Mr. Florian Schneider Profile

Florian Schneider

at Technische Hochschule Deggendorf

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Publications (5)

Proceedings Article | 15 October 2013 Paper

A simple procedure to include a free-form measurement capability to standard coordinate measurement machines

Florian Schneider, Rolf Rascher, Richard Stamp, Gordon Smith

Proceedings Volume 8884, 888412 (2013) https://doi.org/10.1117/12.2028758

KEYWORDS: Computer aided design, Spherical lenses, Software development, Surface finishing, 3D metrology, Optical components, CAD systems, Finite element methods, Manufacturing, Optics manufacturing

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Proceedings Article | 7 September 2013 Paper

Analysis of three different measurement strategies carried out with the TII-3D coordinate measurement system

Florian Schneider, Roland Maurer, Rolf Rascher, Richard Stamp, Gordon Smith

Proceedings Volume 8838, 88380A (2013) https://doi.org/10.1117/12.2024001

KEYWORDS: 3D metrology, Photovoltaics, Time metrology, Data analysis, Interferometers, Applied sciences, Sensors, Optical tracking, Matrices, Algorithm development

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Proceedings Article | 7 September 2013 Paper

Calculation of the reference surface error by analyzing a multiple set of sub-measurements

Roland Maurer, Florian Schneider, Christine Wünsche, Rolf Rascher

Proceedings Volume 8838, 88380E (2013) https://doi.org/10.1117/12.2024003

KEYWORDS: Calibration, Spherical lenses, Error analysis, Optical spheres, Interferometry, Wavefronts, Metrology, Zernike polynomials, Applied sciences, Neodymium

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Proceedings Article | 23 May 2011 Paper

Physical marker based stitching process of circular and non-circular interferograms

Roland Maurer, Florian Schneider, Christian Vogt, Markus Schinhaerl, Peter Sperber, Rolf Rascher

Proceedings Volume 8083, 80830Q (2011) https://doi.org/10.1117/12.889491

KEYWORDS: Metrology, Mirrors, Interferometers, Applied sciences, Alignment procedures, Precision optics, Optical testing, Precision measurement, Software development, Computer generated holography

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Proceedings Article | 20 May 2009 Paper

Time-resolved two-wavelength contouring of adaptive fluidic PDMS-lenses

Thomas Hansel, Ruediger Grunwald, Günter Steinmeyer, Uwe Griebner, Florian Schneider, Ulrike Wallrabe

Proceedings Volume 7358, 735809 (2009) https://doi.org/10.1117/12.820698

KEYWORDS: Digital holography, Holograms, Holography, Cameras, Actuators, Polarization, Fluid dynamics, Holographic interferometry, Beam splitters, Laser sources

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We present a synthesized sub-ps dual-wavelength laser source for digital holographic interferometry with a wide reconstruction range. The developed laser source generates two spectrally separated parts within one pulse. The sub-ps pulse duration desensitizes the holographic setup to environmental impacts. A center wavelength distance of only 12 nm with a high contrast was demonstrated by spectral shaping of the 50 nm broad seed spectrum of a CPA Ti:sapphire laser system centered at 800 nm. Time-resolved two-wavelength contouring requires the simultaneous and separable recording of two holograms. In general, a single CCD-camera is applied, and the spectral separation is realized by different reference wave tilts, which requires ambitious interferometric setups. Contrary to this, we introduce two CCD-cameras for digital holographic recording, thus essentially simplifying the interferometric setup by the need of only one propagation direction of the reference wave. To separate the holograms for the simultaneous recording process, a Mach-Zehnder interferometer was extended by a polarization encoding sequence. To study our approach of time-resolved digital holographic two-wavelength contouring, an adaptive fluidic PDMS-lens with integrated piezoelectric actuator served as test object. The PDMS-lens consists of an oil-filled lens chamber and a pump actuator. If a voltage is applied to the piezoelectric bending actuator the fluid is pumped into the lens chamber which causes a curvature change of the 60-μm thick lens membrane and thus a shift of the focal length. The dynamic behavior of the PDMS-lens, driven at a frequency of 1 Hz, was investigated at a frame rate of 410 frames per second. The measured temporal change of the lens focal length between 98 and 44 mm followed the modulation of the piezoelectric voltage with a 30 V peak-to-peak amplitude. Due to the performed time-resolved two wavelength contouring, we are able to extract the optical path length differences between center and perimeter of the lens. From the calculated phase difference maps we estimated large optical path differences of larger than 10 μm, corresponding to more than 15 times of the source wavelength.

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