Method of aligning a driving force with respect to a movable element using mechanical resonance
First Claim
1. A method of reducing movement of a reflector in an unintended mechanical mode during movement of the reflector in an intended mechanical mode, the method comprising:
- using a reflector driver to apply a distribution of forces to the reflector so as to move the reflector both in the intended mechanical mode and in the unintended mechanical mode, the distribution of forces applied at a resonant frequency of the unintended mechanical mode; and
adjusting the reflector driver to alter the distribution of forces applied to the reflector such that the movement of the reflector in the unintended mechanical mode is reduced.
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Accused Products
Abstract
A method reduces movement of a reflector in an unintended mechanical mode during movement of the reflector in an intended mechanical mode. The method includes using a reflector driver to apply a distribution of forces to the reflector so as to move the reflector in both the intended mechanical mode and in the unintended mechanical mode. The distribution of forces is applied at a resonant frequency of the unintended mechanical mode. The method further includes adjusting the reflector driver to alter the distribution of forces applied to the reflector such that the movement of the reflector in the unintended mechanical mode is reduced.
6 Citations
20 Claims
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1. A method of reducing movement of a reflector in an unintended mechanical mode during movement of the reflector in an intended mechanical mode, the method comprising:
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using a reflector driver to apply a distribution of forces to the reflector so as to move the reflector both in the intended mechanical mode and in the unintended mechanical mode, the distribution of forces applied at a resonant frequency of the unintended mechanical mode; and
adjusting the reflector driver to alter the distribution of forces applied to the reflector such that the movement of the reflector in the unintended mechanical mode is reduced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A device to measure a direction of a component of a magnetic field, the device comprising:
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a mechanical system positionable in the magnetic field, the mechanical system comprising;
a substrate;
a flap mechanically coupled to the substrate, the flap having a mechanical resonance mode with a resonant frequency;
a reflector coupled to the flap; and
an electrical conduit formed on the flap, whereby an electrical current flowing through the electrical conduit interacts with the magnetic field to apply a distribution of forces to the flap;
an electrical current source coupled to the electrical conduit, the electrical current source adapted to generate an electrical current with a time-dependent component with a frequency substantially equal to the resonant frequency;
a light source adapted to generate a collimated light beam incident on the reflector, the reflector reflecting at least a portion of the collimated light beam; and
a detector adapted to detect a displacement of the reflected portion of the collimated light beam.
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Specification