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Proceedings Article

Determination of the Jones Matrix of an LC cell and derivation of the physical parameters of the LC molecules

[+] Author Affiliations
Andreas Hermerschmidt

HOLOEYE Photonics AG (Germany)

Stephanie Quiram, Frank Kallmeyer, Hans Joachim Eichler

Technische Univ. Berlin (Germany)

Proc. SPIE 6587, Liquid Crystals and Applications in Optics, 65871B (May 09, 2007); doi:10.1117/12.722895
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From Conference Volume 6587

  • Liquid Crystals and Applications in Optics
  • Milada Glogarova; Peter Palffy-Muhoray; Martin Copic
  • Prague, Czech Republic | April 16, 2007

abstract

The wavelength-dependent Jones matrix representation of a twisted-nematic liquid crystal (TN-LC) cell contains four independent parameters. The absolute values of these parameters and two mutual sign relationships can be determined from comparatively simple transmission measurements of the TN-LC cells sandwiched between two rotatable polarizers. The physical parameters of the cell (twist angle α, director orientation ψ, birefringence β) can be retrieved if the Jones matrix is known for more than one wavelength. We have measured the Jones matrices of the TN-LC cells of a translucent Sony LCX-016 microdisplay for six wavelengths ranging from 488nm to 1064nm and determined the physical parameters of the cell. We have also measured the Jones matrices for one wavelength for a number of applied voltages. These experimental results show that it is not sufficiently exact to calculate the Jones matrix from the known physical parameters of the cell assuming a voltage-dependent birefringence only. We attribute the deviations from the theoretical model to edge effects which are not taken into account. The direct experimental determination of the Jones matrix components is therefore preferable and permits a more accurate simulation of the TN-LC microdisplay in experimental configurations involving other polarization-dependent optical components.

© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Andreas Hermerschmidt ; Stephanie Quiram ; Frank Kallmeyer and Hans Joachim Eichler
"Determination of the Jones Matrix of an LC cell and derivation of the physical parameters of the LC molecules", Proc. SPIE 6587, Liquid Crystals and Applications in Optics, 65871B (May 09, 2007); doi:10.1117/12.722895; http://dx.doi.org/10.1117/12.722895


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