315 results about "Optical processing" patented technology

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.

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 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.

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 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 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.

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 present application discloses a gas refractive index measuring device based on quasi-holographic fringes, which relates to the field of optical measurement. The device comprises: a light source module for emitting a light source; an optical path module, arranged on the outgoing light path of the light source module, for uniformly processing the light source to obtain parallel light; a quasi-holographic fringe module, arranged on the outgoing light path of the optical path module, for scattering or modulating the parallel light to obtain quasi-holographic fringes; an air cavity, arranged on the outgoing light path of the quasi-holographic fringe module, for placing a gas to be measured; an optical processing module, for optically processing the quasi-holographic fringes after passing through the gas to be measured; and a calculation module, arranged on the outgoing light path of the optical processing module, for calculating the refractive index of the quasi-holographic fringes after the optical processing to obtain the refractive index of the gas to be measured. The present application can improve the globality of the measurement area, improve the anti-disturbance capability of the gas refractive index measurement, improve the measurement accuracy, and reduce the equipment cost.

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.

The invention discloses an under-sampling interference fringe wrapped phase demodulation method, and relates to the technical field of optical detection, the invention relates to an under-sampling interference fringe pattern wrapped phase demodulation method, according to an original to-be-demodulated wrapped phase, the phase gradient distribution of the original to-be-demodulated wrapped phase in x and y directions is calculated: gradx, grady; according to the method, the characteristic that phase data to be demodulated are continuous and derivable is utilized, and the method of mode Zernike polynomial fitting and residual least square fitting is combined to complete demodulation of the under-sampled fringe pattern wrapped phase data. According to the method, the problem that the dynamic range is limited in the interference measurement process can be solved without changing the hardware conditions of the interferometer, such as changing the wavelength of a light source or increasing the resolution of a detector, and particularly, the method has a good application effect on large deviation errors caused by the edge effect of the surface of an optical element in the initial stage of optical processing.

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 invention relates to the field of optical processing technology, and in particular to a magnetorheological polishing device and method based on machine vision adjustment. The device includes a robot, a control unit, an actuator group, a magnetorheological processing module, and a machine vision device. The magnetorheological processing module is arranged at the free end of the robot through the actuator group. The robot drives a polishing wheel in the magnetorheological processing module to process an optical element using magnetorheological fluid as a medium, and the machine vision device measures the ribbon thickness of the magnetorheological fluid during the processing. In the method, the real-time change of the ribbon thickness of the magnetorheological fluid during the processing is measured by the machine vision device, and the supply system, nozzle, and actuator group are then adjusted in real time to achieve real-time constant control of the removal function.

The present invention relates to the field of optical processing technology, and in particular to a magnetorheological polishing device and method for adjusting a processing speed based on machine vision. The device comprises a robot, a control unit, a magnetorheological processing module, and a machine vision device. The magnetorheological processing module is arranged at the free end of the robot. The robot drives a polishing wheel in the magnetorheological processing module to process an optical element using a magnetorheological fluid as a medium, and the machine vision device measures the ribbon thickness of the magnetorheological fluid during the processing. In the method, the real-time change of the ribbon thickness of the magnetorheological fluid during the magnetorheological processing is measured by the machine vision device, and the parameters related to the processing speed are then adjusted in real time, thereby achieving real-time constant control of the removal function.

To reduce a use amount of inert gas.SOLUTION: An optical processing method irradiates a processing target with vacuum-ultraviolet light, to optically process a surface of the processing target. The vacuum-ultraviolet light emitted from a light source mainly includes air. The vacuum-ultraviolet light is emitted so as to pass through a first medium contacting the light source and a second medium contacting the processing target and not including oxygen gas to reach the processing target. An optical processing system includes: an optical processing unit including a light source configured to emit the vacuum-ultraviolet light, a lamp house surrounding the light source, and an air supply port configured to make a space inside the lamp house to be a space filled with the first medium mainly containing the air, the optical processing unit configured to optically process a surface of the processing target conveyed along a conveyance route; and an isolation part having the second medium not including an oxygen gas so as to cover the surface of the processing target.SELECTED DRAWING: Figure 1

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 invention discloses a device for thinning the edge of an optically processed microscope lens, and relates to the technical field of thinning the edge of a microscope lens. The device aims to solve the problem of lens grinding efficiency. The device specifically comprises a chassis, wherein the outer wall of the bottom side of the chassis is fixed to a telescopic base plate by bolts, and a limit plate is provided on the outer side of each telescopic base plate. A baffle is welded to the outer wall of the side of the limit plate, and an arc-shaped frosting plate is provided on the side of the limit plate close to the baffle. The chassis is provided with a rotary push mechanism, and the end of the rotary push mechanism is provided with a rotating wheel, and the outer wall of one side of the rotating wheel is provided with suction cups distributed at equal distances. The rotary push mechanism includes a rotating assembly and a telescopic assembly, and the telescopic assembly is provided inside the rotating assembly, and the driving end of the telescopic assembly is connected to an adjustment disk by a thread. The present invention not only meets the requirements for thinning the edges of lenses of different thicknesses, but also ensures the efficiency and quality of lens edge thinning.

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 present invention relates to the field of optical processing technology, and in particular to a magnetorheological polishing device and method for adjusting a processing speed based on a sensor. The device comprises a laser tracker, a control unit, a robot, a magnetorheological processing module, and a sensor module. The magnetorheological processing module is arranged at the free end of the robot, and the robot drives the magnetorheological processing module to process an optical element. The sensor module is arranged on the magnetorheological processing module. The laser tracker cooperates with a target ball to measure the spatial coordinates of the sensor module and the working points of the polishing wheel in the magnetorheological processing module. In the method, the laser tracker and the sensor module cooperate to measure the real-time changes in the position of the robot and the magnetorheological processing module during the processing, and the speeds of the polishing wheel and the liquid pump in the magnetorheological processing module are adjusted in real time, thereby achieving real-time constant control of the removal function of the optical element.

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.