博碩士論文 91226001 詳細資訊


姓名 王瑞鑫(Jui-Hsin Wang)  查詢紙本館藏   畢業系所 光電科學與工程學系
論文名稱 穿透式全像光碟光學讀取之研究
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摘要(中) 本論文是利用球面波位移技術與共軛光讀取架構結合體積全像的繞射特性,設計一高儲存容量與高傳輸速度的光學儲存系統,並以其光學讀取訊號研究系統的特性。因為讀取光與參考光的相位不匹配,讀取光微小位移將使得繞射強度快速地衰減,因此系統將發展出具有高儲存容量的特性。另外,此儲存系統之訊號輸入元件為一空間調制器,因此系統將擁有光學平行處理的能力,增加訊號的傳輸速度。
論文中,將針對體積全像的繞射訊號以相位疊加法做進一步分析。經相位疊加法運算,我們可得到訊號輸出面上的繞射光場,並以此繞射訊號的相對強度變化判定位移容忍度的大小。此外,因為訊號輸入為陣列式畫素分佈,因此我們針對訊號為畫素形式提出另一種計算的模型,並研究其繞射訊號特性與系統的位移容忍度。最後,以位移容忍度來討論系統參數的最佳化、儲存容量與實現此全像儲存系統的困難。
關鍵字(中) ★ 全像儲存
★ 體積全像
★ 相位疊加法
關鍵字(英)
論文目次 I
第一章緒論................................................................ 1
1.1 全像光學儲存.......................................................... 1
1.2 全像儲存之位移多工.................................................... 2
1.3 論文大綱.............................................................. 3
第二章體積全像的繞射效率.................................................. 4
2.1 耦合理論法............................................................ 4
2.2 相位疊加法........................................................... 11
第三章穿透式全像位移多工儲存系統......................................... 14
3.1 系統架構............................................................. 14
3.2 相位疊加法之模擬..................................................... 15
3.2.1 取樣點的分佈....................................................... 18
3.2.2 積分近似法......................................................... 21
3.2.3 取樣點的數量....................................................... 25
3.3 體積全像之位移選擇性................................................. 28
3.4 討論................................................................. 40
第四章以空間調制器為物光輸入之讀取特性................................... 41
4.1 空間調制器的理論模型................................................. 41
4.2 空間調制器的空間特性................................................. 47
4.2.1 因空間位置不同的繞射訊號........................................... 47
4.2.2 因空間位置不同的位移選擇性......................................... 50
4.3 系統的參數與讀取特性................................................. 54
4.3.1 物光的入射角θ...................................................... 54
4.3.2 參考光的散角φ...................................................... 56
4.3.3 儲存介質厚度....................................................... 58
4.4 讀取光的失焦......................................................... 60
4.5 相位共軛光之讀取系統................................................. 63
4.6 系統之儲存容量....................................................... 66
4.7 討論................................................................. 66
第五章結論............................................................... 68
參考文獻................................................................. 69
參考文獻 69
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指導教授 孫慶成(Ching-Cherng Sun) 審核日期 2004-7-14
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