID 202672

http://www.opticsinfobase.org/ao/upcoming_pdf.cfm?id=202672

In contrast to conventional X-ray food inspection systems that have difficulty detecting low-density materials, a terahertz (THz) imaging system can even identify insects and plastics embedded in a food matrix. A reflection mode continuous-wave THz imaging system was therefore developed for application in food quality inspection, which requires fast, compact, and low-cost detection. High-speed operation of the THz imaging system was achieved through the use of a beam-steering tool. A reasonable compromise between the spatial resolution and the scan length of an aspheric f-theta scanning lens could be achieved by optimizing the lens parameters.