運動物体に対する表面粗さ測定における物体運動の影響
Optics express
|December 19, 2025
まとめ
スペクトルスペックル相関(SSC)は、移動物体上の表面粗さを計測できるようになりました。新しいモデルは、粗さとモーションブラーを分離し、産業用途向けの高速、非接触計測を可能にします。
科学分野:
- 計測学
- 光学計測
- 表面科学
背景:
- スペクトルスペックル相関(SSC)は、表面粗さ測定のための非接触法です。
- 物体運動は通常、SSC測定の精度を低下させます。
- 既存の方法では動的な表面解析が困難です。
研究 の 目的:
- 物体運動を考慮したSSCの統一モデルを開発すること。
- 移動物体の正確な表面粗さ計測を可能にすること。
- スペックルコントラストに対するモーションブラーの影響を定量化すること。
主な方法:
- SSCにおける表面粗さとモーションブラーの寄与を分離する統一モデルを開発しました。
- 運動項の閉形式分散式を導出しました。
- 亜鉛めっき鋼板を様々な速度で移動させてモデルを検証しました。
主要な成果:
- モデルは、表面粗さとモーションブラーの寄与を正確に区別します。
- 測定された相関は、平均1.06%以内で理論的予測と一致しました。
- 最適化されたレーザーパラメータで、SSCが最大16 m/sの速度で動作する可能性を示しました。
結論:
- 開発されたSSCモデルにより、移動物体の正確な表面粗さ測定が可能になります。
- SSCは、インライン監視のための従来の輪郭測定法に代わる、実行可能な高スループットの代替手段です。
- この進歩は、高速移動表面の連続的な産業プロセス制御をサポートします。
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