Dr. Neal C. Gallagher Profile

Dr. Neal C. Gallagher

Board Chair at Socrates Preparatory School

SPIE Involvement:

Author | Instructor

Proceedings Article | 15 May 1997 Paper

Computer-generated microwave holograms as phase shifters

Tanveer ul Haq, Kevin Webb, Neal Gallagher

Proceedings Volume 3010, (1997) https://doi.org/10.1117/12.274438

KEYWORDS: Waveguides, Phase shifts, Microwave radiation, Holograms, Semiconductors, Waveguide modes, Optical design, Dielectrics, Computer generated holography, Control systems

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Proceedings Article | 18 August 1995 Paper

Finite element simulation of wavelength scale optical elements

Bernd Lichtenberg, Kevin Webb, Neal Gallagher

Proceedings Volume 2622, (1995) https://doi.org/10.1117/12.216808

KEYWORDS: Diffraction, Diffraction gratings, Optical components, Finite element methods, Polarization, Chemical elements, Zone plates, Reflection, Optical design, Binary data

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Proceedings Article | 18 August 1995 Paper

Aperiodic grating structure for TE11 to TM11 mode conversion

Tanveer ul Haq, Kevin Webb, Neal Gallagher

Proceedings Volume 2622, (1995) https://doi.org/10.1117/12.216809

KEYWORDS: Optical design, Waveguides, Scattering, Electrical engineering, Waveguide modes, Microwave radiation, Structural design, Energy efficiency, Energy coupling, Control systems

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Proceedings Article | 18 August 1995 Paper

Inexpensive instrumentation for frequency domain detection and localization of heterogeneities utilizing diffusing optical waves

Jeffery Reynolds, Michael Erickson, Kevin Webb, Neal Gallagher

Proceedings Volume 2622, (1995) https://doi.org/10.1117/12.216813

KEYWORDS: Sensors, Tissue optics, Modulation, Light emitting diodes, Diffusion, Solid state electronics, Scattering, Signal detection, Phase shift keying, Receivers

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SPIE Journal Paper | 1 November 1994

Numerical modeling of diffractive devices using the finite element method

Bernd Lichtenberg, Neal Gallagher

OE, Vol. 33, Issue 11, (November 1994) https://doi.org/10.1117/12.10.1117/12.179876

KEYWORDS: Zone plates, Finite element methods, Binary data, Diffraction gratings, Scattering, Polarization, Chemical elements, Phase shifts, Diffraction, Instrument modeling

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Proceedings Article | 17 June 1994 Paper

Finite element approach for the numerical analysis and modeling of diffractive and scattering objects

Bernd Lichtenberg, Neal Gallagher

Proceedings Volume 2152, (1994) https://doi.org/10.1117/12.178062

KEYWORDS: Zone plates, Finite element methods, Holograms, Chemical elements, Numerical analysis, Scattering, Polarization, Phase shifts, Diffraction gratings, Opacity

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Proceedings Article | 1 April 1991 Paper

Use of threshold decomposition theory to derive basic properties of median filters

Robert Hawley, Neal Gallagher

Proceedings Volume 1451, (1991) https://doi.org/10.1117/12.44337

KEYWORDS: Digital filtering, Electronic filtering, Binary data, Optical filters, Nonlinear filtering, Nonlinear image processing, Image filtering, Detection theory, Logic, Visualization

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Proceedings Article | 1 March 1991 Paper

Binary optics in the '90s

Neal Gallagher

Proceedings Volume 1396, (1991) https://doi.org/10.1117/12.25774

KEYWORDS: Diffraction gratings, Diffraction, Binary data, Optical components, Holograms, Optical engineering, Digital holography, Holography, Computer generated holography, Optical design

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Proceedings Article | 27 December 1990 Paper

Theory and application of median-related filters

Neal Gallagher, Edward Coyle

Proceedings Volume 1347, (1990) https://doi.org/10.1117/12.23425

KEYWORDS: Digital filtering, Nonlinear filtering, Neural networks, Artificial intelligence, Aluminum, Complex systems

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Proceedings Article | 1 May 1990 Paper

Efficient electron-beam pattern data format for the production of binary computer-generated holograms

Robert Hawley, Neal Gallagher

Proceedings Volume 1211, (1990) https://doi.org/10.1117/12.17924

KEYWORDS: Raster graphics, Binary data, Computer generated holography, Holography, Computer programming, Wavefronts, Holograms, Fringe analysis, Detection and tracking algorithms, Electron beam lithography

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Showing 5 of 10 publications

SPIE Conference Volume | 15 December 1993

Miniature and Micro-Optics and Micromechanics

Conference Committee Involvement (3)

ITCom 2002: The Convergence of Information Technologies and Communications

29 July 2002 | Boston, United States

ITCom 2001: International Symposium on the Convergence of IT and Communications

20 August 2001 | Denver, United States

Miniature and Micro-Optics and Micromechanics

14 July 1993 | San Diego, CA, United States

Course Instructor

SC018: Scalar and Vector Methods for the Design of Diffractive, Mesocopic, Subwavelength, and Evanescent Optics

As fabrication methods continue to improve, diffractive optical elements that feature various sizes of illumination wavelengths are becoming available. Now, more accurate analysis and design methods must be used. In addition to a discussion of scalar design of gratings and zone plates, we survey several electromagnetic techniques for the design of mesoscopic, subwavelength, and evanescent optical elements. Wide arrays of numerical tools, suitable for periodic, aperiodic, inhomogeneous, and anisotropic elements, are discussed and design examples are presented.

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