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22 September 2011 Accurate colour control by means of liquid crystal modulators
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We present the application of a simple physical model to accurately predict the broadband spectral transmittance and colorimetric properties of a twisted-nematic liquid crystal display (TNLCD). We spectroscopically calibrate the retardance parameters to evaluate the spectrum of the light transmitted by a TNLCD sandwiched between two linear polarizers. When the TNLCD is illuminated with a broadband light source, the full spectrum can be predicted as a function of the addressed grey level for any arbitrary orientation of the polarizers. Experimental results confirming the validity of the proposed systems are presented, both on the measured spectral responses as well as on the trajectories at different chromatic diagrams. The presented results can be useful for optoelectronic systems requiring an accurate control of the spectral characteristics of the light.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
I. Moreno, J. L. Martínez, P. García-Martínez, and M. M. Sánchez-López "Accurate colour control by means of liquid crystal modulators", Proc. SPIE 8134, Optics and Photonics for Information Processing V, 81340F (22 September 2011);

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