212 results about "Optical processing" patented technology

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 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.

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.

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 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 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.

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.

The application relates to the technical field of optical processing, and particularly provides a device and method for robot-driven multi-tool processing of optical elements, which comprises the following steps: connecting the back surface of a connecting plate with a robot execution end; arranging a first processing tool in the middle of the front surface of the connecting plate; arranging guide rails on the two sides of the first processing tool, wherein the sliding direction of the guide rails is perpendicular to the front surface of the connecting plate; arranging a first driver on the first guide rail and a second driver on the second guide rail; connecting a second processing tool with the first driver; connecting a third processing tool with the second driver; and arranging the axis of the second processing tool and the third processing tool to be parallel to the axis of the first processing tool; driving the second processing tool to move along the sliding direction of the guide rail by the first driver; and driving the third processing tool to move along the sliding direction of the guide rail by the second driver. The application drives three processing tools to simultaneously process by using a single robot, thereby avoiding the collision risk in the multi-robot processing process.

The embodiment of the invention provides an optical system and optical processing equipment. The optical system comprises a light source module, a polarization modulation module, a micromirror array and an objective lens assembly. The light source module is used for outputting femtosecond laser pulses. The polarization modulation module is used for receiving the femtosecond laser pulse and modulating the polarization state of the femtosecond laser pulse into a circular polarization state. And the micro-mirror array is used for receiving the femtosecond laser pulse in the circular polarization state and performing spatial modulation on the femtosecond laser pulse to generate different patterns. The objective lens assembly is used for receiving and focusing the pattern to the surface of the sample. Thus, the femtosecond laser pulse passing through the polarization modulation module has the same polarization state in all directions, so that the absorptivity and the working efficiency of different positions of the sample M are consistent in the laser processing process, and the processing quality and effect are improved. Moreover, the micro-mirror array is sensitive to the polarization state, so that energy loss and non-uniformity caused by polarization can be avoided, and the processing uniformity and the processing precision can be further improved.

This invention proposes an ion beam processing apparatus and method, specifically relating to the field of optical processing technology. The ion beam processing apparatus includes a processing platform, wherein a vacuum motion mechanism is fixed on one side of the processing platform, and a workpiece is fixed on the other side. A screen is fixed on one side of the vacuum motion mechanism, facing the workpiece. The screen is used to emit stripes. The ion beam processing apparatus provided by this invention emits stripes through the screen and monitors the first removal distribution of the processed material in real time through the stripe reflection method. The center of the ion beam can be directly determined through the stripe reflection method, and the dwell time can be determined by combining spatial coordinates. Finally, the first removal distribution and the second removal distribution are calculated to complete the ion beam processing and polishing, and the dwell time of the second round of processing is given. This can significantly improve the processing convergence efficiency and accuracy of ion beam polishing.

The present application relates to the technical field of optical processing, and particularly relates to a small grinding head processing device and a grinding head and workpiece separation method. An external power source inputs power through a pressing mechanism and processes through a driving grinding head part. When the processing is finished, a linear motion part drives a grinding head limiting plate to tightly contact the grinding head to limit the overturning of the grinding head, and air is supplied to the contact surface of the grinding head and the workpiece through an air inlet joint to accelerate the separation speed. During the air supply process, the driving pressing mechanism is controlled and the value of a force sensor is constantly monitored until the value is less than a certain threshold value, which indicates that the grinding head has been separated from the workpiece. At this time, the grinding head can be quickly lifted. The device and method provided by the present application can realize the automatic separation of the grinding head and the optical element and improve the reliability of the processing.

The present application relates to the technical field of optical processing, and particularly relates to a polishing device and method for cylindrical optical elements integrated with a multi-joint robot. The polishing method is realized based on the integration of a multi-joint robot and a cylindrical polishing tool. Firstly, according to the cylindrical surface shape characteristics of the optical element to be processed, the surface shape error distribution and the removal function are obtained. Then, the dwell time distribution is solved according to the target removal function. Finally, the multi-joint robot is used to convert the dwell time into the actual processing parameters of the cylindrical polishing tool at each processing position. The polishing device comprises a surface shape error detection module, a removal function calibration module, a dwell time solving module, a cylindrical polishing tool and a multi-joint robot. The present application converts the dwell time into the actual processing behavior of the cylindrical polishing tool through the high integration of the multi-joint robot and the cylindrical polishing tool, realizes the high-precision correction of the surface shape error of the cylindrical optical element, and effectively improves the predictability and processing consistency of the polishing process.

The invention provides an optical processing chip and an optical computing system, and relates to the technical field of photoelectronics. The optical coupling structure comprises an optical coupling structure, a micro-nano superstructure and an optical signal receiving structure. The first surface of the optical coupling structure is provided with a plurality of optical output ports used for outputting a plurality of first optical signals. The micro-nano superstructure is arranged on the first surface and comprises a plurality of superstructure units, and orthographic projections of the superstructure units on the first surface cover the light output ports in a one-to-one correspondence mode. Each super-structure unit comprises a plurality of nano-columns which are arranged at intervals and used for processing a plurality of first optical signals into second optical signals, and the first optical signals are different from the second optical signals. And the optical signal receiving structure is connected with the micro-nano metamaterial structure, and the optical signal receiving structure is configured to receive the second optical signal and obtain information carried by the second optical signal. Parallel computing is realized by using a plurality of superstructure units, so that the computing efficiency of the optical processing chip is improved, and meanwhile, the integration level of the optical processing chip is enhanced.

The present application relates to the technical field of optical processing, and specifically provides a kind of multi-tool time-sharing subarea optical lens polishing method based on rotating workpiece table, first, the surface error of lens to be processed is obtained, and it is divided into multiple sub-processing areas, according to the frequency band of surface error, select multiple suitable processing tools, and determine the removal function of each processing tool and the corresponding processing track, then the residence time of each processing tool in each sub-processing area is calculated by material convolution removal model, the processing rotation sequence of each processing tool is planned, and the residence time of several processing tools is almost equal in the same processing period is constrained;The lens to be processed is placed on the rotating workpiece table, and time-sharing subarea rotation processing is carried out by controlling the rotation of rotating workpiece table.The present application not only improves the processing efficiency, but also can realize the accurate adaptation of processing tool and frequency band error, and improve the surface processing precision.

The present invention provides defect-controlled fluoride crystals, a method for producing the same, and the use thereof. These fluoride crystals contain at least a rare earth element RE (RE is at least one element selected from the group consisting of cerium (Ce), praseodymium (Pr), lanthanum (La), and neodymium (Nd)), fluorine (F), and hydrogen (H), and have the same crystal structure as crystals represented by CeF3. A method for producing fluoride crystals according to the present invention comprises growing crystals from a raw material containing a rare earth element RE and a raw material containing fluorine (F) by a solvothermal method in the presence of at least one mineralizer selected from the group consisting of mineralizers containing an alkali metal element and / or an alkaline earth metal element, acid mineralizers, and mineralizers containing a normal salt.

The application relates to the technical field of optical processing, and provides a zinc selenide aspheric lens and a numerical control polishing process thereof, which is carried out by using a numerical control polishing machine, comprises main steps of rough polishing, fine polishing, finishing and the like, and process parameters are adjusted according to the characteristics of zinc selenide, so that the zinc selenide aspheric lens with a diameter of less than 320 mm can be polished, the global surface type PV of the zinc selenide aspheric lens is controlled to be less than 0.3 microns by means of the numerical control polishing machine, white zinc metal particles generated due to heating of the lens surface in the polishing process are avoided, the surface smoothness of the finished product reaches 60 / 40, and the laser level is reached. The application also has reference significance for polishing the surface of zinc selenide with a diameter of more than 320 mm.

The DI photoetching machine imaging lens with the optical power detection function comprises an optical processing module and an imaging lens barrel, the optical processing module comprises a shell, an inner cavity is formed in the shell, a photosensitive device is arranged on the shell, and the photosensitive device is used for monitoring the light intensity in the inner cavity. When the light generation module irradiates the light into the inner cavity, the photosensitive device can monitor the light intensity in the inner cavity in real time and feed back the light intensity, so that the system can judge whether the light intensity in the inner cavity is within the specification range in time, the stable processing quality of products is ensured, the situation that the products are unqualified on a large scale is avoided, and the loss is reduced.

The present invention relates to an optical processing device (DR) for optically processing an incident light beam (I0) that propagates in free space and is prone to phase plane distortion. This optical processing device (DR) processes at least a portion of the incident light beam (I0) into at least two fundamental light beams (R1~R N A mode conversion device (M) configured to decompose into ) and at least two fundamental light beams (R1~R N ) coherently recombines and, via the output optical port (P2), at least one recombined light beam (R c The system comprises an integrated photonic device (C) configured to generate a fundamental light beam (R1~R1). N The light propagates between the input optical port (P1) and the output optical port (P2) along at least two separate optical paths. The optical processing device (DR) is characterized in that at least one of the optical paths comprises at least one static delay element (D1, D2, D3) configured to equalize the propagation time of the fundamental light radiation along the optical path.

The utility model provides an automobile indoor reading lamp. The automobile indoor reading lamp comprises a shell, a circuit board, a plurality of light guide pieces and a plurality of lamp caps. The circuit board, the light guide part and the lamp holder are all located in the shell, the circuit board is provided with a plurality of sets of light-emitting units, and the light-emitting units are arranged at intervals in the length direction of the shell. The light guide part is provided with a first light inlet face, a first light outlet face, a first optical processing face and a second optical processing face. The first optical processing face and the second optical processing face are used for reflecting light emitted by the first light inlet face to the first light outlet face. The lamp holder is provided with a second light incident surface and a plurality of second light emergent surfaces. One light guide piece and one lamp holder are additionally arranged on each light emitting unit, the light guide pieces can guide light rays emitted by the light emitting units to the lamp holders, then the light rays are emitted out through the multiple second light-emitting faces of the lamp holders, and under the combined action of the first optical processing face, the second optical processing face and the multiple second light-emitting faces, the irradiation area of each light emitting unit can be enlarged; therefore, the lighting environment in the vehicle is improved.

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

The application relates to the technical field of optical processing, in particular to a magnetorheological polishing multi-surface common element integrated processing method, which comprises the following steps: S1, decomposing a known actual grating track into a row coordinate according to a longitudinal coordinate mutation point; S2, splitting each row track into a main mirror first track segment, a slave mirror track segment and a main mirror second track segment according to a transition point circle diameter; S3, determining a transition point extension length according to a magnetorheological equipment removal function length; S4-S5, respectively extending the main mirror track segment and the slave mirror track segment and inserting new points; S6, obtaining three-dimensional coordinates by calculating z coordinates of each segment by using a corresponding surface equation; S7, splicing to generate a single-row ordered point sequence; and S8, combining all row tracks and rotating an angle to obtain a final track. θ Through the above scheme, the problems that multi-surface common element segmented processing has long redundant time, low efficiency, and the transition area joint is not accurately processed, the transition area of the optical element has a large range of edge, the effective aperture is reduced, and the imaging quality of the optical system is affected are solved.

A line-scan three-dimensional sensing system measures the surface profile of an object. In the system, a dispersive optical module (DOM) performs forward optical processing to disperse a polychromatic linear light beam into a gradient narrow-band linear light beam (CNLLB) and focus the CNLLB on different focal planes to form a rainbow light pattern to illuminate a scanned surface of the object. The illuminated object displays an informative band color image (IBCI) containing height information of the scanned surface. The DOM captures the IBCI and performs backward optical processing to optically recombine the captured IBCI to form an elongated light pattern. The backward optical processing is the inverse of the forward processing. A slit spatially filters the elongated light pattern to form an output light ray. By analyzing the spectral content of each point on the output light ray, the height profile of the scanned surface can be obtained.

The invention discloses a tool-workpiece friction behavior evaluation method for a KDP crystal surface micro-defect repair process, relates to the technical field of optical machining, and aims to solve the problem that a tool-workpiece friction behavior evaluation method for a multi-step ball head micro-milling process for KDP crystal surface micro-defect repair is lacked in the prior art. According to the technical key points, the method comprises the following steps: step 1, determining KDP crystal surface micro-defect micro-milling repair process parameters; 2, a multi-step ball head micro-milling machining strategy is adopted for preparing a multi-layer conical corrosion inhibition microstructure, a friction behavior evaluation model in the surface micro-defect repairing process is established, the model comprises a tool-workpiece normalized ploughing friction coefficient and geometrical characteristic parameters, and the geometrical characteristic parameters comprise the tool-cutting contact length and the tool-cutting contact area; and step 3, inputting process parameters into the friction behavior evaluation model in the surface microdefect repair process to evaluate the friction behavior of the contact interface of the ball-end milling cutter and the KDP crystal material.

Disclosed in the present invention is an optical quasi-three-dimensional space converter, which is capable of converting a three-dimensional space into a large number of position-fixed two-dimensional real images having different object-image distance-related parameters. The optical quasi-three-dimensional space converter comprises a variable-focus telephoto lens, a short-focus micro-lens array and an object-image distance-related parameter adjuster; one of two lenses is used for receiving light from an object side to form an intermediate image, and the other is used for converting the intermediate image into a virtual image or a real image in a three-dimensional space; an intermediate image horizontal flipper performs left-to-right flipping on the intermediate image in a horizontal direction for real-image space conversion; and the object-image distance-related parameter adjuster is used for adjusting the focal length of the variable-focus telephoto lens, the focal length of the short-focus micro-lens array, the focal length of a camera lens, and relative positions between the lenses. The optical quasi-three-dimensional space converter in the present invention can be used for wide-field-of-view three-dimensional photographic cameras, wide-field-of-view three-dimensional projectors for naked-eye observation, three-dimensional optical processing machines, artificial eyes, etc.