Dr. Heinrich A. Höfler Profile

Dr. Heinrich A. Höfler

Deputy Director and Head at Fraunhofer IPM

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Author

Publications (13)

Proceedings Article | 4 April 2014 Paper

Absolutely referenced distance measurement by combination of time-of-flight and digital holographic methods

Markus Fratz, Claudius Weimann, Harald Wölfelschneider, Christian Koos, Heinrich Höfler

Proceedings Volume 8992, 89920O (2014) https://doi.org/10.1117/12.2039426

KEYWORDS: Distance measurement, Interferometry, Modulation, Sensors, Digital holography, Phase measurement, Beam splitters, Fiber coupled lasers, Phase shift keying, Signal generators

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Proceedings Article | 24 May 2013 Paper

Inspecting rapidly moving surfaces for small defects using CNN cameras

Andreas Blug, Daniel Carl, Heinrich Höfler

Proceedings Volume 8791, 87911D (2013) https://doi.org/10.1117/12.2020568

KEYWORDS: Cameras, Image processing, Inspection, Imaging systems, Computing systems, Detection and tracking algorithms, Defect detection, Neural networks, Metals, Control systems

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Proceedings Article | 13 June 2005 Paper

Optical high-speed 3D metrology in harsh environments: recording structural data of railway lines

H. Hofler, C. Baulig, A. Blug, M. Dambacher, N. Dimopoulos, H. Wolfelschneider

Proceedings Volume 5856, (2005) https://doi.org/10.1117/12.621583

KEYWORDS: Signal detection, Sensors, Distance measurement, Scanners, Phase measurement, Optical design, Electronics, Phase shifts, Environmental sensing, Mirrors

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Proceedings Article | 21 September 1999 Paper

Theoretical modeling of the laser feedback technique for length measurement of moving materials

Thomas Allgeier, Heinrich Hoefler, Elmar Wagner

Proceedings Volume 3824, (1999) https://doi.org/10.1117/12.364287

KEYWORDS: Reflectivity, Interferometers, Doppler effect, Laser optics, Mirrors, Semiconductor lasers, Refractive index, Signal to noise ratio, Measurement devices, Diodes

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Proceedings Article | 8 March 1999 Paper

3D profiling by optical demodulation with an image intensifier

Heinrich Hoefler, Volker Jetter, Elmar Wagner

Proceedings Volume 3640, (1999) https://doi.org/10.1117/12.341068

KEYWORDS: Image intensifiers, Modulation, Phase shift keying, Phase shifts, Light sources, Demodulation, Distance measurement, CCD cameras, Cameras, Phase measurement

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Proceedings Article | 1 June 1998 Paper

High-precision length measurement by means of multisensory laser-feedback interferometry

Thomas Allgeier, Heinrich Hoefler, Elmar Wagner

Proceedings Volume 3411, (1998) https://doi.org/10.1117/12.307686

KEYWORDS: Interferometers, Doppler effect, Signal processing, Sensors, Laser interferometry, Interferometry, Laser scattering, Scattering, Refractive index, Laser optics

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Proceedings Article | 23 November 1994 Paper

Three-dimensional contouring by an optical radar system (ORAS)

Heinrich Hoefler, Gerhard Schmidtke

Proceedings Volume 2249, (1994) https://doi.org/10.1117/12.196097

KEYWORDS: 3D vision, Radar, 3D metrology, 3D image processing, 3D acquisition, Photography, Mirrors, Sensors, Distance measurement, Data acquisition

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Proceedings Article | 23 September 1994 Paper

Three-dimensional contouring by an optical radar system (ORAS)

Heinrich Hoefler, Gerhard Schmidtke

Proceedings Volume 2271, (1994) https://doi.org/10.1117/12.188147

KEYWORDS: Radar, 3D metrology, 3D image processing, Photography, 3D acquisition, Mirrors, Sensors, Distance measurement, Data acquisition, Semiconductor lasers

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Proceedings Article | 14 September 1994 Paper

Optical fibre micromechanical pressure sensor with very low temperature cross sensitivity

Seshadri Ramakrishnan, Heinrich Hoefler

Proceedings Volume 2360, (1994) https://doi.org/10.1117/12.185082

KEYWORDS: Sensors, Temperature metrology, Optical fibers, Magnetic sensors, Resonators, Light emitting diodes, Transducers, Semiconductor lasers, Diodes, Fiber couplers

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Proceedings Article | 6 January 1994 Paper

Three-dimensional contouring by an optical radar system

Heinrich Hoefler, Gerhard Schmidtke, Volker Jetter, A. Henninger

Proceedings Volume 2348, (1994) https://doi.org/10.1117/12.198848

KEYWORDS: Radar, Distance measurement, Modulation, Semiconductor lasers, 3D acquisition, Sensors, Phase shift keying, 3D image processing, Signal detection, Signal processing

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Proceedings Article | 1 February 1993 Paper

Three-dimensional contouring by an optical radar system

Heinrich Hoefler, Gerhard Schmidtke

Proceedings Volume 2088, (1993) https://doi.org/10.1117/12.168055

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Proceedings Article | 1 October 1990 Paper

Interferometric displacement measurement with automatic compensation ofinfluences of the ambient air

Heinrich Hoefler, J. Molnar, Christiane Schroeder, K. Kulmus

Proceedings Volume 1375, (1990) https://doi.org/10.1117/12.35035

KEYWORDS: Interferometry, Refractive index, Semiconductor lasers, Reflectors, Temperature metrology, Interferometers, Laser stabilization, Laser development, Distance measurement, Photodetectors

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Proceedings Article | 1 October 1990 Paper

3-D moire contouring with modified CCD-camera

M. Seib, Heinrich Hoefler

Proceedings Volume 1375, (1990) https://doi.org/10.1117/12.35029

KEYWORDS: Moire patterns, CCD cameras, Cameras, Interferometers, Fringe analysis, Light sources, Inspection, Holographic interferometry, Holography, Oxides

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Showing 5 of 13 publications

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