Journal Article10.1364/AO.32.002222
Liquid-crystal phase modulator for unpolarized light.
122
TL;DR: A simple method for phase modulating unpolarized light with a double pass through a nematic liquid crystal retarder is described.
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Abstract: A simple method for phase modulating unpolarized light with a double pass through a nematic liquid crystal retarder is described.
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Citations
Cancellation of simple optical anisotropies without use of a Faraday mirror
TL;DR: A simple liquid crystal device is described that behaves, in reflection, as an isotropic medium whose refractive index can be varied by application of an electric field, thus acting as a phase only modulator for light in any polarization state.
Impact of Liquid Crystals in Active and Adaptive Optics
TL;DR: The use of liquid crystals as active and dynamic modulators of light has been one of major contributions of liquid crystal to Optics as discussed by the authors, and the development of new materials is the key to continued progress in this field.
Experimental validation of closed-loop adaptive optics based on a self-referencing interferometer wavefront sensor and a liquid-crystal spatial light modulator
Fuzhong Bai,Changhui Rao +1 more
TL;DR: In this article, a closed-loop adaptive optics system based on a self-referencing interferometer wavefront sensor (SRI WFS) using phase-shifting point-diffraction technique and an electrically addressed phase-only liquid-crystal spatial light modulator (LC SLM) is built and validated experimentally.
Polarization-Independent Optical Broadband Angular Selectivity
TL;DR: In this paper, the authors generalized the broadband angular selectivity to both polarizations and demonstrated that the performance of the proposed method was comparable to that of the one-dimensional linear model.
Control optimization of spherical modal liquid crystal lenses
TL;DR: Results of a simulation of control signals that have a range of harmonics that are switchable lenses with a continuous phase variation across the lens and experimental results showing a liquid crystal lens varying its focal length are presented.
References
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S. Pancharatnam
- 01 Apr 1955
TL;DR: In this paper, an achromatic quarter-wave plate is obtained by superposing three birefringent plates of the same material; the first and last should have the same retardation 2δ1 their fast vibration directions being parallel to one another but inclined at a specific angle c to that of the central plate-of retardation π.
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Adaptive optics wavefront corrector using addressable liquid-crystal retarders: II
Domenico Bonaccini,Guido Brusa,Simone Esposito,Piero Salinari,P. Stefanini,Valdemaro Biliotti +5 more
- 01 Nov 1990
TL;DR: In this paper, the authors investigated the feasibility of a wavefront corrector for adaptive optics, using nematic liquid crystal material, in order to improve the imaging quality of existing and new-generation telescopes.
17
The application of Edser-Butler fringes to the measurement of the spatial optical structure of liquid crystal prisms and the determination of dispersion characteristics and thickness
Gordon D. Love,J. V. Major +1 more
TL;DR: In this article, a method for determining the dispersion and thickness of a thin film based on a spectroscopic technique using Edser-Butler fringes was proposed for birefringent media, in particular liquid crystals.
8
MARTINI: system operation and astronomical performance
TL;DR: The MARTINI adaptive optics system has been engineered for regular astronomical observations on the 4.2 m William Herschel Telescope on La Palma and the prospects for spectroscopic observations with this class of system are outlined.
6
Evolution of light beams in polarization and direction
TL;DR: In this paper, the authors discuss ± π phase jumps associated with the geometric part of the phase change in the evolution of a spin -1/2 particle and describe some useful results in polarization optics including some obtained by this method.