164 results about "Optical space" patented technology

A lidar-based apparatus and method are used for the solid state steering of laser beams using Photonic Integrated Circuits. Integrated optic design and fabrication micro- and nanotechnologies are used for the production of chip-scale optical splitters that distribute an optical signal from a laser essentially uniformly to an array of pixels, said pixels comprising tunable optical delay lines and optical antennas. Said antennas achieve out-of-plane coupling of light.As the delay lines of said antenna-containing pixels in said array are tuned, each antenna emits light of a specific phase to form a desired far-field radiation pattern through interference of these emissions. Said array serves the function of solid state optical phased array.By incorporating a large number of antennas, high-resolution far-field patterns can be achieved by an optical phased array, supporting the radiation pattern beam forming and steering needed in solid state lidar, as well as the generation of arbitrary radiation patterns as needed in three-dimensional holography, optical memory, mode matching for optical space-division multiplexing, free space communications, and biomedical sciences. Whereas imaging from an array is conventionally transmitted through the intensity of the pixels, the optical phased array allows imaging through the control of the optical phase of pixels that receive coherent light waves from a single source.

A transmission device includes a first light emission unit having a light source for emitting one optical signal. A reception unit includes an X-Y address system image sensor, having a pixel region including a plurality of pixels, for receiving the optical signal by the pixel region; a classification unit for creating classification information representing a pixel group including pixels, among the plurality of pixels, which are irradiated with the optical signal; and a control unit for controlling the X-Y address system image sensor in accordance with the classification information to simultaneously read signals of the pixels belonging to the pixel group.

The invention provides an optical space transmission device by using an image sensor, aiming at realizing the high-speed communication for improving the signal read-out speed of the image sensor in the optical space transmission device by using the image sensor to reduce the tight optical axis adjustment. The ptical space transmission device transmits the optical signal from a transmission device to a a reception device, where the transmission device includes a first light emission unit having a light source for emitting an optical signal, the reception device including an XY address type image sensor having a pixel domain formed by a plurality of pixels and receiving an optical signal in the pixel domain, a classification unit for creating classification information for classifying pixels to which an optical signal is applied, into pixel groups, and a control unit for controlling the XY address-type image sensor according to the classification information and simultaneously reading out signals of pixels belonging to a pixel group.

The present invention is directed to an optical space switch accommodating a plurality of input light paths and output light paths. The optical space switch comprises a plurality of polarization control optical switches, each consisting essentially of: polarization control means having elements, one for each input light path, for rotating through 90 DEG the polarizing direction of light information incident from each input light path or otherwise retaining the polarizing direction thereof for output; and a light path routing element for routing the light path for the light information output from the polarization control means in accordance with the polarizing direction of the light information. These polarization control optical switches are arranged in a matrix pattern or coupled in cascade to implement a polarization control optical space switch.

A surface emitting semiconductor laser includes a substrate, a lower reflective mirror formed on the substrate, an active layer formed on the lower reflective mirror, an upper reflective mirror formed on the active layer, an optical mode controlling layer formed between the lower reflective mirror and the upper reflective mirror, and a current confining layer formed between the lower reflective mirror and the upper reflective mirror. The active layer emits light. The upper reflective mirror forms a resonator between the lower reflective mirror and the upper reflective mirror. In the optical mode controlling layer, an opening is formed for selectively absorbing or reflecting off light that is emitted in the active layer. The optical mode controlling layer optically controls mode of laser light. The current confining layer confines current that is applied during driving.

The invention proposes an interference cancellation method of a visible light communication system. The visible light communication is most vulnerable to be interfered by the environmental light, the invention adopts an optical space division method to separate an interference source and a communication light source on a photoelectric sensor, then a background interference value is obtained by using the time-related sampling and the space-related sampling, after that, the background interference value is subtracted from the output of the data signal according to the function weight, so as to offset the impact of the background light.

An optical axis correcting apparatus for correcting the optical axes of light beams from a communicating party in an optical space transmission system that transmits and receives the light beams to / from the communicating party, comprises, in order to further accurately correct an optical axis with a simple configuration, optical axis changing means for changing the angle of a reflecting mirror placed in the optical path of the light beam and for changing the optical axis of the light beam to be reflected by the reflecting mirror, optical axis direction detecting means for detecting the direction of the optical axis of the light beam that is changed by the optical axis changing means, optical axis adjusting means for adjusting the angle of the reflecting mirror based on the direction of optical axis of the light beam detected by the optical axis direction detecting means through the optical axis changing means in order to adjust the direction of the optical axis of the light beam toward the communicating party, and correction means for detecting a change of angle occurred in the reflecting mirror owing an oscillation applied to the reflecting mirror and for correcting the angle of the reflecting mirror based on the detected result.

An electro-optic beam controller, material processing apparatus, or optical amplifier, and corresponding methods, can include an actively controlled, waveguide-based, optical spatial mode conversion device. The conversion device can include a coupler, which can be a photonic lantern, configured to combine light beams into a common light beam; a sensor configured to measure at least one characteristic of the common light beam; and a controller configured to modulate optical parameters of the individual, respective light beams to set one or more spatial modes of the common light beam. Actively controlled and modulated devices can be used to maintain a stable, diffraction-limited beam for use in an amplification, communications, imaging, laser radar, switching, or laser material processing system. Embodiments can also be used to maintain a fundamental or other spatial mode in an optical fiber even while scaling to kilowatt power.

A lidar-based apparatus and method are used for the solid state steering of laser beams using Photonic Integrated Circuits. Integrated optic design and fabrication micro- and nanotechnologies are used for the production of chip-scale optical splitters that distribute an optical signal from a laser essentially uniformly to an array of pixels, said pixels comprising tunable optical delay lines and optical antennas. Said antennas achieve out-of-plane coupling of light.As the delay lines of said antenna-containing pixels in said array are tuned, each antenna emits light of a specific phase to form a desired far-field radiation pattern through interference of these emissions. Said array serves the function of solid state optical phased array.By incorporating a large number of antennas, high-resolution far-field patterns can be achieved by an optical phased array, supporting the radiation pattern beam forming and steering needed in solid state lidar, as well as the generation of arbitrary radiation patterns as needed in three-dimensional holography, optical memory, mode matching for optical space-division multiplexing, free space communications, and biomedical sciences. Whereas imaging from an array is conventionally transmitted through the intensity of the pixels, the optical phased array allows imaging through the control of the optical phase of pixels that receive coherent light waves from a single source.

A VCSEL includes a first conductivity-type first semiconductor mirror layer on a substrate, an active region thereon, a second conductivity-type second semiconductor mirror layer thereon, and a current confining layer in proximity to the active region. A mesa structure is formed such that at least a side surface of the current confining layer is exposed. The current confining layer includes a first semiconductor layer having an Al-composition and a second semiconductor layer having an Al-composition and being formed nearer to the active region than the first semiconductor layer does. Al concentration of the first semiconductor layer is higher than that of the second semiconductor layer. When oscillation wavelength of laser light is λ, optical thickness being sum of the thickness of the first and second semiconductor layers is λ / 4. The first and second semiconductor layers are selectively oxidized from the side surface of the mesa structure.

Techniques, devices and systems are disclosed for characterizing particles in a fluid sample by optical space-time coding. In one aspect, a microfluidic device for optical detection of particles includes a substrate, a microfluidic channel formed on the substrate and structured to carry a fluid sample containing particles, in which the microfluidic channel is structured to transmit a probe light, and a mask formed on one side of the microfluidic channel and structured to include a pattern of openings along the microfluidic channel, in which at least two of the openings have varying dimensions across the microfluidic channel, and in which the pattern of openings encodes a waveform on the probe light that transmits through the microfluidic channel to allow optical detection of a position of a particle in the microfluidic channel.

An optical space transmission device includes: a first portion; and a second portion which is rotatably connected to the first portion and performs space transmission of signals using light between the first portion and the second portion. The device includes: a first light emitting and receiving module which is provided for the first portion and includes: a first light emitting element composed of a light emitting diode emitting first signal light modulated based on a signal transmitted from the first to second portion; and a first light receiving element receiving second signal light modulated based on a signal transmitted from the second to first portions; and a second light emitting and receiving module which is provided for the second portion and includes: a second light emitting element composed of a semiconductor laser emitting the second signal light; and a second light receiving element receiving the first signal light.

An optical switching system is implemented by providing a transmitting section with a preparatory transmitted optical signal selector and a working transmitted optical signal splitter, which are each implemented by a 1x2 optical space switch, and by providing a receiving section with a receiving optical switch which is implemented by a 2x2 optical space switch, and with a preparatory receiving optical gate which is implemented by a 1x2 optical space switch. This makes it possible to switch between the working system and preparatory system without employing any 4x4 optical space switch, thereby implementing a practical optical switching system without causing such problems as communication interruption during maintenance or impairment of transmission path working efficiency.

The invention provides an optical space transmission system using visible light and infrared light. There are included a first modulating part that subjects a first data to a low-speed digital modulation; a second modulating part that subjects a second data to a high-speed digital modulation; a first light transmitting part that emits / quenches a visible light in accordance with an output signal from the first modulating part to transmit a visible-light signal conveying the first data; and a second light transmitting part that changes the intensity of the infrared light in accordance with an output signal from the second modulating part to transmit an infrared-light signal, which conveys the second data, in parallel with the visible-light signal.

The invention provides a telescopic truss type binary optical space camera and an on-orbit work method thereof and belongs to the field of spaceflight space repeatable unfolding. The telescopic truss type binary optical space camera aims to solve the problems that an existing space foldable and spreadable framework type supporting arm is complicated in structure, heavy and difficult to repeatedly fold and unfold. A partitioned type spreadable optical main lens of the telescopic truss type binary optical space camera is installed on a supporting arm through three ball hinges. The supporting arm comprises multiple framework type foldable units. The on-orbit work method comprises the steps that during launching, the supporting arm and the partitioned type spreadable optical main lens are in a folded mode, and the optical camera is in a launch closed mode; after injection, the supporting arm is switched to a unfolding mode and is unfolded; after the supporting arm is unfolded appropriately, the space camera is switched to an on-orbit operation mode, and the partitioned type spreadable optical main lens is unfolded; when the space camera is switched to an on-orbit closed mode, the supporting arm is folded, and the partitioned type spreadable optical main lens is unfolded. The telescopic truss type binary optical space camera is a large-caliber space camera.

An optical-space transmission apparatus for use in communication by using light propagating in a space includes a light-receiving unit, an optical system including a movable mirror and introducing light incident thereon to the light receiving unit with the movable mirror, a controller controlling drive of the movable mirror, and a detecting unit detecting an intensity of the light received in the light-receiving unit. The controller modifies a control characteristic of the movable mirror in accordance with a change in the received-light intensity.

In an image display apparatus, an image data supply means is readily connected with an image display means through a channel, which are installed at positions remote from each other. The present invention provides an image data supply means for supplying image data, an optic-spatial transmission means on a transmission side for emitting optical beam which is modulated in accordance with the image data, optic-spatial transmission means on a reception side for receiving the optical beam emitted by the optic-spatial transmission means on the transmission side, and demodulating the optical beam to recover the image data, and an image display means for displaying an image based on the image data recovered by the optic-spatial transmission means on the reception side.

In an optical space communication system, a remote controller is provided at an arbitrary position remote from an optical space communication apparatus. The optical space communication apparatus is provided with an interface device for exchanging status information of the operating apparatus, operation start setup / manipulation information or operating setup / manipulation information of the apparatus with the interface device. Communication between the remote controller and the interface device is made for a transmission light power, a transmission signal power, a reception light power, a reception signal power, a light beam transmission angle, a temperature of a predetermined portion in the apparatus, an angular error between the reception light and an optical axis of a light reception unit in the apparatus, a transmission light beam divergence angle or the like.

The present invention,is directed to an optical space switch accommodating a plurality of input light paths and output light paths. The optical space switch comprises a plurality of polarization control optical switches, each consisting essentially of: polarization control means having elements, one for each input light path, for rotating through 90° the polarizing direction of light information incident from each input light path or otherwise retaining the polarizing direction thereof for output; and a light path routing element for routing the light path for the light information output from the polarization control means in accordance with the polarizing direction of the light information. These polarization control optical switches are arranged in a matrix pattern or coupled in cascade to implement a polarization control optical space switch.

There included are a plurality of light receiving sections (121, 122) for receiving a plurality of optical signals (R1, R2) and respectively converting the received optical signals to a plurality of electrical signals (r1, r2); a first calculating section (130) for subjecting the plurality of electrical signals (r1, r2) to a process of canceling interference components occurring due to propagation of the plurality of optical signals through space; and a second calculating section (140) for calculating, with respect to each of the plurality of electrical signals whose interference components have been canceled by the first calculating section, whether or not a distortion occurring due to optical beat interference has a value less than or equal to a predetermined permissible value.

The invention belongs to the technical field of optical space communication, particularly relates to an ultra narrow band excited state faraday anomalous dispersion atom filter of a communication band, and aims at effectively improving the pumping efficiency of the excited state atom filter and overcoming the problems of complicated light path, high demands on an environmental condition, poor adaptability and low practicability caused by a pump laser frequency stabilization module. An external frequency stabilization module is removed by the filter while an Rb atomic vapor absorption peak inside the filter is utilized as a frequency standard. Thus, the ultra narrow band excited state faraday anomalous dispersion atom filter is simpler in structure, better in work stability and higher in efficiency. The scheme is combined with a generation principle of a multi-transition absorption band, and the targeted frequency stabilization mod is adopted, so that a good pumping effect can be obtained.

Optical solutions to address and overcome the issues of superseding / replacing electrical interconnection networks have generally exploited some form of optical space switching. Such optical space switching architectures required multiple switching elements, leading to increased power consumption and footprint issues. Accordingly, it would be beneficial for new optical, e.g. fiber optic or integrated optical, interconnection architectures to address the traditional hierarchal time-division multiplexed (TDM) space based routing and interconnection to provide reduced latency, increased flexibility, lower cost, and lower power consumption. Accordingly, it would be beneficial to exploit networks operating in multiple domains by overlaying mode division multiplexing to provide increased throughput in bus, point-to-point networks, and multi-cast networks, for example, discretely or in combination with wavelength division multiplexing.

An optical space communication reception circuit receives a signal in switched-over communication speed modes and under settings corresponding to the communication speed modes. Receiver sensitivity in the respective communication speed modes is set in advance such that maximum communicable distances in the communication speed modes are substantially equal. By this, it becomes possible, for example, in optical space transmission such as infrared communication and the like to enhance a false operation prevention characteristic against disturbance noise, without decreasing maximum communicable distances.

The invention discloses a layered optical spatial modulation method suitable for a turbulent flow channel. The layered optical spatial modulation method mainly comprises layered optical space modulation layer mapping and bit mapping methods, receiving end signal detection and demapping and layered optical space modulation system bit error rate upper bound calculation. The layer mapping is to divide input bit information into two layers, the bit mapping is to determine an LD serial number and a pulse amplitude or a pulse position activated by each layer according to a mapping rule, and two lasers modulated by PPM and PAM are activated at the same time to send information; and the receiving end adopts a maximum likelihood decoding detection algorithm to complete detection of the laser serialnumber and the digital modulation signal, and the transmitting end bit information can be recovered after corresponding reflection and emission. On this basis, the upper bound of the bit error rate of layered optical space modulation is derived. The construction of the layered light space modulation system effectively improves the spectrum efficiency and transmission rate of the system.

Provided is an optical space transmitter and an optical space transmission method, for wavelength-multiplexed light, capable of obtaining a wavelength-multiplexed signal by multiplexing optical signals having a plurality of wavelengths with a simple configuration and without requiring highly precise adjustment for optical axes and enhancing safety for a human body, including, e.g., the eyes. The transmitter has a configuration for which light sources (101a, 101b) for outputting signal lights having wavelengths different from each other are arranged so as to irradiate an approximately identical portion of a diffusion plate (104), a diffuse light outputted from the diffusion plate (104) is converted, by a radiation lens (105), into a light traveling with an angle suitable for transmission in a free space, and the converted light is passed out to the free space. Accordingly, without requiring a highly precise adjustment for optical axes, it is possible to realize a wavelength multiplexing optical space transmitter operable to multiplex optical signals having wavelengths different from each other based on a coincided optical axis, and to reduce risk of eye injury.

An optical-space transmission apparatus for use in communication by using light propagating in a space includes a light-receiving unit, an optical system including a movable mirror and introducing light incident thereon to the light receiving unit with the movable mirror, a controller controlling drive of the movable mirror, and a detecting unit detecting an intensity of the light received in the light-receiving unit. The controller modifies a control characteristic of the movable mirror in accordance with a change in the received-light intensity.

This invention relates to a secure QrCode communication method based on nonlinear spatial frequency characteristics, comprising: camera modeling: modeling according to the spatial frequency of the color filter matrix of the scanning device's camera; QrCode encryption: using the CFA spatial frequency of scanning device and modeling results, as well as the spatial frequency of the display device, generate an encrypted picture of the target QrCode on the display device; QrCode decryption: the camera of the scanning device takes the picture of the display at a specified position and a specified angle, and parses the image to recover the target QrCode. Compared with the prior art, the present invention utilizes the nonlinear characteristics of the optical spatial frequency, and uses the spatial frequency of the camera's own color filter array and the spatial frequency of the display to modulate the target two-dimensional code through phase to achieve the effect of encryption.

Photoelectron emission mapping systems for use with EUV (extreme ultraviolet) mask inspection and lithography systems are described. The mapping systems may be used to provide photoelectron emission maps for EUV photolithography masks and / or EUV mirrors. The systems use EUV photoelectron sources used for mask inspection or photolithography to impinge EUV light on the masks and / or mirrors. The EUV light generates photoelectron on the surfaces of the mask and / or mirrors and the photoelectrons are collected and analyzed by detectors placed away from optical spaces of the EUV chamber.

A multi-point fitting demarcate method about space location and figure of projection configuration light belongs to optical technology field. Inside effective range to angular field of configuration light three-dimensional imaging system, projector brings projection configuration light; change space position of the referenced surface time after time then two-dimensional imaging equipment takes pictures to space camber and referenced surface of projection configuration light and input into computer. It changes the relationship between the method of Field and Value and the space position to work out the coordinate value of multi-point on many lines intersecting with each other, inside the coordinate system to configuration light projection three-dimensional imaging system. Then get high precise demarcate of configuration light space position and figure by multi-point fitting. It is easy and handy to operate and suitable to locating demarcation and debugging for configuration light projection three-dimensional imaging system.