Todd E Lizotte

US Patent:

6420675, Jul 16, 2002

Filed:

Mar 31, 2000

Appl. No.:

09/540366

Inventors:

Todd E. Lizotte - Manchester NH
Orest Ohar - Hooksett NH
Sunny Collar Waters - Chester Springs PA

Assignee:

Nanovia, LP - Londonderry NH

International Classification:

B23K 2606

US Classification:

2191217, 21912183, 21912173

Abstract:

An control system for controlling movement of a product to be imaged relative to a laser and operation of a laser. The control system comprises a mechanism for obtaining drill position data from a data storage device. The control system further includes a mechanism for simultaneously sending necessary signals to alter a path of a laser beam emitted by the laser relative to the object to be imaged. The control system further includes a mechanism for providing a feedback to indicate that the path laser beam, from the laser to the product to be imaged, is suitably altered. The control system further includes a mechanism for firing the laser beam for one of burning, drilling or forming a desired formation in a surface of the object to be imaged. The control system further includes a mechanism for returning the control system, when necessary, for reading further drill position data from the data storage device.

US Patent:

6653593, Nov 25, 2003

Filed:

Jun 26, 2002

Appl. No.:

10/183806

Inventors:

Todd E. Lizotte - Manchester NH
Orest Ohar - Hooksett NH

Assignee:

NanoVia, LP - Londonderry NH

International Classification:

B23K 2636

US Classification:

2191217

Abstract:

A laser beam delivery system for ablating a desired array of features in an object to be processed. The imaging system comprises a laser, a shaping apparatus for shaping the laser beam into a plurality of separate laser beams, first and second repeat positioners for redirecting the beams, a converging mechanism for converging the laser beams through a clear aperture of a reflective mirror of the first repeat positioner, and a focusing member for focusing the laser beams at a desired one of a plurality of holographic imaging segments. Each one of the holographic imaging segments, comprising the holographic imaging lens, forms a desired formation in a surface of the object to be processed. A number of the components are housed within a rotatable module and a rotational drive is connected to the rotatable module to facilitate rotation thereof relative to the optical axis.

US Patent:

6804269, Oct 12, 2004

Filed:

Jun 4, 2002

Appl. No.:

10/162944

Inventors:

Todd E. Lizotte - Manchester NH
Orest Ohar - Hooksett NH

Assignee:

Hitachi Via Mechanics, Ltd. - Ebina

International Classification:

H01S 310

US Classification:

372 9, 372100, 372101

Abstract:

A laser beam delivery system for supplying a laser beam to a computer generated hologram which shapes and divides the supplied laser beam into a plurality of pseudo flat top laser beams. The plurality of pseudo flat top laser beams are then passed through collimated optics which alter the beams so that the beams are conveyed along the optical axis in a parallel manner. The plurality of collimated laser beams then passes through a converging mechanism which facilitates converging of the plurality of separated collimated laser beams through a clear aperture of a mirror of a first repeat positioning device so that all of the light is received by the repeat positioning device and appropriately reflected thereby to a second mirror of a second repeat positioning device and then to a rear surface of an F-Theta lens. The F-Theta lens focuses the plurality of separated collimated laser beams at the object to be processed. The converging mechanism facilitates converging of all of the supplied light so that substantially all of the supplied light passes through the clear aperture(s) of the repeat positioning device(s).

US Patent:

6833911, Dec 21, 2004

Filed:

Feb 21, 2003

Appl. No.:

10/372459

Inventors:

Todd E. Lizotte - Manchester NH

Assignee:

Identification Dynamics, Inc. - Pottstown PA

International Classification:

G06K 974

US Classification:

356 71

Abstract:

Identification of firearms by illuminating a base of a fired cartridge from a firearm using axially homogenized light from various illumination angles using a holographic imaging system integrated into either a mono-chromatic or multi-chromatic light, obtaining a microscope image of an encoded hologram or encoded alphanumeric code or barcodes or indicia that form unique impressions on a primer of the cartridge or bullet; and utilizing specialized analysis software to read the encoded codes and provide the serial number or tracking number unique to the firearm that fired the bullet or cartridge.

US Patent:

6853489, Feb 8, 2005

Filed:

Apr 10, 2003

Appl. No.:

10/411570

Inventors:

Todd E. Lizotte - Manchester NH, US

Assignee:

Hitachi Via Mechanics, Ltd. - Ebina

International Classification:

G02F001/01
G02B027/64
G02B027/10
G02B027/30

US Classification:

359618, 359641, 359288, 359554

Abstract:

A laser correction element for the correction of angular deviation due to pointing instability and radial displacement due to thermal drift, including one or more of an angular deviation non-symmetric optical element for redirecting a beam axis of a laser beam through a first corrective angle dependent upon the angle of incidence of the laser beam on the angular deviation element to be parallel with an optimum centerline and a radial displacement non-symmetric optical element for redirecting a beam axis of a laser beam through a second corrective angle dependent upon a radial displacement of the beam axis. A collimating non-symmetric optical element may redirect the laser beam through a third corrective angle dependent on radial displacement of the beam axis from a centerline and angle of incidence on the collimating element.

US Patent:

6884962, Apr 26, 2005

Filed:

Mar 11, 2003

Appl. No.:

10/385801

Inventors:

Todd E. Lizotte - Manchester NH, US

Assignee:

Hitachi Via Mechanics, Ltd. - Ebina

International Classification:

B23K026/06

US Classification:

21912173, 2191217

Abstract:

An improved beam for use in ablating a surface to be processed. The improved beam front has a profile with a plurality of undulation and the plurality of undulations define a plurality of annular peaks and annular valleys. An intensity of each annular peak is about 10 percent greater than an intensity of each annular valley whereby the undulation of the improved beam facilitates formation of a substantially uniform feature in the surface to be processed. A method of utilizing an improved beam to form the desired feature in a surface to be processed is also disclosed. To reduce energy losses, a fourier transform is performed on the supplied laser beam. Before striking the surface, this beam passes through a focusing lens which performs a reverse fourier transform and retransforms the wave front substantially back to its originally wave form and intensity.

US Patent:

6886284, May 3, 2005

Filed:

Aug 29, 2002

Appl. No.:

10/232766

Inventors:

Todd E. Lizotte - Manchester NH, US

Assignee:

Identification Dynamics, LLC - Pottstown PA

International Classification:

F41A021/12

US Classification:

42 101, 42 7601, 89 1405

Abstract:

A firearm comprising a gun barrel for accommodating a desired round of ammunition having a bullet, a shell casing and a primer. The gun barrel has a firing pin associated with a chamber of the gun barrel and the firing pin is activated by a trigger assembly. When the firing pin is activated by the trigger assembly, a striking surface of the firing pin strikes the primer and discharges the round of ammunition to propel the bullet out of the opposite end of the gun barrel. The firing pin, the interior surface of the barrel, or some other surface which contacts the shell casing carries a unique identifying indicia. Upon discharge of the round of ammunition, the component of the firearm carrying the unique identifying indicia transfers an impression of the unique identifying indicia to an exterior surface of the shell casing to identify that the shell casing was discharged by that firearm.

US Patent:

6909735, Jun 21, 2005

Filed:

Apr 10, 2003

Appl. No.:

10/411571

Inventors:

Todd E. Lizotte - Manchester NH, US
Orest Ohar - Hooksett NH, US

Assignee:

Hitachi Via Mechanics, Ltd. - Ebina

International Classification:

H01S003/00
G02B026/08

US Classification:

372109, 359196, 359223, 359225, 359226, 359618, 359629

Abstract:

A laser process system with multiple, independently steerable laser beamlets and including a laser and beam shaper for generating a shaped source beam, a splitter stage for generating a plurality of beamlets from the shaped source beam, a beamlet controller including an independently steerable beamlet steering mirror for and corresponding to each beamlet for independently directing the corresponding beamlet, a mirror controller for controlling each beamlet steering mirror, and an optical path including a scanning lens for directing each steered beamlet to a target area of a workpiece. Each beamlet steering mirror is a multi-axis micro-electro-mechanical mirror and the system further includes a beam dump located in the optical path for intercepting a beamlet steered into the beam dump by the corresponding beamlet steering mirror.