Code-based, electromagnetic-field-responsive graphic data-acquisition system
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United States of America Patent
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Sep 28, 1993
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N/A
app pub date -
Oct 7, 1992
filing date -
Oct 7, 1992
priority date (Note) -
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Abstract
An electromagnetic-field-responsive (preferably optical), code-based, graphic data-acquisition system for tracking the operational status of a mobile write-effective component (stylus, eraser, etc.) in relation to a defined writing-surface area. The preferred embodiment features an active optical structure which is disposed adjacent the writing-surface area for creating, by scanning, a defined zone of optical radiation, optically reactive, retroreflective code structure which is joined to the mobile component and which is capable of reacting (reflecting the same) to radiation within the zone when the code structure intersects the zone, a reaction monitoring structure for monitoring the reaction behavior of the code structure and for producing a related response, and interpretation structure which acquires that response and determines therefrom the desired operational-status-tracking information. Modification to this preferred structure are also illustrated and discussed.
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