441 results about "Optical processing" patented technology

The invention relates to the technical field of optical processing, and provides a large-caliber monocrystalline silicon aspheric surface high-precision polishing method which is characterized by comprising the following steps: S10, obtaining full-caliber surface shape error distribution of a large-caliber monocrystalline silicon aspheric surface and mapping the full-caliber surface shape error distribution to a discrete grid; s20, constructing a residence time distribution optimization model and a polishing path planning optimization model, and outputting an optimal residence time distribution matrix and a polishing path sequence by taking the surface shape error parameters of the large-aperture monocrystalline silicon aspheric surface as input; s30, based on the optimal residence time distribution matrix and the polishing path sequence, the aspheric surface of the large-diameter monocrystalline silicon is polished; and S40, after each polishing cycle, the steps S10-S40 are repeated until the number of iterations is reached. According to the method, a closed-loop control method of time distribution-path planning-dynamic calibration is formed, so that the surface shape precision and efficiency of large-diameter aspheric surface polishing are remarkably improved.

The invention relates to the technical field of optical processing, in particular to a method for deciding polishing process parameters based on image quality indexes of a neural network. Comprising the steps of determining structure parameters of an optical system according to specific requirements; marking an optical element which needs to be subjected to process decision in the optical system, and recording historical processing data; an optical system is built, the marked optical element is placed in the optical system, actual image quality indexes are obtained through debugging, and the deterioration degree compared with ideal system image quality is collected; repeating the steps to obtain a data set; taking the image quality deterioration degree data set as input, taking the process parameters of the elements as output, and inputting the image quality deterioration degree data set and the process parameters into a modular convolutional neural network for training to obtain a prediction network model; and when an optical system element manufacturing task arrives, inputting the system type and the image quality deterioration degree allowance into the prediction network model to obtain polishing process parameters meeting the image quality deterioration degree allowance. The method has the advantages of quick decision, less calculation time and high understandability.

The subject matter described herein relates to various antenna element configurations, antenna array configurations, their operations including various systems and methods to generate modulated data for transmission by an RF antenna array via an optical processing engine. The subject matter includes optical processing engine structure and methods (e.g., modulating in the optical domain, MIMO and spatial modulation via RF beam formation, coherent transmission of RF signal components, coherent operation of spatially separate RF antenna arrays) that may be implemented with the various RF antenna array structures. In some examples, the system combines the virtues of digital, analog and optical processing to arrive at a solution for scalable, non-blocking, simultaneous transmission to multiple UE-s. Much of the system architecture is independent of the RF carrier frequency, and different frequency bands can be accessed easily and rapidly by tuning the optical source (TOPS). In some examples, multiple communication channels may be transmitted simultaneously to different locations. The transmitter may be formed by an array of optically fed antennas.

The invention relates to the technical field of optical processing, and discloses an imaging depth adjustable laser optical processing system, which comprises a laser emission unit, an optical conduction unit, a spectral domain optical coherence tomography imaging unit, a laser galvanometer scanning unit, an indication light imaging unit, an image processing display unit and a control unit, according to the spectral domain optical coherence tomography imaging system, time scanning of high output wavelength is realized by utilizing a wavelength scanning mode that the scanning telescopic rotating module drives the spectral domain optical coherence tomography imaging system, and position information or image information of a sample from the surface to the interior is provided in real time in combination with an image processing technology; the three-dimensional galvanometer scanning unit scans the position of a sample in real time and records the position and orientation information of a scanning point at the same time, real-time image information and different depths, widths and axial positions of the sample are scanned at the same time, the focusing depth and wavelength of an imaging laser beam and the focusing position and energy of the scanning laser beam are fed back and adjusted, and the laser beam is positioned to the sample for machining.

Optical patient monitoring systems are disclosed. The system may comprise an optical coupling system configured to transmit to and receive light signals from one or more locations on a subject; an optical processing system configured to generate optical data using the received light signals; and a computer programmed to receive the optical data; determine, using the optical data, at least one indicator of blood pressure; estimate an estimated blood pressure using the at least one indicator of blood pressure; and generate a report indicative of the estimated blood pressure. The at least one indicator of blood pressure comprises one or more of near-infrared spectroscopy (NIRS) data; photoplethysmography (PPG) data, diffuse correlation spectroscopy (DCS) data, speckle contrast optical spectroscopy (SCOS) data, speckleplethysmography (SPG) data, first derivative PPG data, second derivative PPG data, first derivative SPG data, second derivative SPG data, inflow (Fin) data, outflow (Fout) data, heart rate data, physiological data, and combinations thereof. Methods for estimating blood pressure are also disclosed.

The invention belongs to the field of advanced scientific devices integrating optics, quantum mechanics, atomic physics and a vacuum technology, and particularly relates to a glass vacuum cavity and a manufacturing method thereof.The manufacturing method includes the steps that the inner surfaces of window pieces are machined firstly, an inner working face with high surface shape precision can be obtained, and after the inner surfaces are machined, the four window pieces are plated with films, and the working faces are plated with antireflection films; the optical cement surface is plated with an optical cement auxiliary film, and the diffraction film is rubbed after the optical cement surface is plated with the film, so that the optical cement strength is ensured to be optimal. After every two of the four window sheets are subjected to optical cement deepening, the outer surfaces are processed, and when the outer surfaces are processed, the inner surfaces are protected, so that the quality of a film layer is not damaged. By means of the method that optical processing, film coating and optical cement deepening are conducted on the inner surface alternately, and then optical processing, film coating and optical cement deepening are conducted on the outer surface alternately, the glass vacuum cavity which is high in window piece surface shape precision, high in window piece parallel precision, high in combination strength and good in air tightness, and the film layer surface quality is not prone to pollution or damage can be machined.

The invention discloses an optical quasi-three-dimensional space converter which can convert a three-dimensional space into a large number of fixed-position two-dimensional real images with different object image distance related parameters. The optical quasi-three-dimensional space converter comprises a zoom long-focus lens, a short-focus micro lens array and an object image distance related parameter regulator; one of the two lenses is used for receiving light from an object space and imaging the light into an intermediate image; one is used for converting the intermediate image into a virtual image or a real image of a three-dimensional space; the intermediate image horizontal turner turns the intermediate image left and right in the horizontal direction for real image space conversion; and the object image distance related parameter regulator is used for regulating the focal lengths of the zoom long-focus lens, the short-focus micro lens array and the pick-up lens and the relative positions of the lenses. The optical quasi-three-dimensional space converter can be used for a wide-field-of-view three-dimensional camera, a wide-field-of-view three-dimensional projector for naked eye observation, a three-dimensional optical processing machine, artificial eyes and the like.

An optical module (200), comprising an optical processing component (500). The optical processing component (500) comprises: a first beam processing assembly (510); a second beam processing assembly (520), the second beam processing assembly (520) being arranged above the first beam processing assembly (510); a lens assembly (530) arranged at the light exit side of the first beam processing assembly (510) and the second beam processing assembly (520); and a deflecting prism (540) arranged at the light exit side of the lens assembly (530), wherein the deflecting prism (540) is provided with reflective surfaces (5411, 5421, 5431, 5441, 5451) at the reflection side thereof, the reflective surfaces (5411, 5421, 5431, 5441, 5451) are located on an output optical path of at least one of the first beam processing assembly (510) and the second beam processing assembly (520), and the reflective surfaces (5411, 5421, 5431, 5441, 5451) are configured to reflect light signals output by the first beam processing assembly (510) and / or the second beam processing assembly (520).

The invention relates to the technical field of optical processing, in particular to a method for calculating the processing residence time of a large-aperture optical element through a convolution gradient method, and the method comprises the steps: obtaining the surface shape residual error and a removal function of a to-be-processed workpiece according to the surface shape and the processing technology of the to-be-processed workpiece; a polishing track and polishing track parameters are set according to the surface shape sampling size of the workpiece to be machined; according to the surface shape residual error, the removal function and the polishing track, an objective function is determined, and iteration conditions are set based on the gradient of the objective function; and optimizing the target function by utilizing an iteration condition, and calculating to obtain the final residence time. According to the method, the original residual iteration condition is set as the gradient iteration condition, so that the calculation precision of the residence time is ensured, the calculation and optimization process of the residence time is accelerated, and the engineering period is shortened.

An optical processing apparatus includes: a combining element that combines a first optical path of a first light beam having a first wavelength and a second optical path of a second light beam having a second wavelength longer than the first wavelength; a condensing optical system having a positive refractive power and that condenses each of the first and second light beams from the combining element on a processing target object; and a correction optical system having a negative refractive power, the correction optical system is disposed on the first optical path at an entrance side of the combining element, one light beam of the first light beam and the second light beam is a light beam for processing the processing target object, the other light beam of the first light beam and the second light beam is a light beam for measuring the processing target object.

The invention relates to a mask defect detection system based on polarization transmission and reflection combination. The system comprises a laser; the first polarization beam splitter is used for carrying out polarization beam splitting on the laser beam to generate P polarized light and S polarized light; the transmission light path is used for performing optical processing and polarization state adjustment on the P polarized light and then projecting the P polarized light to a mask plate; the reflection light path is used for performing optical processing and polarization state adjustment on the S polarized light and then projecting the S polarized light to a mask plate; the imaging light path is used for imaging when the P polarized light is transmitted from the mask plate to obtain a transmission image, and imaging when the S polarized light is reflected from the mask plate to obtain a reflection image; and the storage and operation module is connected with the imaging light path and is used for storing and operating the transmission image and the reflection image so as to analyze whether the mask has defects or not. According to the invention, transmission and reflection dual-polarization light path imaging is adopted, and various mask plate defects can be simultaneously and effectively detected.

A computing system may be provided. The computing system may include an optical memory cavity configured to store signal pulses representing a current combination for a combinatorial optimization computation. The computing system may further include an optical processing cavity. The optical processing cavity may be configured to receive the signal pulses from the optical memory cavity, perform an all-optical 1-bit delay computation on the signal pulses to generate a feedback pulse for at least one signal pulse, and provide the feedback pulse to be coupled back to the optical memory cavity.

The invention relates to the technical field of optical machining, in particular to a magneto-rheological polishing polyhedral common body element integrated machining method which comprises the steps that S1, a known actual grating type track is decomposed into row coordinates according to longitudinal coordinate abrupt change points; s2, splitting each line of track into a first track segment of the main body mirror, a second track segment of the auxiliary body mirror and a second track segment of the main body mirror according to the diameter of a transition point circle; s3, determining the extension length of a transition point according to the length of the removal function of the magnetorheological equipment; s4 to S5 respectively extending the main body mirror, and inserting new points from the body mirror track segments; s6, calculating the z coordinate of each fragment by using a corresponding surface equation to obtain a three-dimensional coordinate; s7, splicing to generate a single-row ordered point sequence; and S8, combining all line tracks and rotating by an angle of-theta to obtain a final track. By means of the scheme, the problems that the multi-face common-body element is long in redundant time and low in efficiency in segmented machining, the edge reserving range of the transition area of the optical element is too large, the effective aperture is reduced, and the imaging quality of an optical system is affected due to the fact that joints of the transition area are not precisely machined are solved.

A backlight module, including a back plate, and a colored light source plate, a first color conversion layer and a plurality of first optical processing layers, which are on the back plate and sequentially arranged away from the back plate; where the backlight module further comprises a second color conversion layer on at least a side, away from the back plate, of one of the plurality of first optical processing layers farthest from the back plate; an orthographic projection of the second color conversion layer on the first optical processing layer is in a peripheral edge region of the first optical processing layer; and the second color conversion layer is configured to convert monochromatic light emitted by the colored light source plate and incident into the second color conversion layer, into white light.

The invention relates to an SAR photoelectric processor phase error compensation method based on a Zernike polynomial, and the method comprises the steps: obtaining an SAR photoelectric processor to be subjected to phase error compensation, and employing the Zernike polynomial to express the modulation phase of a spatial light modulator in the SAR photoelectric processor; respectively calculating two-dimensional frequency domain phases of an ideal SAR echo signal and a non-ideal SAR echo signal of the SAR photoelectric processor, determining a focusing phase error, fitting the focusing phase error by adopting a Zernike polynomial, and evaluating focusing phase error (parameter) estimation performance; a plurality of Zernike coefficients are randomly generated for a Zernike polynomial, optimization of the Zernike coefficients is carried out by adopting a genetic algorithm, and the quality of the SAR image is used as a fitness value of the genetic algorithm until the Zernike coefficients meeting optimization conditions of the genetic algorithm are obtained and used for prediction of a modulation phase. Compared with the prior art, the two-dimensional frequency domain phase error can be effectively corrected, and a theoretical foundation is laid for an automatic focusing algorithm special for SAR optical processing.

An optical processing system comprises an Optical Fourier transform stage; and one or more photodetectors for receiving a reference optical signal to provide currents and / or voltages relating to the intensities and / or phases of the reference optical signal; the system further comprising an electronics feedback loop which feeds back the currents and / or voltages and modulates the intensities and / or phases of a subsequent optical signal.

The invention relates to the technical field of optical machining, in particular to a polishing surface roughness prediction method based on a robot flexible ball head tool, which comprises the following steps: firstly, establishing a microscopic contact model of the flexible ball head tool and a workpiece, and determining first pressure distribution of a contact area between the flexible ball head tool and the workpiece; vibration of the flexible ball head tool is converted into pressure fluctuation of the flexible ball head tool, total pressure distribution during machining is obtained, and then second pressure distribution is formed; in combination with the second pressure distribution and the relative speed model during machining of the flexible ball head tool, a material removal rate model during machining of the flexible ball head tool is obtained; performing path integration on the material removal rate model to obtain the surface height change of the workpiece in the machining process; and the surface roughness of the machined workpiece is obtained by combining the original surface height and the surface height change of the workpiece. According to the method, the quantitative relation between the vibration parameters and the surface roughness is disclosed, and a theoretical basis is provided for optimizing polishing process parameters and controlling the surface quality.

The invention relates to the technical field of optical machining, and provides an ultra-precision polishing method for a calcium fluoride optical element, which comprises the following steps: S10, initializing polishing process parameters of the calcium fluoride optical element; s20, polishing equipment is started to polish the calcium fluoride optical element, the multi-dimensional sensor network is activated synchronously, and multi-dimensional sensing data of a polishing area are collected in real time; s30, a sliding window median and a median absolute deviation standardization value are calculated by adopting the sliding window, and abnormal points of the multi-dimensional sensing data are checked; s40, in the polishing process, polishing process parameters are dynamically corrected based on abnormal point distribution of the multi-dimensional sensing data; and S50, after the surface roughness reaches the target value and the surface shape precision reaches the standard, polishing is stopped, and the polished target calcium fluoride is obtained. Through multi-sensor fusion and intelligent feedback control, the core problems that in traditional calcium fluoride polishing, real-time performance is poor, multi-physical-quantity coupling is difficult to control, and abnormal response lags behind are solved.

The invention provides a terahertz frequency comb generation verification method and system based on an optical fiber microcavity optical frequency comb, and the method comprises the steps: injecting a continuous wave laser into an optical fiber microcavity resonator to generate a stable Kerr optical frequency comb, enabling the Kerr optical frequency comb to work in a single soliton state or a soliton crystal state, and obtaining an optical frequency reference with low phase noise. Furthermore, spectrum selection is performed on the optical frequency comb, multiple groups of optical comb tooth pairs comprising comb teeth of different orders are actively selected, and the optical frequency difference of each group of comb tooth pairs is directly converted into an electric signal in a terahertz frequency band by utilizing a beat frequency effect of a photoelectric detector. A plurality of terahertz electric signals generated by different comb tooth pairs are integrated to form a multi-channel terahertz frequency comb. The method allows a plurality of discrete and frequency-controllable terahertz signal channels to be generated in parallel on a single optical platform through one-time optical processing and photoelectric conversion, so that multichannel terahertz frequency comb generation is realized.

The invention relates to the technical field of optical machining, in particular to a method for automatically generating a complex curved surface machining numerical control program. Comprising the following steps: collecting related information of the complex curved surface, including information of the complex curved surface, process parameters when the complex curved surface is processed and program information of a numerical control machine tool when the complex curved surface is processed; collecting a plurality of groups of data in the above steps to obtain a complex curved surface information data set, taking the process information data set as an input data set, and obtaining a numerical control program data set as an output data set; constructing a transfer learning network; the input data set is input and trained, and a complex curved surface machining code prediction model is obtained; and according to the requirement of a complex curved surface machining task, information of the complex curved surface and technological parameters when the complex curved surface is machined are obtained and input into the complex curved surface machining code prediction model, a machine tool numerical control code can be obtained, and efficient machining of the complex curved surface is achieved. The method has the advantages of being short in calculation time, improving polishing precision and efficiency and enhancing model adaptability.

The invention relates to the field of optical lens manufacturing, in particular to an optical lens loading and fixing device. According to the optical lens loading and fixing device, low-stress and high-precision fixing, rapid assembly and disassembly, zero pollution and low damage are achieved in a vacuum adsorption and sealing lacquer gluing composite mode in cooperation with the hollow column array of the heat-resistant elastic layer and the positioning structure of the inverted trapezoidal strip-shaped protrusions and the grooves, the device can be self-adaptive to adsorption and release of lenses with different curvatures, and the stability of the lens loading and fixing device is improved. The structure is compact, the reliability is high, the core pain points of stress deformation, low efficiency, easy pollution and the like in the prior art are effectively solved, and an efficient and reliable solution is provided for high-precision optical processing.

The present application relates to the technical field of robot control, and especially relates to a multi-robot optical processing safety control system and method based on machine vision. The method covers the global vision of multi-robot collaborative processing through multiple vision sensors, and tracks multiple feature targets in the workspace in parallel. The high-reflective marker points on the robots in the image are located at the sub-pixel level. After the pixel boundary box is used to determine and issue a primary early warning event or a collision warning event, the pose solution frequency of the involved robot is dynamically adjusted, and the three-dimensional space pose data of the robot is solved. Whether to execute motion intervention or emergency stop is determined according to the three-dimensional space shortest Euclidean distance and the predicted collision time between the involved robots. The present application uses a low-complexity two-dimensional multi-target tracking method for global continuous monitoring, and performs high-precision pose solution and collision detection in stages, so as to realize dynamic optimization allocation of computing resources, avoid monitoring false negatives, and effectively reduce system running load.

Aspects of the subject disclosure may include, for example, a housing that includes a first waveguide port and a second waveguide port, wherein the first waveguide port is configured for receiving an optical signal via a first optical waveguide optically coupled to the first waveguide port. The housing may include a passive optical processing module that is removably coupled to the housing and optically coupled to the first waveguide port. The passive optical processing module is configured to perform a prescribed function, e.g., filtering, upon the optical signal to obtain a processed optical signal without utilizing an electronic circuit. The second waveguide port is configured to transfer the processed optical signal to an optical waveguide external to the housing. Other embodiments are disclosed.

The present invention relates to the field of optical processing technology, and particularly to a method for calculating the machining pose of a magnetorheological polishing multi-faceted coaxial element. According to the surfaces of each mirror body in the multi-faceted coaxial element to be machined, the corresponding trajectory segments of each mirror body during machining are determined; by combining the corresponding trajectory segments of each mirror body, the ideal polishing trajectory during machining is obtained; the polishing gap of the machining tool during machining is set, and the normal vectors of each point of the mirror body in the multi-faceted coaxial element are determined; according to the polishing gap and the normal vectors of each point, the actual polishing trajectory of the machining tool and the machining pose of the machining tool are obtained, and the machining pose of the machining tool is derived. The present invention realizes the machining pose control of coaxial multi-faceted coaxial elements, and reduces the redundant manufacturing time of multi-stage machining.

The utility model discloses a lens polishing clamp, and relates to the field of optical machining. Through the unique design of the outer clamping jaw and the inner clamping jaw, the circular clamping groove and the rectangular clamping groove are adopted, cylindrical and rectangular cylindrical lenses can be stably clamped, the limitation that a traditional clamp is only suitable for clamping cylindrical lenses is overcome, the application range of the clamp is widened, the polishing requirements of lenses of different shapes in optical machining are met, and the polishing efficiency is improved. Through the ingenious design of a connecting mechanism, the inner clamping jaw can be easily disassembled by pressing a pressing rod, only a butt joint rod needs to be inserted during installation, positioning and locking are automatically completed through a limiting block and a spring, operation is easy and convenient, the replacement time of the clamp is greatly shortened, and the production efficiency is improved; and the labor intensity of operators is reduced.

The application relates to a fiber panel for cultural and creative products and a preparation method and application thereof. The fiber panel comprises a plurality of optical fibers arranged in an array, the optical fiber comprises a core and a cladding layer; the core has a refractive index of 1.66-1.68; the cladding layer is coated outside the core; the cladding layer has a refractive index of 1.50-1.52, and the expansion coefficient of the cladding layer is 2-5*10 ‑7 (1 / DEG C) lower than that of the core; the method comprises the following steps: taking a glass rod with a refractive index of 1.66-1.68 as core material, nesting a glass tube with an expansion coefficient of 2-5*10 ‑7 (1 / DEG C) lower than that of the core material and matching the diameter of the core material rod as sheath material, hot melting to obtain a preform rod; performing fiber drawing and arrangement on the preform rod to obtain a multifilament rod; and performing bundling, plate drawing, mechanical processing and optical processing on the multifilament rod to obtain the fiber panel. The technical problem to be solved is to make the fiber panel free of dark spot defects with a diameter of 150 microns or above, free of chicken wire defects with a length of more than 2 mm, shear distortion less than or equal to 100 microns, snake distortion less than or equal to 100 microns, and image displacement less than or equal to 280 microns.

The invention regards a digital optical computing processing unit configured to perform analogue-digital convolutions by processing at least a first and a second electrical digital signal, a digital optical computing processing unit configured to perform analogue-digital continuous convolutions by processing at least a first, a second and a third electrical digital signal and a digital optical computing processing unit configured to perform digital-digital multiplications by processing at least a first, a second and a third electrical digital signal. Methods for hybrid optical-electrical convolution between matrixes and a method for a hybrid optical-electrical multiplication of a first digital signal with a second digital signal are also disclosed.

Provided is an information display apparatus that significantly improves light resistance with respect to sunlight. The information display apparatus, which displays video-image information on a projection surface by a virtual image, includes in a housing partly having an opening: a video-image-light generator that generates video-image light for displaying the video-image information; a video-image-light processor that performs a predetermined optical processing to a video image generated by the video-image-light generator; and a projector that projects, onto the projection surface through the opening of the housing, the video-image light optically processed by the video-image-light processor so that a viewer is capable of virtually recognizing the video-image information as a virtual image in front of the projection surface, wherein a light path in the housing is provided with a suppressor selectively suppressing a P-polarizing component of light in a visible light region.

The application relates to the technical field of optical processing, and discloses a laser optical processing system with adjustable imaging depth, which comprises a laser emission unit, an optical transmission unit, a spectral domain optical coherence tomography unit, a laser galvanometer scanning unit, an indicating light imaging unit, an image processing and display unit and a control unit. The wavelength scanning mode of the spectral domain optical coherence tomography system is driven by a scanning telescopic rotating module, time scanning of high output wavelength is realized, image processing technology is combined to provide position information or image information of a sample from a surface to an interior in real time, the position of the sample is scanned in real time by a three-dimensional galvanometer scanning unit, the position and directional information of a scanning point are recorded, the real-time image information of the sample is simultaneously scanned, different depths, widths and axial positions are realized, the focusing depth and wavelength of an imaging laser beam, the focusing position and energy of a scanning laser beam are adjusted and fed back, and the sample is positioned for processing.

Provided is an image display device with which it is possible to improve image reproducibility and / or improve image visibility by a simple configuration.　An image display device according to the present technology comprises: a light source system that includes at least one laser light source and emits laser light modulated according to image information; a branch optical path selection system that includes an optical path branching unit that branches an optical path of the laser light from the light source system into a plurality of branch optical paths; and an optical path synthesis system that synthesizes the plurality of branch optical paths. The branch optical path selection system further includes a first optical processing system that selects, as the branch optical path through which the laser light travels from the optical path branching unit, at least one branch optical path among the plurality of branch optical paths, and performs optical processing on the laser light traveling through some branch optical paths among the plurality of branch optical paths.