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A color image sensor with three stacked organic photoconductive films (OPFs) and transparent readout circuits for a high-resolution, high-sensitivity, compact color video camera is described. The sensor separates and simultaneously detects the three primary colors. We fabricated test image sensors and confirmed the feasibility of the color video camera with three stacked OPFs.
The purpose of this research was to predict breakdown of electrical equipment due to deterioration of insulation. An internal discharge pulse measurement system which could analyze the distribution of the discharge according to each phase area of the applied voltage (AC 50Hz) was developed. The system's features were as follows. A half cycle of the applied voltage starting from the negative peak and...
It is believed that the newly developed acoustic Maxwell stress sensor presented in this paper is a useful tool for the investigation of the interfacial electric field. We have successfully demonstrated the usefulness for amorphous insulating polymers such as PET, PVDF, and PE. We are presently improving the accuracy, range, and resolution of the equipment and studying its applicability to various...
In recent years, a number of investigations have been carried out on space charge formation in the bulk of insulating materials from both the physical and engineering points of view. It has been pointed out that the presence of space charge lowers the breakdown strength.1 It is, therefore, important in the case of utilization of dc power cable to investigate methods for preventing space charge formation...
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