Abstract:
PROBLEM TO BE SOLVED: To provide an optical device that can be easily manufactured.SOLUTION: A variable liquid crystal device for controlling propagation of light passing through a liquid crystal layer uses a frequency-dependent material 1306 to dynamically reconfigure an effective electrode structure 1304 in the device. The frequency of a drive signal that generates an electric field in the device may be varied, and the frequency-dependent material has different charge mobilities for different frequencies. It is supposed that, at a low charge mobility, the frequency-dependent material has little effect on the existing electrode structures, and that, at a high charge mobility, the frequency-dependent material expands the fixed electrode 1304. The frequency-dependent material can be used to change the effective electrode structure and a spatial profile of the electric field, and further, changes optical properties of the liquid crystal, which allows the optical device to be frequency controllable.
Abstract:
PROBLEM TO BE SOLVED: To provide a contact structure which facilitates electric connection between conductive layers in individual tunable liquid crystal optical devices.SOLUTION: A tunable liquid crystal optical device defines an optical aperture and has a layered structure. The device includes a film electrode formed on a surface of a first substrate and covered by a second substrate, and a conductive material, a temporary filler, or a cavity. The conductive material occupies a part in the layered structure, is in contact with the film electrode, is located at an end part of the optical device, and provides an electrical connection surface much larger than a thickness of the film electrode. The temporary filler occupies a part in the layered structure, is in contact with the film electrode, is located at an end part of the optical device, and provides the end part with a surface much larger than the thickness of the film electrode. The cavity is within the layered structure, exposes a part of the film electrode, is located at an end part of the optical device, and provides the end part with a surface in which the film electrode is exposed, much larger than the thickness of the film electrode.
Abstract:
Abstract A liquid crystal optical device is provided. The optical device includes a liquid crystal cell controlling optical properties of light passing there through and has: a liquid crystal layer, a planar electrode located to one side of said liquid crystal layer; an electric field control structure located to the opposite side of the liquid crystal layer; and a wavefront adjustment structure configured to provide optical phase front adjustment. In some embodiments the wavefront adjustment structure is a conductive floating electrode. In other embodiments the wavefront adjustment structure is a weakly conductive layer (WCL) having spatially variable sheet resistance. In other embodiments the wavefront adjustment structure is a weakly conductive structure having spatially variable sheet resistance with a frequency dependent characteristic.
Abstract:
Variable liquid crystal devices for controlling the propagation of light through a liquid crystal layer use a frequency dependent material to dynamically reconfigure effective electrode structures in the device. The frequency of a drive signal that generates an electric field in the device may be varied, and the frequency dependent material has different charge mobilities for the different frequencies. At a low charge mobility, the frequency dependent material has little effect on the existing electrode structures. However, at a high charge mobility, the frequency dependent material appears as an extension of the fixed electrodes, and may be used to change the effective electrode structure and, thereby, the spatial profile of the electric field. This, in turn, changes the optical properties of the liquid crystal, thus allowing the optical device to be frequency controllable.
Abstract:
A liquid crystal optical device is provided. The optical device includes a liquid crystal cell controlling optical properties of light passing therethrough and has: a liquid crystal layer, a planar electrode located to one side of said liquid crystal layer; an electric field control structure located to the opposite side of the liquid crystal layer; and a wavefront adjustment structure configured to provide optical phase front adjustment. In some embodiments the wavefront adjustment structure is a conductive floating electrode. In other embodiments the wavefront adjustment structure is a weakly conductive structure having spatially variable sheet resistance. In other embodiments the wavefront adjustment structure a weakly conductive structure having spatially variable sheet resistance having a frequency dependent characteristic.
Abstract:
Eine variable Flüssigkristall-Optikvorrichtung zum Steuern der Ausbreitung von Licht weist eine oder mehrere transparente Dünnfilm-hochohmige Schicht (HRL) auf, die mit einem Substrat und einer Elektrodenstruktur gekoppelt ist. Die HRL weist eine Kernschicht und eine Deck- oder Näherungsschicht auf, wobei das Kernschichtmaterial eine höhere elektrische Leitfähigkeit und einen höheren Brechungsindex als das Deckschichtmaterial aufweist; Und wobei die Kern- und Deckschichtmaterialien im Wesentlichen die gleichen freien Energien der Oxidbildung aufweisen. Auf diese Weise wird die Elektrodenstruktur umweltstabil und reagiert auf einen angelegten elektrischen Strom, um ein räumlich ungleichförmiges Magnetfeld zu erzeugen.