Prof. Emil Hällstig Profile

Prof. Emil Hällstig

Head of Product Engg

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Publications (14)

Proceedings Article | 24 August 2015 Paper

Single-shot dual-polarization holography: measurement of the polarization state of a magnetic sample

Davood Khodadad, Eynas Amer, Per Gren, Emil Melander, Emil Hällstig, Mikael Sjödahl

Proceedings Volume 9660, 96601E (2015) https://doi.org/10.1117/12.2189782

KEYWORDS: Polarization, Digital holography, Holography, Magnetism, Mirrors, Jones vectors, Sensors, Calibration, Multiplexing, Beam splitters

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Proceedings Article | 18 August 2014 Paper

Dual-wavelength digital holography: single shot calibration

Davood Khodadad, Per Bergström, Emil Hällstig, Mikael Sjödahl

Proceedings Volume 9203, 920305 (2014) https://doi.org/10.1117/12.2062101

KEYWORDS: Speckle, Calibration, Holograms, Digital holography, Chromatic aberrations, Wave propagation, Beam splitters, Spatial frequencies, Sensors, Environmental sensing

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SPIE Journal Paper | 28 June 2013 Open Access

Dual-wavelength digital holographic shape measurement using speckle movements and phase gradients

Davood Khodadad, Emil Hallstig, Mikael Sjödahl

OE, Vol. 52, Issue 10, 101912, (June 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.10.101912

KEYWORDS: Speckle, Digital holography, Holography, Holograms, Speckle pattern, Sensors, Phase measurement, Scattering, Wave propagation, Optical engineering

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Proceedings Article | 13 May 2013 Paper

Shape reconstruction using dual wavelength digital holography and speckle movements

Davood Khodadad, Emil Hällstig, Mikael Sjödahl

Proceedings Volume 8788, 87880I (2013) https://doi.org/10.1117/12.2020471

KEYWORDS: Speckle, Digital holography, Distance measurement, Sensors, Holograms, Wave propagation, Beam splitters, Interferometry, Phase interferometry, Speckle pattern

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Proceedings Article | 25 September 2012 Paper

Multi-spectral speckles: theory and applications

Mikael Sjödahl, Emil Hallstig, Davood Khodadad

Proceedings Volume 8413, 841306 (2012) https://doi.org/10.1117/12.981665

KEYWORDS: Speckle, Sensors, Speckle pattern, Interferometry, Scattering, Spatial frequencies, Imaging systems, Metrology, Digital holography, Phase measurement

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Proceedings Article | 14 September 2010 Paper

Phase errors in speckle reduced laser fringe projection

S, Rosendahl, E. Hällstig, P. Gren, M. Sjödahl

Proceedings Volume 7387, 73871E (2010) https://doi.org/10.1117/12.869659

KEYWORDS: Phase shift keying, Speckle, Modulation, Speckle pattern, Fringe analysis, Error analysis, Cameras, Optical filters, Sensors, Beam splitters

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Proceedings Article | 18 June 2007 Paper

Characterization and compensation of decorrelations in interferometric set-ups using active optics

Emil Hällstig, Angelica Svanbro

Proceedings Volume 6616, 661619 (2007) https://doi.org/10.1117/12.726054

KEYWORDS: Spatial light modulators, Speckle, Speckle pattern, Interferometry, Sensors, Active optics, Interferometers, Modulation, Phase measurement, 3D scanning

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SPIE Journal Paper | 1 April 2005

Retrocommunication utilizing electroabsorption modulators and nonmechanical beam steering

Emil Hällstig, Johan Öhgren, Lars Allard, Lars Sjöqvist, David Engstroem, Sverker Hard, Daniel Ågren, Stéphane Junique, Qin Wang, Bertrand Noharet

OE, Vol. 44, Issue 04, 045001, (April 2005) https://doi.org/10.1117/12.10.1117/1.1883063

KEYWORDS: Modulators, Spatial light modulators, Beam steering, Reflectivity, Sensors, Liquid crystals, Transceivers, Video, Optical engineering, Quantum wells

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Proceedings Article | 8 December 2004 Paper

A novel free-space retrocommunication link

Lars Sjoqvist, Emil Hallstig, Johan Ohgren, Lars Allard, Daniel Agren, Stephane Junique, Qin Wang, Bertrand Noharet, David Engstrom, Sverker Hard

Proceedings Volume 5614, (2004) https://doi.org/10.1117/12.578267

KEYWORDS: Modulators, Spatial light modulators, Beam steering, Transceivers, Reflectivity, Quantum wells, Liquid crystals, Turbulence, Optical modulators, Sensors

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Proceedings Article | 30 November 2004 Paper

Polarization properties of a reflective LC on silicon SLM

Emil Hallstig, Torleif Martin, Lars Sjoqvist, Mikael Lindgren

Proceedings Volume 5618, (2004) https://doi.org/10.1117/12.578519

KEYWORDS: Polarization, Liquid crystals, Spatial light modulators, Finite-difference time-domain method, Dielectric polarization, Phase shifts, Diffraction, Electrodes, Transmittance, Phase modulation

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Proceedings Article | 6 February 2004 Paper

Characterization of depolarizing fringing fields of a liquid crystal spatial light modulator for laser beam steering

Emil Haellstig, Torleif Martin, Johan Stigwall, Lars Sjoqvist, Mikael Lindgren

Proceedings Volume 5237, (2004) https://doi.org/10.1117/12.510990

KEYWORDS: Liquid crystals, Polarization, Spatial light modulators, Diffraction, Diffraction gratings, Finite-difference time-domain method, Binary data, Phase modulation, Beam steering, Electrodes

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Proceedings Article | 21 August 2003 Paper

Laser beam steering and tracking using a liquid crystal spatial light modulator

Emil Haellstig, Johan Stigwall, Mikael Lindgren, Lars Sjoqvist

Proceedings Volume 5087, (2003) https://doi.org/10.1117/12.486892

KEYWORDS: Spatial light modulators, Beam steering, Diffraction, Liquid crystals, Sensors, CCD cameras, Phase modulation, Phase shift keying, Phase measurement, Beam splitters

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SPIE Journal Paper | 1 March 2003

Intensity variations using a quantized spatial light modulator for nonmechanical beam steering

Emil Haellstig, Lars Sjoeqvist, Mikael Lindgren

OE, Vol. 42, Issue 03, (March 2003) https://doi.org/10.1117/12.10.1117/1.1543175

KEYWORDS: Spatial light modulators, Diffraction, Diffraction gratings, Beam steering, Phase modulation, Phase shift keying, Liquid crystals, Binary data, Quantization, Reflection

Proceedings Article | 4 June 2002 Paper

Characterization of a liquid crystal spatial light modulator for beam steering

Emil Haellstig, Lars Sjoeqvist, Mikael Lindgren

Proceedings Volume 4632, (2002) https://doi.org/10.1117/12.469766

KEYWORDS: Spatial light modulators, Phase shift keying, Beam steering, Diffraction, Liquid crystals, Phase modulation, Quantization, Phase measurement, Phase shifts, Binary data

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Showing 5 of 14 publications

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