Journal ArticleDOI
Electrically switchable volume gratings in polymer‐dispersed liquid crystals
Richard L. Sutherland,Vincent P. Tondiglia,Lalgudi V. Natarajan,Timothy J. Bunning,W. Wade Adams +4 more
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In this article, the authors reported electrical switching of the diffraction efficiency in volume Bragg gratings written holographically in polymer-dispersed liquid crystals (PDLCs).Abstract:
We report electrical switching of the diffraction efficiency in volume Bragg gratings written holographically in polymer‐dispersed liquid crystals (PDLCs). Scanning electron microscopy confirms the volume nature of the gratings and shows that they consist of periodic PDLC planes. The diffraction efficiency can be switched from a high value (∼50%) to a value near zero at fields ∼11 V/μm.read more
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Fundamentals of Liquid Crystal Devices
Shin-Tson Wu,Deng-Ke Yang +1 more
TL;DR: In this article, the authors present a model of liquid crystal display matrices, drive schemes and bistable displays, as well as a detailed analysis of the effects of electric fields on liquid crystal properties.
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A Review of Phased Array Steering for Narrow-Band Electrooptical Systems
Paul F. McManamon,Philip J. Bos,Michael J. Escuti,Jason Heikenfeld,Steve Serati,Huikai Xie,Edward A. Watson +6 more
TL;DR: Multiple nonmechanical steering approaches are developing that will allow high-efficiency steering, excellent steering accuracy, and wide fields of view, similar to microwave radar phased arrays.
Patent
Method of and apparatus for viewing an image
TL;DR: In this paper, a dynamic optical element (12) is used as a lens to follow the eye gaze as its direction alters, and the dynamic lens is controlled in dependence on this to create an area of high resolution centred on the direction of gaze.
A Review of Phased Array Steering for Narrow-Band Electrooptical Systems Rapid, accurate, non-mechanical techniques for steering optical beams can provide the kind of efficient random access pointing offered by microwave radars.
Paul F. McManamon,Philip J. Bos,Michael J. Escuti,Jason Heikenfeld,Steve Serati,Huikai Xie,Edward A. Watson +6 more
TL;DR: In this paper, the authors compared the performance of the combined liquid crystal and step-steering approach with a variable birefringent grating approach and compared it with the conventional liquid crystal approach.
Patent
Switchable optical components
TL;DR: In this article, a number of components, devices and networks involving integrated optics and/or half coupler technology, all of which involve the use of electronically switchable Bragg grating devices and device geometries realized using holographic polymer/dispersed liquid crystal materials.
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Journal ArticleDOI
Field controlled light scattering from nematic microdroplets
TL;DR: In this article, the light scattering and electro-optic response of new material with display potential are investigated, which consist of microdroplets of nematic liquid crystals which are spontaneously formed in a solid polymer at the time of its polymerization.
Journal ArticleDOI
Diffraction analysis of dielectric surface-relief gratings
M. G. Moharam,Thomas K. Gaylord +1 more
TL;DR: In this article, a dielectric surface-relief grating is analyzed using rigorous coupled-wave theory and the analysis applies to arbitrary grating profiles, groove depths, angles of incidence, and wavelengths.
Journal ArticleDOI
Bragg gratings in an acrylate polymer consisting of periodic polymer-dispersed liquid-crystal planes
Journal ArticleDOI
Hologram Recording With A New Photopolymer System
R. T. Ingwall,H. L. Fielding +1 more
TL;DR: In this paper, a new photopolymer system, Polaroid DMP-128, is described for holographic recording with either blue (442 nm, 488 nm), green (514 nm), or red (633 nm, 647 nm) laser light.