Auflistung nach Schlagwort "Light sources"

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  • Comparison of LASER and LED illumination for fiber optic fringe projection 
    Matthias, Steffen; Kästner, Markus; Reithmeier, Eduard (Bellingham, Wash. : SPIE, 2016)
    The inspection of functional elements is a crucial part of modern production cycles. However, with higher integration of production machinery and products, the accessibility for measurement systems is more and more limited. ...
  • Continuous-wave squeezed states of light via ‘up-down’ self-phase modulation 
    Singh, Amrit Pal; Ast, Stefan; Mehmet, Moritz; Vahlbruch, Henning; Schnabel, Roman (Washington, DC : OSA - The Optical Society, 2019)
    Continuous-wave (cw) squeezed states of light have applications in sensing, metrology and secure communication. In recent decades their efficient generation has been based on parametric down-conversion, which requires ...
  • Direct in situ GDD measurement in optical coating process 
    Schlichting, S.; Willemsen, Thomas; Ehlers, H.; Morgner, Uwe; Ristau, Detlev (Bellingham, WA : S P I E - International Society for Optical Engineering, 2015)
    In the presented work a fast frequency domain measurement system to determine group delay (GD) and group delay dispersion (GDD) of optical coatings is proposed. The measurements are performed in situ directly on moving ...
  • Experimental and theoretical study of the formation process of photopolymer based self-written waveguides 
    Suar, Monali; Melchert, Oliver; Rahlves, Maik; Roth, Bernhard (Washington, DC : OSA - The Optical Society, 2019)
    The realization of optical interconnects between multimode (MM) optical fibers and waveguides based on a self-writing process in photopolymer media represents an efficient approach for fast and easy-to-implement connection ...
  • First Demonstration of 6 dB Quantum Noise Reduction in a Kilometer Scale Gravitational Wave Observatory 
    Lough, James; Schreiber, Emil; Bergamin, Fabio; Grote, Hartmut; Mehmet, Moritz; Vahlbruch, Henning; Affeldt, Christoph; Brinkmann, Marc; Bisht, Aparna; Kringel, Volker; Lück, Harald; Mukund, Nikhil; Nadji, Severin; Sorazu, Borja; Strain, Kenneth; Weinert, Michael; Danzmann, Karsten (College Park, Md. : APS, 2021)
    Photon shot noise, arising from the quantum-mechanical nature of the light, currently limits the sensitivity of all the gravitational wave observatories at frequencies above one kilohertz. We report a successful application ...
  • Impact of industrial environments on visible light communication 
    Schneider, Daniel; Shrotri, Abhijeet; Flatt, Holger; Stübbe, Oliver; Wolf, Alexander; Lachmayer, Roland; Bunge, Christian-Alexander (Washington, DC : Optica, 2021)
    Visible-light communication is a promising technology for industrial environments. However, a variety of physical effects may influence the communication quality in this potentially harsh environment: Dust and other particles ...
  • Investigation of second harmonic generation and multispectral imaging as new contrast mechanisms in scanning laser optical tomography 
    Nolte, Lena; Antonopoulos, Georgios C.; Heisterkamp, Alexander; Ripken, Tammo; Meyer, Heiko (Bellingham, WA : S P I E - International Society for Optical Engineering, 2018)
    Scanning laser optical tomography (SLOT) is a 3D imaging technique, based on the principle of computed tomography to visualize samples up to magnitude of several centimeters. Intrinsic contrast mechanisms as absorption, ...
  • Low-cost fabrication of optical waveguides, interconnects and sensing structures on all-polymer-based thin foils 
    Rezem, Maher; Kelb, Christian; Günther, Axel; Rahlves, Maik; Reithmeier, Eduard; Roth, Bernhard (Bellingham, Wash. : SPIE, 2016)
    Micro-optical sensors based on optical waveguides are widely used to measure temperature, force and strain but also to detect biological and chemical substances such as explosives or toxins. While optical micro-sensors ...
  • Modeling of photoluminescence in laser-based lighting systems 
    Chatzizyrli, Elisavet; Tinne, Nadine; Lachmayer, Roland; Neumann, Jörg; Kracht, Dietmar (Bellingham, Wash. : SPIE, 2017)
    The development of laser-based lighting systems has been the latest step towards a revolution in illumination technology brought about by solid-state lighting. Laser-activated remote phosphor systems produce white light ...
  • Optical coupling of bare optoelectronic components and flexographically printed polymer waveguides in planar optronic systems 
    Wang, Yixiao; Wolfer, Tim; Lange, Alex; Overmeyer, Ludger (Bellingham, Wash. : SPIE, 2016)
    Large scale, planar optronic systems allowing spatially distributed functionalities can be well used in diverse sensor networks, such as for monitoring the environment by measuring various physical quantities in medicine ...
  • PV module current gains due to structured backsheets 
    Vogt, Malte R.; Holst, Hendrik; Schulte-Huxel, Henning; Blankemeyer, Susanne; Witteck, Robert; Bujard, Patrice; Kues, Jan-Bernd; Schinke, Carsten; Bothe, Karsten; Köntges, Marc; Brendel, Rolf (London : Elsevier Ltd., 2017)
    We evaluate the optical performance of PV modules with respect to an increase in short circuit current density. Our evaluation is based on the combination of ray tracing simulations and measurements on test modules with ...
  • Rapid prototyping of reflectors for vehicle lighting using laser activated remote phosphor 
    Lachmayer, Roland; Kloppenburg, Gerolf; Wolf, Alexander (Bellingham, Wash. : SPIE, 2015)
    Bright white light sources are of significant importance for automotive front lighting systems. Todays upper class vehicles mainly use HID or LED as light source. As a further step in this development laser diode based ...
  • Survey of on-road image projection with pixel light systems 
    Rizvi, Sadiq; Knöchelmann, Marvin; Ley, Peer-Phillip; Lachmayer, Roland (Bellingham, Wash. : SPIE, 2017)
    HID, LED and laser-based high resolution automotive headlamps, as of late known as pixel light systems', are at the forefront of the developing technologies paving the way for autonomous driving. In addition to light ...
  • Temperature issues with white laser diodes, calculation and approach for new packages 
    Lachmayer, Roland; Kloppenburg, Gerolf; Stephan, Serge (Bellingham, Wash. : SPIE, 2015)
    Bright white light sources are of significant importance for automotive front lighting systems. Today's upper class systems mainly use HID or LED light sources. As a further step laser diode based systems offer a high ...
  • Temperature-dependence of polymer grating couplers for single-mode waveguides 
    Li, Pei; Sherman, Stanislav; Rezem, Maher; Honnef, Kirsten; Zappe, Hans (Bellingham, WA : SPIE - International Society for Optical Engineering, 2018)
    Polymer optical sensors have attracted significant scientific interest due to the advantages of flexibility and low-cost mass-production possibilities. A main challenge in integration of all-polymer systems is interfacing ...