Journal ArticleDOI
Polarization eigenstates for twisted-nematic liquid-crystal displays.
TLDR
It is shown that superior phase-only operation can be obtained over a given operating range for the LCD compared with other approaches and that the eigenvectors are elliptically polarized.Abstract:
We derive theoretical expressions for the eigenvalues and the eigenvectors for a twisted-nematic liquid-crystal display (LCD) as a function of the twist angle and the birefringence by use of the Jones-matrix formalism. These polarization eigenvectors are of particular interest for phase-only transmission because they propagate unchanged through the display. We find that the eigenvectors are elliptically polarized and that the ellipticity changes as a function of the birefringence of the LCD (which is proportional to the external voltage applied to the display). We can define an average eigenvector over a desired range for the applied voltage. We show, using Jones matrices, how this average eigenvector can be generated using a quarter-wave plate and a linear polarizer having appropriate orientation angles. Using this average eigenvector, we show that superior phase-only operation can be obtained over a given operating range for the LCD compared with other approaches.read more
Citations
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Journal ArticleDOI
Encoding amplitude information onto phase-only filters
TL;DR: A new, to the knowledge, technique for encoding amplitude information onto a phase-only filter with a single liquid-crystal spatial light modulator, effectively allowing for amplitude modulation of either the first-order or the zero-order diffracted light.
Journal ArticleDOI
Complete polarization control of light from a liquid crystal spatial light modulator
TL;DR: By combining previously reported techniques, this work can achieve complete amplitude, phase and polarization control for the diffracted light that allows the creation of arbitrary diffractive optical elements including polarization control.
Journal ArticleDOI
Time fluctuations of the phase modulation in a liquid crystal on silicon display: characterization and effects in diffractive optics
Ignacio Moreno,Angel Lizana,Andrés Márquez,Claudio Iemmi,Elena Fernández,Juan Campos,María J. Yzuel +6 more
TL;DR: Evidence of the temporal fluctuations of the phase modulation property of a liquid crystal on silicon (LCoS) display is provided, and its effect when the device is used for displaying a diffractive optical element is analyzed.
Journal ArticleDOI
Quantitative prediction of the modulation behavior of twisted nematic liquid crystal displays based on a simple physical model
TL;DR: In this article, a method to perform a predictive search for a given amplitude and phase modulation response in twisted nematic liquid crystal displays is presented, based on a simple physical model that considers the effect of liquid-crystal layers located in the vicinity of the edges, which are not able to tilt.
Journal ArticleDOI
Direct generation of accelerating Airy beams using a 3/2 phase-only pattern
TL;DR: This work directly generates the Airy beam using a 3/2 phase pattern encoded onto an LCD, and experimental results show a deflection that depends on the square of the distance from the LCD and match theoretical predictions.
References
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Journal ArticleDOI
Theory and design of the liquid crystal TV as an optical spatial phase modulator
Bahaa E. A. Saleh,Kanghua Lu +1 more
TL;DR: In this article, an expression for the complex amplitude transmittance of the liquid crystal TV (LCTV) and verified experimentally was derived for spatial phase modulation with good linearity, high transmission efficiency, and small intensity distortion.
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Optical-data-processing properties of a liquid-crystal television spatial light modulator.
TL;DR: It is discovered that the extremely inexpensive Radio Shack liquid-crystal television, with proper modifications, has potential for optical-data-processing applications.
Journal ArticleDOI
Determination of the physical properties of an arbitrary twisted-nematic liquid crystal cell
Colin Soutar,Kanghua Lu +1 more
TL;DR: In this paper, an experimental procedure for the determination of the physical properties of an arbitrary twisted-nematic liquid crystal cell was presented, and the results showed that there is significant variation in the birefringence across this cell and the influence that this has on the use of the cell in optical processing systems.
Journal ArticleDOI
Self-organizing optical neural network for unsupervised learning
TL;DR: It is shown that the optical neural network is capable of performing both unsupervised learning and pattern recognition operations simultaneously, by setting two matching scores in the learning algorithm by using a slower learning rate.
Journal ArticleDOI
Full-range, continuous, complex modulation by the use of two coupled-mode liquid-crystal televisions
TL;DR: Switchable, continuous, complex-amplitude modulation is demonstrated with two cascaded, twisted nematic liquid-crystal televisions, both operating in phase- and amplitude-coupled modulation modes.
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