Three dimensional confocal optical memory

三维共焦光学存储器

• 批准号: 05044097
• 负责人: KAWATA Satoshi
• 金额: $ 3.84万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05044097/
• 关键词: optical memory; confocal; photopolymer; photorefractive; nonlinear; three dimensional optics; 位相差顕微鏡; ホログラフィックメモリ; 3次元; 共焦点; 収差; 位相差光学系

Three dimensional confocal optical memory was studied. Data were recorded by focused bean in a photopolymer as refractive-index dot. The data were read out with phase contrast micrscope.We achieved 30 layrs recording and reading. The distance between layrs were 10 mum, and the distance between data were 2 mum.A confocal phase-contrast microscope was developed for data reading system. The contrast of data image read out with the confocal phase-contrast microscope is greatly improved compared to one with conventional phase-contrast microscope.Erasable three dimensional optical memory was studied. Photorefractive crystal was used for data-recording medium. Data were recorded by focused beam, and erased with uniform illumination.We developed a calculation method to solve Kukhtarv's equations without any approximation. We confirmed that one-bit datum could be recorded by focused beam, and the induced refractive-index localized at the point of focused beam, and the data did not disappear more than one week.We also determined the optimum direction of crystal axis to the optical axis of reading system.

研究了三维共焦光存储器。数据记录是通过聚焦光束在光聚合物作为折射率点。用相衬显微镜读出数据，共记录和阅读30层。层间距为10 μ m，数据间距为2 μ m。研制了用于数据阅读系统的共焦相差显微镜。与传统的相衬显微镜相比，共焦相衬显微镜读出的数据图像对比度有了很大的提高。采用光折变晶体作为数据记录介质。采用聚焦光束记录数据，均匀照明擦除数据，提出了一种无需任何近似求解Kukhtarv方程的计算方法。确定了聚焦光束可以记录1位数据，诱导折射率仅在聚焦光束处，数据不消失超过一周，并确定了晶轴与阅读系统光轴的最佳方向。

项目成果

河田聡,: "新しい光学顕微鏡、第1巻:レーザー顕微鏡の理論と実際" 学際企画, (1995)

Satoshi Kawata，：“新光学显微镜，第一卷：激光显微镜的理论与实践”跨学科规划，（1995）

河田聡: "レーザー技術の新展開" 日本学会事務センター, (1995)

Satoshi Kawata：“激光技术的新发展”日本协会管理中心，（1995）

S.Kawata,T.Tanaka,Y.Hashimoto,Y.Kawata: "Three-dimensional Confocal Optical Memory Using Photorefractive Material" Proc.Soc.Photo-Opt.Instrum.Eng.2042. (1993)

S.Kawata，T.Tanaka，Y.Hashimoto，Y.Kawata：“使用光折变材料的三维共焦光学存储器”Proc.Soc.Photo-Opt.Instrum.Eng.2042。

Y.kawata,H.Ueki,Y.Hashimoto,and S.Kawata: "Three dimensional optical memory using a photorefractive crystal" Appl.Opt.(in press).

Y.kawata、H.Ueki、Y.Hashimoto 和 S.Kawata：“使用光折变晶体的三维光学存储器”Appl.Opt.（正在印刷中）。

C.J.R.Sheppard,M.Gu,Y.Kawata,and S.Kawata: "Three-dimensional transfer functions for high-aperlure systems" J.Opt.Soc.Am.A. 11. 593-598 (1994)

C.J.R.Sheppard、M.Gu、Y.Kawata 和 S.Kawata：“高孔径系统的三维传递函数”J.Opt.Soc.Am.A。