Pyroelectric Imaging - A Novel Process for Image Recording

热释电成像 - 一种新的图像记录过程

• 批准号: 07455031
• 负责人: KOKADO Hiroshi
• 金额: $ 0.45万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455031/
• 关键词: Ferroelectrics; Image Recording; Pyroelectricity; Polyvinylfluoride

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.

本工作涉及一种新的成像方法，即在铁电聚合物膜上形成稳定的可擦除静电图像，并通过热释电激活到电压对比度，检查了极化反转的要求。由于观察到的矫顽场随温度的变化是如此之小，以至于乍一看很难控制加工条件。在脉冲加热中，极化反转在低至60 ° C的温度下完成。据推测，在薄膜中的温度的不均匀性带来了局部增强的字段和极化反转开始在那里，并传播整个膜的深度。这种“放大”效应应该是基于铁电体的协同效应，如上所述形成的潜像非常稳定，甚至在15天后也没有观察到劣化。它是成功地开发与调色剂热释电激活后，通过均匀加热的薄膜下居里温度。发现显影后的图像密度与膜的厚度成正比，但在6 μ m厚的膜处饱和。当时的密度是1.5。从工艺设计的角度来看，热释电成像被证实是实际可行的。