Patents by Inventor Leon A. Newman

Leon A. Newman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210242650
    Abstract: A radio-frequency excited carbon dioxide (CO2) or carbon monoxide (CO) gas laser includes two electrodes, which have passivated surfaces, within a sealed housing. Features in a ceramic slab or a ceramic cylinder located between the electrodes define a gain volume. Surfaces of the ceramic slab or the ceramic cylinder are separated from the passivated surfaces of the electrodes by small gaps to prevent abrasion thereof. Reducing compressive forces that secure these components within the housing further reduces abrasion, thereby extending the operational lifetime of the gas laser.
    Type: Application
    Filed: January 28, 2021
    Publication date: August 5, 2021
    Applicant: Coherent, Inc.
    Inventors: Leon A. NEWMAN, Michael Leigh ERMOLD, James HYLAND, Thomas V. HENNESSEY, JR., Lanny LAUGHMAN
  • Patent number: 8731015
    Abstract: A compact CO2 slab-laser is contained in a fluid cooled housing having three compartments. One compartment houses discharge electrodes and a laser resonator. Another compartment houses a radio-frequency power supply (RFPS) assembled on a fluid-cooled chill plate and an impedance-matching network. The remaining compartment houses beam-conditioning optics including a spatial filter. The housing and RFPS chill-plate are on a common coolant-fluid circuit having a single input and a single output. The spatial filter is optionally fluid-coolable on the common coolant fluid circuit.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: May 20, 2014
    Assignee: Coherent, Inc.
    Inventors: Leon A. Newman, Adrian Papanide, Mathew David Rzewnicki, Thomas V. Hennessey, Jr.
  • Publication number: 20130259074
    Abstract: A compact CO2 slab-laser is contained in a fluid cooled housing having three compartments. One compartment houses discharge electrodes and a laser resonator. Another compartment houses a radio-frequency power supply (RFPS) assembled on a fluid-cooled chill plate and an impedance-matching network. The remaining compartment houses beam-conditioning optics including a spatial filter. The housing and RFPS chill-plate are on a common coolant-fluid circuit having a single input and a single output. The spatial filter is optionally fluid-coolable on the common coolant fluid circuit.
    Type: Application
    Filed: February 4, 2013
    Publication date: October 3, 2013
    Applicant: COHERENT, INC.
    Inventors: Leon A. NEWMAN, Adrian PAPANIDE, Mathew David RZEWNICKI, Thomas V. HENNESSEY, JR.
  • Patent number: 8290017
    Abstract: A carbon-dioxide (CO2) gas-discharge slab laser includes elongated discharge-electrodes in a sealed enclosure. Radio Frequency (RF) power is supplied to the electrodes via an impedance matching network and a co-axial electrical low inductance transmission line feed-through sealed to the enclosure. The feed-trough includes two spring contacts which are configured to be spring compression push-fit in grooves in edges of the discharge-electrodes. A central conductor of the feed-through is fluid cooled. A capacitor of the impedance matching network is assembled on the central conductor as an integral part of the feed-trough.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: October 16, 2012
    Assignee: Coherent, Inc.
    Inventors: Leon A. Newman, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
  • Patent number: 8265116
    Abstract: A carbon-dioxide (CO2) gas-discharge slab laser includes elongated discharge-electrodes in a sealed enclosure. Radio Frequency (RF) power is supplied to the electrodes via an impedance matching network and a co-axial electrical low inductance transmission line feed-through sealed to the enclosure. The feed-trough includes two spring contacts which are configured to be spring compression push-fit in grooves in edges of the discharge-electrodes. A central conductor of the feed-through is fluid cooled. A capacitor of the impedance matching network is assembled on the central conductor as an integral part of the feed-trough.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: September 11, 2012
    Assignee: Coherent, Inc.
    Inventors: Leon A. Newman, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
  • Patent number: 8201954
    Abstract: A mirror assembly for a carbon dioxide (CO2) slab laser resonator includes a center section having a rectangular cross-section and a pair of thermal balancing bars. A concave reflecting surface formed on a front edge of a center section. The side-bars are attached to either side of the center section and extend forward of the reflective surface. Dimensions of the center section and side bars are selected to position the thermal neutral plane of the assembly close to the reflective surface. This minimizes changes the radius of curvature of the reflective surface due to heating by circulating radiation in the resonator.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: June 19, 2012
    Assignee: Coherent, Inc.
    Inventors: Adrian Papanide, Leon A. Newman, Lanny Laughman
  • Publication number: 20120033703
    Abstract: A carbon-dioxide (CO2) gas-discharge slab laser includes elongated discharge-electrodes in a sealed enclosure. Radio Frequency (RF) power is supplied to the electrodes via an impedance matching network and a co-axial electrical low inductance transmission line feed-through sealed to the enclosure. The feed-trough includes two spring contacts which are configured to be spring compression push-fit in grooves in edges of the discharge-electrodes. A central conductor of the feed-through is fluid cooled. A capacitor of the impedance matching network is assembled on the central conductor as an integral part of the feed-trough.
    Type: Application
    Filed: September 19, 2011
    Publication date: February 9, 2012
    Applicant: Coherent, Inc.
    Inventors: Leon A. NEWMAN, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
  • Patent number: 7965757
    Abstract: A laser mirror assembly is disclosed with improved pointing stability. An elongated mirror includes a concave reflecting portion. A pair of elongated planar portions extend parallel to the concave reflecting portion on either side thereof. The planar portions are stepped down from the reflecting portion. The mirror is formed from copper. A pair of stainless steel strips are connected to planar portions. The bimetallic effect between the copper mirror and the stainless steel strips operates to counteract the warping of the mirror due to differential heating effects which arise during operation. In an alternate embodiment, a pair of aluminum strips are mounted on the rear surface of the mirror.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: June 21, 2011
    Assignee: Coherent, Inc.
    Inventors: Leon A. Newman, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
  • Patent number: 7756186
    Abstract: Through the use of a relatively inexpensive third mirror on a novel folded hybrid unstable resonator configuration, the optimum output coupling for a given laser design can be explored quickly and easily with a minimum of intracavity mirror alignment. No changes in either the radii of curvature of the three cavity optics or their spacing are required for this exploration. In addition to providing techniques for purposefully and systematically introducing mirror edge effects or avoiding edges effects altogether, the invention provides that output beams of different width can be advantageously explored in a relatively simple and straightforward manner. The invention provides that higher geometric magnification cavity designs may be made compatible with low diffraction output coupling in a configuration that uses only three totally reflecting optics.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: July 13, 2010
    Assignee: Coherent, Inc.
    Inventors: Peter P. Chenausky, Lanny Laughman, Eric R. Mueller, Leon A. Newman, Vernon A. Seguin, Christian J. Shackleton
  • Patent number: 7756182
    Abstract: The laser tube housing of a CO2 slab laser is provided with a cooling system in which coolant fluid tubes are inserted into hollowed out portions formed in the longitudinal sidewalls of the laser tube housing; mounting the coolant fluid tubes in this way provides for enhanced cooling and increased stiffness of the laser tube housing. Also, a cooling system is provided for the laser's electrode assembly that relies on a manifold system that is mounted on a longitudinal sidewall of the laser tube housing to route coolant fluid through the sidewall to the electrode assembly; sidewall flow of the coolant fluid enables the end flanges of the laser tube housing to be remove without disturbing either the electrodes or the optical resonator of the laser.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: July 13, 2010
    Assignee: Coherent, Inc.
    Inventors: Leon A. Newman, Christian J. Shackleton, Adrian Papanide
  • Publication number: 20100172042
    Abstract: A mirror assembly for a carbon dioxide (CO2) slab laser resonator includes a center section having a rectangular cross-section and a pair of thermal balancing bars. A concave reflecting surface formed on a front edge of a center section. The side-bars are attached to either side of the center section and extend forward of the reflective surface. Dimensions of the center section and side bars are selected to position the thermal neutral plane of the assembly close to the reflective surface. This minimizes changes the radius of curvature of the reflective surface due to heating by circulating radiation in the resonator.
    Type: Application
    Filed: May 12, 2009
    Publication date: July 8, 2010
    Applicant: Coherent, Inc.
    Inventors: Adrian PAPANIDE, Leon A. Newman, Lanny Laughman
  • Publication number: 20100118901
    Abstract: A carbon-dioxide (CO2) gas-discharge slab laser includes elongated discharge-electrodes in a sealed enclosure. Radio Frequency (RF) power is supplied to the electrodes via an impedance matching network and a co-axial electrical low inductance transmission line feed-through sealed to the enclosure. The feed-trough includes two spring contacts which are configured to be spring compression push-fit in grooves in edges of the discharge-electrodes. A central conductor of the feed-through is fluid cooled. A capacitor of the impedance matching network is assembled on the central conductor as an integral part of the feed-trough.
    Type: Application
    Filed: June 9, 2009
    Publication date: May 13, 2010
    Applicant: Coherent, Inc.
    Inventors: Leon A. Newman, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
  • Publication number: 20100103974
    Abstract: A laser mirror assembly is disclosed with improved pointing stability. An elongated mirror includes a concave reflecting portion. A pair of elongated planar portions extend parallel to the concave reflecting portion on either side thereof. The planar portions are stepped down from the reflecting portion. The mirror is formed from copper. A pair of stainless steel strips are connected to planar portions. The bimetallic effect between the copper mirror and the stainless steel strips operates to counteract the warping of the mirror due to differential heating effects which arise during operation. In an alternate embodiment, a pair of aluminum strips are mounted on the rear surface of the mirror.
    Type: Application
    Filed: December 31, 2009
    Publication date: April 29, 2010
    Applicant: Coherent, Inc.
    Inventors: Leon A. NEWMAN, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
  • Patent number: 7664159
    Abstract: A laser mirror assembly is disclosed with improved pointing stability. An elongated mirror includes a concave reflecting portion. A pair of elongated planar portions extend parallel to the concave reflecting portion on either side thereof. The planar portions are stepped down from the reflecting portion. The mirror is formed from copper. A pair of stainless steel strips are connected to planar portions. The bimetallic effect between the copper mirror and the stainless steel strips operates to counteract the warping of the mirror due to differential heating effects which arise during operation. In an alternate embodiment, a pair of aluminum strips are mounted on the rear surface of the mirror.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: February 16, 2010
    Assignee: Coherent, Inc.
    Inventors: Leon A. Newman, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
  • Patent number: 7605673
    Abstract: An RF impedance-matching transformer for matching the output impedance of an RF amplifier to the discharge of a gas-discharge laser includes upper and lower dielectric plates arranged face-to-face and bonded together. A primary U-shaped strip winding is embedded in the bonded surface of one of the dielectric plates. A secondary strip-winding is formed on an exposed surface of the upper dielectric plates. A ground-plane electrode formed on an exposed surface of the lower dielectric plate. An electrical connector connects one end of the secondary strip-winding to the ground-plane electrode via a via-hole extending through the dielectric plates. The other end of the secondary strip-winding can be connected to the laser.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: October 20, 2009
    Assignee: Coherent, Inc.
    Inventors: W. Shef Robotham, Jr., Frederick W. Hauer, Leon A. Newman
  • Patent number: 7540779
    Abstract: A RF shielded, series inductor, high power impedance matching network interconnector is provided for connecting an RF power supply to electrodes contained in the shielded, hermetically sealed laser tube housing of a slab laser system. The impedance matching interconnector comprises a short length of co-axial conductor and an impedance matching network that includes two L shaped networks. The inner conductor of the co-axial conductor is connected between the power supply output and the impedance matching network. The outer conductor of the co-axial conductor is grounded. The co-axial conductor has an impedance characteristic to match the power supply output impedance. The first L-shaped network includes a first inductor having a first end connected to the inner conductor of the co-axial conductor and a first capacitor connected to the second end of the first inductor and a second plate connected to ground.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: June 2, 2009
    Assignee: Coherent, Inc.
    Inventors: Adrian Papanide, Frederick W. Hauer, Leon A. Newman, Thomas V. Hennessey, Jr., Christian J. Shackleton, Joel Fontanella, Gongxue Hua
  • Patent number: 7508850
    Abstract: The quality of pulses output from laser systems such as super-pulsed CO2 slab lasers can be improved using half-wavelength electro-optic modulators (EOMs), in combination with thin film polarizers (TFPs). A voltage applied across a CdTe crystal of the EOM rotates the polarization of a pulse passing through the EOM by 90°. The polarization determines whether the pulse passes through, or is redirected by, the TFP. The voltage applied to the crystal can be pulsed to prevent a drop in charge, which could allow radiation to leak to the application. A totem pole switch used to apply voltage to the EOM can receive a pulsed voltage for improved performance. Directing by the EOM allows pulses to be clipped at the front/back end(s), split into portions, and/or directed to separate scanners. Directing pulses or pulse portions to different scanners can increase the output of systems such as hole drilling systems.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: March 24, 2009
    Assignee: Coherent, Inc.
    Inventors: Leon A. Newman, John Kennedy, Joel Fontanella, Phillip J. Gardner
  • Publication number: 20090034577
    Abstract: A laser mirror assembly is disclosed with improved pointing stability. An elongated mirror includes a concave reflecting portion. A pair of elongated planar portions extend parallel to the concave reflecting portion on either side thereof. The planar portions are stepped down from the reflecting portion. The mirror is formed from copper. A pair of stainless steel strips are connected to planar portions. The bimetallic effect between the copper mirror and the stainless steel strips operates to counteract the warping of the mirror due to differential heating effects which arise during operation. In an alternate embodiment, a pair of aluminum strips are mounted on the rear surface of the mirror.
    Type: Application
    Filed: July 7, 2008
    Publication date: February 5, 2009
    Inventors: Leon A. Newman, Vernon A. Seguin, Lanny Laughman, Adrian Papanide
  • Publication number: 20090004918
    Abstract: A RF shielded, series inductor, high power impedance matching network interconnector is provided for connecting an RF power supply to electrodes contained in the shielded, hermetically sealed laser tube housing of a slab laser system. The impedance matching interconnector comprises a short length of co-axial conductor and an impedance matching network that includes two L shaped networks. The inner conductor of the co-axial conductor is connected between the power supply output and the impedance matching network. The outer conductor of the co-axial conductor is grounded. The co-axial conductor has an impedance characteristic to match the power supply output impedance. The first L-shaped network includes a first inductor having a first end connected to the inner conductor of the co-axial conductor and a first capacitor connected to the second end of the first inductor and a second plate connected to ground.
    Type: Application
    Filed: March 19, 2008
    Publication date: January 1, 2009
    Inventors: ADRIAN PAPANIDE, Frederick W. Hauer, Leon A. Newman, Thomas V. Hennessey, JR., Christian J. Shackleton, Joel Fontanella, Gongxue Hua
  • Publication number: 20080240183
    Abstract: The laser tube housing of a CO2 slab laser is provided with a cooling system in which coolant fluid tubes are inserted into hollowed out portions formed in the longitudinal sidewalls of the laser tube housing; mounting the coolant fluid tubes in this way provides for enhanced cooling and increased stiffness of the laser tube housing. Also, a cooling system is provided for the laser's electrode assembly that relies on a manifold system that is mounted on a longitudinal sidewall of the laser tube housing to route coolant fluid through the sidewall to the electrode assembly; sidewall flow of the coolant fluid enables the end flanges of the laser tube housing to be remove without disturbing either the electrodes or the optical resonator of the laser.
    Type: Application
    Filed: March 26, 2008
    Publication date: October 2, 2008
    Inventors: Leon A. Newman, Christian J. Shackleton, Adrian Papanide