Direkt zu
Kooperationen

SCoPE

SimTech

GSaME

Baden-Württemberg Stiftung

 

DFG

 

BMBF

twip optical solutions GmbH

 

 
Kontakt

Institut f. Technische Optik
Universität Stuttgart
Pfaffenwaldring 9
70569 Stuttgart
Deutschland

T: +49 (0)711/685-66074
F: +49 (0)711/685-66586

 

Charakterisierung und Ansteuerung von Lichtmodulatoren

LichtmodulatorenSpatial light modulators are the core elements to realize our active optical systems. A lot of different modulators, electrically as well as optically addressed, have been characterized and employed for different applications over the years. Currently, we use parallel aligned high resolution modulators from Holoeye to achieve phase modulation.

The modulation characteristic of such elements strongly depends not only on external factors like temperature or wavelength of the light but also on the content to be displayed on the element. Therefore, characterization and addressing is difficult. Especially so-called fringing field effects lead to a content-dependent modulation characteristic. For optimum results such effects have to be considered when addressing the elements. Due to the non-ideal modulation, typically, additional unwanted diffraction orders have to be taken into account.

For the fast addressing we employ hologram computation on NVidia graphics boards. Additional aberrations of the modulator or the rest of the optical system can be eliminated by the digital superposition of the phase conjugated aberration.

Publications:

  1. Haist, T., Lingel, C., Adler, R., Osten, W., „Parallelized Genetic Optimization of Spatial Light Modulator Addressing for Diffractive Applications“, Accepted for publication Applied Optics 2014
  2. Lingel, T. Haist, and W. Osten, "Optimizing the diffraction efficiency of SLM-based holography with respect to the fringing field effect," Appl. Opt.  52, 6877-6883 (2013).
  3. Lingel, C., Haist, T., Osten, W., "Examination and optimizing of a liquid crystal display used as spatial light modulator concerning the fringing field effect", Proceedings of SPIE Vol. 8490, 84900H (2012)
  4. Zwick, S., Haist, T.,  Warber, M., Osten, W.,  "Dynamic holography using pixelated light modulators," Appl. Opt.  49, F47-F58 (2010).
  5. Kohler, C., Haist, T., Osten, W., „Model-free method for measuring the full Jones matrix of reflective liquid-crystal displays“, Optical Engineering 48(04), 044002 (2009)
  6. Kohler, C., Schwab, X., Osten, W., "Optimally tuned spatial light modulators for digital holography," Appl. Opt.  45, 960-967 (2006).