LASER BEAM SHUT-OFF DEVICE

• Main Authors: IMAI HISASHI, UNO TETSUO, SATO MITSUHIRO, KIKAWADA KAZUYA, YAMADA ATSUO, MINEHARA EISUKE
• Format: Patent
• Language: English; Japanese
• Published: 04.01.2022
• Subjects: BUILDING; BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; FIXED CONSTRUCTIONS; FORMS; HANDLING BUILDING MATERIALS ON THE SITE; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS; SCAFFOLDING; SHUTTERING; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

To provide a laser beam shut-off device comprising a lightweight, compact and inexpensive material constitution.SOLUTION: A laser beam shut-off device comprises: a fluorocarbon resin plate 13 reducing a power area density by dispersing and scattering an irradiated laser beam L inside at the position separate from a cut-off member 1 by a prescribed distance to attenuate or block the laser beam L penetrating the cut-off part of the member 1 at rearward in a travel direction when cutting the cut-off member 1 comprising the composite structure of a concrete 2 and steel material 3 by radiating the laser beam L; and a steel panel 14 or a bentonite slurry tank for attenuating or blocking the progress of a passage light Lp to a rear side by further scattering the passage light Lp passing through the fluorocarbon resin plate 13.SELECTED DRAWING: Figure 2 【課題】 軽量、コンパクトで低廉な材料構成からなるレーザー光遮断装置を提供する。【解決手段】 レーザー光Ｌを照射させてコンクリート２、鋼材３の複合構造からなる切断部材１を切断する際に、切断部材１の切断部を貫通したレーザー光Ｌを、その進行方向の後方で減衰、遮断するように、切断部材１から所定距離離れた位置に、照射されたレーザー光Ｌを内部で拡散、散乱させてパワー面密度を低下させるフッ素樹脂板１３と、フッ素樹脂板１３を通過した通過光Ｌｐをさらに散乱させて、通過光Ｌｐの後方への進行を減衰、遮断する鋼製パネル１４あるいベントナイト懸濁液槽を備えるようにした。【選択図】 図２