JP2021165769A - 光学装置および3次元造形装置 - Google Patents
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Abstract
【解決手段】光学装置12は、照明光学系21と、光変調器22と、投影光学系23とを備える。照明光学系21は、レーザ光L31の短軸方向および長軸方向における強度分布をガウス分布から変換して、光変調器22の変調面における平行ビームL32の短軸方向および長軸方向の強度分布をトップハット分布とするビームシェイパ213を備える。 投影光学系23では、長軸方向について、第3レンズ233および第4レンズ234により、上記変調面と照射面131とが光学的に共役とされる。また、短軸方向について、第1レンズ231、第2レンズ232および第3レンズ233により、当該変調面と第4レンズ234の前側焦点位置とが光学的に共役とされる。第4レンズ234は、当該前側焦点位置におけるトップハット分布のビームを照射面131に集光させる。これにより、光変調器22への投入光量を増大させることができる。
【選択図】図4
Description
11 レーザ光源
12 光学装置
13 走査部
21 照明光学系
22 光変調器
23 投影光学系
91 造形材料
131 照射面
132 ガルバノミラー
213 ビームシェイパ
221 ピクセル
231 第1レンズ
232 第2レンズ
233 第3レンズ
234 第4レンズ
235 長軸側遮光部
236 短軸側遮光部
L31 レーザ光
L32 平行ビーム
L33 変調ビーム
Claims (7)
- 対象物上の照射面に変調ビームを照射する光学装置であって、
レーザ光を長軸方向に長い線状の平行ビームに整形する照明光学系と、
前記平行ビームを変調ビームに変調する光変調器と、
前記変調ビームを対象物の照射面に導く投影光学系と、
を備え、
前記照明光学系は、前記レーザ光の短軸方向および前記長軸方向における強度分布をガウス分布から変換して、前記光変調器の変調面における前記平行ビームの前記短軸方向および前記長軸方向の強度分布をトップハット分布とするビームシェイパを備え、
前記投影光学系は、
第1レンズと、
前記第1レンズよりも前記変調ビームの進行方向に位置する第2レンズと、
前記第1レンズよりも前記変調ビームの進行方向に位置する第3レンズと、
前記第1レンズ、前記第2レンズおよび前記第3レンズよりも前記変調ビームの進行方向に位置する第4レンズと、
を備え、
前記長軸方向について、前記第3レンズおよび前記第4レンズにより前記変調面と前記照射面とが光学的に共役とされ、
前記短軸方向について、前記第1レンズ、前記第2レンズおよび前記第3レンズにより、前記変調面と前記第4レンズの前側焦点位置とが光学的に共役とされ、前記第4レンズは、前記前側焦点位置におけるトップハット分布のビームを前記照射面に集光させることを特徴とする光学装置。 - 請求項1に記載の光学装置であって、
前記第3レンズは前記第2レンズよりも前記変調ビームの進行方向に位置することを特徴とする光学装置。 - 請求項1または2に記載の光学装置であって、
前記投影光学系は、
前記第3レンズと前記第4レンズとの間に位置し、前記光変調器からの長軸側の非0次回折光を遮る長軸側遮光部と、
前記第1レンズと前記第2レンズおよび前記第3レンズとの間に位置し、前記光変調器からの短軸側の非0次回折光を遮る短軸側遮光部と、
をさらに備えることを特徴とする光学装置。 - 請求項1ないし3のいずれか1つに記載の光学装置であって、
前記光変調器は、2次元配列された複数の変調素子を備えることを特徴とする光学装置。 - 請求項4に記載の光学装置であって、
前記光変調器はPLVであることを特徴とする光学装置。 - 3次元造形装置であって、
請求項1ないし5のいずれか1つに記載の光学装置と、
前記光学装置へと前記レーザ光を出射するレーザ光源と、
前記光学装置からの前記変調ビームが照射される前記対象物であり、前記変調ビームを造形材料上で走査する走査部と、
を備えることを特徴とする3次元造形装置。 - 請求項6に記載の3次元造形装置であって、
前記走査部は、回転することによって前記変調ビームの進行方向を変更するガルバノミラーを備えることを特徴とする3次元造形装置。
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JP2020068194A JP7395410B2 (ja) | 2020-04-06 | 2020-04-06 | 光学装置および3次元造形装置 |
EP21165856.2A EP3919959B1 (en) | 2020-04-06 | 2021-03-30 | Optical apparatus and three-dimensional modeling apparatus |
US17/219,209 US11588080B2 (en) | 2020-04-06 | 2021-03-31 | Optical apparatus and three-dimensional modeling apparatus |
CN202110358008.5A CN113492218B (zh) | 2020-04-06 | 2021-04-01 | 光学装置以及三维造型装置 |
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EP4324625A1 (en) | 2022-08-17 | 2024-02-21 | SCREEN Holdings Co., Ltd. | Optical apparatus and three-dimensional modelling apparatus |
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CN115401215B (zh) * | 2022-09-16 | 2023-06-27 | 爱司凯科技股份有限公司 | 使用非球柱面镜组调节光斑形状及能量分布的装置及方法 |
JP2024045830A (ja) * | 2022-09-22 | 2024-04-03 | 株式会社Screenホールディングス | レーザマーカ |
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US20210313492A1 (en) | 2021-10-07 |
JP7395410B2 (ja) | 2023-12-11 |
EP3919959A1 (en) | 2021-12-08 |
US11588080B2 (en) | 2023-02-21 |
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EP3919959B1 (en) | 2022-09-14 |
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