Sensor of electrostatic images

THE INVENTION CONCERNS A ELECTROSTATIC IMAGE SENSOR. AN EXAMPLE OF REALIZATION INCLUDES MAINLY TWO PADS 3, 5, 4 LAYER FORMED MATERIAL PHOTOCONDUCTOR AND DIELECTRIC LAYER 15 FORMED BY ELECTRET FOR POLARIZING LAYER 4 PHOTOCONDUCTOR, NOT REQUIRE A SOURCE OF VOLTAGE DURING THE RECORDING A PICTURE. STAGE DURING RECORDING SWITCH 14 SHORTS AND ELECTRODES 3 5. photocarriers ARE RELEASED BY X-RAY 1 TRAVERSE WITH AN OBJECT radiograph 2. THEY ARE MOVING IN THE ELECTRIC FIELD GENERATED BY THE 15 AND ELECTRET TEND TO CANCEL THE ELECTRIC FIELD INTERFACE OF TWO LAYER 4 AND 15. DURING STAGE READING, 14 SWITCH CONNECTS PADS 3 AND 5 TO INPUTS CURRENT AMPLIFIER 8 DURING THAT LIGHT BEAM 13 BRUSHES LAYER 4 MATERIAL PHOTOCONDUCTOR. Photocarriers MOVING AND VOID COMPLETELY ELECTRIC FIELD AT ANY POINT OF THE INTERFACE OF TWO LAYER 4 AND 15. THE POWER DETECTED BY AMP 8 LETS SEE A PICTURE ON A PICTURE TUBE 11. DURING INITIALIZATION PHASE , LAYER 4 PHOTOCONDUCTOR MATERIAL IS REDUCED TO STATE WITH A NEUTRAL POWER GENERATOR CONTINUING CONNECTED TO 12 PADS 3 AND 5 IN SWITCH 14. APPLICATION TO IMAGE SENSORS FOR RADIOLOGY.