JP6934083B1 - レーザ加工装置及びレーザ加工方法 - Google Patents
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- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- B23K2103/00—Materials to be soldered, welded or cut
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Abstract
Description
Claims (16)
- レーザ光源から出力されたレーザ光を入力し、二次元配列された複数の画素それぞれにおいて前記レーザ光の位相を変調するホログラムを呈示して、前記ホログラムにより位相変調した後のレーザ光を出力する空間光変調器と、
前記空間光変調器の後段に設けられた集光光学系と、
前記空間光変調器から出力された位相変調後の前記レーザ光を前記集光光学系により被加工物の複数の照射点に集光させるホログラムを前記空間光変調器に呈示させる制御部と、
を備え、
前記制御部は、前記被加工物に照射される位相変調後の前記レーザ光の光軸と交差する第1の面内において前記複数の照射点により画成される被加工領域と、前記光軸と交差し前記第1の面から前記光軸の方向に離れている第2の面内において前記複数の照射点により画成される被加工領域との、形状及び大きさのうち少なくとも一方を互いに異ならせる、レーザ加工装置。 - 前記被加工物が位相変調後の前記レーザ光に対して光透過性を有し、
前記第1及び第2の面のうち前記被加工物の光照射表面からの距離が遠い一方の面における前記被加工領域の面積が、他方の面における前記被加工領域の面積よりも大きい、請求項1に記載のレーザ加工装置。 - 前記制御部は、前記被加工領域の形状及び大きさのうち少なくとも一方を、前記光軸の方向において連続的に変化させる、請求項1又は2に記載のレーザ加工装置。
- 前記制御部は、前記第1及び第2の面のそれぞれにおいて、前記被加工領域を画定する仮想線に沿って各照射点の位置を変更する複数のホログラムを前記空間光変調器に順次呈示させる、請求項1〜3のいずれか1項に記載のレーザ加工装置。
- 観察光を前記被加工物に照射する観察用光源と、
前記被加工物において反射した前記観察光を検出する光検出器と、
を更に備え、
前記制御部は、前記光検出器による検出結果に基づいて各照射点における加工状態を判断し、前記第1及び第2の面に対するホログラムの呈示時間を前記加工状態に応じて制御する、請求項1〜4のいずれか1項に記載のレーザ加工装置。 - 前記制御部は、各面内において前記複数の照射点に含まれる少なくとも2つの前記照射点の光強度を互いに独立して制御する、請求項1〜5のいずれか1項に記載のレーザ加工装置。
- 前記制御部は、前記第1の面内における前記複数の照射点の光強度と、前記第2の面内における前記複数の照射点の光強度とを互いに独立して制御する、請求項1〜6のいずれか1項に記載のレーザ加工装置。
- 前記制御部は、ホログラムを変更する際に、或るホログラムを消去してから別のホログラムを呈示するまでの間、前記レーザ光の光強度を前記被加工物のいずれの部位においても加工閾値未満とするホログラムを前記空間光変調器に呈示させる、請求項1〜7のいずれか1項に記載のレーザ加工装置。
- 二次元配列された複数の画素それぞれにおいて光の位相を変調するホログラムを空間光変調器に呈示させる制御ステップと、
レーザ光源から出力されたレーザ光を前記空間光変調器に入力し、前記ホログラムにより前記レーザ光の位相変調を行う光変調ステップと、
位相変調後の前記レーザ光を集光する集光ステップと、
を繰り返し行い、
前記制御ステップでは、位相変調後の前記レーザ光を前記集光ステップにより被加工物の複数の照射点に集光させる前記ホログラムを前記空間光変調器に呈示させ、前記被加工物に照射される位相変調後の前記レーザ光の光軸と交差する第1の面内において前記複数の照射点により画成される被加工領域と、前記光軸と交差し前記第1の面から前記光軸の方向に離れている第2の面内において前記複数の照射点により画成される被加工領域との、形状及び大きさのうち少なくとも一方を互いに異ならせる、レーザ加工方法。 - 前記被加工物が位相変調後の前記レーザ光に対して光透過性を有し、
前記制御ステップでは、前記第1及び第2の面のうち前記被加工物の光照射表面からの距離が遠い一方の面における前記被加工領域の面積を、他方の面における前記被加工領域の面積よりも大きくする、請求項9に記載のレーザ加工方法。 - 前記制御ステップでは、前記被加工領域の形状及び大きさのうち少なくとも一方を、前記光軸の方向において連続的に変化させる、請求項9又は10に記載のレーザ加工方法。
- 前記制御ステップでは、前記第1及び第2の面のそれぞれにおいて、前記被加工領域を画定する仮想線に沿って各照射点の位置を変更する複数のホログラムを前記空間光変調器に順次呈示させる、請求項9〜11のいずれか1項に記載のレーザ加工方法。
- 観察光を前記被加工物に照射し、前記被加工物において反射した前記観察光を検出する光検出ステップを更に含み、
前記制御ステップでは、前記光検出ステップにおける検出結果に基づいて各照射点における加工状態を判断し、前記第1及び第2の面に対するホログラムの呈示時間を前記加工状態に応じて制御する、請求項9〜12のいずれか1項に記載のレーザ加工方法。 - 前記制御ステップでは、各面内において前記複数の照射点に含まれる少なくとも2つの前記照射点の光強度を互いに独立して制御する、請求項9〜13のいずれか1項に記載のレーザ加工方法。
- 前記制御ステップでは、前記第1の面内における前記複数の照射点の光強度と、前記第2の面内における前記複数の照射点の光強度とを互いに独立して制御する、請求項9〜14のいずれか1項に記載のレーザ加工方法。
- 前記制御ステップでは、ホログラムを変更する際に、或るホログラムを消去してから別のホログラムを呈示するまでの間、前記レーザ光の光強度を前記被加工物のいずれの部位においても加工閾値未満とするホログラムを前記空間光変調器に呈示させる、請求項9〜15のいずれか1項に記載のレーザ加工方法。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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JP2020070002A JP6934083B1 (ja) | 2020-04-08 | 2020-04-08 | レーザ加工装置及びレーザ加工方法 |
PCT/JP2021/005956 WO2021205756A1 (ja) | 2020-04-08 | 2021-02-17 | レーザ加工装置及びレーザ加工方法 |
US17/917,069 US20230185238A1 (en) | 2020-04-08 | 2021-02-17 | Laser processing device and laser processing method |
CN202180021284.0A CN115297989A (zh) | 2020-04-08 | 2021-02-17 | 激光加工装置及激光加工方法 |
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JP2009056507A (ja) * | 2007-09-03 | 2009-03-19 | Olympus Corp | レーザ加工装置 |
DE112008003101T5 (de) * | 2007-11-14 | 2010-10-14 | Hamamatsu Photonics K.K., Hamamatsu | Laser-Bearbeitungsvorrichtung und Laser-Bearbeitungsverfahren |
US8867113B2 (en) * | 2008-08-26 | 2014-10-21 | Hamamatsu Photonics K.K. | Laser processing device and laser processing method |
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