Use of polar decomposition of Mueller matrices for optimizing the phase response of a liquid-crystal-on-silicon display

Clemente, Pere; Durán, Vicente; Martínez-León, Lluís; Climent, Vicent; Tajahuerce, Enrique; Láncis, Jesús

doi:10.1364/oe.16.001965

Cited by 33 publications

(27 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, their performance is characterized by their linear retardance as a function of the applied voltage. However, it has been found by numerous researchers [11][12][13][14][15][16][17][18] that in general, LCoS (both parallel-aligned and twisted nematic) produces phase flicker and/or depolarization. This is true for the ones with a digital backplane [13] due to the pulsed nature of the voltage signal addressed [12,13], but it may also be true in analogically addressed due to charge leakage in the pixel between consecutive refreshing frames.…”

Section: Introductionmentioning

confidence: 99%

Predictive capability of average Stokes polarimetry for simulation of phase multilevel elements onto LCoS devices

et al. 2015

View full text Add to dashboard Cite

Parallel-aligned (PA) liquid-crystal on silicon (LCoS) microdisplays are especially appealing in a wide range of spatial light modulation applications since they enable phase-only operation. Recently we proposed a novel polarimetric method, based on Stokes polarimetry, enabling the characterization of their linear retardance and the magnitude of their associated phase fluctuations or flicker, exhibited by many LCoS devices. In this work we apply the calibrated values obtained with this technique to show their capability to predict the performance of spatially varying phase multilevel elements displayed onto the PA-LCoS device. Specifically we address a series of multilevel phase blazed gratings. We analyze both their average diffraction efficiency ("static" analysis) and its associated time fluctuation ("dynamic" analysis). Two different electrical configuration files with different degrees of flicker are applied in order to evaluate the actual influence of flicker on the expected performance of the diffractive optical elements addressed. We obtain a good agreement between simulation and experiment, thus demonstrating the predictive capability of the calibration provided by the average Stokes polarimetric technique. Additionally, it is obtained that for electrical configurations with less than 30°amplitude for the flicker retardance, they may not influence the performance of the blazed gratings. In general, we demonstrate that the influence of flicker greatly diminishes when the number of quantization levels in the optical element increases.

show abstract

Section: Introductionmentioning

confidence: 99%

Predictive capability of average Stokes polarimetry for simulation of phase multilevel elements onto LCoS devices

et al. 2015

View full text Add to dashboard Cite

show abstract

“…3 Liquid crystal on silicon (LCoS) displays have become the most attractive microdisplays for these applications due to their very high spatial resolution and very high light efficiency. 4,5 However, several authors [6][7][8][9][10][11] have detected that LCoS displays produce a certain amount of phase flicker and/or depolarization. Among the different LCoS technologies typically available, parallel aligned LCoS (PA-LCoS) are especially interesting since they allow easy operation as phase-only devices without coupled amplitude modulation.…”

Section: Introductionmentioning

confidence: 99%

Extended linear polarimeter to measure retardance and flicker: application to liquid crystal on silicon devices in two working geometries

et al. 2014

View full text Add to dashboard Cite

Abstract. We focus on the evaluation of the applicability of the classical and well-established linear polarimeter to the measurement of linear retardance in the presence of phase flicker. This analysis shows that there are large errors in the results provided by the linear polarimeter when measuring the linear retardance of a device. These errors depend on the specific retardance value under measurement. We show that there are some points where this limitation can be used to measure the fluctuation amplitude consistently. An elegant method is further proposed, enabling the measurement of the average retardance value, thus extending the applicability of the classical linear polarimeter. Experimental characterization results are provided for various electrical sequences addressed onto a parallel aligned liquid crystal on silicon (LCoS) display. Good agreement is obtained with experiment, thus validating the linear polarimeter methodology proposed. Furthermore, results are provided for the LCoS in two reflection geometries, perpendicular incidence with and without nonpolarizing beam splitter, demonstrating robustness of the method. As a result, the evaluation of both phase modulation range and flicker magnitude for any electrical sequence addressed can be easily obtained, which is very important for optimal use of LCoS displays in applications.

show abstract

“…Liquid crystal on silicon (LCoS) displays have become the most attractive microdisplays for these applications due to their very high spatial resolution and very high light efficiency [4]. However, several authors [5][6][7][8][9] have detected that LCoS displays produce certain amount of depolarization. We have recently demonstrated [8,9] that this depolarization effect is caused by temporal fluctuations of the state of polarization (SOP) of the reflected beam, originated by fluctuations of the LC molecular orientation as a function of time.…”

Section: Introductionmentioning

confidence: 99%

“…In general, the phase modulation properties of LCDs have been analyzed by means of Jones matrix based methods. However, the above mentioned depolarization effects led to the use of the Mueller-Stokes formalism in the study of LCoS displays [5][6][7]. We have recently combined both types of analysis to evaluate the depolarization as well as to find polarization configurations that lead to an amplitude-only or to a phase-only modulation [19].…”

Section: Introductionmentioning

confidence: 99%

Time fluctuations of the phase modulation in a liquid crystal on silicon display: characterization and effects in diffractive optics

Moreno¹,

Lizana²,

Márquez³

et al. 2008

Opt. Express

149

View full text Add to dashboard Cite

Abstract:In this paper we provide evidence of the temporal fluctuations of the phase modulation property of a liquid crystal on silicon (LCoS) display, and we analyze its effect when the device is used for displaying a diffractive optical element. We use a commercial twisted nematic LCoS display configured to produce a phase-only modulation, and we provide time resolved measurements of the diffraction efficiency that show rapid fluctuations of the phase modulation, in the millisecond order. We analyze how these fluctuations have to be considered in two typical methods for the characterization of the phase modulation: two beam interference and diffraction from a binary grating. We finally provide experimental results on the use of this device for displaying a computer generated hologram. A reduction of the modulation diffraction efficiency results from the phase modulation fluctuation. Opt. Eng. 29, 240-246 (1990

show abstract

Use of polar decomposition of Mueller matrices for optimizing the phase response of a liquid-crystal-on-silicon display

Cited by 33 publications

References 23 publications

Predictive capability of average Stokes polarimetry for simulation of phase multilevel elements onto LCoS devices

Predictive capability of average Stokes polarimetry for simulation of phase multilevel elements onto LCoS devices

Extended linear polarimeter to measure retardance and flicker: application to liquid crystal on silicon devices in two working geometries

Time fluctuations of the phase modulation in a liquid crystal on silicon display: characterization and effects in diffractive optics

Contact Info

Product

Resources

About