46 results about "Spatial light modulation" patented technology

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.

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 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.

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).

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.

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.

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.

A single stem cell laser surgery control method combining touch control and spatial light modulation is disclosed. This method acquires the user-defined focal plane axial depth setting and real-time acquisition of the operator's continuous touch trajectory two-dimensional coordinate sequence, which is then normalized and converted into a focal motion trajectory coordinate sequence suitable for spatial light modulator modulation. A non-iterative simplified phase shift algorithm is used to map the focal motion trajectory three-dimensional coordinate sequence into a single focal point phase shift in real time. A corresponding grayscale phase map is generated based on the phase shift and loaded into the spatial light modulator. The beam modulated by the spatial light modulator is collimated, reflected, and focused onto the sample processing platform, forming a modulated spot. This modulated spot moves in three-dimensional space following the operator's continuous hand trajectory, completing the surgical operations of capturing, transferring, cutting, and arranging stem cells. This invention achieves high-precision control without contact or mechanical movement, significantly improving the safety and stability of stem cell surgery.

The invention provides an OCT speckle noise dynamic suppression system and method based on a spatial light modulator, the system comprises an OTC imaging system and a spatial light modulation unit, the OTC imaging system comprises an OCT light source, a first optical fiber coupler, a first circulator and a second circulator 4; the OCT light source is used for emitting broadband swept-frequency light, the optical fiber coupler I is used for dividing the emitted broadband swept-frequency light into a reference light beam and a sample light beam, the spatial light modulation unit comprises a triangular prism, a spatial light modulator and a 4f system, and the sample light beam is emitted from the collimator II and then is transmitted to the optical fiber coupler II; after passing through the horizontal polarizer, the sample light beam is reflected by the triangular prism to irradiate a screen of the spatial light modulator for modulation, the modulated sample light beam is subjected to zero-order unmodulated sample light beam filtering by an aperture diaphragm in the 4f system, and finally the sample light beam irradiates a sample through the galvanometer; according to the invention, a plurality of customized random speckle phases are loaded on a sample light wave front by using a spatial light modulator to obtain a sample structure diagram under different speckle phases.

The embodiment of the invention provides a DLP optical machine system and near-eye optical display equipment. Wherein the DLP ray machine system comprises a light source module, a dodging optical fiber, a shaping optical assembly, a digital micromirror device and an imaging lens; the cross section of a fiber core of the dodging optical fiber is rectangular, and the dodging optical fiber is used for receiving light beams from the light source module, homogenizing the light beams based on the rectangular fiber core cross section and outputting rectangular light spots; the shaping optical assembly is arranged on an output light path of the dodging optical fiber and is used for imaging a rectangular light spot output by the dodging optical fiber to an effective area of the digital micro-mirror device; the digital micromirror device is used for carrying out spatial light modulation on light spots imaged in an effective area of the digital micromirror device; the imaging lens is used for projecting the light beam modulated by the digital micromirror device; the output end face of the dodging optical fiber is fixed relative to the position of the digital micro-mirror device so as to ensure that the shape and the orientation of the output rectangular light spot can coincide with the effective area of the digital micro-mirror device when the output rectangular light spot is imaged to the surface of the digital micro-mirror device through the shaping optical assembly.

A color wheel control system and a color wheel control method. The color wheel control system includes a first image control circuit, a first motor unit and a micro control circuit. The first image control circuit generates a control signal. The first image control circuit is used to drive a spatial light modulation unit. The first motor unit is coupled to the first image control circuit. The first motor unit is used to drive a first color wheel to rotate and generate a first position indication signal related to the first color wheel. The micro control circuit is coupled to the first motor unit and the first image control circuit. The micro control circuit controls the first motor unit to maintain a rotation speed of the first color wheel at a first target rotation speed according to the first position indication signal. The micro control circuit adjusts the first target rotation speed according to the control signal. The color wheel control system and method of the present invention can control the color wheel to quickly reach the target rotation speed.

The invention provides a projection imaging lens structure which at least comprises a light source or an image source, an optical projection lens composed of more than two optical lenses and a reflector, and the optical lenses are arranged on the two sides of the reflector. The light source or the image source is arranged to be a light source or an image source with a spatial light modulation unit; the optical projection lens is arranged to be an optical projection lens composed of more than two optical lenses with focal power; the reflector has a shape matched with the mounting position or functional requirement of the reflector; the reflector is made of a transparent material; a reflecting layer is at least partially arranged on the outer surface of the reflector to form an optical function surface for changing the propagation direction of incident light; while automobile modeling aesthetics is strictly satisfied, excellent optical performance and driving safety are realized.

A pattern-exposure-apparatus includes: spatial-light-modulating-element including a plurality of micro-mirrors selectively driven based on drawing data, illumination-unit that irradiates spatial-light-modulating-element with illumination-light at predetermined-incidence-angle, and projection-unit that projects reflected-light from selected micro-mirrors of spatial-light-modulating-element in ON-state to substrate, and pattern-exposure-apparatus projects and exposes pattern corresponding to drawing data to substrate, illumination-unit including condensing-optical-member that condenses light from surface-light-source having predetermined shape so as to obliquely irradiate light to spatial-light-modulating-element and that is disposed along optical-axis which is inclined at incidence-angle with respect to optical-axis of projection-unit so as to optically conjugate surface-light-source with pupil of projection-unit, and correcting-optical-member that deforms shape of outline of the surface-light-source so as to correct distortion of outline of image of the surface-light-source, which is formed on pupil of the projection-unit by reflected-light from micro-mirrors of the spatial-light-modulating-element in ON-state, into elliptical-shape according to incidence-angle.

The application provides a high-resolution X-ray scattering spatial correlation imaging system, characterized by comprising an X-ray spatial light modulation device and a high-resolution area array detector which are arranged in sequence along the incident direction of X-rays and form a first light path, and the X-ray spatial light modulation device, a sample to be measured and a large-area area array detector which are arranged in sequence along the incident direction of X-rays and form a second light path, and the high-resolution area array detector and the large-area area array detector are electrically connected with a processor. The high-resolution X-ray scattering spatial correlation imaging method and system of the application are based on the combination of the spatial light fluctuation modulation technology, the spatial correlation imaging method and the X-ray scattering method to obtain scattering information with high spatial resolution and imaging. The application discards the high-resolution technical scheme of spot micro-focusing and two-dimensional scanning in view of the problem of low spatial resolution in traditional SAXS / WAXS measurement imaging.

A pattern-exposure-apparatus includes: spatial-light-modulating-element including a plurality of micro-mirrors selectively driven based on drawing data, illumination-unit that irradiates spatial-light-modulating-element with illumination-light at predetermined-incidence-angle, and projection-unit that projects reflected-light from selected micro-mirrors of spatial-light-modulating-element in ON-state to substrate, and pattern-exposure-apparatus projects and exposes pattern corresponding to drawing data to substrate, illumination-unit including condensing-optical-member that condenses light from surface-light-source having predetermined shape so as to obliquely irradiate light to spatial-light-modulating-element and that is disposed along optical-axis which is inclined at incidence-angle with respect to optical-axis of projection-unit so as to optically conjugate surface-light-source with pupil of projection-unit, and correcting-optical-member that deforms shape of outline of the surface-light-source so as to correct distortion of outline of image of the surface-light-source, which is formed on pupil of the projection-unit by reflected-light from micro-mirrors of the spatial-light-modulating-element in ON-state, into elliptical-shape according to incidence-angle.

The invention provides an optical image processing system that performs convolutional operations using spatially modulated light and a photosensitive film embedded with a convolutional kernel. A spatial light modulator (101), such as a digital micromirror device or LCD panel, emits light corresponding to an input image. This light passes through a photosensitive film (102) embedded with the kernel via a process of photographic exposure, chemical development, and fixing. The modulated light is projected onto an output plane (103), forming the final image, which is the convolution of the input image and the kernel. This image can be captured by a camera for further analysis. The system allows real-time, high-speed image processing by utilizing the properties of light, reducing digital computational requirements, and enabling flexibility through replaceable films for various tasks.

A therapeutic laser for use in treating ophthalmological conditions can be modulated by a spatial light modulation device in order to focus the therapeutic laser on a plurality of target locations simultaneously.

The application discloses a method for programmable fast assembly of SERS substrates driven by photo-induced dielectrophoresis, and relates to the technical fields of micro-nano manufacturing and surface enhanced Raman spectrum detection, and the method comprises the following steps: constructing a photo-induced electrophoresis chip; obtaining micro-nano particles and target objects to be detected; mixing the micro-nano particles and the target objects to be detected to obtain a suspension, and injecting the suspension into a liquid cavity of the photo-induced electrophoresis chip to obtain an assembled photo-induced electrophoresis chip; based on the assembled photo-induced electrophoresis chip, driving the micro-nano particles in the suspension to capture the target objects to be detected according to photo-induced convection and dielectrophoresis force through a programmable spatial light modulation device, obtaining a chimeric substrate, and performing in-situ surface enhanced Raman spectrum detection and quantitative analysis. The application solves the problems of low efficiency, poor structure controllability, insufficient uniformity and liquid phase incompatibility of traditional micro-nano assembly technology, and realizes efficient aggregation, reconfigurable assembly and in-situ SERS detection of the micro-nano particles and the target objects to be detected in a liquid environment.