76 results about "Spatial light modulation" patented technology

The invention discloses a free space optical communication system based on a structured optical frequency comb, and belongs to the field of optical communication. Comprising an optical frequency comb generation system, a signal coding system, a spatial light modulation and demodulation system and a signal receiving system. The optical frequency comb generation system is used for modulating input continuous laser into an adjustable optical frequency comb with high repetition frequency, short pulse width and high power; the signal coding system is used for separating the light with different wavelengths in the optical frequency comb, independently coding the light with each wavelength, and finally combining the light with different wavelengths again; the spatial light modulation and demodulation system is used for coupling the Gaussian beam in the optical fiber into a free space and converting the Gaussian beam into structured light, demodulating the structured light after the structured light is transmitted to a receiving end and re-coupling the structured light back to the optical fiber; the signal receiving system is used for receiving and analyzing the optical signals. According to the invention, the optical frequency comb and the structured light are combined, and the problem that optical signals are easily influenced by atmospheric turbulence in free space optical communication can be effectively solved on the premise of ensuring large communication capacity.

The present disclosure provides a light field display method and device. The display method comprises: obtaining light field data; wherein the light field data comprises a plurality of viewpoint images; the viewpoint image comprises a pixel weight parameter; processing the viewpoint image by using an image processing model, determining a target pixel and a non-target pixel according to the processing result; and updating the value of the pixel weight parameter of the target pixel; and determining the calculation order of the light transmittance of each pixel point of each liquid crystal layer of a spatial light modulation array and the value of the light transmittance according to each viewpoint image and the value of the pixel weight parameter of each pixel after being processed by the image processing model. Such a method helps to improve the calculation efficiency and the picture quality of light field display.

The invention provides a spatial light modulation method and system for Gray code coding rearrangement, and relates to the technical field of computational imaging and spatial light modulation. According to the method, a Gray code sequence and a high-performance basic modulation matrix are combined, a basic modulation matrix is constructed according to a target image resolution ratio and a sampling rate, a Gray code index sequence with only one different adjacent indexes is generated, a measurement matrix is obtained by rearranging the matrix through a mapping function, and the measurement matrix is loaded to a spatial light modulator to code a light signal; and the double-path detector collects transmitted and reflected light intensity response and performs differential processing, and inputs a compressed sensing reconstruction algorithm to restore an image. According to the invention, stable and efficient information capture at a low sampling rate is realized, the anti-interference capability and repeatability of the system are improved, the hardware compatibility is strong, the implementation cost is low, and the method is suitable for the fields of single-pixel imaging, three-dimensional measurement and the like.

The spatial light modulation unit includes a spatial light modulator including a modulation unit having a plurality of mirrors arranged two-dimensionally, a frame surrounding the modulation unit, and a substrate on which the modulation unit and the frame are mounted, and a cover positioned on a side of the spatial light modulator on which light enters the modulation unit. And a cover that is attached to the spatial light modulator and restricts light from entering the housing, the cover having an opening through which light enters the modulation unit.

In a spatial light modulation device 10, a detection unit 7 detects light modulated by a spatial light modulation unit 3. An estimation unit 35 estimates an incident position P2 of the light onto the spatial light modulation unit 3 on the basis of a detection result obtained by the detection unit 7. A phase pattern P1 set by a pattern setting unit 31 includes a phase pattern arranged to form a plurality of focused light spots on the detection unit 7 using the light modulated in the set phase pattern P1. The detection unit 7 detects intensity information of the focused light spots. The estimation unit 35 estimates the incident position P2 of the light onto the spatial light modulation unit 3 on the basis of a comparison result obtained from the intensity information of the plurality of focused light spots detected by the detection unit 7.

The utility model relates to the field of projection display, and discloses laser projection equipment which comprises a light source, an illumination light path, a projection lens and an absorption device. The light source is used for emitting projection beams; the illumination light path comprises a spatial light modulator and a total reflection prism; the spatial light modulator is used for modulating an incident projection light beam and then emitting an image light beam and an invalid light beam; the absorption device is located on a light emitting path of the invalid light beam and comprises an optical lens group and a light absorption box; and the optical lens group is used for shrinking and shaping the invalid light beams and then emitting the invalid light beams into the light absorption box. The invalid light beams are guided into the light absorption box through the optical lens group for high-efficiency absorption, and the invalid light beams are prevented from entering the projection lens for imaging, so that the light energy of a black field picture in a projection picture is reduced, and the contrast ratio and the color layering sense of the projection picture are improved.

Some implementations relate to a transflective spatial light modulator for enhancing the visual characteristics of a display device, making them paper-like, high resolution, and high brightness. The modulator may include a front surface configured to receive and modulate light from a primary source into visual information for display. The modulator may include a rear surface opposite the front surface and a stack of layers between the two surfaces. The stack of layers may include a polarizing layer, an anisotropic diffuser film, a liquid crystal layer, a thin film transistor element, and a layer of micro-reflective structure electrodes. The thin film transistor element may apply electricity to the liquid crystal layer to effectuate addressable spatial light modulation, solving intrinsic problems of transflective spatial light modulators. The combination of these elements results in a transflective spatial light modulator that is paper-like, high resolution, and high brightness.

A spatial light modulation (SLM) device includes one or more light inputs; one or more light outputs; a plurality of waveguides arranged in an array of receivers and / or transmitters, wherein each waveguide is coupled to one or more light inputs; and at least one light modulation element for modulating light passing through at least one of the plurality of waveguides. Wherein the waveguide and the light modulation element are integrated in at least one common module, and one of the light input or the light output is connected with a free space area occupied by a vacuum, gas, liquid and / or solid medium part.

The application provides a spatial light modulation method and system of Gray code coding rearrangement, and relates to the technical field of computational imaging and spatial light modulation. The method combines a Gray code sequence and a high-performance basic modulation matrix, a basic modulation matrix is constructed according to a target image resolution and a sampling rate, a Gray code index sequence with only one different adjacent index is generated, a measurement matrix is obtained through a mapping function rearrangement matrix, the measurement matrix is loaded to a spatial light modulator to code light signals, a double-channel detector collects transmission and reflection light intensity responses and performs differential processing, and a compressed sensing reconstruction algorithm is input to recover an image. The application realizes stable and efficient information capture at a low sampling rate, improves the anti-interference ability and repeatability of the system, has strong hardware compatibility, low implementation cost, and is suitable for the fields of single-pixel imaging, three-dimensional measurement and the like.

The present invention primarily relates to a compound of formula (I) as defined herein and to a mixture comprising or consisting of one or more compound(s) of formula (I) as defined herein and optionally one or more host material(s). Moreover, the present invention relates to the compounds of formula (II) to (VIII) as defined herein and to further specific compounds as defined herein. The present invention also relates to an electro-optic film and an electro-optic modulator-device as defined herein and to a method for manufacturing an electro-optic modulator-device comprising or consisting of the steps as defined herein. Lastly, the present invention relates to the use of a compound of formula (I) or of a mixture as defined herein or of an electro-optic film as defined herein or of an electro-optic modulator-device as defined or as manufactured herein in a field selected from the group consisting of nonlinear optics, Mach-Zehnder modulators, silicon organic hybrid electro-optic modulators, materials for devices or arrangements for the control of the intensity, color, phase, polarization or direction of light arriving from an independent light source, preferably switching, gating, or modulating, photonic communication networks, optical data transmission, preferably in 6G applications, phased array radars, satellite and fiber telecommunications, cable television (CATV), optical gyroscopes for application in aerial and missile guidance, electronic counter measure (ECM) systems, backplane interconnects for high-speed computation, ultra-quick analog-to-digital conversion, land mine detection, radio frequency photonics, programmable photonics, cryo-communications, quantum computing, spatial light modulation, and all-optical (light-switching-light) signal processing.

The invention relates to a glass edge chamfer correction processing method. The glass edge chamfer correction processing method comprises the steps of 101, pretreatment and protection, 102, measurement and laser profiling modification, 103, chemical etching and 104, laser splitting. According to the design provided by the invention, the three-dimensional shape of the modified area is actively controlled by utilizing the spatial light modulation technology, the glass side edge with the compensation inclination angle is generated, and finally, the chamfer shape meeting the design requirement is obtained through etching, so that the consistency of the product size is remarkably improved. The two key procedures of chamfering correction and splitting are organically integrated in one flow, the number of times of workpiece clamping, transferring and aligning is reduced, and the machining efficiency and the overall yield are improved.

The invention discloses a spatial light modulation method and device for quantum random number coding, equipment and a medium, relates to the technical field of spatial light modulation, and realizes seamless adaptation of quantum random coding and spatial light modulator hardware by converting a quantum random coding matrix corresponding to a target coding base into a driving signal adaptive to a spatial light modulator. It is ensured that the driving signal can accurately control the spatial light modulator to carry out random code modulation on the incident spatial light. The method comprises the steps that a quantum random number generator is adopted as an entropy source, verification screening operation is executed on an original quantum random number sequence output by the quantum random number generator, and an effective quantum random number sequence is obtained; entropy extraction operation is executed on the effective quantum random number sequence according to the set sampling number, and a target coding base is constructed; and converting the quantum random coding matrix corresponding to the target coding base into a driving signal adaptive to a spatial light modulator, so as to control the spatial light modulator to carry out random coding modulation on the incident spatial light through the driving signal to obtain modulated light.

The present flow cytometer includes a flow path in which a subject flows with a fluid, an optical illumination system including a spatial light modulation device and a first optical element, and an optical detection system including a first light detector, wherein the optical illumination system further includes a first spatial filter disposed in a first optical path between a light source and an image location of light imaged through the first optical element in the flow path and having a first region that obstructs propagation of light emitted from the light source toward the subject, the optical detection system further includes a second spatial filter disposed in a second optical path between the first light detector and the image location and having a second region that directs light modulated by the subject toward the first light detector, and a location of the first region and a location of the second region are in a substantially optically conjugate relationship.

A liquid crystal element according to an embodiment of the present disclosure comprises a first substrate having a first electrode provided to each of a plurality of pixels, a second substrate having a second electrode provided so as to face the first electrode, a liquid crystal layer provided between the first substrate and the second substrate, and an optical layer provided between the first substrate and the second substrate and having a first region and a second region. The first region has a first structure having a columnar shape. The optical layer can modulate light in a first wavelength region incident on the first region, and can modulate light in a second wavelength region incident on the second region.

The invention provides a nonlinear optical neural network system and a nonlinear optical calculation method, and the system comprises an optical feedback structure which is used for forming a circulating light path so as to enable a light beam to be circularly transmitted in the system; the input coupling assembly and the output coupling assembly are respectively used for coupling an input light beam to the circulating light path and coupling a part of light beam from the circulating light path as an output light beam; the spatial light modulation device is used for regulating and controlling at least one of the amplitude and the phase of the light beam input by the spatial light modulation device; the diffraction regulation and control assembly is used for executing multi-layer diffraction operation and regulation and control on the light beams input by the diffraction regulation and control assembly; wherein the spatial light modulation device and the diffraction regulation and control assembly are both arranged in the circulation light path, and the configuration mode of the spatial light modulation device and the diffraction regulation and control assembly enables a light beam to sequentially pass through the spatial light modulation device and the diffraction regulation and control assembly in each circulation, and the light beam reaches the output coupling assembly after passing through the diffraction regulation and control assembly.

The invention discloses a personalized aberration correction femtosecond laser refractive surgery system and method based on spatial light modulation, and relates to the technical field of ophthalmology medical equipment.The system comprises a femtosecond laser refractive surgery system body, a control module and a light modulation module; the control module is used for acquiring personalized aberration data to be corrected of the target eye and generating a laser energy spatial distribution model according to the personalized aberration data to be corrected of the target eye; and during light modulation, the light modulation module is connected with the control module and is used for carrying out spatial intensity modulation on a laser beam output by a femtosecond laser source of the femtosecond laser refractive surgery system body according to the laser energy spatial distribution model, and the modulated beam is incident to a target eye. The technical defect that the personalized high-order aberration of the patient cannot be effectively corrected by the existing femtosecond laser refractive lens extraction method can be solved.

The invention relates to an imaging control system and method, an image sensor, a processor, a computer readable storage medium and a computer program product. The imaging control system includes an image sensor and a processor. The image sensor comprises a pixel array with a plurality of pixel points and a spatial light modulation array with a plurality of light modulation units. The spatial light modulation array is located on the light sensing side of the pixel array, and the light modulation unit corresponds to at least one pixel. The processor is configured to independently adjust control parameters of the light modulation units in the spatial light modulation array, so that the adjusted light modulation units attenuate polarized light in incident light.

The non-contact distance measuring machine (1) that illuminates the measuring light from the interferometer (30) to the side from the front end of the probe (20) comprises: a cylindrical light generating unit (21) that converts the measuring light from the interferometer (30) into cylindrical light; an optical element group that makes the cylindrical light from the cylindrical light generating unit (21) light along the extension axis (E) of the probe (20); a planar light generating unit (24) that converts the light along the extension axis (E) into light radiating outward from the extension axis (E), and converts the light reflected from the surface of the object to be measured (W) and returning inward from the extension axis (E) into light along the extension axis (E); an orientation detection unit (28) that detects the orientation that becomes the maximum intensity in the light returning to the planar light generating unit (24); and a spatial light modulation unit (25) that limits the light returning to the planar light generating unit (24) to the orientation detected by the orientation detection unit (28).

An atom control architecture based on VIS-IR photonic integrated circuit (PIC) technology is characterized by (1) visible (VIS) and near-infrared (IR) wavelength operation, (2) channel counts extensible beyond 1000s of individually addressable atoms, (3) high intensity modulation extinction and (4) repeatability compatible with low gate errors, and (5) fast switching times. A 16-channel SiN-based APIC with (5.8±0.4) ns response times and <−30 dB extinction ratio at a wavelength of 780 nm. Based on a complementary metal-oxide-semiconductor (CMOS) fabrication process, this atom-control PIC (APIC) technology can be used for atomic, molecular, and optical physics and emerging applications, from quantum computers with cold atoms or ions to quantum networks with solid-state color centers. This APIC technology is especially suitable for scalable quantum information processing based on optically programmable atomic systems.

An exposure device includes: a spatial light modulation element including micromirrors; an illumination unit that irradiates the spatial light modulation element with first light with a peak wavelength λ1 and second light with a peak wavelength λ2 (λ2≈λ1), so that the first light is diffracted by ON-state micromirrors of the spatial light modulation element as first diffraction light and the second light is diffracted by the ON-state micromirror as second diffraction light; and a projection unit, wherein the first diffraction light and the second diffraction light enter the projection unit, so that the first diffraction light and the second diffraction light are distributed with an optical axis of the projection unit interposed therebetween.

An exposure apparatus includes: an exposure illumination optical system illuminating a spatial light modulator which has a plurality of spatial light modulation elements having a reflecting surface disposed on a disposition plane; a projection optical system projecting light from the spatial light modulator to an exposed substrate; a first detection unit detecting light from the reflecting surface; a second detection unit which is a detection unit detecting light from the reflecting surface and has a detection field of view larger than that of the first detection unit; and a position changing mechanism changing a positional relationship among the first detection unit, the second detection unit, and the spatial light modulator to either a first positional relationship in which the spatial light modulator faces the first detection unit and a second positional relationship in which the spatial light modulator faces the second detection unit.

The invention provides a multichannel distributed FMCW gas sensing device and method based on spatial light modulation, and relates to the technical field of spectrum diagnosis. The device comprises a tunable laser, an optical fiber coupler, a main interferometer, an auxiliary interferometer, a data acquisition card, a gas detection area and the like, wherein the gas detection area comprises a first gas pool, a second gas pool and a reflector group, and the gas detection area is arranged according to a distributed sensing mode and a multi-channel sensing mode; the main interferometer comprises a spatial light modulator, and the spatial light modulator modulates incident detection light into multiple independent light beams through phase regulation and control and emits the multiple independent light beams to a gas detection area according to a preset angle; an echo light signal returned from the gas detection area is combined with the reference light to generate a main interferometer beat frequency signal; the auxiliary interferometer beat frequency signal is used for non-linear correction of the main interferometer beat frequency signal. According to the invention, spatial multi-path distributed gas sensing can be realized.

The application relates to a light beam delay correction method and system. The method comprises the following steps: an acousto-optic modulation module receives a laser light beam to be modulated, modulates the laser light beam to be modulated, and outputs a diffraction light beam; a spatial light modulation module receives the diffraction light beam, modulates the diffraction light beam based on a delay phase, and outputs a target diffraction light beam, wherein the delay phase is determined based on the laser light beam to be modulated and parameters of the acousto-optic modulation module. The method can reduce the delay difference generated by the acousto-optic modulation module when the light beam is modulated.

The application belongs to the technical field of photobiomodulation, and particularly relates to a multi-wavelength self-adaptive transcranial photobiomodulation device based on a non-invasive brain-computer interface, which comprises: a zoom optical module, which is used for zooming collimated laser under the control of a main controller, and is used for detecting the size and energy of a light spot in real time to achieve the required size and energy of the light spot; and a spatial light modulation module, which is used for converting the zoomed light into linearly polarized light, and is used for modulating the linearly polarized light through a spatial light modulator under the control of the main controller, and irradiating the target area; wherein the main controller is used for comparing the newly-acquired electroencephalogram signal with a normal electroencephalogram signal, calculating a gray-scale image for correcting the difference value and the output power of each wavelength laser, and applying the electric signal obtained by converting the gray-scale image to the spatial light modulator to adjust the transverse gradient distribution and longitudinal focusing depth of the spatial light field of the output laser. The application can improve the accuracy and safety of transcranial photobiomodulation.

Disclosed is an electromagnetic-circuit co-design approach for massively reconfigurable, multifunctional, and high-speed programmable metasurfaces with integrated chip tiling. The ability to manipulate the incident electromagnetic fields in a dynamically programmable manner and at high speeds using integrated chip tiling approach is also disclosed. The scalable architecture uses electromagnetic-circuit co-design of metasurfaces where each individual subwavelength meta-element is uniquely addressable and programmable. The disclosed device comprises a large array of such meta-elements. The design relies on integrated high frequency switches designed in conjugation with meta-element for massive reconfigurability of incident amplitude and phase. The disclosed chip is multi-functional and can perform beamforming, high speed spatial light modulation, dynamic holographic projections, and wavefront manipulation.

The invention provides a multi-target object recognition and description method and system based on single-pixel detection, and belongs to the field of computer vision. The method comprises the following steps: acquiring and preprocessing an input image; performing simulation spatial light modulation on the preprocessed image to obtain a one-dimensional compression measurement value; processing the one-dimensional compression measurement value by using a physically-driven differential ghosting imaging module to obtain a preliminary reconstructed image; inputting the preliminary reconstructed image into the trained MSAG-UNet network, and obtaining a bridging feature and a jumping feature through down-sampling; inputting the bridging features and the jumping features into a dynamic multi-scale feature decoupling module and a purification gating fusion module to obtain a first feature map and a second feature map, and fusing the first feature map and the second feature map to obtain a segmented map; and inputting the segmented graph into a semantic description module to generate a natural language text. According to the method, the traditional bottleneck of firstly reconstructing and then analyzing is avoided, high-precision segmentation and semantic understanding are realized at an extremely low sampling rate, and the method has the advantages of high efficiency, low consumption, high robustness and the like.

To provide a spatial light modulation device capable of easily estimating an incident position of light on a spatial light modulation portion.SOLUTION: In a spatial light modulation device 10, a detection portion 7 detects light modulated in a spatial light modulation portion 3. An estimation portion 35 estimates an incident position P2 of light on the spatial light modulation portion 3 on the basis of a detection result in the detection portion 7. A phase pattern P1 set by a pattern setting portion 31 includes a phase pattern so as to form, in the detection portion 7, a plurality of light collection spots by light modulated in the phase pattern P1. The detection portion 7 detects intensity information of the light collection spots. The estimation portion 35 estimates the incident position P2 of the light on the spatial light modulation portion 3 on the basis of a comparison result of the intensity information of the plurality of light collection spots detected in the detection portion 7.SELECTED DRAWING: Figure 1

Disclosed is an illumination configuration module comprising: a polarizing and wavelength separation arrangement operable to separate input broadband illumination into at least first dispersed illumination comprising a first polarization state and second dispersed illumination comprising a second polarization state; a single spatial light modulation device operable to individually modulate each of the first dispersed illumination and second dispersed illumination to obtain first spectrally configured illumination and second spectrally configured illumination; and output optics operable to combine said first spectrally configured illumination and second spectrally configured illumination into an output illumination beam.

The present application relates to a kind of spatial light modulation units, the spatial light modulation unit includes a first electrode, a second electrode and super alignment carbon nanotube-paraffin composite structure, the first electrode is spaced apart with second electrode insulation, the super alignment carbon nanotube-paraffin composite structure is electrically connected with the first electrode and second electrode;The super alignment carbon nanotube-paraffin composite structure includes a super alignment carbon nanotube structure and a paraffin layer, the paraffin layer is covered on super alignment carbon nanotube structure and is infiltrated in super alignment carbon nanotube structure.The present application further relates to a kind of spatial light modulation device including the spatial light modulation unit.

The invention provides a laser parallel processing system and femtosecond laser processing equipment, and the system comprises a laser source which is used for outputting a laser beam; the beam splitting module is used for splitting the laser beam into multiple paths of parallel sub-beams; the spatial light modulation module is used for performing independent on-off control on each sub-beam; the multi-pass light path module is used for guiding the multiple paths of parallel sub-beams modulated by the spatial light modulation module to a plurality of processing areas respectively; and the scanning focusing modules are in one-to-one correspondence with the machining areas, and the scanning focusing modules are used for focusing the multiple paths of parallel sub-beams to the to-be-machined workpieces on the corresponding machining areas and implementing scanning. Compared with the prior art, the multi-channel parallel sub-beams can be used for machining different to-be-machined workpieces at the same time, and micro-hole machining of industrial-grade flux is achieved. And each sub-beam is independently switched on and off, so that any complex micro-pore array pattern can be quickly switched without replacing hardware, and independent and accurate regulation and control on the morphology of a single micro-pore are realized.