| 摘要 |
An apparatus and method for controlling a coordinate position and/or orientation of a stylus. The apparatus functions by positioning an armature coupled to the stylus, which is disposed within a magnetic fluid. The magnetic fluid is contained within a cavity defined in a non-magnetic body. A controllable active magnetic field-generating structure disposed in proximity to the cavity is used to generate a variable magnetic field that acts upon the magnetic fluid, causing it to be displaced, thereby enabling the armature to be moved to a desired coordinate position and/or orientation. In one implementation, the invention may be used in free space optical communication systems, whereby the stylus comprises the end portion of a fiber optic cable that may be positioned so as to maximize the energy levels of both transmitted and received optical signals.
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