Properties Of Tunable Nematic Liquid Crystal Retarders

Gilman, Scott; Gallagher, Dennis J.; Shankar, N. K.

doi:10.1117/12.962917

Cited by 11 publications

(3 citation statements)

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“…Liquid crystals (LC’s) have anisotropic optical properties that make them ideal materials from which to construct either passive or active devices that offer polarization, phase, or intensity control. Even though LC’s are commonly associated with the display industry 1 , other common applications include retarders 2 , spatial light modulators (SLM’s) 3 , active lenses 4 , and privacy windows 5 . SLM’s are particularly important devices because of their ability to function as an optical light valve that can be employed in numerous ways, including applications in currently established or emerging applications in the THz regime 6 and development of next-generation metal additive manufacturing via large-aperture laser melting 7 .…”

Section: Introductionmentioning

confidence: 99%

Investigation of parameters governing damage resistance of nematic liquid crystals for high-power or peak-intensity laser applications

Kosc

Kozlov

Papernov

et al. 2019

Sci Rep

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We investigate the damage resistance of saturated and unsaturated liquid crystals (LC’s) under a wide range of laser excitation conditions, including 1053-nm pulse durations between 600 fs and 1.5 ns and nanosecond pulse excitation at 351 nm and 532 nm. This study explores the relationship between the LC’s resistance to laser-induced breakdown (damage) and the electronic structure (π-electron delocalization) of the constituent molecules. The laser-induced damage threshold at all wavelengths and pulse durations was consistently higher in saturated materials than in their unsaturated counterparts. The wavelength’s dependence in the results suggests that the energy coupling process that leads to laser-induced breakdown is governed by the energy separation between the ground state and the first and second excited states, while the pulse duration’s dependence in the results reveals the important role of electron relaxation between the excited states. A qualitative description was developed to interpret the experimental observations.

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Section: Introductionmentioning

confidence: 99%

Investigation of parameters governing damage resistance of nematic liquid crystals for high-power or peak-intensity laser applications

Kosc

Kozlov

Papernov

et al. 2019

Sci Rep

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“…Polarization generator is an indispensable part of polarization imaging system, in order to measure the instrument polarization sensitivity and monitor instrument performance requirements change, has the extremely high sensitivity. Laser is a common light source in polarization calibration, therefore, the polarizer , plate or other optical devices are placed in the laser beam path , thus can obtain the required for various polarization state laser beam [1 ].…”

Section: Introductionmentioning

confidence: 99%

Study on polarization generator based on electro-optic modulation

Hu¹,

Lu²,

Niu³

2015

Advances in Intelligent Systems Research

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Polarization state generator is an indispensable part of polarization imaging system, produces the state of polarization for the calibration or test. Based on the analysis of the existing scheme, a novel Polarization State Generator is developed , which is constituted of a linear polarizer P and two liquid crystal phase variable retarders, denoted as LCVR1 and LCVR2. The transmission axes of P and LCVR2 are oriented horizontally, while the fast axes of LCVR2 is oriented. the state of polarization of the incident light is modulated through adjusting the control voltage of LCVRS. the experimental results show that the system not only is feasible ,but also has high sensibility. A good agreement is observed between theoretical and experimental results.

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“…Such optics for accurate quantification of the incident wave front phase modulation capability relates to the ability to realize the above-mentioned applications and is very hard to be measured and quantified accurately restricted by measurement method. There are many detection methods for modulation phase of liquid crystal retarders [1]- [4]. For Liquid Crystal Spatial Light Modulator and LC-lens optical devices, double-slit interference method and Mach-Zehnder interferometer measurements have some limitations [5]- [8].…”

Section: Introductionmentioning

confidence: 99%

Research on Phase Detection of Liquid Crystal Optical Device

Shi¹,

Yang²,

Yang³

et al. 2014

JAMP

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The technology for phase detection of liquid crystal optical device is a difficult research in current domestic and overseas. However, for the existing liquid crystal optical device, aiming at the poor anti-vibration capability and poor versatile of phase detection, the complexity of phase retrieval algorithm, we propose a new phase measurement principle and experimental methods of liquid crystal optical device. It is a phase measurement method based on the combination of phaseshifting interferometer and phase conjugation technology. The deflection characteristics of the liquid crystal device means the device can implement phase modulation to only one direction of polarized light while is completely transparent to orthogonal polarized light. We put forward the phase shift of the orthogonal polarization phase shift interferometer method, using phase shifting interference as well as the combination of phase conjugate means to achieve its phase measurement. So we can retrieves devices modulation phase simply and efficiently combines with phaseshifting interferometer technology.

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Properties Of Tunable Nematic Liquid Crystal Retarders

Cited by 11 publications

References 0 publications

Investigation of parameters governing damage resistance of nematic liquid crystals for high-power or peak-intensity laser applications

Investigation of parameters governing damage resistance of nematic liquid crystals for high-power or peak-intensity laser applications

Study on polarization generator based on electro-optic modulation

Research on Phase Detection of Liquid Crystal Optical Device

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