864 results about "Optical field" patented technology

The present invention provides a multi-touch position tracking technique and an interactive system and a multi-touch interactive image processing method using the same. In the present invention, a light guide element is designed to comprise frustrating structures to frustrate total internal reflection (TIR) so that the light beam therein can be dispersed to form a dispersed optical field distribution. The dispersed optical field is used to respond a physical relation between an object and the light guide element.

Disclosed herein is a scanning ladar transmitter that employs an optical field splitter / inverter to improve the gaze characteristics of the ladar transmitter on desirable portions of a scan area. Also disclosed is the use of scan patterns such as Lissajous scan patterns for a scanning ladar transmitter where a phase drift is induced into the scanning to improve the gaze characteristics of the ladar transmitter on desirable portions of the scan area.

An optical projection tomography system is illuminated with a light source. An object-containing tube, a portion of which is located within the region illuminated by the light source, contains an object of interest that has a feature of interest. A detector is located to receive emerging radiation from the object of interest. A lens, including optical field extension elements, is located in the optical path between the object region and the detector, such that light rays from multiple object planes in the object-containing tube simultaneously focus on the detector. The object-containing tube moves relatively to the detector and the lens operate to provide multiple views of the object region for producing an image of the feature of interest at each view.

There is a need to prevent two receivers from converging on a state of receiving the same polarization state, fast start receivers, and ensure highly reliable operations. A polarization-multiplexed transmitter previously applies frequency shifts of frequencies +Δf and −Δf to X-polarization and Y-polarization digital information signals to be transmitted. Optical field modulators modulate and polarization-multiplex the signals. As a result, a frequency difference of 2Δf is supplied to X-polarization and Y-polarization components. A polarization diversity coherent optical receiver 215 receives the signal. A frequency estimation portion in a digital signal processing circuit detects a frequency difference signal in both polarization components. This signal is used to a polarization splitting circuit in the digital signal processing circuit.

Disclosed herein is a scanning ladar transmitter that employs an optical field splitter / inverter to improve the gaze characteristics of the ladar transmitter on desirable portions of a scan area. Also disclosed is the use of scan patterns such as Lissajous scan patterns for a scanning ladar transmitter where a phase drift is induced into the scanning to improve the gaze characteristics of the ladar transmitter on desirable portions of the scan area.

An electro-optic modulator is formed on a silicon-on-insulator (SOI) rib waveguide. An optical field in the modulator is confined by using an electrically modulated microcavity. The microcavity has reflectors on each side. In one embodiment, a planar Fabry-Perot microcavity is used with deep Si / SiO2 Bragg reflectors. Carriers may be laterally confined in the microcavity region by employing deep etched lateral trenches. The refractive index of the microcavity is varied by using the free-carrier dispersion effect produced by a p-i-n diode formed about the microcavity. In one embodiment, the modulator confines both optical field and charge carriers in a micron-size region.

A device contains at least one wavelength-tunable multilayer interference reflector controlled by an applied voltage and at least one cavity. The stopband edge wavelength of the wavelength-tunable multilayer interference reflector is preferably electrooptically tuned using the quantum confined Stark effect in the vicinity of the cavity mode (or a composite cavity mode), resulting in a modulated transmittance of the multilayer interference reflector. A light-emitting medium is preferably introduced in the cavity or in one of the cavities permitting the optoelectronic device to work as an intensity-modulated light-emitting diode or diode laser by applying an injection current. The device preferably contains at least three electric contacts to apply forward or reverse bias and may operate as a vertical cavity surface emitting light-emitter or modulator or as an edge-emitting light emitter or modulator. Using a multilayer interference reflector containing tunable section allows also obtaining a wavelength-tunable laser or a wavelength-tunable resonant cavity photodetector in the case where the optical field profile in the active cavity or cavities is affected by the stopband wavelength shift. Adding additional modulator sections enables applications in semiconductor optical amplifiers, frequency converters or lock-in optical amplifiers.

A LADAR system includes a detector optical arrangement defining a current optical field of view. An illumination subsystem without moving parts transmits pulsed illumination at different times to each of a number of illumination sub-regions of the current optical field of view, and a detection subsystem, including one or more detectors, detects reflected illumination from a corresponding one or more detection sub-region of the current optical field of view. Each of the detection sub-regions overlaps illumination sub-regions so that an overlap of each of the illumination sub-regions with the detection sub-region defines a LADAR image pixel of resolution finer than the detection sub-region.

A method for measuring regions of a tooth in a mouth including: measuring at least one surface point on a surface of the tooth with respect to an element mechanically coupled to said surface point; determining a location of at least one visible reference mechanically coupled to said surface point with respect to said element; estimating a location of said surface point with respect to said visible reference. A device used for such measuring may include a main body comprising a final optical element of an imager which defines an optical field of view directed in a first direction; and a measurement element coupled to said main body extending generally in said first direction; where a tip of said measurement element is sized and shaped to be inserted between a tooth and adjacent gingiva; where said optical field of view is sized to image at least part of a tooth.

One embodiment of the present invention includes an optical cavity, a source to provide light to the optical cavity, a sensor to detect the light and generate a corresponding sensor signal, and a servo device including a feedforward input and a feedback input. Feedback from the sensor signal is provided to the servo device to regulate operation of the source at a frequency selected to generate an optical field resonating in the first mode in the cavity. An input device provides a control signal to a control input of the servo device that selectively alters operation of the light source to corresponding halt resonance in the first mode. An evaluation device is also included to evaluate decay of the optical field after resonance in the first mode is halted.

The invention belongs to an optical field and particularly relates to a light source module, a liquid crystal display device comprising the light source module, and a neon lamp display device comprising the light source module. The light source module comprises a light-emitting unit and a light guide board; the light guide board comprises a main body and lattice points arranged on the main body; a quantum dot material is doped in the lattice points; the quantum dot material is stimulated by light of a light-emitting unit to emit light with a specific wavelength. The display color gamut of the liquid crystal display device applying the light source module and the neon lamp display device can be greatly improved.

The invention discloses a visual computing-based optical field imaging device and method. The visual computing-based optical field imaging device comprises an optical imaging system, an integrated near-infrared light source, a data transmission module, a high-capacity cache unit, a human-machine interaction device, a logic control unit and a processing unit. The invention provides an optical field imaging device based on a computing and imaging interactive mutual-beneficial mode; and with optical field imaging as the leading and deep perception and high-dynamic range imaging as the assistance, visual perception intelligent and visual cognition precision are realized, novel visual information with characteristics of large depth-of-field, wide dynamic range, actual three dimension, high resolution and capability of collecting and editing is obtained, and accuracy and robustness of a visual computing task are improved through data innovation of a visual perception source; and the optical field imaging device is widely applied to the fields of internet of things, security monitoring and control, biological recognition, intelligent transportation system, aerial remote sensing, digital medical treatment, animation media and the like.

A digital version of both amplitude and phase of at least one generic polarization component of a received optical signal is developed using dual-polarization direct differential detection with digital signal processing. The received signal is split into orthogonal polarization components, each of which is split into three copies. For each orthogonal polarization component a) an intensity profile is conventionally obtained using a copy and b) phase information is obtained by supplying each remaining copy to a respective one of a pair of optical delay interferometers having orthogonal phase offsets, followed by respective balanced intensity detectors. The outputs the balanced intensity detectors and the intensity profiles are converted into digital representations and used to develop, via signal processing, the optical field information of at least one generic polarization component of the received optical signal. Compensation of impairments, such as PMD, is realized through further processing.

Methods and apparatus for reducing the coherence of an optical signal that is used to interrogate optical interferometric sensors are disclosed. The optical field phasor of the interrogation source is modulated in a controlled manner to produce a broadened optical source power spectrum at the output of the source unit. The output from the source unit is launched into an optical sensor network, comprising a multiple of optical pathways from its input to the detection unit, where pairs of optical pathways form sensor interferometers. A compensating interferometer with delay difference similar to the sensor delay difference may be arranged in a serially coupled manner with the optical sensor network, either before or after the network. The optical output power from the source unit may either be continuous or pulsed with a pulse duration similar to the sensor delay. The coherence modulation may be performed through direct modulation of the source or through external modulation of the light with piezoelectric ring modulator, a Lithium niobate phase or intensity modulator, or an acoustooptic modulator.

An optical field receiver comprises an optical branching circuit for branching a received optical multilevel signal into first and second optical signals, a first optical delayed demodulator for performing delayed demodulation on the first optical signal at a delay time T (T=symbol time), a second optical delayed demodulator for performing delayed demodulation on the second optical signal at the delay time T with an optical phase difference deviating from the first optical delayed demodulator by 90°, first and second optical receivers for converting each of the delayed demodulation signals representing x and y components of complex signals output from the first and second delayed demodulators into first and second electrical signals, and a field processing unit fort generating a first reconstructed signal representing an inter-symbol phase difference or a phase angle of a received symbol from the first and second electrical signals for each symbol time T.

The invention relates to a two-dimensional compression ghost imaging system based on coincidence measurement. The two-dimensional compression ghost imaging system comprises a laser, rotating frosted glass, an object, a spatial light modulator, a first set of convergent optical absorption lens, a second set of convergent optical absorption lens, a first point detector, a second point detector, a coincidence measurement circuit and an algorithm module, wherein laser emitted by the laser irradiates the frosted glass to produce pseudo calorescence which is divided into an object arm optical path and a reference arm optical path; on the object arm optical path, an optical field of the pseudo calorescence is spread to the object, and the total light intensity is collected through the first set of convergent optical absorption lens and the first point detector; on the reference arm optical path, the optical field of the pseudo calorescence is spread to the spatial light modulator, and after modulation, the total light intensity is collected through the second set of convergent optical absorption lens and the second point detector; the coincidence measurement circuit is used for carrying out coincidence measurement on the total light intensity of the object arm optical path and the reference arm optical path and outputting coincidence measurement values, and the algorithm module is used for reconstructing the distribution of spatial correlation coefficients according to a measurement matrix and the measurement values by applying a compression perception algorithm.

A camera includes an optical system configured to record images based on light entering the optical system from an optical field of view, a radar system configured to obtain radar information of targets within a radar field of view that is overlapping with the optical field of view, the radar information including one or more of a distance information indicating the distance of targets with respect to the camera, a speed information indicating the speed of targets with respect to the camera and dimension information indicating a dimension of targets, and a control unit configured to control at least one parameter of the optical system based on the obtained radar information.

The invention discloses a multi-mode microimaging method based on programmable LED array illumination. An LED array used as an illumination light source of a microimaging system is directly installed below a sample carrying bench of the microimaging system and the center of the LED array is located at an optical axis of the microimaging system, thereby realizing phase contrast, optical field imaging, and optical dyeing imaging modes. With the method, dyeing microimaging can be realized flexibly and no additional optical element like an annular diaphragm, a microlens array, and a phase plate and the like needs to be added in an imaging light path of a microscopic, so that the system structure is simplified and the cost is substantially reduced.

A portable integrated laser optical target tracker and designator (PILOTT device) in a single housing is provided having a laser designator assembly to produce a focused laser beam that is projected from the housing. A laser energy detector is located in the housing that detects reflected laser energy from any designation source (ground or airborne based), provides steering information, decodes the laser's frequency, and is used as a range finding receiver. The location of the laser energy provides automatic field alignment of the laser designator. An optical magnification scope is mounted in the housing and has an optical field of view that is parallel to and aligned with a beam path defined by the laser beam focusing optics. Any night scope can be added to the system to provide night situational awareness by being shown in the display. A visual electronic display is overlaid with the optical field of view. A main controller communicates with the controller of the laser energy detector and the visual electronic display, as well as a user input in order to control the PILOTT device. This allows the laser designation location to be displayed in the optical field of view, along with other data, for spotting, ranging and / or marking a designated target.

The invention provides a production method of a basement for enhancing the raman scattering of a molecule, which comprises following steps of: (1) selecting substrate material, cleaning and hydrophilically treating; (2) producing a micro nanometer structure layer on the surface of the substrate; (3) metallizing the micro nanometer structure layer to obtain the substrate with a nanometer metal structure; (4) decorating the surface of the substrate obtained by the step (3) to obtain a surface decoration layer, wherein the surface decoration is preparation of a gas sensitivity interface or a molecule biological film or an adsorbed film or a surface activated material according to the property of the molecule to be tested to improve the property of the basement to enrich the molecule to be tested and the action for activating the basement; (5) adding the molecule to be tested on the substrate with a surface decoration layer; and (6) changing external medium environment around the substrate to improve the enhancement effect of the raman scattering of the molecule to be tested. The external medium environment around the substrate comprises circumambient environment material, or excitation wave length, or optical field distribution or magnetic field distribution. The production method can be used for high sensitivity test; and the substrate has the advantages of high controllability,consistency, repeatability, stability and the like.

Methods and apparatus (100) for composing, generating and transmitting information-bearing optical signals are provided. An information-bearing electrical signal is composed (108) having desirable spectral properties, preferably configured to ensure that undesired interference between electrical spectral components generated in a square-law direct detection process (120) at a corresponding optical receiver (104) is substantially avoided. Predistortion (110) is advantageously applied to transmitted signals, in order to account for a nonlinear relationship arising in a modulation process (114) between electrical signal amplitude and corresponding optical field amplitude. Orthogonal frequency division multiplexing (OFDM) techniques may be applied to composed signals having the desired characteristics, and additionally may facilitate the application of frequency domain equalisation (128) in order to mitigate transmission impairments, including dispersion. Improvements in received signal quality, and / or transmission distance, may thereby be achieved, along with simplification of receiver configuration and operation.

A silicon-based electro-optical modulator (30) based on a gate region of the first conductivity formed to partially cover the body region of the second conductivity type, having interposed between the contact portions of the gate region and the body region (12, 10) A relatively thin dielectric layer (10). The modulator may be formed on an SOI platform with a body region formed in a relatively thin silicon surface layer of the SOI structure and a gate region formed with a relatively thin silicon layer (10) overlying the SOI structure. The doping of the control gate and body regions is used to form lightly doped regions above and below the dielectric layer, thereby defining the active region of the device (16). Advantageously, the photoelectric field in the active device region is substantially identical to the free carrier concentration region. Therefore, the application of the modulation signal causes the free carriers on both sides of the dielectric layer to accumulate, deplete or invert simultaneously, resulting in high-speed operation.

The invention discloses an on-chip optical router for hybrid switching, which mainly solves the problems of high communication delay, low network transmission efficiency and low resource utilization rate facing a single exchange mechanism in the existing on-chip optical router. The router comprises an OCS (Optical Circuit Switching) part and an OPS (Optical Packet Switching) part, wherein each part is composed of an electric field module and an optical field module, the OCS electric field module establishes an optical link for the OCS optical field module according to electric link establishing information before transmitting messages, and the OPS electric field module provides control information for the OPS optical field module in a transmitting and switching process of optical packets. The OCS part is used for transmitting the messages for using an OCS switching mechanism, and the OPS part is used for transmitting the messages for using an OPS switching mechanism. The on-chip optical router respectively optimizes performances of different types of messages, has the advantages of less communication delay, high network transmission efficiency and high resource utilization rate, and is suitable for interconnections and communications in an on-chip optical network.

The invention provides a deep learning neural network-based microscopic image three-dimensional reconstruction method and system. The method comprises the following steps of constructing a neural network; obtaining a training set of the neural network; training the neural network according to the training set, thereby obtaining network parameters; and according to the network parameters, performing three-dimensional reconstruction on a to-be-reconstructed object to obtain a reconstructed image. According to the method and the system, an image recovery reconstruction network is obtained through learning of an optical field image and different layers of focus images, so that the three-dimensional reconstruction speed and resolution are increased, and the longitudinal resolution is greatly increased.

The invention relates to a double-random-phase optical color image encryption device and method, which belong to the field of optical image processing technique. The double-random-phase optical color image encryption device comprises an optical image encryption device and an optical image decryption device. The double-random-phase optical color image encryption device has high flexibility by adopting a joint fractional Fourier transform correlator, and the encryption technique based on the joint fractional Fourier transform correlator structure has high safety even if a correct phase mask cannot decrypt the original image information if the position has a slight change due to the translation variability of the fractional Fourier transform. The decryption device can be achieved only by arranging an electronic shutter of the encryption device and using the original illumination parallel light as the light source, and does not generate the optical field distribution conjugated to the encryption process. Based on the parallel processing characteristics of an optical information processing system, the double-random-phase optical color image encryption device can achieve color image encryption and decryption by use of single wavelength. Therefore, the double-random-phase optical color image encryption device has the advantages of simple structure, simplified system, lowered cost, high safe performance, and wide application range, and is convenient in operation.

A system, method and apparatus provide the ability to detect a chemical in an analyte. To detect the chemical, the invention utilizes a laser having an open cavity. A photonic crystal lattice structure having a defect defines a suitable geometry for such a cavity. The analyte is introduced directly into a high optical field of the cavity. Thereafter, the cavity is pumped and an emission from the laser is used to detect the presence of the chemical in the analyte.

A heat-assisted magnetic recording head (HAMR) head includes a magnetic recording head including a recording pole for applying a magnetic recording field on a magnetic recording medium and a return pole magnetically connected to the recording pole to form a magnetic path, a light source for emitting light, and an optical transmission module including an photonic crystal waveguide disposed at a side of the magnetic recording head to guide light incident from the light source and a nano aperture for enhancing an optical field by varying an intensity distribution of the light guided through the photonic crystal waveguide.

The invention relates to an uncooled double-field-of-view infrared optical system and belongs to the technical field of optics. A first positive meniscus lens, a second double-concave negative lens, a diaphragm, a third double-convex positive lens, a fourth double-convex positive lens, a fifth negative meniscus lens and a detector are coaxially arranged from an object space to an image space, wherein the second double-concave negative lens can axially move between the first lens and the diaphragm to form a narrow-field-of-view light path and a wide-field-of-view light path respectively. The system is provided with two optical fields of view, namely a wide field of view and a narrow field of view, wherein the wide field of view is used for target detection, and the narrow field of view is used for target identification; due to an aspheric design, the double-field-of-view optical system has higher degree of freedom, alternative variables for optimization design are increased, and an optical aberration design is easy to obtain high image quality; and because transformation and focusing compensation of the two fields of view are realized due to movement of the same lens, movement mechanisms in the system are reduced, the rest components in the light path are fixed parts which are easy to assemble and debug, and the assembling and debugging difficulty of the system is reduced greatly.