臺灣博碩士論文加值系統

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

[1] Asthana and B. Finkelstein, ”Superdense opotical storage system,” IEEE Spectrum, P.25-31 (1995).
[2] F. H. Mok, “ Angle-multiplexed storage of 5000 holograms in lithium niobate,” Opt. Lett. 18, 915-917 (1993).
[3] F. T. S. Yu, S. Wu, A. W. Mayers, and S. Rajan, “ Wavelength multiplexedreflection matched spatial filters using LiNbO3," Opt. Commun. 81, 343-347 (1991).
[4] C. Denz, G. Pauliat, and G. Roosen, " Volume hologram multiplexing using a deterministic phase encoding method," Opt. Commun. 85, 171-176 (1991).
[5] C. C. Sun and W. C. Su, “Three-dimensional shifting selectivity of random phase encoding in volume holograms,” Appl. Opt. 40, 1253-1260 (2001).
[6] K. Curtis, A. Pu, and D. Psaltis, " Method for holographic storage using peristrophic multiplexing, " Opt. Lett. 19, 993-995 (1994). P.1
[7] D. Psaltis, M. Levene, A. Pu, G. Barbastathis, and K. Curtis, " Holographic storage using shift multiplexing," Opt. Lett. 20, 782-784 (1995).
[8] G. Barbastathis, M. Levene, and D. Psaltis, “ Shift multiplexing with spherical reference waves,” Appl. Opt. 35, 2403-2417 (1996).
[9] G. J. Steckman, A. Pu, and D. Psaltis, “Storage density of shift-multiplexed holographic memory,” Appl. Opt. 40, 3387-3394 (2001).
[10] A. Pu, and D. Psaltis, “High-density recording in photopolymer-based holographic three-dimensional Disks,” Appl. Opt. 35, 2389-2398 (1996).
[11] S. Orlov, “Volume holographic data storage,” Communications of the ACM. 43, 46-54 (2000).
[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
[13] F. H. Mok, M. C. Tackitt, and H.M. Stall, ”Storage of 500 high-resolution holograms in a LiNbO3 crystal,” Opt. Lett. 16, 605-607 (1991)
[14] G. A. Rakuljic, V. Leyva, and A. Yariv, “Optical data storage by using orthogonal wavelength-multiplexed volume holograms,” Opt. Lett. 17, 1471-1473 (1992)
[15] M. C. Bashaw, R. C. Singer, J. F. Heanue, and L. Hesselink, “Coded-wavelength multiplexed volume holography,” Opt. Lett. 20, 1916-1918 (1995)
[16] C. Denz, G. Pauliat, G. Roosen, and T. Tshudi, “ Potentialities and limitations of hologram multiplexing by using the phase-encoding technique,” Appl. Opt. 31, 5700-5705 (1992).
[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)
[20] N. V. Kukhtarev, V. B. Markov, S. G. Soskin, and V. L. Vinetskii, “Holographic storage in electrooptic crystals. I. Steady state,” Ferroelectrics 22, 949, (1979).