| 摘要 |
<p>PURPOSE:To obtain a far infrared card capable of certainly protecting recording data by constituting the card of a card main body composed of a material permitting far infrared rays to easily transmit and the code member provided in the card main body and composed of a material good in the absorptivity of far infrared rays. CONSTITUTION:A far infrared card 10 is roughly constituted of a card main body 11 and the code member 13 provided to the indicated address 12 in the card main body and, as the material of the card main body 11, bakelite permitting far infrared rays to easily transmit is used and, as the material of the code member 13, a far infrared absorbable polymer such as melamine or nylon having good absorptivity to far infrared rays with a specific wavelength is used. The code member 13 is constituted 10 code pieces 13A, 13B,...13J arranged to the set addresses in the card main body 11 and the respective code pieces are classified into five stages n thickness and different data are recorded by combining the thicknesses and arrangement positions. As a result, this card receives no effect due to an external magnetic field at all and the destruction of recorded data due to magnetism can be certainly prevented.</p> |
