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Professional Experience


Professional Experience

2006-Present Senior Scientist/Illumination, Optical Research Associates
1996-2005
Senior Systems Engineer/Illumination, Optical Research Associates
1992-1996
Optical Scientist, GE Lighting
1991-1992
Technical Staff, GE Corporate Research and Development
1987-1991
Electro-Optic Engineer, GE Astro-Space
1985-1987
Advanced Course Supervisor, GE Astro-Space
1983-1985
Edison Engineer, GE Electronics Laboratory & GE Astro-Space


Education

1990
Ph.D., Degree in Electrical Engineering, University of Pennsylvania
1982
BSEE, Degree in Electrical Engineering (plus Math Minor), Bucknell University

He is a driving force in the movement to create the field of computer-aided illumination engineering. His
efforts include illumination optimization, illumination engineering consulting, numerous papers and
invited talks, educational course development, and intellectual property development. Some highlights of
his efforts include two SPIE illumination courses, submitting the winning solution for the 2006 IODC
Illumination Design Problem, and authoring a chapter in the OSA Handbook of Optics on Illumination
Engineering. In addition, he is the inventor on 33 US patents and 15 patents pending, the optics
developer for the TIROS lens for LED flashlights, and a key contributor to major feature development in
LightTools
®
, including the recent first in the industry introduction of a practical and effective
optimization environment for illumination systems.

He has worked extensively in the areas of illumination modeling, design, and optimization. Areas of
special emphasis include; etendue limited systems, non-imaging optics, LED optics, backlights, lightpipe
systems, high brightness LED and discharge source development, photometry, and lens-reflector design.
Systems he has designed and which have been demonstrated include: fiber optic headlights, compound
parabolic concentrators, fiber optic systems, laser illuminators, light pipe systems, theater projection
illuminators, video projection illuminators, room lighting, informational signs, spotlights, floodlights, and
UV systems. He has developed optics for halogen infrared, ceramic metal halide, standard metal halide,
halogen, and electrodeless lamp products.

He joined the research staff of GE Corporate Research and Development in 1991, continuing as Principle
Investigator for the Phase-Integrated-Laser-Optic-Transmitter program that was started at GE Astro-
Space. Primary areas of research included non-imaging optics, laser diode arrays, liquid crystal devices,
coherent wavefront control, and flame spectroscopy. He also won a position on the Bridge Program, a
GE CRD technology transfer program. While at GE, he received numerous GE management awards for
patents and product introduction efforts.

He obtained his Ph.D. with a dissertation focused on liquid crystal arrays for signal processing and
coherent wavefront control while working at GE Astro-Space. GE research focused on liquid crystal
phase control arrays for laser communication systems, liquid crystal device development, intra-cavity
laser diode wavefront correction, and Fourier optic mathematics.

His career with GE began in the Edison Engineering program, with assignments in space radiation effects,
signal processing communication systems, and speech wavefront analysis. Following this, he supervised
an advanced course in engineering at GE Astro-Space, a Masters in Engineering training program for top
GE Engineers, where he was responsible for teaching more than 30 people each year.


Awards/Honors

2006 Winner of 2006 International Optical Design Conference Illumination Design Problem.
2004 Commendation for Excellence in Technical Writing from Laser Focus World
1994 GE Lighting General Manager Award for XMH60 Product Development.
1990 GE Astro-Space Technical Excellence Award for significant technical contributions.
1988 GE Corporate D. R. Mack Advanced Course Supervisor Award for demonstrated leadership.


Patents

U.S. 6,864,861
Image generator having a miniature display device
U.S. 6,819,505
Internally reflective ellipsoidal collector with projection lens
U.S. 6,488,389
Image generator having an improved illumination system
U.S. 6,280,054
Image generator having an improved illumination system
U.S. 6,220,740
High efficiency dual output light source
U.S. 6,219,480
Optical coupler for coupling light between one and a plurality of light ports
U.S. 6,192,176
Compact optical system with turn and color mixing
U.S. 5,927,849
Low angle, dual port light coupling arrangement
U.S. 5,924,792
Modular dual port central lighting system
U.S. 5,896,004
Double ended quartz lamp with end bend control
U.S. 5,877,681
System and method for broadcasting colored light for emergency signaling
U.S. 5,842,765
Tricolor lighting system
U.S. 5,826,963
Low angle, dual port light coupling arrangement
U.S. 5,812,713
Optical coupling system with bend
U.S. 5,774,608
Optical coupling systems with bend
U.S. 5,692,091
Compact optical coupling systems
U.S. 5,691,696
System and method for broadcasting colored light for emergency signals
U.S. 5,675,677
Lamp-to-light guide coupling arrangement for an electrodeless high intensity

discharge lamp
U.S. 5,664,863
Compact uniform beam spreader for a high brightness centralized lighting system
U.S. 5,654,610
Electrodeless discharge lamp having a neon fill
U.S. 5,636,915
High brightness projection lighting system
U.S. 5,567,031
High efficiency dual output light source
U.S. 5,563,977
Display system having greyscale control of fiber optic delivered light output
U.S. 5,560,699
Optical coupling arrangement between a lamp and a light guide
U.S. 5,515,243
Retrofit optical assembly for lighting system
U.S. 5,469,337
Multiple port high brightness centralized lighting system
U.S. 5,420,769
High temperature lamp assembly with improved thermal management properties
U.S. 5,317,484
Collection optics for high brightness discharge light source
U.S. 5,107,357
Low insertion loss optical beam steerer
U.S. 5,059,008
Wide angle beam steerer using translation of plural lens arrays
U.S. 5,015,080
Continuous wide angle beam steerer using lens translation and phase shifter
D 508,510
Optical Lens (To Be Reissued)
D 511,787
Optical Lens (To Be Reissued)



Patents Pending

16 U.S. Patent applications on Lighting Sources and/or Optics



Publications

Design of Efficient Illumination Systems, SPIE Short Course presented 2-3 times per year starting July
1999. (Also available in CD-ROM format)

Light Source Modeling, SPIE Short Course presented 1-2 times per year starting (January 2000).

Rippled Mixers for Uniformity, Illumination Technical Group talk, SPIE Annual, (August 2006).

Optimizing density patterns to achieve desired light extraction for displays, (with T. Davenport),
International Optical Design Conference, Proc. SPIE 6342, (June 2006).

Non-rotationally symmetric mixing rods, (with T. Davenport), International Optical Design
Conference, Proc. SPIE 6342, (June 2006).

"Automotive Interior Lighting System Design and Optimization," (with J. Li and M. Hayford),
Transactions of the Society of Automotive Engineers of Japan, 36, 5, 217-222, (September 2005).

Optimizing angle-to-area-converting, light-piping systems using surface features, (with T. Davenport
and T. Hough), Proc. SPIE 5942, (August 2005).

LED Source Modeling, Strategies in Light Workshop, (February 7, 2005).

Noise tolerant illumination optimization applied to display devices, (with B. Irving), Proc. SPIE 5638,
(February 2005).

Automated Optimization Advances Software for Illumination Design, Laser Focus World, (November
2004).Optimization for efficient angle-to-area conversion in illumination systems, (with T. Davenport
and T. Hough), Proc. SPIE 5524, (October 2004).

Better Illumination Design Through Automated Optimization, (with T. Hough and T. Davenport),
Photonics Spectra, (October 2004).

Optimization for illumination systems: the next level of design, (with T. Davenport and T. Hough),
Proc. SPIE 5456, (September 2004).

Taming light using nonimaging optics, Invited paper, Proc. SPIE 5185, (January 2004).

The art of making efficient illuminator design fun, Invited paper, Proc. SPIE 5186, (November 2003).

From Out of the Dark: Fun Illumination Demonstrations, Invited OSA Talk, (October 6, 2003).
Taming Light, OE Magazine, 16-18, (December 2002).

Illumination Optimization: The Revolution Has Begun, (with M. Hayford), International Optical
Design Conference, Proc. SPIE 4832, (December 2002).

LED Modeling: Pros and Cons of Common Methods, Photonics Tech Briefs, NASA Tech Briefs, IIa
2a, (April 2002).
"Accurate Illumination System Predictions Using Measured Spatial Luminance Distributions," (with
D. J