Professional Experience
2005-Present Principal Engineer/Optical Design, Optical Research Associates
2001–2005 Director, Photonic and Imaging Engineering Services, Optical Research Associates
1997-2001 Assistant Director of Optical Engineering Services, Optical Research Associates
1991–1997 Optical Engineer, Leica AG
1989–1991 Head, Optical Design and Metrology, Leica Aarau (formerly Kern and Co. AG)
1988–1989 Optical Designer, Leica AG (formerly Wild Leitz AG)
1984–1988 Assistant Professor, Institute of Optics, University of Rochester
1983–1984 Instrument Designer, Kern Co., AG
1978–1983 Research Assistant, University of Arizona
1977–1978 Mathematician, Computer Sciences Corporation
1976–1977 Programmer, David Taylor Naval Ship R & D Center

Education
1983 Ph.D. Degree in Optics, University of Arizona
1981 M.S. Degree in Optics, University of Arizona
1976 B.S. Degree in Mathematics, Virginia Polytechnic Institute
In the general area of imaging optics, his experience ranges from conceptual design through assembly and alignment. He has designed such diverse systems as 3-D imagers for clinical dental use, visual, biocular and binocular systems including Helmet-Mounted Displays (HMDs), FLIR systems, stereographic cartography equipment; scanning lenses, tilt sensors, interferometers from the deep UV to the thermal IR as well as differential interference microscopes, MTF and distortion test equipment. He has specified the software for phase shifting interferometers and has presented hands-on training of users. He has also developed algorithms for white-light (coherence tomographic) optical alignment systems. He has designed, toleranced, and measured the performance of optical systems having Gradient Index (GRIN) optical elements, and has authored papers relating to the design of GRIN optical systems. He has taught optical testing, geometrical optics, and lens design at the university level.
He has designed and toleranced diffractive optical systems for both imaging and pattern-generating applications. Working closely with micro-optics fabricators, he has generated mask patterns for lithographic production of diffractive optical elements, and has hands-on experience in the alignment and testing of such systems.
Areas of research in which he has played an active role include the application of Nodal Aberration Theory to the design of tilted component optical systems, the development of design techniques for reducing the sensitivity of optical systems to tolerances, and the tolerancing of aspheric surfaces.

Publications
"Slope Error Tolerances for Optical Surfaces," paper TD04-4, SPIE Optifab conference, Rochester, NY, May 2007, (Invited paper).
"Using Global Synthesis to Find Tolerance-Insensitive Design Forms," SPIE Vol. 6432, p.63420M1-63420M11 (2006).
"Design of an advanced helmet mounted display (AHMD)," SPIE Vol. 5801, p. 304-315, (2005).
"Using Nodal Aberration Theory for Optical Design," 2004 Invited Paper, SPIE Annual Meeting, published in SPIE PM148, Robert Shannon and Roland Shack: Legends in Applied Optics, J. Harvey, R Hooker, eds. (2005).
"How to Talk to an Optical Design Consultant," presented at the OSA Annual Meeting, Long Beach, CA, 2001.
"Design of a wide-field, unity magnification dive mask," SPIE Vol. 5962, 2005.
"Neue Entwicklungen und zukunftige Trends in der Optikdesignsoftware," Presented at the German Optical Society meeting, Gottingen, June 2001
"Techniques and Tools for Obtaining Symmetrical Performance from Tilted-Component Systems," Optical Engineering, Vol. 39, No.7, pp.1776-1787, 2000.
"Integrated Micro-Optical Systems Fabricated by Replication Technology," (with M.T. Gale, M. Rossi, L. Stauffer and M. Scheidt), Presented at IODC Conference, SPIE Proceedings, Vol. 3482, 1998.
"Interferometric Measurement of Group and Phase Refractive Index," (with M. Hopler), Applied Optics, Vol. 30, No. 7, p. 735, 1991.
"Optical Lenses," K. Chang, ed., The Handbook of Microwave and Optical Components, Wiley, NY, Chapter 3, 1989.
"Optical Performance of Holographic Kinoforms," (with D. Buralli and G. Morris), Applied Optics, Vol. 28, No. 5, p. 976, 1989.
"Some Fundamental Limitations of Achromatic Holographic Systems," (with D. Buralli), Journal of the Optical Society of America, Vol. 6, p. 1863, 1989.
"The Y-Y Diagram for Radial Gradient Systems," (with R. Loce and M. Harrigan), Applied Optics, Vol. 27, No. 3, p. 452, 1988.
"Application of the Y-Y Diagram to GRIN Rod Design," (with M. Harrigan and R. Loce), Applied Optics, Vol. 27, No. 3, p. 459, 1988.
"Conversion of Group Refractive Index to Phase Refractive Index," (with M. Hopler), Journal of the Optical Society of America, Vol. 5, No. 10, p. 1595, 1988.
"Practical Tilted Mirror Systems," SPIE, Vol. 679, p. 12, 1986.
"Vector Aberration Theory and the Design of Off-Axis Systems," SPIE, Vol. 554, p. 76, 1985.
"Aberrations of Optical Systems with Large Tilts and Decentrations," SPIE, Vol. 399, p. 272, 1983.
"Fringe Shifts in Multiple Beam Fizeau Interferometry,"Journal of the Optical Society of America, Vol. 72, p. 638, 1982.

Patents
U.S. 7,230,766B2 Optical Combiner Designs and Head Mounted Displays
U.S. 6,612,693 Panoramic reverse galilean telescope optics for an underwater diving maks (co-inventor)
U.S. 5,953,114 Method of determining measurement-point position data and device for measuring the magnification of an optical beam path.  (co-inventor)
U.S. 5, 867,309 Stereomicroscope.  (co-inventor)
U.S. 5,841,149 Method of determining the distance of a feature of an object from a microscope, and a device for carrying out the method. (co-inventor)
DE 196 21 195.6 Verfahren und Vorrichtung zur Richtungsbestimmung zu einem Object (co-inventor)
DE 196 21 196.4 Optischer Sensor zum Verfolgen einer Zielmarke (co-inventor)
EP 0 801 760 B1 Method of Determining the Distance between a Feature on an Object and a Surgical Microscope and a Device for Carrying out the Method. (co-inventor)
EP 0 755 530 B1 Device for Determining the Position of a Surgical Microscope (co-inventor)
U.S. 6,043,890 Arrangement for Determining the Position of a Surgical Microscope

Professional Societies
Member—Optical Society of America for JOSA and Applied Optics
Member—Society of Photo-Optical Instrumentation Engineers
Member - German Society for Applied Optics
Member - American Society for Refractive and Cataract Surgery