| 摘要 |
PURPOSE: To provide an optical memory card in which recording, reading and erasing operations of information comprising two-dimensional digital marks, etc., are conducted by only making the card close to a prescribed device. CONSTITUTION: The optical memory card main body 10 is integrally constituted of a memory region 11 which is made by sandwiching the both surfaces of a ferroelectric substance with transparent electrodes and further sandwiching them with a polarizer and an analyzer, and a voltage generating coil 12 which is connected to the electrodes. Data are written by irradiating images of the marks, etc., and applying voltages to the electrodes from the coil 12 through electromagnetic induction. |
