Gsi Lumonics Corporation

Gsi Group Corporation

Cambridge Technology, Inc.

Novanta Corporation

Gsi Lumoniss Corporation

David C Brown

Felix Stukalin

Michael B Nussbaum

Adam I Pinard

Kurt A Pelsue

Edward L Kelley

Ian Williamson

Evghenii Onoicenco

A method is disclosed of fabricating a mirror for use in limited rotation motor systems, said method comprising the steps of providing a mirror structure including at least one wall section, and exposing the at least one wall section to a fluid etching agent to thereby provide chemical milling of the mirror structure.

Systems and methods for providing mirrors with high stiffness and low inertia involving chemical etching

A taut-band resonant scanner is disclosed that includes an elongated band and a sub-assembly. The elongated band has a length in an elongated direction, a width in a width direction that is orthogonal to the elongated direction, and a thickness in a thickness direction that is orthogonal to both the width direction and the elongated direction, wherein the thickness is substantially smaller than the width and wherein the width direction and elongated direction define a band width/length plane. The sub-assembly is attached to a portion of the band, and includes at least one mounting structure.

Low cost long-life compact low wobble wide scan angle taut-band resonant scanners with matched coefficients of thermal expansion and interchangeable mirrors

A method of balancing a mirror in a limited rotation motor system is disclosed. The method includes the steps of providing a mirror on a rotor shaft of the limited rotation motor system such that the mirror is initially imbalanced in that the mirror is slightly more weighted to lean to a front side of the mirror that includes a front reflective face of the mirror, and adjusting at least one threaded counterweight screw on a back side of the mirror at least to a position at which the mirror becomes balanced between the front and back sides.

Systems and methods for balancing mirrors in limited rotation motor systems

A mirror is disclosed for use in a limited rotation motor system, wherein the mirror includes a body, an aperture within the body, and a high density material within the aperture. The body, formed of one or more materials, has an exposed mirror surface and is mountable with the limited rotation motor system for rotation with respect to an axis of mirror rotation. The aperture is positioned at least proximate to a portion of the axis of mirror rotation. The high density material is provided within the aperture such that it is capable of movement within the aperture, and the high density material has a density that is greater than a density of the material of the body of the mirror.

Systems and methods of providing improved performance of scanning mirrors coupled to limited rotation motors

A high power laser processing system is disclosed that includes a laser source and at least one optical element. The laser source provides a high power laser illumination of a first wavelength. The optical element includes a substrate that is substantially transparent to the first wavelength illumination, at least one highly reflective coating on a first side of the substrate, and at least one anti-reflective coating on a second side of the substrate.

System and method for high power laser processing

A limited rotation motor system is disclosed that includes a rotor shaft mounted within first and second bearing units. The rotor shaft is coupled to a helically shaped torsion member that is fixed with respect to a motor housing.

System and method for providing rotation control in a limited rotation motor system

A mirror is disclosed for use in motor system. The mirror includes a composite with at least one of silicon carbide, boron, and boron carbide and an alloying agent that increases the electrical conductivity of the composite sufficient for the composite to be processed by electrical discharge machining.

Method for optimal material selection and processing for dynamic mirror applications

A rotor is disclosed for a galvanometer system. A rotor includes a permanent magnet core, a sleeve and at least one shaft unit. The sleeve encloses and attaches to at least a portion of the permanent magnet core. The sleeve is formed of a material having a density of less than about 0.283 lb/in. The shaft unit is attached to both the permanent magnet core and to the sleeve. An output device may be coupled to the shaft unit, and the shaft unit is formed of a material having a dynamic stiffness of at least about 1.00&#xd7;10lb in/slug.

Composite rotor and output shaft for galvanometer motor and method of manufacture thereof

The invention provides a method and apparatus for directing a radiation beam () in a desired direction. There is provided a movable member () supported for movement by a fixed member () and the movable member has an optical element, e.g a flat mirror () fixedly attached thereto. In one embodiment the mirror scans a radiation beam incident thereon in one plane. In a second embodiment, the radiation beam is scanned in two mutually perpendicular planes. A magnetic element () having a north and a south magnetic pole is fixedly attached to the movable member (). A magnetically permeable stator element () that is stationary with respect to the movable member () and the magnetic element () is placed in the field of the magnetic element such that the stator element and said magnetic element mutually generate a magnetic traction force between them. A current coil () is wound around a portion of the stator element () and a current driver () is provided for driving a current in the current coil (). The current induces an electromagnetic force in the stator element () and the electromagnetic force acts on the magnetic element () for controlling movement of the optical element () with respect to the fixed element (). A radiation beam source () may be directed onto the movable mirror surface () and scanned by the movement of the mirror to direct the radiation beam in a desired propagation direction. Alternately, a radiation source () may be attached to the movable member () and pointed in a desired direction.

Method and apparatus for beam deflection

A method and apparatus for supporting a movable member () with respect to a fixed member () is provided. The movable member () includes a magnetically permeable portion () contained therein and magnetic element () fixedly attached thereto and movable therewith. The movable member () is supported for rotation with respect to the fixed member () by an outer bearing surface () of the movable member and an inner bearing surface () of the fixed member (). The fixed member () provides access to the movable member () from two sides thereof. A magnetically permeable stator element () is fixedly attached to the fixed member () and positioned within a magnetic flux field of the magnetic element () such that an air gap () is formed between the magnetic element () and the stator element (). Accordingly a magnetic traction force acts across the air gap () for urging the moveable member () toward the fixed member () thereby clamping the movable element in a fixed orientation with respect to the movable element. The stator element () includes stator current coils () wound onto portions of the stator element for inducing electromagnetic forces within the stator element in response to a current passing through the coils. The electromagnetic force acts on the magnetic element () to move the movable member () in a controllable manner.

Apparatus for controlled movement of an element

A limited rotation torque motor is disclosed including a rotor with at least one pair of magnetic poles and a stator with at least one pair of stator coils. Each stator coil includes a plurality of layers of interconnected flexible circuit composites. Each flexible circuit composite includes a dielectric material and a patterned conductive material on one side of said dielectric material.

Galvanometer motor with composite stator assembly

A limited rotation torque motor is disclosed that includes a rotor and a stator. The rotor includes a plurality of pairs of magnetic poles and the stator includes a plurality of pairs of stator coils. Each stator coils extends along a longitudinal length of the motor.

Galvanometer motor with composite rotor assembly

A continuous optical calibration system for a galvanometer scanner. The system maintains one or more fiducial position references in each axis, independent of the normal position detector circuit. An optical reference position monitor circuit triggers a calibration signal when load position coincides with a reference position, whereupon the measured position of the position detector and then current look up table is compared to the known reference position, and an error correction is generated and applied to the look up table. The optical monitor circuit includes a rotor rigidly attached to the load shaft so as to rotate between a light emitter and detector. A thin slit in the rotor permits passage of a highly collimated light beam to the detector only when the slit is aligned between the emitter and detector, which occurs only when the load is at or passing through the reference position.

Continuous position calibration for servo controlled rotary system

A high precision torque motor, including a partial rotation drive suitable for use in a galvanometer scanner, where the rotor is supported within the stator and housing assembly on all ceramic ball bearings, including inner and outer races and bearing balls. The ceramic ball bearing assemblies and all structural support elements have substantially equal coefficients of expansion through the use of matched expansion, nickel-iron alloy for the rotor shaft, stator, housing and other structural components which contact, locate, and support the inner and outer bearing races. The non-conductive bearings permit exclusion of any grounding conductor strap as between the rotor shaft and the housing.

Growing community of inventors

Northborough, MA, United States of America

David C Brown