摘要:
An ambipolar light-emitting transistor comprising an organic semiconductive zone between an electron injecting electrode and a hole injecting electrode, that is capable of emitting light from the semiconductive zone when operated in a biasing regime in which negative electrons are injected from an electron injecting electrode into the organic semiconductive zone and positive holes are injected from a hole injecting electrode into the organic semiconductive zone.
摘要:
A method is provided for the transmission of digital and radio frequency signals, for example for multiservice applications, over all types of multimode optical fibre link using laser diodes. The method comprises launching optical radiation into the core of the multimode optical fibre, in a manner that restricts the number of excited modes within it. The subset of modes that are excited suppress additional noise due to the presence of a multiplicity of signals, and ensure high quality transmission.
摘要:
A method of displaying a video image comprises receiving sequential image frames at a processor. Each image frame is processed to obtain a kinoform. A programmable diffractive element such as an SLM (206) represents the sequence of kinoforms allowing reproduction (208) of the image using a suitable illumination beam (200, 202).
摘要:
A wavelength control system comprising a wavelength tunable laser, a temperature sensing mechanism and a bias controller responsive to the sensed temperature whereby emission wavelength of the wavelength tunable laser is maintained substantially constant by adjusting the bias applied to the wavelength tunable laser accordingly with temperature.
摘要:
The invention relates to a method of and apparatus for displaying a holographically generated video image having plural video frames. For each frame there is provided and computed (20) a respective sequential plurality of holograms. Each said sequential plurality of holograms of the plural video frames are sequentially displayed on a diffractive element (12) for viewing the replay field thereof, and the noise variance of each frame is perceived as attenuated by averaging across said plurality of holograms.
摘要:
A packet router has an input stage (1), an output stage (15) and a coupling stage (10) for coupling the input and output stages. The input stage has plural input devices, the output stage has plural output devices and the coupling stage provides paths for signals between output elements of the input devices and input elements of the output devices. Each input device has circuitry arranged to respond to packet destination data of a packet received by its input device for adding, to the packet data of the packet, information indicative of a router output node at which the packet is to be output. The router has a controller (20) connected to the input stage and to the coupling stage for causing packets to be output to said coupling stage in dependence on this information. Each output device has circuitry for removing the information prior to output of packets. The router has a connecting device receiving signals from paths of the coupling stage and to transfer the signals to a further output device disposed remote from the input stage.
摘要:
A method (100) and system (300) is described for processing video data comprising a plurality of images. The method (100) comprising obtaining (104, 106), for each of the plurality of images, a segmentation in a plurality of regions and a set of keypoints, and tracking (108) at least one region between a first image and a subsequent image resulting in a matched region in the subsequent image taking into account a matching between keypoints in the first image and the subsequent image. The latter results in accurate tracking of regions. Furthermore the method may optionally also perform label propagation taking into account keypoint tracking.
摘要:
A holographic display has a pixellated (101, 102, 103) hologram display device (100) with a predetermined resolution and a pixellated (121 - 126) phase mask (120) arranged such that holograms displayed on the SLM (100) are viewed through the phase mask, wherein the phase mask has a resolution higher than the predetermined resolution.
摘要:
The present invention relates to a method of producing an ultrahydrophobic surface, the method comprising providing a mixture comprising low surface energy material and a sacrificial material, forming a layer from the mixture wherein the layer contains particles of the sacrificial material, treating the layer so as to destroy the particles of sacrificial material and generate a laterally continuous matrix of solid low surface energy material containing an array of depressions.
摘要:
The present invention relates to a method of producing an ultrahydrophobic surface, the method comprising providing a mixture comprising low surface energy material and a sacrificial material, forming a layer from the mixture wherein the layer contains particles of the sacrificial material, treating the layer so as to destroy the particles of sacrificial material and generate a laterally continuous matrix of solid low surface energy material containing an array of depressions.