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Study of Pulsed-Laser Drilling Process Using Transparent Materials: Time-Resolved Observation in Drilled Holes

Research Project

Project/Area Number 11650736
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Material processing/treatments
Research InstitutionNagaoka University of Technology

Principal Investigator

ITO Yoshiro  Nagaoka University of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (60176378)

Co-Investigator(Kenkyū-buntansha) NAKAMURA Susumu  Nagaoka College of Technology, Department of Electric Engineering, Associate Professor, 電気科, 助教授 (10217854)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2000: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1999: ¥1,900,000 (Direct Cost: ¥1,900,000)
Keywordslaser / ablation / surface phenomena / transparent materials / laser machining / laser marking / time-resolved observation / imaging / 穴あけ / レーザー誘起プラズマ / 時間分解観察
Research Abstract

When we focus high power laser pulses on a surface or in inside of transparent materials, non-linear absorption of the laser radiation occurs and some laser-induced damages are introduced. This process is used in laser marking of transparent materials. We have made dynamical observations of the process by the stroboscopic imaging system which has a few nanoseconds time resolution. Output of fundamental radiation (1064nm) from a Q-switched Nd:YAG laser was focused at the surface or inside of PMMA blocks. Second harmonic radiation (532nm) form the same laser was used as illuminating light and images were taken by a CCD camera with a band-pass filter of 532 nm. Series of images were taken at different intervals between fundamental and second harmonic light, which was controlled by optical delay line. In observation at longer interval than 50ns, another laser was used as illuminating source. Damages occur at several points simultaneously and propagation of shock waves started from these points is clearly observed. Laser induced damages (cracks) continue to develop until some microseconds after laser pulse. Effects of pulse energy and roughness of the target surface are studied.

Report

(3 results)
  • 2001 Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (38 results)

All Other

All Publications (38 results)

  • [Publications] M.Takata: "An attempt at determination of calcium in ice by laser induced breakdown spectroscopy"Bulletin of Glacier Research,. 17. 37-42 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] N.Mohri: "A new process of additive and removal machining by EDM with a thin electrode"Annals of the CIRP. 49(1). 123-126 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Nakamura: "Detection technique for transition between deep penetration mode and shallow penetration mode in CO_2 laser welding of metals"J. Phys. D: Appl. Phys.. 33. 2941-2948 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y.Ito: "Effects of repetitive irradiation in laser ablation of aluminum in gases observed by photoacoustic and imaging techniques"Proceedings of LPM 2000, Proc. of SPIE. 4088. 94-97 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Kiyoku: "Effects of laser pulse shape on jet-like plasma formation in laser ablation of metals under atmosphere at high fluence : Observation by nanosecond imaging technique"Proceedings of LPM 2000, Proc. of SPIE. 4088. 102-105 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ito, Y.: "Effects of pulse numbers in laser ablation of metals observed by photoacoustic and imaging technique"Proceedings of ICALEO 2000, LIA. 87,Part2,Sec.E. 242-251 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ito, Y.: "Nanosecond laser ablation of metals in gases observed by photoacoustic and imaging techniques,"Proceedings of High Power Laser Ablation 2000. Proc, of SPIE,. 4065. 461-469 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 武沢 英樹: "細線電極を用いた放電加工における極間現象"電気加工学会全国大会(2000)講演論文集. 57-58 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 清久 悟: "透明試料のパルスレーザー加工過程の時間分解観察(第1報)"2001年度精密工学会春季大会学術講演会講演論文集. 115 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 武沢 英樹: "単発放電による微細電極の成形メカニズム第2報-電極形状の時間追跡-"2001年度精密工学会春季大会学術講演会講演論文集. 257 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] レーザ熱加工研究会WG:レーザによる精密・微細加工の現状と将来技術編: "「レーザによる精密・微細加工の現状と将来技術」"レーザ熱加工研究会. 289 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Naotake Mohri, Hideki Takezawa, Katsushi Furutani, Yoshiro Ito, Toshio Sata: "A new process of additive and removal machining by EDM with a thin electrode"Annals of the CIRP. 49 (1). 123-126 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Susumu Nakamura, Masaya Sakurai, Kenichi Kamimuki, Takashi Inoue and Yoshiro Ito: "Detection technique for transition between deep penetration mode and shallow penetration mode in CO_2 laser welding of metals"J. Phys. D: Appl. Phys.. 33. 2941-2948 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yoshiro Ito, Satoshi Sato, Yoshinori Horiyama, Nobuhiko Azuma, Kumiko Goto-Azuma, Masao Higashiura: "Determination of Sodium in Artificial Ice Samples by Laser Ablation/Laser Induced Fluorescence Technique"Analy. Sci.. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y. Ito, T. Shimizu, I. Oguro and S. Kijima: "Jet-like plasma formation in laser ablation of metals observed by nanosecond imaging technique in gases"Proceedings of ICALEO'99. LIA Vol. 87, Part 2, Sec. E. 61-70 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S. Nakamura, M. Sakurai, Y. Ito. K. Kamimuki and T. Inoue: "Detection of transition from key-hole type to heat conduction type welding in CO_2 laser welding of metals"Proceedings of ICALEO'99. LIA Vol. 87, Part 2, Sec. E. 28-33 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y. Ito, I. Oguro, Y. Fukuzawa, and S. Nakamura: "Nanosecond laser ablation of metals in gases observed by photoacoustic and imaging techniques"Proceedings of High Power Laser Ablation 2000, Proc. of SPIE. 4065. 461-469 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y. Ito, I. Oguro, and S. Nakamura: "Effects of repetitive irradiation in laser ablation of aluminum in gases observed by photoacoustic and imaging techniques"Proceedings of LPM 2000, Proc. of SPIE. 4088. 94-97 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S. Kiyoku, Y. Kurosaki, I. Oguro, S. Nakamura, and Y. Ito: "Effects of laser pulse shape on jet-like plasma formation in laser ablation of metals under atmosphere at high fluence: Observation by nanosecond imaging technique"Proceedings of LPM 2000, Proc. of SPIE. 4088. 102-105 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ito, Y., Oguro, I., Kiyoku, S., and Nakamura, S.: "Effects of pulse numbers in laser ablation of metals observed by photoacoustic and imaging technique"Proceedings of ICALEO 2000. LIA Vol. 87, Part 2, Sec. E. 242-251 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Takezawa, Y. Ito, N. Mohri: "The behavior of thin electrode wear in electrical discharge machining"Proceedings of the 13th international Symposium for Electromachining. ISEM XIII, (Vol. II). 727-725 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y. Ito, S. Kiyoku, T. Ogura and N. Mohri: "Dynamical observation of laser-induced damages made in inside of transparent materials"Proceedings of LPM 2001, Proc. of SPIE. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] M.Takata,: "An attempt at determination of calcium in ice by laser induced breakdown spectroscopy"Bulletin of Glacier Research,. 17. 37-42 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] N.Mohri,: "A new process of additive and removal machining by EDM with a thin electrode"Annals of the CIRP. 49(1). 123-126 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Nakamura: "Detection technique for transition between deep penetration mode and shallow penetration mode in CO_2 laser welding of metals"J.Phys.D : Appl.Phys.. 33,. 2941-2948 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Ito: "Effects of repetitive irradiation in laser ablation of aluminum in gases observed by photoacoustic and imaging techniques"Proceedings of LPM 2000,Proc.of SPIE. 4088,. 94-97 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Kiyoku: "Effects of laser pulse shape on jet-like plasma formation in laser ablation of metals under atmosphere at high fluence : Observation by nanosecond imaging technique."Proceedings of LPM 2000, Proc.of SPIE. 4088,. 102-105 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Ito,Y.: "Effects of pulse numbers in laser ablation of metals observed by photoacoustic and imaging technique."Proceedings of ICALEO 2000, LIA. 87,Part 2,Sec.E. 242-251 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Ito,Y.: "Nanosecond laser ablation of metals in gases observed by photoacoustic and imaging techniques,"Proceedings of High Power Laser Ablation 2000, Proc.of SPIE,. 4065,. 461-469 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 武沢英樹: "細線電極を用いた放電加工における極間現象"電気加工学会全国大会(2000)講演論文集. 57-58 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 清久悟: "透明試料のパルスレーザー加工過程の時間分解観察(第1報)"2001年度精密工学会春季大会学術講演会講演論文集. 115 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 武沢英樹: "単発放電による微細電極あ成形メカニズム 第2報 -電極形状の時間追跡-"2001年度精密工学会春季大会学術講演会講演論文集. 257 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] レーザ熱加工研究会WG:レーザによる精密・微細加工の現状と将来技術 編: "レーザによる精密・微細加工の現状と将来技術"レーザ熱加工研究会. 289 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Ito: "Jet-like Plasma Formation in Laser Ablation of Metals Observed by Nanosecond Imaging Technique in Gases"Proceedings of ICALEO '99. LIA(印刷中). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Y.ITO: "Nanosecond laser ablation of metals in gases observed by photoacoustic and imaging techniques"Proceedings of SPIE, High-Power Laser Ablation III. 4065(発表予定). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 小黒 勇: "レーザーアブレーション現象におけるパルス数の影響"1999年度精密工学会秋季大会学術講演会講演論文集. 466 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 伊藤 義郎: "アルミのレーザーアブレーション-ナノ秒レーザーを用いた高速イメージングによる検討"電気加工学会全国大会(1999)講演論文集. 111-114 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 清久 悟志: "レーザーアブレーションにより発生したジェット状プラズマのナノ秒イメージング -レーザーパルス波形の影響-"日本機械学会北陸信越支部第37期総会・講演会講演論文集. 007-1. 249-250 (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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