Dr. Rene Zehnder Profile

Dr. Rene Zehnder

Optical Consultant, Self Employed at Optical Consulting GmbH

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Author

Publications (8)

Proceedings Article | 21 November 2007 Paper

Absolute calibration of null correctors using dual computer-generated holograms

Proteep Mallik, Rene Zehnder, James Burge, Alexander Poleshchuk

Proceedings Volume 6721, 672104 (2007) https://doi.org/10.1117/12.782680

KEYWORDS: Computer generated holography, Wavefronts, Aspheric lenses, Mirrors, Calibration, Spherical lenses, Interferometers, Aspheric optics, Distortion, Holograms

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Proceedings Article | 21 September 2007 Paper

Optical alignment with computer-generated holograms

James Burge, Rene Zehnder, Chunyu Zhao

Proceedings Volume 6676, 66760C (2007) https://doi.org/10.1117/12.735853

KEYWORDS: Computer generated holography, Wavefronts, Optical alignment, Aspheric lenses, Mirrors, Diffraction, Spherical lenses, Charge-coupled devices, Interferometers, Multiplexing

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Proceedings Article | 14 August 2006 Paper

Absolute calibration of null correctors using twin computer-generated holograms

Proteep C. V. Mallik, Rene Zehnder, James Burge, Alexander Poleshchuk

Proceedings Volume 6292, 62920H (2006) https://doi.org/10.1117/12.681035

KEYWORDS: Computer generated holography, Aspheric lenses, Calibration, Wavefronts, Optical spheres, Spherical lenses, Mirrors, Error analysis, Optical testing, Aspheric optics

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Proceedings Article | 6 July 2006 Paper

Manufacture of a 1.7m prototype of the GMT primary mirror segments

H. Martin, J. Burge, S. Miller, B. Smith, R. Zehnder, C. Zhao

Proceedings Volume 6273, 62730G (2006) https://doi.org/10.1117/12.672105

KEYWORDS: Mirrors, Polishing, Surface finishing, Off axis mirrors, Optical testing, Telescopes, Monochromatic aberrations, Wavefronts, Spherical lenses, Aspheric lenses

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Proceedings Article | 6 July 2006 Paper

Design and analysis for interferometric measurements of the GMT primary mirror segments

J. Burge, L. Kot, H. Martin, R. Zehnder, C. Zhao

Proceedings Volume 6273, 62730M (2006) https://doi.org/10.1117/12.672484

KEYWORDS: Mirrors, Computer generated holography, Optical testing, Optical spheres, Aspheric lenses, Telescopes, Interferometers, Wavefronts, Interferometry, Optical alignment

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Proceedings Article | 6 July 2006 Paper

Use of computer generated holograms for alignment of complex null correctors

Rene Zehnder, James Burge, Chunyu Zhao

Proceedings Volume 6273, 62732S (2006) https://doi.org/10.1117/12.672139

KEYWORDS: Computer generated holography, Optical spheres, Mirrors, Optical alignment, Beam splitters, Wavefronts, Reflection, Calibration, Aspheric lenses, Chemical elements

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SPIE Journal Paper | 1 September 2005 Open Access

Measuring the radius of curvature of a spherical mirror with an interferometer and a laser tracker

Chunyu Zhao, René Zehnder, James Burge

OE, Vol. 44, Issue 09, 090506, (September 2005) https://doi.org/10.1117/12.10.1117/1.2047594

KEYWORDS: Mirrors, Spherical lenses, Distance measurement, Interferometers, Wavefronts, Optical tracking, Phase interferometry, Direct methods, Confocal microscopy, Retroreflectors

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Proceedings Article | 19 August 2005 Paper

Testing an off-axis parabola with a CGH and a spherical mirror as null lens

Chunyu Zhao, Rene Zehnder, James Burge, Hubert Martin

Proceedings Volume 5869, 586911 (2005) https://doi.org/10.1117/12.615465

KEYWORDS: Mirrors, Computer generated holography, Spherical lenses, Off axis mirrors, Monochromatic aberrations, Optical spheres, Tolerancing, Telescopes, Actuators, Wavefronts

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Showing 5 of 8 publications

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