| Project/Area Number |
07455031
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Applied optics/Quantum optical engineering
|
|---|
| Research Institution | Chiba University |
|---|
Principal Investigator |
KOKADO Hiroshi Department of Image Science, Faculty of Engineering, Chiba University, Professor, 工学部, 教授 (40016358)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HOSHINO Katsuyoshi Department of Image Science, Faculty of Engineering, Chiba University, Associate, 工学部, 助手 (50192737)
KITAMURA Takashi Department of Image Science, Faculty of Engineering, Chiba University, Associate, 工学部, 助教授 (20009541)
|
|---|
| Project Period (FY) |
1995 – 1996
|
| Project Status |
Completed (Fiscal Year 1996)
|
| Budget Amount *help |
¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1996: ¥700,000 (Direct Cost: ¥700,000)
|
|---|
| Keywords | Ferroelectrics / Image Recording / Pyroelectricity / Polyvinylfluoride |
|---|
| Research Abstract |
This work concerns a novel imaging process in that a stable and erasable electrostatic image is formed on a ferroelectric polymer film and activated to a voltage contrast by means of pyroelectricity.
Requirements for polarization reversal were examined. Since the observed change with temperature in coercive field was so small that at the fist sight a difficulty in controlling the processing condition was foreboded. In pulse heating, however, the polarization reversal was completed at temperatures as low as 60ﾟC.It was inferred that the inhomogeneity in temperature in the film brought forth the local enhancement of field and the polarization reversal started there and propagated throughout the depth of film. This "amplification" effect should be based on the cooperation effect of ferroelectrics.
The latent image formed as above was quite stable and no deterioration was observed even after 15 days. It is successfully developed with toners after pyroelectric activation by a uniform heating of films under the Curie temperature. The image density after development was found to be proportional to the thickness of film, but saturated at 6mum thick film. The density then was 1.5. From the standpoint of process design, the pyroelectric imaging was confirmed to be practically workable.
|
