Prof. Robert W. Cohn Profile

Prof. Robert W. Cohn

Professor Emeritus

SPIE Involvement:

Author

Publications (23)

Proceedings Article | 13 March 2024 Presentation + Paper

A personal retrospective on the development of the DLP and related spinoffs

Robert Cohn

Proceedings Volume 12900, 1290008 (2024) https://doi.org/10.1117/12.3004228

KEYWORDS: Spatial light modulators, Digital micromirror devices, Digital Light Processing, Diffraction, Micromirrors, Optical signal processing, Deformable mirrors, Compressive imaging, Grayscale lithography, Diffusers, Compressed sensing

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Proceedings Article | 3 September 2019 Presentation + Paper

Capillary-force-directed self-assembly of suspended nanomechanical structures above the electronic circuit layer

Robert Cohn

Proceedings Volume 11089, 1108905 (2019) https://doi.org/10.1117/12.2528466

KEYWORDS: Optical fibers, Polymers, Manufacturing, Semiconducting wafers, Microelectromechanical systems, Optical lithography

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Proceedings Article | 13 May 2016 Paper

Ultraflexible nanostructures and implications for future nanorobots

Robert Cohn, Balaji Panchapakesan

Proceedings Volume 9859, 98590B (2016) https://doi.org/10.1117/12.2237877

KEYWORDS: Nanostructures, Polymers, Nanofibers, Capillaries, Nanorobotics, Sensors, Actuators, Nanowires, Nanomaterials, Robots

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Proceedings Article | 8 September 2011 Paper

Comparison of frequency-based and spatial subdivision mask sets for passive detection and target tracking with a single photodetector

Seth Klein, Rammohan Ragade, Robert Cohn

Proceedings Volume 8165, 81651A (2011) https://doi.org/10.1117/12.893917

KEYWORDS: Digital micromirror devices, Modulation, Target detection, Photodetectors, Micromirrors, Detection and tracking algorithms, Cameras, Signal detection, Computer simulations, Sensors

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Proceedings Article | 19 May 2006 Paper

Expanding range of pulsed range sensors with active projection from spatial light modulators

Xiaodong Xun, Wei Su, Robert Cohn, Laurence Hassebrook, Daniel Lau

Proceedings Volume 6220, 62200I (2006) https://doi.org/10.1117/12.665843

KEYWORDS: Spatial light modulators, Cameras, Sensors, Diffraction, Complex systems, 3D image processing, Beam steering, Liquid crystals, Imaging systems, Active sensors

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Proceedings Article | 18 October 2004 Paper

Arbitrary multibeam laser scanning and trapping by use of a spatial light modulator and manual scripting interface

Xiaodong Xun, Xiaoguang Chang, Doo Jin Cho, Robert Cohn

Proceedings Volume 5514, (2004) https://doi.org/10.1117/12.557270

KEYWORDS: Spatial light modulators, Diffraction, Particles, Optical trapping, Interfaces, Microscopes, Computer programming, Laser scanners, Imaging systems, Software development

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Proceedings Article | 27 January 2004 Paper

Liquid crystal spatial light modulator for multispot beam steering

Jay Stockley, Steve Serati, Xiaodong Xun, Robert Cohn

Proceedings Volume 5160, (2004) https://doi.org/10.1117/12.506366

KEYWORDS: Liquid crystals, Spatial light modulators, Diffraction, Beam steering, Modulators, Modulation, Laser communications, Phased array optics, Dielectrics, Mirrors

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SPIE Journal Paper | 1 November 2001

Fundamental properties of spatial light modulators for the approximate optical computation of Fourier transforms: review

Robert Cohn

OE, Vol. 40, Issue 11, (November 2001) https://doi.org/10.1117/12.10.1117/1.1409336

KEYWORDS: Spatial light modulators, Computer programming, Modulation, Diffraction, Phase shift keying, Fourier transforms, Modulators, Optical engineering, Binary data, Computer generated holography

Proceedings Article | 20 March 2001 Paper

Dynamic spot pattern projection to detect and track object motion

Laurence Hassebrook, Robert Cohn

Proceedings Volume 4387, (2001) https://doi.org/10.1117/12.421144

KEYWORDS: Sensors, Detection and tracking algorithms, Signal to noise ratio, Computer programming, Spatial light modulators, Phase only filters, System integration, Complex systems, Lithium, Image enhancement

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Proceedings Article | 29 November 2000 Paper

Fundamental properties of spatial light modulators for Fourier transform applications

Robert Cohn

Proceedings Volume 4114, (2000) https://doi.org/10.1117/12.408538

KEYWORDS: Computer programming, Spatial light modulators, Modulation, Phase shift keying, Fourier transforms, Diffraction, Modulators, Computer generated holography, Binary data, Signal processing

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Proceedings Article | 1 June 1999 Paper

Improved spot array generation using diffuser pixels to represent complex-valued modulations

David Hill, Markus Duelli, Robert Cohn

Proceedings Volume 3633, (1999) https://doi.org/10.1117/12.349336

KEYWORDS: Diffusers, Transmittance, Speckle pattern, Computer programming, Modulation, Speckle, Diffraction, Signal to noise ratio, Algorithm development, Diffractive optical elements

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SPIE Journal Paper | 1 February 1999

Analyzing the encoding range of amplitude-phase coupled spatial light modulators

Robert Cohn

OE, Vol. 38, Issue 02, (February 1999) https://doi.org/10.1117/12.10.1117/1.602095

KEYWORDS: Computer programming, Modulation, Spatial light modulators, Binary data, Phase shift keying, Computer generated holography, Modulators, Fourier transforms, Algorithm development, Statistical analysis

Proceedings Article | 20 April 1998 Paper

Analyzing the encoding range of amplitude-/phase-coupled spatial light modulators

Robert Cohn

Proceedings Volume 3292, (1998) https://doi.org/10.1117/12.305498

KEYWORDS: Computer programming, Spatial light modulators, Modulation, Phase shift keying, Modulators, Fourier transforms, Diffraction, Statistical analysis, Error analysis, Image segmentation

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Proceedings Article | 7 July 1997 Paper

Real-time multispot beam steering with electrically controlled spatial light modulators

Robert Cohn

Proceedings Volume 3131, (1997) https://doi.org/10.1117/12.277743

KEYWORDS: Diffraction, Computer programming, Modulation, Spatial light modulators, Phase shift keying, Modulators, Fourier transforms, Apodization, Transmittance, Scanners

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Proceedings Article | 27 March 1997 Paper

Strategy for autonomous control of correlation-based trackers

Laurence Hassebrook, Robert Cohn, Robert Duncan

Proceedings Volume 3073, (1997) https://doi.org/10.1117/12.270393

KEYWORDS: Detection and tracking algorithms, Image filtering, Digital signal processing, Signal to noise ratio, Spatial light modulators, Composites, Target detection, Charge-coupled devices, Electronic filtering, Linear filtering

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Proceedings Article | 25 September 1996 Paper

Pseudorandom encoding of fully complex modulation to biamplitude phase modulators

Robert Cohn, Wenyao Liu

Proceedings Volume 2894, (1996) https://doi.org/10.1117/12.252097

KEYWORDS: Computer programming, Modulators, Modulation, Diffraction, Phase shift keying, Phase only filters, Optical design, Interference (communication), Signal to noise ratio, Optimal filtering

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SPIE Journal Paper | 1 June 1995

Performance models of correlators with random and systematic phase errors

Robert Cohn

OE, Vol. 34, Issue 06, (June 1995) https://doi.org/10.1117/12.10.1117/12.203088

KEYWORDS: Spatial light modulators, Error analysis, Phase shift keying, Optical correlators, Electronic filtering, Phase only filters, Optical filters, Diffraction, Performance modeling, Image filtering

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Proceedings Article | 29 June 1994 Paper

Performance models of correlators with random and systematic phase errors

Robert Cohn, Joseph Horner

Proceedings Volume 2240, (1994) https://doi.org/10.1117/12.179132

KEYWORDS: Error analysis, Electronic filtering, Optical filters, Diffraction, Optical correlators, Phase shift keying, Spatial light modulators, Phase only filters, Performance modeling, Wavefronts

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Proceedings Article | 1 March 1994 Paper

Limited phase modulation and its effect on phase-only correlation

Robert Cohn, Joseph Horner

Proceedings Volume 2237, (1994) https://doi.org/10.1117/12.169417

KEYWORDS: Phase shift keying, Spatial light modulators, Phase only filters, Phase modulation, Modulation, Quantization, Modulators, Optical correlators, Performance modeling, Optical pattern recognition

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Proceedings Article | 1 March 1994 Paper

Using pseudorandom phase-only encoding to approximate fully complex distortion-invariant filters

Laurence Hassebrook, Michael Lhamon, Raymond Daley, Robert Cohn, Minhua Liang

Proceedings Volume 2237, (1994) https://doi.org/10.1117/12.169425

KEYWORDS: Phase only filters, Image filtering, Computer programming, Linear filtering, Transmittance, Composites, Spatial light modulators, Fourier transforms, Optical pattern recognition, Optical filters

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Proceedings Article | 13 January 1993 Paper

Statistical moments of the transmittance of phase-only spatial light modulators

Robert Cohn, R. Nonnenkamp

Proceedings Volume 1751, (1993) https://doi.org/10.1117/12.138892

KEYWORDS: Diffraction, Spatial light modulators, Error analysis, Monte Carlo methods, Transmittance, Fourier transforms, Phase shift keying, Micro optics, Modulation, Modulators

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Proceedings Article | 12 January 1993 Paper

Random phase errors and pseudorandom phase modulation of deformable mirror spatial light modulators

Robert Cohn

Proceedings Volume 1772, (1993) https://doi.org/10.1117/12.140923

KEYWORDS: Diffraction, Spatial light modulators, Error analysis, Optical correlators, Phase shift keying, Phase only filters, Deformable mirrors, Modulation, Fourier transforms, Electronic filtering

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SPIE Journal Paper | 1 January 1992

Link analysis of a deformable mirror device based optical crossbar switch

Robert Cohn

OE, Vol. 31, Issue 01, (January 1992) https://doi.org/10.1117/12.10.1117/12.56052

KEYWORDS: Digital micromirror devices, Switches, Sensors, Receivers, Transmitters, Deformable mirrors, Spatial light modulators, Mirrors, Semiconductor lasers, Semiconductors

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Showing 5 of 23 publications

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