| 摘要 |
This invention discloses an optical data-card drive system. The drive system includes an optical pickup head for rotationally moving over and accessing data stored in the optical data-card. The optical pickup head is provided for reading data from and writing data to the optical data card. The optical pickup head may be applied for accessing data over substantially one-half of the rotational movement. In another preferred embodiment, the optical pickup head is applied for accessing data over several arc-segments during the rotational movement. The optical pickup head may be design for rotating in a single rotational direction, or for rotating in clockwise and counterclockwise directions. Furthermore, the optical pickup head may be designed for rotating over arc segment having radius smaller than half-width of the optical data card, or for rotating over an arc segment having a radius greater than half-width of the optical data card. In a preferred embodiment, the optical pickup head is provided as a removable and replaceable module. The optical pickup head may access the data by contacting the optical data card, or by rotating at a distance above the optical data card. The optical data-card drive system further includes a motor that has a rotating shaft for mounting and rotating the optical pickup head. Also, the optical pickup head further includes a data signal transformer for transforming a data signal through data signal induce changes of magnetic flux
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