| 摘要 |
A thermographic material of the type in which a thermoplastic layer on a photosensitive semiconductor is electrostatically charged and the stack is then heated so that the charge induces structural changes in the thermoplastic layer to provide a hologram or other image. The thermoplastic layer contains or is formed with a layer of magnetic particles, e.g. of delta Fe2O3 or Fe3O4, which, when a magnetic field is applied simultaneously with heating, greatly improves the results of signal to noise ratio of the imaging system. |
