David A Schultz

Address:

218 E Main St, Beaver Dam, WI 53916

Phone:

9208873064

VIN:

1HD1HFZ197K802376

Make:

Cadillac

Model:

Escalade ESV AWD 4dr

Year:

2007

US Patent:

63134330, Nov 6, 2001

Filed:

Apr 3, 2000

Appl. No.:

9/542490

Inventors:

Yefim P. Sukman - Scottsdale AZ
Christian J. Risser - Scottsdale AZ
Edwin W. Gorham - Phoenix AZ
David W. Schultz - Phoenix AZ

Assignee:

Universal Laser Systems, INC - Scottsdale AZ

International Classification:

B23K 2606
B23K 2638

US Classification:

21912167

Abstract:

A computer controlled laser material processing system has a plurality of laser sources the beams of which are selectively operable between two modes. In a first raster engraving mode the beams are separated and independently controllable in synchronism with the motions of a beam delivery system to form plural, parallel, spaced apart scan lines on the surface of the workpiece for affecting the surface at high speed. In a second vector cutting mode the beams are combined such that they are collinear and have a power approximately equal to the sum of the powers of each individual laser source for cutting the surface at high power. The system may be switched by moving an optical element which, in the vector mode position, combines the beams and, in the raster mode position, separates the beams by either incrementally adjustably controlling the beams to provide a predetermined pitch between the scanned lines or by fixedly establishing a predetermined angle between the beams coupled with scanning in a variable interleaved pattern to achieve the desired pitch and image quality. Alternatively, an optical element may be inserted in the path of the collinear beams to separate them into parallel or angled beams for use in multi line scanning in the raster mode. The reverse sequence is followed to switch from raster to vector mode.

US Patent:

61817198, Jan 30, 2001

Filed:

Nov 24, 1998

Appl. No.:

9/198910

Inventors:

Yefim P. Sukhman - Scottsdale AZ
Mikhail E. Ryskin - Phoenix AZ
David W. Schultz - Phoenix AZ
George M. Mavroleon - Fountain Hills AZ

Assignee:

Universal Laser Systems, Inc. - Scottsdale AZ

International Classification:

H01S 300

US Classification:

372 381

Abstract:

A gas laser RF power supply has two RF oscillators operating at different frequencies, the first frequency to provide maximum RF voltage to the plasma tube prior to ignition, and the second frequency to provide optimum power for sustaining CW or pulse operation of the laser. The oscillator outputs are modulated to control power to the tube, the one in the form of RF pulses at the first frequency and at a power level below the laser emission threshold, and the other in CW or pulse form at the second frequency at a laser gas medium excitation level above the laser emission threshold. The first frequency is the resonance frequency of the tube prior to plasma ignition and the frequency of minimum average RF power required for a reliable ignition. The second frequency is the most efficient operating frequency for the plasma ignited and kept ionized by the pulses of the first frequency and provides maximum output laser power. The pulses of the first frequency have a width, repetition rate, and amplitude sufficient to obtain a reliable ignition and sustain a level of the laser gas medium excitation below the laser emission threshold and are also adjustable to compensate for variations in the laser emission threshold for a particular tube-resonator combination.