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 source development, photometry, light pipe systems, non-imaging optics, lens-reflector design, multi-layer thin films, source-reflector alignment, and asymmetric light distribution patterns using fibers as the source. 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. Fibers he has worked with include glass, glass bundles, coherent bundles, incoherent bundles, PMMA, large core light pipes, and hollow light pipes. While at GE, he received numerous GE management awards for patents and product introduction efforts. |
| 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. |
| 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. |
| U.S. 6,864,861 |
Image generator having a miniature display device with K. Schehrer, D. McKnight, R. Hudyma, J. Biles, M. Schuck and K. Armagost |
| U.S. 6,819,505 |
Internally reflective ellipsoidal collector with projection lens with R. Galli |
| U.S. 6,488,389 |
Image generator having an improved illumination system with M. Schuck |
| U.S. 6,280,054 |
Image generator having an improved illumination system (co-inventor) |
| U.S. 6,220,740 |
High efficiency dual output light source (co-inventor) |
| U.S. 6,219,480 |
Optical coupler for coupling light between one and a plurality of light ports (co-inventor) |
| U.S. 6,192,176 |
Compact optical system with turn and color mixing (co-inventor) |
| U.S. 5,927,849 |
Low Angle, Dual Port Light Coupling Arrangement (co-inventor) |
| U.S. 5,924,792 |
Modular Dual Port Central Lighting System (co-inventor) |
| U.S. 5,896,004 |
Double Ended Quartz Lamp with End Bend Control (co-inventor) |
| U.S. 5, 877, 681 |
System and Method for Broadcasting Colored Light for Emergency Signalling (co-inventor) |
| U.S. 5,842,765 |
Tricolor Lighting System (co-inventor) |
| U.S. 5,826,963 |
Low Angle, Dual Port Light Coupling Arrangement
(co-inventor) |
| U.S. 5,812,713 |
Optical Coupling Systems with Bend (co-inventor) |
| U.S. 5,774,608 |
Optical Coupling Systems with Bend (co-inventor) |
| U.S. 5,692,091 |
Compact Optical Coupling Systems (co-inventor) |
| U.S. 5,691,696 |
System and Method for Broadcasting Colored Light for Emergency Signals (co-inventor) |
| U.S. 5,675,677 |
Lamp-to-Light Guide Coupling Arrangement for an Electrodeless High Intensity Discharge Lamp (co-inventor) |
| U.S. 5,664,863 |
Compact Uniform Beam Spreader for a High Brightness Centralized Lighting System (co-inventor) |
| U.S. 5,654,610 |
Electrodeless Discharge Lamp Having a Neon Fill (co-inventor) |
| U.S. 5,636,915 |
High Brightness Projection Lighting System (co-inventor) |
| U.S. 5,567,031 |
High Efficiency Dual Output Light Source (co-inventor) |
| U.S. 5,563,977 |
Display Systems Having Greyscale Control of Fiber Optic Delivered Light Output (co-inventor) |
| U.S. 5,560,699 |
Optical Coupling Arrangement between a Lamp and Light Guide (co-inventor) |
| U.S. 5,515,243 |
Retrofit Optical Assembly for Lighting Systems (co-inventor) |
| U.S. 5,469,337 |
Multiple Port High Brightness Centralized Lighting System (co-inventor) |
| U.S. 5,420,769 |
High Temperature Lamp Assembly with Improved Thermal Management Properties (co-inventor) |
| U.S. 5,317,484 |
Collection Optics for High Brightness Discharge Light Source (co-inventor) |
| U.S. 5,107,357 |
Low Insertion Loss Optical Beam Steerer (co-inventor) |
| U.S. 5,059,008 |
Wide Angle Beam Steerer Using Translation of Plural Lens Arrays (co-inventor) |
| U.S. 5,015,080 |
Continuous Wide Angle Beam Steerer Using Lens Translation and Phase Shifter (co-inventor) |
"Design of Efficient Illumination Systems," SPIE Short Course presented 2-3 times per year starting July 1999. |
| "Light Source Modeling," SPIE Short Course presented approximately 2 times per year starting Jan. 2000. |
| "Design of Efficient Illumination Systems," SPIE Short Course presented approximately 3 times per year starting July 1999. |
| "Lightpipes: Hidden Devices That Light Our World," (with A. Gupta, D. Jenkins, and J. Koshel), Vol. 12, No. 8, 2001. |
| "Dissecting the Optics of an LED," University of Arizona Optical Sciences Colloquium, April 26, 2001. |
| "Analysis of Single Lens Arrays Using Convolution," (with A. P. Riser), Optical Engineering, Vol. 40, No. 5, pp. 805-813, 2001 (also presented orally at SAE, 2000.) |
| "Automated Design of a Uniform Distribution Using Faceted Reflectors," (with T. L. Davenport, S. R. David, D. G. Jenkins, and A. P. Riser), Optical Engineering, Vol. 39, No. 7, pp. 1830-1839, 2000. (also, presented orally at SAE, 2000) |
| "Optimization Methods for Illuminators for sub-100nm Lithography" (with K. Thompson, T. Kuper, J. McGuire, T. Davenport, R. Shack), DARPA Advanced Lithography conference, Oral Presentation, May 2000. |
| "Fiber Optic Lighting: The Transition from Specialty Applications to Mainstream Lighting," (with J. M. Davenport), SAE, 1999, Paper No. 1999-01-0304. |
| "Advances in Fiber Optics: Fiber Applications Move into the Mainstream," (with J.M. Davenport), Invited Paper to be published, The 8th International Symposium on the Science and Technology of Light Sources (LS-8), Sept 1998. |
| "Faceted Reflector Design for Uniform Illumination," (with S. R. David and C. T. Walker), Presented at IODC Conference, Kona, Hawaii, SPIE Proceedings, Vol. 3482, 1998. |
| "Computer Software Tools Used in Illumination System Design," Invited Oral Presentation, SAE International Congress and Exposition, 1998. |
| "Changes in Angular and Spatial Distribution Introduced into Fiber Optic Headlamp Systems by the Fiber Optic Cables," (with T. L. Davenport, R. L. Hansler, T. E. Stenger, G. R. Allen, and R. F. Buelow), Presented at SAE International Congress and Exposition, 1998, Paper No. 981197. |
| "Illumination System Design Using Optical Solid Modeling Software," (with M. J. Hayford),. Invited Oral Presentation, OSA Annual Meeting, 1997. |
| "Comparison of Dual Focus Collector Schemes for Fiber Systems," (with T. L. Davenport, R.L. Hansler, and G. R. Allen), Presented at SAE International Congress and Exposition, 1997, Paper No. 970254. |
| "Uniform Light Delivery Systems," (with J. M. Davenport, and R. L. Hansler), Presented at SAE International Congress and Exposition, 1996, Paper No. 960490. |
| "Distributed Lighting Systems: Uniform Light Delivery," (with J. M. Davenport and R. L. Hansler), SAE Internat’l Congress, Book SP-1081, SAE Transaction Vol. 104, Section 6, 1995, Paper No. 950904. |
| "High Power Coherent Two-dimensional Semiconductor Laser Array," (with J. C. Ehlert, J. M. Finlan, K. M. Flood, D. W. Nam, Sanders, D. R. Scifres, R. G. Waarts, D. F. Welch), Applied Physics Letters, Vol. 64, No. 12, p. 1478, 1994. |
| "Automated Phase Sensing and Control of an External Talbot Cavity Laser Diode Array Using Phase Contrast Imaging," (with J. C. Ehlert, S. H. Chakmakjian, J. M. Finlan, and K. M. Flood), Applied Optics, Vol. 33, No. 24, p. 5550, 1994. |
| "Automated Two-Dimensional Phase Sensing and Control Using Phase Contrast Imaging," (with J.C. Ehlert, S.H. Chakmakjian, D. Harnesberger, J.M. Finlan, K.M. Flood, R.G. Waarts, D.W. Nam, D.F. Welch), SPIE, Vol. 1634, p. 299, 1992. |
| "Semiconductor Laser Array in an External Talbot Cavity," (with R.G. Waarts, D.W. Nam, D.F. Welch, D. Mehuys, J.C. Ehlert, J.M. Finlan, K.M. Flood), SPIE, Vol. 1634, p. 288, 1992. |
| "Intracavity Phase Correction of an External Talbot Cavity Laser Using Liquid Crystals," (with J.C. Ehlert, J.M. Finlan, K.M. Flood, and R. Waarts), Optics Letters, Vol. 17, p. 607, 1992. |
| "Liquid Crystal Inversion Wall Caused by Field Fringing," (with S.J. Young), Mol Cryst. Liq. Cryst., Vol. 210, p. 1, 1992. |
| "900 mW, CW Nearly Diffraction-Limited Output From a GaAIAs Semiconductor Laser Array in an External Talbot Cavity," (with R.G. Waarts, D. Mehuys, D.W. Nam, D.F. Welch, D.R. Scifres, W. Streifer, J.C Ehlert, J.M. Finlan, K.M. Flood), presented at CLEO-CWE7, May 1991. |
| "Low Insertion Loss High Precision Liquid Crystal Optical Phased Array," (with J.C. Ehlert, and D.J. Henry), SPIE, Vol. 1417, p. 110, 1991. |
| "A Nematic Liquid Crystal Phase and Amplitude Spatial Light Modulator for Optical Signal Processing Application," Ph.D. Dissertation, University of Pennsylvania, July 1990. |
| "Continuous Wide Angle Beam Steering Using Translation of Binary Microlens Arrays and a Liquid Crystal Phased Array," (with K.M. Flood, C. Sigg, and J.M. Finlan), SPIE, Vol. 1211, p. 296, 1990. |
| "Aperture Filling Using Phase-Plates at Self-Imaging Planes," (with J.M. Finlan), Post Deadline Paper OSA Annual Meeting, 1989. |
| "Phase Control of Coherent Diode Laser Arrays Using Liquid Crystals," (with J.M. Finlan, M. DeJule, and C. Stein), SPIE, Vol. 1043, p. 130, 1989. |
| "Effect of Word-Length Truncation on Quantized Gaussian Random Variables," (with D.R. Morgan), IEEE, ASSP-34, No. 4, p. 1004, 1986. |
| "Voice Privacy for Cordless Telephones," (with W. Ludescher), GOSAM, June 1986. |
