| 摘要 |
The force-sensitive position sensor or writing tablet is composed (for each of the two coordinate directions) of two layers of parallel extending light conductors having a spacing of 0.1 mm or less, the distance between the two layers being approximately 5 mu m. By locally exerting a force on the carrier material in which the light conductors are embedded, by means of the tip of a stylus, the light conductors are geometrically deformed. These deformations cause a variation of the optical coupling between the two locally deformed conductors, thus causing a detectable transfer of light variation from one conductor to the other. By connection of one layer to a light source and the other layer to a suitable detector, a force-sensitive position sensor can be constructed by means of electro-optical means.
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