| Project/Area Number |
16360122
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Intelligent mechanics/Mechanical systems
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| Research Institution | Shizuoka University |
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Principal Investigator |
EGAMI Chikara Shizuoka University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (70262798)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥15,000,000 (Direct Cost: ¥15,000,000)
Fiscal Year 2006: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2005: ¥5,100,000 (Direct Cost: ¥5,100,000)
Fiscal Year 2004: ¥6,300,000 (Direct Cost: ¥6,300,000)
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| Keywords | Microscope / Memory / Polymer / Sphere |
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| Research Abstract |
We propose a new optical data storage system with dye-doped minute spheres. The system uses the confocal polarization microscope. In order to avoid a problem of jitter as instability of rotating disk speed and resultant fluctuation of recording bit formation, we have devised a new process. The process involves the use of dye-doped minute spheres arranged upon a surface-relief structure as recording bits. By using dye-doped minute spheres we can limit a sensitive region within a sphere's diameter. Alternate laminating recordable sphere layer with sensitivity and buffer layer with insensitivity structurally limits recording bits in three dimensions.
Using a reflection-type confocal optical microscope, we read out shape signals from minute spheres at high resolution. The shape signal from each minute sphere is utilized as a clock signal in recording and readout. The clock signal can be produced by separating a high-level signal and a low-level signal on the basis of a threshold. In our minute sphere optical storage system, a shift between positions of the recording bit and the clock signal does not occur because the clock signal is generated based on the shape signal from a minute sphere as the recording bit.
The jitter-free technique proved to be extremely effective for disk recording and readout.
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