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研究生:林俊琛
研究生(外文):Jun-Chen Lin
論文名稱:鈮酸鋰碟片多層次儲存其均勻繞射效率之曝光時間分析
論文名稱(外文):Exposure schedule for multilayer storage in a shift-multiplexed holographic LiNbO3 disk
指導教授:吳慕鄉
指導教授(外文):Mu-Shiang Wu
學位類別:碩士
校院名稱:大同大學
系所名稱:光電工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2005
畢業學年度:93
語文別:英文
論文頁數:44
中文關鍵詞:全像術曝光時間多層次儲存均勻繞射效率
外文關鍵詞:exposure scheduleholographicholographymultilayer storage
相關次數:
  • 被引用被引用:0
  • 點閱點閱:83
  • 評分評分:
  • 下載下載:7
  • 收藏至我的研究室書目清單書目收藏:1
在本篇論文中我們設計出鈮酸鋰全像碟片多層次儲存的曝光時間表。 因鈮酸鋰全像碟片多層次儲存的特殊結構, 這種多工方式結合了傳統多工與連續多工。為了均勻每張全像片的繞射效率, 我們參考兩種多工(傳統多工與連續多工)的曝光時間的方法,以得到我們所需的曝光時間表。
在使用這多工技術記錄全像片時, 因其記錄結構, 單一一張全像片其本身強度並不均勻, 進而影響重建影像之品質。我們討論使用毛玻璃去增加在全像片中的信號去獲得更完整的重建影像。
We propose a new exposure schedule for multilayer storage in a LiNbO3 holographic disk. The mechanism of multilayer storage in this paper combines conventional multiplexing and shift multiplexing. To make the diffraction efficiency of each hologram recorded in the memory uniformly, the new exposure schedule for multilayer storage in holographic disk is designed based on the principle of exposure schedule for conventional multiplexing and shift multiplexing.
Using shifting multiplexing technique to record holograms, the recording strength of the hologram will be erased partly by the other holograms, and this effect will decrease the image quality of reconstructed diffraction. In this paper, we use a ground glass to improve the image quality for multilayer shift-multiplexed holograms.
CHINESE ABSTRACT I
ENGLISH ABSTRACT II
TABLE OF CONTENTS III
LIST OF FIGURES V
LIST OF TABLES IX
Chapter 1 INTRODUCTION 01
Chapter 2 BASIC PRINCIPLE
2.1 Photorefractive effect 05
2.2 The function of exposure schedule 10
Chapter 3 EXPOSURE SCHEDULE FOR VARIOUS MULTIPLEXING
3.1 Exposure schedule for convention multiplexing 12
3.2 Computer Simulation of convention multiplexing 14
3.3 Exposure Schedule for sequence exposure 16
3.4 Computer Simulation of sequence exposure 20
3.5 Exposure schedule for multilayer storage 24
3.6 Computer Simulation of multilayer storage 27
Chapter 4 GROUND EFFECT 35
Chapter 5 CONCLUSION 41
REFERENCE 42
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[12] 李宣皓, ”鈮酸鋰全像碟片多層次儲存之研究,” 大同大學光電工程研究所,碩士論文,民國93年
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[17] D. Psaltis, M. Levene, A. Pu, G. Barbastathis, and K. Curtis, “Holographic storage using shift multiplexing,” Opt. Lett. 20, 782-784 (1995)
[18] 陳郁文, “利用亂相編碼於全像光學身份辨識系統之應用,” 大同大學光電工程研究所,碩士論文,民國92年
[19] Xiaosu Ma, Qingsheng He, and Jinnan Wing, “Exposure-schedule study of uniform diffraction efficiency for DSSM holographic storage,” Opt. Express 12, 984-989 (2004)
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