Ray-Tracing Simulation Software

Ray-Tracing Simulation Software for Designing and Optimizing Auto-Stereoscopic 3D Displays

The "Ray-Tracing Simulation Software" is an engineering tool for the design and development of flat autostereoscopic display devices for single or multiple persons observing the presentation in the viewing area in front of the 3D display. It is adjustable to common LCD resolutions up to 8K and beyond. In simulation, light rays from a single or multiple lines of the matrix pixel plane can be calculated. Different kind of image splitter types can be selected, customized and parameterized. That has been implemented to simulate the influence of geometrical deviations in the image splitter shape too. The effect of parallax barriers with black or colored stripes as well as variable lenticulars, splitting the content of the sub pixel layer or matrix image plane, is simulated either by SAM, Matrix or Monte Carlo methods. The emission characteristics and view distribution are freely adjustable in a great range. The aim is a good adaptation to real 3D displays. Ray tracing mode is bidirectional from display panel to observer’s eyes and vice versa. Measurements of luminance and crosstalk in the simulation give the results for a qualified evaluation of the 3D design. An automated search mode for best image splitter arrangements is an additional beneficial feature of the tool.

Fig. 1: Visualization of a flat autostereoscopic 3D display design with parallax barrier and simulated light field
Fig. 2: Program GUI with visualization window, magnification level can freely be chosen
Fig. 3: Light distribution of a two-view system in the viewing space before the 3D display, a possible observer position is symbolized by the head with nose and two eyes
Fig. 4: Two-view system, luminance intensity of light distribution in the simulated nominal distance of 650 mm
Fig. 5: Two-view system, Monte Carlo light ray distribution in the simulated nominal distance of 650 mm
Fig. 6: Example of a wavelength-selective color filter barrier with a bump error in the barrier
Fig. 7: Viewing angle dependent optical aberration of a single lens element in a lenticular grid
Fig. 8: Automated design search

Functionalities

1. 3D display design is based on a multiple layer model,

2. Matrix image/pixel plane:

  • RGB/BGR or other designs like RGBW
  • Free specification of dimensions and emission angle and intensity of sub pixels

3. Image splitter plane:

  • Parallax barrier (Black/white or color stripes; Static or time switchable)
  • Lenticular (Position variation of lens parameters curvature and refractive indices)
  • Geometrical and optical aberrations

4. Content interleaving algorithms:

  • Automatic search and evaluation of image splitter arrangements

5. Calculation procedures:

  • SAM 
  • Matrix method
  • Monte-Carlo

6. Measurements:

  • View distribution in arbitrary distances
  • Luminance and crosstalk spectra

7. Graphical 3D visualization of display model and observer position,

8. Allocation of the image plane by real view dependent textures

References

Journal paper and conference proceedings:

  • René de la Barré, Roland Bartmann, Silvio Jurk, Mathias Kuhlmey, Bernd Duckstein, Arno Seeboth, Detlef Lötzsch, Christian Rabe, Peter Frach, Hagen Bartzsch, Matthias Gittner, Stefan Bruns, Gerhard Schottner, and Johanna Fischer: Time-Sequential Working Wavelength-Selective Filter for Flat Autostereoscopic Displays, Applied Sciences - Open Access Journal, vol. 7, issue 2, 194, February 2017, doi:10.3390/app7020194.
  • Roland Bartmann, Hannes Käding, and Mathias Kuhlmey: Investigation of optical image splitter design for flat autostereoscopic displays, Proceedings of Photonics Global Conference (PGC), Sands Expo and Convention Centre Singapore, Singapore, August 2017, Invited.
  • René de la Barré, Roland Bartmann, Mathias Kuhlmey, Bernd Duckstein, Silvio Jurk, and Sylvain Renault: A new design and image processing algorithm for lenticular lens displays, IS&T International Symposium on Electronic Imaging, Stereoscopic Displays and Applications XXVIII, San Francisco, USA, pp. 194-199, February 2017, doi:10.2352/ISSN.2470-1173.2017.5.SDA-377.
  • Silvio Jurk, Mathias Kuhlmey, Roland Bartmann, Bernd Duckstein, and René de la Barré: Flat autostereoscopic 3D display with enhanced resolution using a static color filter barrier, IS&T International Symposium on Electronic Imaging, Stereoscopic Displays and Applications XXVIII, San Francisco, USA, pp. 101-105, February 2017, doi:10.2352/ISSN.2470-1173.2017.5.SDA-364.
  • René de la Barré, Roland Bartmann, Mathias Kuhlmey, Bernd Duckstein, Silvio Jurk, and Sylvain Renault: A new design and algorithm for lenticular lenses display, International Conference on 3D Imaging (IC3D 2016), Liége, Belgium, December 13-14, 2016, doi:10.1109/IC3D.2016.7823447.
  • Silvio Jurk, Mathias Kuhlmey, Roland Bartmann, Bernd Duckstein, and René de la Barré: Autostereoscopic display concept with time-sequential wavelength-selective filter-barrier, Proceedings of SPIE Photonics West 2016, Advances in Display Technologies VI, San Francisco, CA, USA, vol. 9770, February 2016, doi:10.1117/12.2214344 .
  • Mathias Kuhlmey and Roland Bartmann: Subpixel-area based simulation for autostereoscopic displays with lenticular arrays, Proceedings of International Conference on 3D Imaging (IC3D 2015), Liege, Belgium, ISBN 978-1-5090-1264-0 , December 2015, doi:10.1109/IC3D.2015.7391840.
  • Mathias Kuhlmey, Silvio Jurk, Bernd Duckstein, and René de la Barré: Automated simulation and evaluation of autostereoscopic multiview 3D display designs by time-sequential and wavelength-selective filter barrier, SPIE Optical Systems Design 2015, Computational Optics, Jena, Germany, September 2015, doi:10.1117/12.2191339.
  • Roland Bartmann, Mathias Kuhlmey, Ronny Netzbandt, and René de La Barré: Validation of subpixel area based simulation for autostereoscopic displays with parallax barriers, Proceedings of International Conference on 3D Imaging (IC3D 2014), Liege, Belgium, December 2014, doi:10.1109/IC3D.2014.7032574.
  • Roland Bartmann, Mathias Kuhlmey, Ronny Netzbandt, and René de la Barré: Simulation of autostereoscopic displays by geometrical ray tracing and implication of optical effects, IEEE: 3DTV-Conference 2014 & INTERACT 2014, Budapest, Hungary, July 2-4, 2014, doi:10.1109/3DTV.2014.6874719.
  • Mathias Kuhlmey: Beitrag zur Untersuchung von Produktionsfehlern autostereoskopischer Displays, 19.06.2014, bachelor thesis tutored by Dipl.-Ing. Michael Tok/Dr.-Ing. de la Barré (HHI), Prof. Dr.-Ing. Thomas Sikora.