納秒激光超聲測試系統(tǒng)設計及其應用畢業(yè)論文

1、第Ⅰ頁共Ⅱ頁目錄目錄1引言...................................................................11.1本文的研究的意義..................................................11.2國內外研究現(xiàn)狀....................................................12激光超聲理論.......

2、....................................................22.1激光超聲概述......................................................22.2激光器及產生超聲機理..............................................32.2.1熱彈機制..................................

3、..................32.2.2燒蝕激發(fā)機理................................................43激光測振技術的理論基礎.................................................53.1幾種測振方法......................................................53.1.1全息干涉法測量技術.

4、.........................................53.1.2散斑法測量技術..............................................73.1.3激光三角法..................................................83.1.4激光多普勒技術..............................................

5、93.2小結.............................................................154激光多普勒測量葉片振動頻率............................................154.1多普勒頻移效應...................................................154.2確定測量葉片振動的方法..............

6、.............................164.2.1激光干涉法測量葉片振動位移.................................164.2.2激光多普勒測量葉片振動（頻率混疊法）.......................184.2.3激光多普勒測量葉片振動（直接測量法）.......................214.3方案選取.................................

7、........................234.4器件的選擇.......................................................244.4.1激光器.....................................................244.4.2光電探測器.................................................254.4.3