PROBLEM TO BE SOLVED: To reliably remove a foreign substance from a dried seaweed sheet by using laser light to promote automation and saving of labor for removing the foreign substance from the dried seaweed sheet.SOLUTION: A laser apparatus for removing a foreign substance from a dried seaweed sheet includes: a foreign substance detection device being provided with an internal foreign substance detection unit 6, 7 configured to detect an internal foreign substance existing inside the dried seaweed sheet, an upper surface foreign substance detection unit 8, 9 configured to detect an upper surface foreign substance adhered to an upper surface of the dried seaweed sheet, and a lower surface foreign substance detection unit 10, 11 configured to detect a lower surface foreign substance adhered to a lower surface of the dried seaweed sheet a laser irradiation device 4 configured to irradiate a detected foreign substance being detected by the foreign substance detection device with laser light to remove the foreign substance a foreign substance information calculating device 12 configured to calculate information of the foreign substance in terms of positions and sizes of the detected foreign substance and a movement control device 13 configured to control movement of the laser irradiation device 4 to move to a position from which a laser is irradiated, which are disposed along a feed conveyor 2a, 2b configured to feed the dried seaweed sheet containing the foreign substance.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】板海苔の異物の除去の自動化省力化を図るため、レーザー光線を活用して板海苔から異物を確実に除去する。【解決手段】異物を含む板海苔を搬送する搬送コンベヤ2a,2bに沿って板海苔の内部にある内部異物を検出する内部異物検出装置6,7、板海苔の上面に付着している上面異物を検出する上面異物検出装置8,9、板海苔の下面に付着している下面異物を検出する下面異物検出装置10,11を有する異物検出装置、異物検出装置に続いて異物検出装置で検出された異物に向かってレーザー光線を照射して異物を除去するレーザー照射装置4、検出された異物の位置及び大きさの異物情報を演算する異物情報演算装置12、異物情報に基づいてレーザー照射装置4をレーザーの照射位置へ送るための送りを制御する送り制御装置13を備えた板海苔の異物除去用レーザー装置。【選択図】図1
