56results about "High-speed photography" patented technology

A processor-implemented method with image acquisition includes acquiring image frames comprising a shutter-off frame corresponding to a shutter-off through a sensor by performing the shutter-off during continuous shooting, acquiring a measurement signal corresponding to a target image frame, removing, based on a target shutter-off frame corresponding to the target image frame, a first remaining signal corresponding to the target shutter-off frame from a measurement signal corresponding to shutter-off period frames comprising image frames between the target image frame and the target shutter-off frame, and generating a target image frame from which a second remaining signal is removed based on one or more of the shutter-off period frames from which the first remaining signal is removed.

The invention provides a device for generating multiple beams of time sequence light based on a single-circle light spring, and relates to the technical field of ultrafast imaging, and the device comprises a leading edge tilt pulse generation system which is used for generating a long elliptical leading edge tilt pulse; the light spring generation system comprises a polarizer, a first wave plate, a diaphragm, a geometric conversion device, a convex lens, a phase compensator and a second wave plate which are sequentially arranged along the pulse propagation direction, and generates a single circle of light spring pulse based on the long elliptical leading edge tilt pulse output by the leading edge tilt pulse generation system; and the time sequence light beam generation system is used for dividing the single-circle light spring pulse into a plurality of beams of time sequence light through a circular porous diaphragm and a lens group. According to the invention, multiple beams of time sequence pulses can be generated as a coherent shutter to interfere with a signal light beam carrying ultrafast event information, multiple beams of time sequence light can be efficiently generated, multi-beam interference noise is optimized, and efficient image separation of ultrafast imaging is realized.

The present invention provides a method for leakage testing of an electrostatic chuck. The method for leakage testing of an electrostatic chuck comprises: a mounting step of mounting the electrostatic chuck on a test stage of a testing chamber; a loading step of loading a dummy substrate in an upper surface of the electrostatic chuck; a decompression step of decompressing an interior of the testing chamber; a tracking fluid supply step of supplying a tracking fluid with visibility to a flow path of the electrostatic chuck; a photographing step of photographing the electrostatic chuck; and a determination step of determining whether a leakage occurs in the flow path by examining an image photographed in the photographing step.

The invention provides an electrostatic discharge ultra-high-speed image recording device. Relates to the image acquisition field. Comprising a spectroscope used for dividing a light beam generated by electrostatic discharge into a first discharge split light beam and a second discharge split light beam; the synchronous triggering unit is used for generating a first starting signal, a second starting signal and a third starting signal; the first starting signal, the second starting signal and the third starting signal simultaneously reach the high-speed camera, the first rotary reflecting mirror and the linear array camera; the high-speed camera is used for collecting the first discharge split beam to obtain a first played image under the condition that the first starting signal is received; the first rotary reflecting mirror is used for reflecting the second discharge split light beam; under the condition that a second starting signal is received, the rotating device rotates at a set speed; and the line-scan digital camera is used for collecting the reflected second discharge split beam under the condition that the third starting signal is received to obtain a second played image.

The present invention discloses a transmission-type three-channel compressed ultrafast imaging device to solve the problem that the existing compressed ultrafast imaging system cannot flexibly change the dual-coding sampling rate, resulting in low quality of reconstructed images and failure to meet the needs. Specifically, it includes a 4f system, a first light conversion component, a second light conversion component, a first coding plate, a second coding plate, a streak camera CCD camera and a processing unit; the 4f system is located on the target light; the first light conversion component converts the target light into a first light beam and a second light beam; the second light conversion component is arranged on the optical path of the second light beam; the streak camera is arranged on the optical paths of the first light beam and the third light beam; the first coding plate is arranged between the first light conversion component and the streak camera, and is located on the optical path of the first light beam; the second coding plate is arranged between the second light conversion component and the streak camera, and is located on the optical path of the third light beam; the first coding plate is not related to the second coding plate; the processing unit is connected to the output ends of the streak camera and the CCD camera respectively.

A single-pixel imaging method for an object retracing a motion trajectory, a system, a medium, and a device. The method comprises: a controller generating, according to a predefined formed-image reconstruction algorithm, a modulation pattern sequence having different spatial distributions, and inputting the modulation pattern sequence into a light modulation apparatus (S1); the light modulation apparatus receiving a trajectory pulse signal from a digital signal processor, and simultaneously sending a modulated pulse signal to a synchronous multi-channel signal acquisition apparatus (S2); the synchronous multi-channel signal acquisition apparatus receiving the modulated pulse signal, and being triggered to acquire, at a predetermined sampling frequency, a plurality of sample values of a sampled light signal illuminating an object to be imaged and detected by a first detector (S3); the controller selecting a target sample value from among the sample values as a formed-image reconstruction sample value, the formed-image reconstruction sample value corresponding to a target modulation pattern in the modulation pattern sequence (S4); repeating the above steps until each formed-image reconstruction sample value corresponds to each modulation pattern in the modulation pattern sequence on a one-to-one basis, and generating a formed-image reconstruction sample value sequence on the basis of each formed-image reconstruction sample value (S5); on the basis of the formed-image reconstruction algorithm, the controller performing image reconstruction on the formed-image reconstruction sample value sequence to generate a single formed image of the object to be imaged (S6); and repeating the above steps until a count of generated single formed images reaches a predetermined number (S7). The imaging system is capable of imaging, over an extended period of time, high-speed objects retracing a motion trajectory at varying velocity.

The invention discloses an optical system for high-speed reduction of a dynamic deformation process of a cornea, which realizes high-precision analysis of physical characteristics of the cornea through a high-speed imaging technology, performs error compensation on the physical characteristics and realizes high-precision calculation of intraocular pressure. According to the technical scheme, the optical system comprises a slit lamp light source used for forming a cornea optical slice and ensuring the definition and the contrast ratio of a cornea slice image; the Samm lens is used for shooting a cornea optical section, inclined imaging light path design is adopted, and the depth of field meets the requirement that the cornea section keeps clear imaging in the dynamic process; and the high-speed camera is positioned behind the Chemma lens and is used for receiving the cornea optical slice image imaged by the Chemma lens so as to record the dynamic deformation process of the cornea.

A method, medium and system for generating a high-rate video for displaying to a user on a display device. The method, medium and system may generate and display the high-rate video by: capturing images for a video at a first frame rate, capturing movement of a display device via a motion sensor, estimating a motion of the camera based on images of the video captured at the first frame rate and the movement of the display device captured via the motion sensor, generating the high-rate video at a second frame rate by up-sampling the video captured at the first frame rate, and displaying the high-rate video to the user.

The invention relates to a smooth blasting mesoscopic process visual analysis system and method. The system comprises a borehole peeping instrument, an optical endoscopic instrument, a high-speed camera and a data processing device. The drilling peeping instrument is used for checking and recording speckle changes on the blasting hole of the smooth surface; the optical endoscopic instrument is used for recording optical data of speckle movement and crack propagation images in the blasting process; the high-speed camera is used for recording optical data of speckle movement and crack propagation images in the blasting process; and the data processing device is used for tracking each mass point frame by frame according to optical data of the borehole peeping instrument, the optical endoscopic instrument and the high-speed camera, and determining the displacement of the mass point at each moment by maximizing a cross-correlation function. According to the scheme, the optical data of the rock mass in the blasting process can be accurately collected and recorded, and then through data processing, the rock mass smooth blasting mesoscopic process can be effectively and visually analyzed.

The present invention discloses a chopping type ultra-high speed high temporal and spatial resolution sequential shadow imaging system, which relates to the field of ultra-high speed imaging technology, including: a coupler for sending a light beam emitted by a multi-cavity light source subsystem into an optical fiber; a collimator for converting a divergent light beam output by an optical fiber into a parallel light beam; an imaging mirror for converging the parallel light beam passing through a test area to an imaging subsystem; a data acquisition and processing subsystem for imaging images of the test area at different times, and for remotely transmitting and processing the imaged images; a timing control subsystem; and also includes: a liquid homogenization mechanism arranged on the optical fiber output path. The present invention provides a chopping type ultra-high speed high temporal and spatial resolution sequential shadow imaging system, and takes into account ultra-high speed sequential front light imaging. Through the liquid homogenization technology, the background uniformity of each image will be greatly improved, and the imaging resolution will be improved accordingly.

To provide a stroboscope for weaving machines, which allows for efficiently adjusting the delay angle.SOLUTION: A stroboscope 10 for weaving machines is provided, comprising a light emitter 11, and a trigger control unit 13a configured to output a trigger signal to the light emitter 11 to cause the light emitter 11 to emit light when a main shaft 101 of a weaving machine 100 turns to cause the rotation angle to change by a delay angle from a reference angle. The trigger control unit 13a causes the delay angle to change by a given variation width within a given variation range.SELECTED DRAWING: Figure 1

A method and a system for single-shot multi-frame ultrafast terahertz imaging of a scene, the method comprising generating a pump beam and a probe beam: generating a THz beam from the pump beam and passing the THz beam through the scene: multiplexing the probe beam in the time domain and in the spatial-frequency domain, yielding a multiplexed probe beam; detecting a THz beam passing through the scene; guiding the multiplexed probe beam to a THz detection crystal and converting the multiplexed probe beam into mutually orthogonal linear polarized beams; guiding the mutually orthogonal linear polarized beams to a camera; and recovering frames of the scene from multiplexed images acquired by the camera.

The application discloses a device for shooting the initial shape of an explosively formed penetrator, which comprises a high-speed camera room and an anti-reflection background; a support is arranged in a light filter protection device to fix a warhead for generating the explosively formed penetrator; the light filter protection device is arranged on one side of the high-speed camera room and the anti-reflection background and is provided with a penetrator channel to shield explosion fire and detonation products generated by the warhead explosion, so that the high-speed camera is not overexposed by the explosion fire, and the image of the explosively formed penetrator generated by the warhead explosion is shot; the axis of the penetrator channel is coplanar with and perpendicular to the lens axis of the high-speed camera. The shooting device can weaken the explosion fire, reduce the concentration of the detonation products accompanying the flight of the penetrator, and provide sufficient light intensity for the flying body, so that the initial shape of the explosively formed penetrator is captured.

The application discloses an ultrafast imaging device and method, which comprises, along an optical path, an ultra-short pulse laser, a time-domain shaping mechanism for separating the ultra-short laser pulse into light of different wavelengths and separating the light of different wavelengths in time, a space-domain shaping mechanism for separating the light of different wavelengths after time separation into multiple regions and converting the light into multiple parallel light beams to irradiate the sample at different incident angles, an objective lens for multiple frame imaging of the sample after irradiating the sample, a second convex lens array for mapping each frame of image to different positions of a high-speed camera, and a high-speed camera for simultaneously capturing multiple frames of images of the ultrafast phenomenon. The application has the advantages of simple structure, high stability, convenient operation, conventional elements, low cost for capturing the ultrafast phenomenon, flexible setting of the imaging time scale in the range of femtosecond or picosecond, and integration of multiple super-resolution and high-field methods.

The invention discloses a four-exposure image acquisition method, belongs to a non-contact image acquisition technology, and aims to solve the problem that high-frequency and large-view flow field measurement cannot be realized simultaneously because a laser and a camera are not matched in the prior art. Equipment used in the method comprises two groups of convex lenses, a pyramid reflector, two groups of reflectors, an image sensor and a diaphragm, an optical signal of an object to be measured passes through the lenses and the diaphragm and then is divided into two paths by the pyramid reflector to reach corresponding channels, and the optical signal is captured by the image sensor after passing through the reflectors. The two groups of sensors are exposed for four times in one period, the time difference dt1 of two times of exposure of the first sensor is equal to the time difference dt3 of two times of exposure of the second sensor, and the exposure interval dt2 of the two sensors can be adjusted to be 1 / 2000 s to (1 / 200-1 / 2000) s. According to the invention, the signal acquisition efficiency is high, the intensity of each picture is consistent, and the velocity field measurement of the overall frequency of 200Hz and the local highest frequency of 2000Hz can be realized by matching with a multi-pulse laser.

The present invention relates to the field of ultrafast imaging technology, and discloses an ultrafast imaging device based on vector space encoding, comprising: an ultrafast pulse laser, a pulse shaper, which regulates a single pulse emitted by the ultrafast pulse laser to obtain a pulse envelope corresponding in time and spectrum; a reflective dark field microscopy imaging system, disposed after the pulse shaper, causing the pulse envelope to illuminate a target in a first direction and then reflect, emitting the reflective dark field microscopy imaging system in a second direction; a vector space encoding optical system, disposed in the second direction, comprising: a 4F optical system and a multilayer film phase plate disposed in the 4F optical system, the multilayer film phase plate being used to optically encode the pulse envelope; and an imaging system, disposed at the output surface of the 4F optical system, which obtains an encoded vector space image. The present invention achieves single-exposure ultrafast imaging by using a sub-wavelength multilayer film phase plate and utilizing the vector space characteristics of light of different frequencies for encoding.

The present invention discloses a synchronous timing control system for high-repetition-rate burst pulse laser illumination measurement, which relates to the field of laser illumination measurement technology. The system includes a first signal generator, a second signal generator, a third signal generator, a laser seed source, a laser amplifier, and a camera system. The first signal generator is configured to output a first control signal to the laser seed source and a second control signal to the second signal generator. The third signal generator is configured to output a third control signal to the laser amplifier and a fourth control signal to the second signal generator. The second signal generator generates a camera trigger signal based on the second control signal and only outputs the camera trigger signal to the camera system within the high-level range of the fourth control signal. The present invention ensures that camera exposure is strictly synchronized with the laser pulse, allowing the camera system to capture the laser illumination effect throughout the entire duration of the macropulse.

[Problem] To provide an imaging device and an imaging method with which it is possible to easily switch a double-speed setting without changing a clock and simplify a structure. [Solution] Provided are an imaging device that supports N-times faster imaging and an imaging method therefor, wherein an exposure control unit 7 causes a sensor 2 to be exposed in an exposure period in which exposure is performed at an M-fold speed equal to or less than the numerical value N of an N-fold speed for the video inputted from a lens. The exposure control unit 7 further exercises control by an exposure control signal so that a pixel signal is outputted in the same output period as the N-fold speed after the end of the exposure period and a given period after the end of the output period that corresponds to the numerical value M of an M-fold speed is made a disable period in which no pixel signals are outputted. A video rate conversion unit 5 outputs M frames of the M-fold speed video signal at the same timing as the N-fold speed.

The invention discloses an ultrafast imaging device and an ultrafast imaging method. The ultrafast imaging device comprises an ultrashort pulse laser; the time domain shaping mechanism is used for dividing the ultrashort laser pulse into light with different wavelengths and separating the light with different wavelengths in time; the airspace shaping mechanism is used for dividing the light with different wavelengths after time separation into a plurality of regions and converting the light into a plurality of beams of parallel light to irradiate a sample at different incident angles; the objective lens is used for performing multi-frame imaging on the sample by using the light with the sample information after the sample is irradiated; the second convex lens array is used for mapping each frame of image to different positions of the high-speed camera; and the high-speed camera is used for simultaneously capturing multiple frames of images of the ultrafast phenomenon. The device is simple in structure, high in stability and convenient to operate, the used elements are conventional elements, the ultrafast phenomenon can be captured with low cost, the imaging time scale can be flexibly set in a femtosecond or picosecond level range, and integration of various super-resolution and high-view-field methods is facilitated.

The invention discloses a device and a method for high-speed imaging of periodic liquid drops, and the device comprises a liquid drop generator which is used for generating a periodic stable liquid drop sequence; an imaging lens of the imaging unit images the image of the liquid drop to a common camera, the camera converts a received optical signal into an electric signal, and a computer processes the electric signal to obtain the image of the liquid drop and displays the image; the lighting unit comprises a stroboscopic light source and a light source controller, the stroboscopic light source is used for lighting the liquid drops, and the light source controller controls the stroboscopic light source; and the signal generator outputs a signal to synchronously control the stroboscopic frequency of the stroboscopic light source and the frame rate of the camera. Based on the mathematical relationship between the frame rate of the camera and the time interval of the two adjacent frames of images, the high-speed imaging of the periodic liquid drops is realized by adjusting the frame rate of the common camera, the problems of complex structure, high price, small field of view and low space and time resolution of the high-speed imaging device of the periodic liquid drops are solved, and the high-speed imaging device of the periodic liquid drops is suitable for high-speed imaging of the periodic liquid drops. The cost and the space of the periodic liquid drop high-speed imaging device are saved, and the image quality is improved.

The invention discloses a device for improving time uniformity of a framing camera based on curve pulses. The device comprises a cathode, an anode, a drift region, an MCP framing camera and a fluorescent screen which are arranged in sequence, the output end of a curve pulse generation circuit is connected with the initial end of the cathode, and the anode is grounded. The curve pulse generation circuit is composed of an IGBT driving module, a transformer coupling voltage reduction isolation module and a second-order Butterworth high-pass filtering module, and can generate curve pulses with non-linear change of the rising slope and apply the curve pulses to the cathode. Compared with the prior art, the single-path curve pulse is adopted to replace a traditional multi-pulse superposition scheme, the time uniformity of the pulse broadening framing camera is remarkably improved, and meanwhile the system structure is simplified.

A processor-implemented method with image acquisition includes acquiring image frames comprising a shutter-off frame corresponding to a shutter-off through a sensor by performing the shutter-off during continuous shooting, acquiring a measurement signal corresponding to a target image frame, removing, based on a target shutter-off frame corresponding to the target image frame, a first remaining signal corresponding to the target shutter-off frame from a measurement signal corresponding to shutter-off period frames comprising image frames between the target image frame and the target shutter-off frame, and generating a target image frame from which a second remaining signal is removed based on one or more of the shutter-off period frames from which the first remaining signal is removed.

An electronic device and a method for controlling same are disclosed. The electronic device includes a first camera having a first lens with a first focal distance, a second camera including a second lens having a second focal distance different from the first focal distance, a memory, and a processor which: acquires information on a first object included in a first image acquired by capturing surroundings of the electronic device through the first camera if it is identified, based on of the acquired information on the first object, that information on a second object associated with the first object exists, acquires a second image through the second camera and based on whether the second object is included in the acquired second image, determines a point of time when high-speed image capture is to be performed using the first camera.

This stroboscope for a loom (10) comprises: a light emitter (11); and a trigger control unit (13a) that outputs to the light emitter (11) a trigger signal for causing light emission by the light emitter (11) when the rotation angle of a spindle (101) of the loom (100) rotates by a delay angle from a reference angle. The trigger control unit (13a) changes the delay angle by a prescribed variation width within a prescribed variation range.

The invention discloses a device for shooting the initial form of an explosion-formed penetration body. The shooting device comprises a high-shooting laying room and an anti-reflection background which are spaced and opposite to each other, the support is arranged in the light filtering protection device and used for fixedly installing a warhead generating explosion to form a penetration body. The light filtering protection device is arranged on one side of the high-speed camera laying room and the anti-reflection background, is provided with a penetration body channel, and is used for shielding explosion fire light and detonation products generated by the explosion of the warhead and preventing the explosion fire light from causing an overexposure phenomenon of the high-speed camera so as to shoot an image of an explosion-formed penetration body generated by the explosion of the warhead; the axis of the penetration body channel and the lens axis of the high-speed camera are coplanar and perpendicular. According to the shooting device, explosion fire light is weakened through the light filtering protection device, the concentration of detonation products flying along with the penetration body is reduced, and meanwhile sufficient light intensity is provided for the flying body, so that the initial form of the explosion-formed penetration body is captured.

An electronic device is provided. The electronic device includes at least one processor configured to obtain a plurality of first images for one or more objects as per a first frame rate using the camera based on a signal related to image recording and control the camera to perform focusing of a lens included in the camera on at least one of the one or more objects while obtaining the plurality of first images, provide a first portion of the plurality of first images as a preview through the display, control the camera to lock the focusing to prevent a change of the focusing on the at least one object, and identify a designated event related to obtaining the plurality of first images.

The invention relates to a method for determining at least one physical characteristic of a belt drive and / or a belt in the belt drive in a static and / or dynamic operating state. The invention also relates to a computer program for implementing such a method. Furthermore, the invention relates to a device for determining at least one physical characteristic of a belt drive and / or a belt in a belt drive in a static and / or dynamic operating state.

The present invention is applicable to the field of ultrafast optical imaging and provides a compact single-shot ultrafast framing direct imaging device, comprising: a femtosecond laser; a frequency multiplier; a beam splitter for splitting the frequency-doubled light and the remaining un-frequency-doubled fundamental light; a stretcher for pulse-stretching the fundamental light to obtain signal light; a temporal-spatial encoding system for splitting the signal light after irradiating an object into a two-dimensional array of equal-intensity sub-beams, and adding different time delays to each sub-beam in the array to obtain an illumination signal light array with different time delays that carries object information; a delayer for adjusting the delay of the pump light to synchronize the pump light with the illumination signal light array; and an optical parametric amplification imaging system for coupling the illumination signal light array with the delayed pump light to generate idler light carrying object information and record the image. This device achieves single-shot multi-frame imaging while maintaining high temporal and spatial resolution.

An electronic device may comprise a camera, a sensor circuit, a memory, and a processor configured to obtain a plurality of first images including a region of interest (ROI) based on a first frame rate using the camera, detect a movement of the electronic device using the sensor circuit, identify a threshold related to a movement of the ROI based on the movement of the electronic device, wherein the threshold related to a movement of the ROI is identified as a first threshold, and the threshold related to the movement of the ROI is identified as a second threshold larger than the first threshold, obtain a plurality of second images based on a second frame rate larger than the first frame rate in response to an object moving at the first threshold or the second threshold in the ROI, and provide a video related to the object.

The utility model relates to the technical field of optical test equipment, in particular to a filter wheel and a filter device, the filter wheel comprises a wheel carrier, the wheel carrier is a hollow regular polygon prism structure with even-numbered edges, and the end part of the wheel carrier is provided with a connecting shaft; the two opposite side walls of the wheel carrier are evenly provided with the optical filters and the light-transmitting pieces, the optical filters and the light-transmitting pieces are the same in size and weight, the rotating shaft can be prevented from blocking an optical path, global imaging of the optical filtering area can be achieved, the imaging quality of optical equipment can be ensured, and the optical equipment has the advantage of being wide in application range. The light filtering device comprises a mounting bracket; according to the filter wheel, the wheel carrier is connected to the mounting bracket through the connecting shaft, and the wheel carrier can rotate around the axis of the connecting shaft; and the driving assembly is in transmission connection with the connecting shaft.