Pyroelectric copying device
Abstract
Abstract THERE IS DISCLOSED AN ELECTROSTATIC COPYING DEVICE BASED UPON THE PHENOMENON OF PYROELECTRICITY IN SUITABLE MATERIALS SUCH AS POLYMERIC POLYVINYLIDENE FLUORIDE. LOCALIZED TEMPERATURE CHANGES CAUSED BY AN INTENSE LIGHT SOURCE GENRATE ELECTROSTATIC CHRGE PATTERNS ON THE MATERIAL WHEN EXPOSED TO THE IMAGE OF AN OBJECT INTERPOSED BETWEEN THE LIGHT SOURCE AND THE MATERIAL. BY USING THIN PYROELECTRIC FILMS TO MINIMIZE THERMAL DIFFUSION, IT IS POSSIBLE TO OBTAIN SUFFICIENT RESOLUTION TO ALLOW THE CHARGE PATTERNS TO BE OBSERVED AFTER TONING THE FILMS WITH ELECTROSTATICALLY CHARGED INKS. THE DEVICE IS COMPARABLE IN MANY RESPECTES TO CONVENTIONAL XEROGRAPHIC DEVICES AND ADVANTAGES IN THE SENSE THAT ITS RESPONSE IS NOT WAVELENGTH DEPENDENT AND ITS STRUCTURE AND OPERATION ARE CONSIDERABLY SIMPLIFIED.
Inventors
- 👤 J Bergman
- 👤 G Crane
Bibliographic Details
Claims Analysis
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