Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1990-11-29
1991-09-24
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310316, 310328, 318116, H01L 4108
Patent
active
050516469
ABSTRACT:
In a scanning device producing an image from data obtained from a nonlinear piezoelectric scanner having an attached end and a free end providing the data from a lateral scanning motion of the free end a distance about a center position as a result of the connection of a changing scan voltage to elecrodes carried by the piezoelectric scanner, a method of making the scanning motion of the free end linear with time and increasing the speed at which the data is provided for producing the image. The method comprises the steps of providing a nonlinear signal with time which is a function of the nonlinearity of the piezoelectric scanner; amplifying the nonlinear signal to provide a corresponding nonlinear driving voltage; applying the nonlinear driving voltage to the electrodes of the scanner to scan the free end in a forward scanning motion; obtaining data for use in producing the image during the forward scanning motion; applying the nonlinear driving voltage to the elctrodes of the scanner to scan the free end in a backward scanning motion; obtaining data for use in producing the image during the backward scanning motion; and, repeating the bi-directional scanning and data inputting process until the data needed to create the image has been obtained.
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Elings Virgil B.
Gurley John A.
Budd Mark O.
Digital Instruments, Inc.
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