Stiffness compensation in opto-mechanical mechanisms
AssigneeABB AB
InventorsMathieu J. Demers, Jean-Thomas Landry, Henry L. Buijs
Life of this patent
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Abstract
An optical scanning or positioning mechanism has a head on which optical components are mounted and an actuator coupled to the head to cause the head to move when the actuator is actuated. There are one or more sets of flexure bearings mounted in the mechanism. The flexure bearings have a restoring torque when moved from a rest position. The bearings are coupled to the head to allow the head to move when actuated by the actuator. One or more magnets are mounted in the mechanism in a location other than in the actuator to compensate for the flexure bearings restoring torque.
Claims8
An optical scanning or positioning mechanism comprising:
- a head having optical components mounted thereon;
- an actuator coupled to said head to cause said head to move when said actuator is actuated;
- one or more sets of flexure bearings mounted in said mechanism and coupled to said head to allow said head when actuated by said actuator to move, said one or more sets of flexure bearings each having a restoring torque when moved from a rest position by said head movement;
- and
- one or more permanent magnets mounted in said mechanism in a location other than in said actuator to compensate for said flexure bearings restoring torque.
In an optical scanning or positioning mechanism having a head with optical components mounted thereon, an actuator coupled to said head to cause said head to move when said actuator is actuated, one or more sets of flexure bearings mounted in said mechanism and coupled to said head to allow said head when actuated by said actuator to move, said one or more sets of flexure bearings having a restoring torque when moved from a rest position by said head movement, a method for providing compensation for said restoring torque of said one or more flexure bearings comprising:
- mounting one or more permanent magnets in said mechanism in a location other than in said actuator to compensate for said flexure bearings restoring torque.
A method for making an optical scanning or positioning mechanism having a head having optical components mounted thereon comprising:
- coupling an actuator to said head to cause said head to move when said actuator is actuated;
- providing one or more sets of flexure bearings mounted in said mechanism and coupled to said head to allow said head when actuated by said actuator to move, said one or more sets of flexure bearings having a restoring torque when moved from a rest position by said head movement;
- and
- mounting one or more permanent magnets in said mechanism in a location other than in said actuator to compensate for said flexure bearings restoring torque.
In an optical scanning or positioning mechanism having a head with optical components mounted thereon, an actuator coupled to said head to cause said head to move when said actuator is actuated, one or more sets of flexure bearings mounted in said mechanism and coupled to said head to allow said head when actuated by said actuator to move, said one or more sets of flexure bearings having a restoring torque when moved from a rest position by said head movement, a method for compensating for said restoring torque of said one or more flexure bearings comprising:
- using the magnetic field of one or more permanent magnets mounted in said mechanism in a location other than in said actuator to provide a force to compensate for said restoring torque of said one or more flexure bearings.
Dependencies are inferred from the claim text.