134 results about "Single exposure" patented technology

The invention discloses a monocular four-dimensional imaging device and method based on a metasurface. The monocular four-dimensional imaging device comprises an image sensor and an imaging optical system arranged in front of the image sensor. Wherein the imaging optical system comprises a metasurface, the metasurface is designed to simultaneously generate a self-acceleration Airy point spread function with depth-dependent lateral displacement for incident left-hand circularly polarized light and right-hand circularly polarized light, and the self-acceleration Airy point spread function can generate a self-acceleration Airy point spread function with depth-dependent lateral displacement under the condition that a mechanical moving part is not used. Carrying out polarization separation and focusing on the left-hand circularly polarized light and the right-hand circularly polarized light; the image sensor is used for recording a mixed image containing the left-hand circularly polarized light information and the right-hand circularly polarized light information at the same time through single exposure so as to obtain three-dimensional depth and polarization information of the metasurface, namely monocular four-dimensional imaging of the metasurface. The scene perception and understanding capability of a machine is greatly enhanced, and the method has unique advantages in the aspects of target identification, material discrimination, severe environment perception and the like.

The invention provides a photogrammetry control method and device based on a laser galvanometer and electronic equipment, and belongs to the technical field of photogrammetry, and the method comprises the steps: controlling the laser galvanometer to deflect according to a preset scanning path in a single exposure period of a camera, so as to form n laser gratings in a single frame image collected by the camera; extracting feature information of each laser grating from the single-frame image, wherein the feature information comprises pixel coordinates in a space coordinate system; and calculating three-dimensional coordinate points of the surface of the object to be measured according to the real-time deflection angles of the laser galvanometer when the laser galvanometer projects the laser gratings, the feature information of the laser gratings and pre-calibrated camera parameters, and summarizing to generate three-dimensional point cloud data. According to the invention, the precision of photogrammetry is improved.

The invention discloses a spectral space coding imaging system and method of a programmable diffractive optical element. The method comprises the following steps: S10, receiving a target scene light signal through a light field model and forming an optical image; s20, performing spatial spectrum joint modulation on the optical image by adopting a programmable diffractive optical element to obtain a coded light field; s30, projecting the coding light field to a detector and obtaining a two-dimensional coding image of primary exposure; and S40, inputting the two-dimensional coding image into a reconstruction module, combining modulation information of the programmable diffractive optical element, and performing decoding reconstruction by using a compressed sensing algorithm to obtain a high-resolution space image and spectral information of the scene. According to the invention, the limitation of the existing system on spatial / spectral resolution is broken through, the system structure is simplified, and the hardware programmability is improved; the imaging capability in a dynamic scene is improved; the signal-to-noise ratio and the penetrating power are improved; and balancing a physical model and a data driving method.

The invention discloses a wide-spectrum high-resolution hyperspectral video imaging method and device, and the method comprises the steps: carrying out the feature extraction of a plurality of wide-spectrum aliasing wide-spectrum hyperspectral video frames captured by a wide-spectrum hyperspectral sensor in single exposure imaging, and obtaining a hyperspectral output feature; the method comprises the following steps: extracting features for panchromatic video frames of the same scene captured by a panchromatic sensor to obtain panchromatic output features, splicing wide-band spectrum hyperspectral video frames and the panchromatic video frames, and extracting features to obtain space-spectrum features; fusing the hyperspectral output feature, the panchromatic output feature and the space-spectral feature to obtain a final coding feature; the encoded features are decoded to obtain a high resolution hyperspectral video frame. The method aims at recovering spectral information of more wavebands from aliasing spectrums, the problems of spectral aliasing and the like are solved through fusion imaging, and high-resolution hyperspectral videos are obtained.

The invention discloses a micro-lens array non-scanning type laser interference three-dimensional imaging method and device for a dynamic sample, and relates to the technical field of optical three-dimensional measurement and imaging, and the method comprises the steps: dividing laser into object light and reference light; irradiating a dynamic sample arranged at the focal plane of the micro-lens array with the object light after beam expansion, modulating the object light carrying sample information by the micro-lens array, and combining the modulated object light with the reference light in space to generate a composite interference field containing a plurality of sub-region interference patterns; recording a single-frame composite interferogram by an area array detector; and finally, reconstructing the three-dimensional morphology of the sample at the measurement moment through a phase extraction and unwrapping algorithm. By means of the mode, full-view-field three-dimensional information can be obtained through single exposure by means of the microlens array, mechanical scanning or multi-frame phase shifting is not needed, the problem of motion artifacts generated when a dynamic sample is measured through a traditional interference method is effectively solved, and high-speed and high-resolution three-dimensional imaging of the surface appearance of the dynamically-changed sample is achieved.

The invention discloses a camera time sequence control method, electronic equipment and a driver monitoring system, and relates to the technical field of artificial intelligence. The method is suitable for a camera of an image sensor, and the exposure starting time of photosensitive pixels in all rows or columns of the camera is sequentially staggered, and according to the single exposure duration, the effective imaging time and the periodic time sequence interval of the image sensor, the exposure starting time of the photosensitive pixels in all rows or columns is calculated. Under the condition that the total energy of infrared radiation received by each exposure pixel is the same, determining the light-emitting duration of the light-supplementing light source; according to the effective imaging time, the frame blanking time and the light-emitting duration, determining a light-emitting starting moment under the condition that the starting position of a light-emitting signal of the current frame image is located at the last time slice before the end of the previous frame image; and generating a control signal corresponding to the light supplementing light source according to the light emitting starting time and the light emitting duration. According to the invention, the problems of high cost and large image noise in related technologies can be solved, the cost can be effectively reduced, and the image effect can be optimized.

The application provides a method for obtaining a multispectral image through single exposure, an endoscope system and electronic equipment. The method comprises the following steps: obtaining an original image within a single exposure time, wherein the original image is obtained by sequentially imaging a light signal on a main light path of the endoscope system through a lens array and a continuous variable filter; dividing the original image into a plurality of sub-images corresponding to different channels in the lens array, wherein different sub-images correspond to different wave bands and different channel response coefficients; and performing normalization correction on the corresponding sub-images according to the wave bands and the channel response coefficients, so as to eliminate the response difference between different channels and obtain a sequence image of multiple wave bands. Through multiple parallel channels, a plurality of sub-images with different spectral responses are obtained within a single exposure, and the rapid acquisition of multispectral information of an endoscope is realized.

The invention discloses a multi-exposure offset method for improving PCB ink color difference and a medium. The multi-exposure offset method comprises the following steps: preparing a PCB substrate coated with ink; determining the power ratio of a plurality of lasers in the laser direct imaging equipment; an exposure parameter set corresponding to the multiple exposure modes is established, the exposure parameter set at least comprises an exposure dose parameter and an exposure starting point offset parameter, and the total exposure dose of the multiple exposure modes is equivalent to the single exposure dose required for improving the chromatic aberration target; based on the exposure parameter set, the laser direct imaging equipment is controlled to execute at least two times of exposure operation on the same target pattern area on the PCB substrate, and the starting point positions of the exposure operation are different from one another. According to the invention, multiple exposure is carried out by setting different starting points for the same pattern area, so that the light path energy is dispersed and homogenized, the chromatic aberration in PCB ink exposure is efficiently compensated, and the product yield is improved.

The invention discloses a single frequency domain holographic ultrafast imaging system and method based on two-step phase shift. The ultrafast imaging system comprises a light source part used for generating linearly polarized femtosecond laser pulses; the chirp laser pulse part is connected with the light source part and is used for broadening the femtosecond laser pulse into a chirp laser pulse; the single two-step phase shift part is connected with the chirp laser pulse part and is used for splitting the chirp laser pulse into reference light and signal light and generating two groups of phase shift interferograms with fixed phase difference based on the reference light and the signal light; wherein the two groups of phase shift interferograms are generated at the same time under single exposure; and the spectral imaging part is connected with the single two-step phase shift part, and is used for recording the two groups of phase shift interferograms at the same time, and reconstructing the phase information of the sample through a preset phase reconstruction algorithm. Therefore, through optical system design, two groups of phase shift interferograms are simultaneously obtained through single exposure, time delay and phase errors caused by traditional step-by-step acquisition are avoided, and the method is suitable for observation of a femtosecond ultrafast dynamic process.

The invention belongs to the technical field of optical imaging, and discloses a non-intrusive imaging method and device penetrating through a dynamic scattering medium, and the method comprises the steps: controlling a preset coherent object light beam to irradiate an object to be imaged, and forming an object light field; collecting a speckle intensity image of a speckle field formed by an object light field penetrating through the preset dynamic scattering medium in a far-field region, wherein the far-field region is a region of the preset dynamic scattering medium penetrated by the object light field; based on a four-moment correlation function of the speckle intensity image, analyzing to obtain a far-field mutual dry function; according to a function relationship between the far-field mutual coherence function and the object light field autocorrelation function, analyzing to obtain an autocorrelation function of the object to be imaged; and based on a phase recovery algorithm, reconstructing an image of the to-be-imaged object through the autocorrelation function. According to the invention, view field limitation caused by dependence on an optical memory effect is avoided, imaging can be completed through single exposure, a data acquisition process is simplified, and adaptability to a dynamic scattering medium and imaging efficiency are improved.

This application relates to the field of optoelectronic imaging technology, specifically to an image sensor, imaging device, and imaging method. The image sensor includes a pixel array, which comprises multiple functional units arranged in an array. Each functional unit includes at least two pixel sub-units. Each pixel sub-unit includes at least two polarization pixels and at least one spectral pixel. The spectral pixel includes a first photosensitive pixel layer and a narrowband filter layer. In each functional unit, the narrowband filter layer of the spectral pixel corresponding to the at least two pixel sub-units has a different center wavelength. This application enables efficient acquisition of polarization and spectral information through a single exposure and effectively reduces device size and manufacturing costs.

The utility model provides a chip bonding wire three-dimensional measurement system based on an inner cavity reflection camera system. The chip bonding wire three-dimensional measurement system comprises a microscope lens, a reflector cavity, a relay lens, an industrial camera and an illumination module. Two parallel plane mirrors are arranged in the reflector cavity and used for separating a first real image imaged by the microscope lens into three independent light paths to form a three-view virtual image, and the three-view virtual image is transmitted to a photosensitive chip of the industrial camera through the relay lens at the amplification factor of 1: 1, so that three-view images are acquired through single exposure. The system is matched with a computer to carry out optical flow calculation, point cloud fusion and three-dimensional reconstruction, a three-dimensional grid model with texture colors is generated, and high-precision and non-contact measurement of the multi-layer lead shielding structure is achieved. The system is compact in structure, easy and convenient to install and adjust and suitable for on-line detection of bonding and packaging of vehicle-gauge-level chips.

The utility model discloses an O wave band end face coupler based on a silicon nitride multi-cone waveguide. The O wave band end face coupler is characterized in that a waveguide layer is composed of three double-cone input waveguides, two double-cone waveguides, a single-cone waveguide and a straight waveguide connected with the single-cone waveguide; according to the utility model, through the introduction of the multi-conical structure of the biconical input waveguide, the biconical waveguide and the single-conical waveguide, the mode mismatch between the waveguides and the optical fiber is effectively reduced, so that the loss caused by mode adaptation is reduced, the efficient optical coupling between the optical fiber and a chip is realized, and the structure between the waveguides is compact; only single exposure and etching are needed, the process complexity is reduced, the coupling loss in the O wave band is low, and the bandwidth is large.

The application discloses a kind of full solid, snapshot type full stokes parameter measurement and imaging enhanced sensor device, including microlens array module, liquid crystal phase modulation module, polarization grating array module and image sensor module.Microlens array module is composed of many small lens two-dimensional arrangement, focusing on the photodiode of each pixel on incident light.Liquid crystal phase modulation module is composed of two high-speed liquid crystal variable phase retarder, realize the polarization state of incident light active phase modulation.Polarization grating array module only needs single shooting to obtain four polarization directions of polarized light information.Image sensor module calculates the full stokes parameter polarization characteristics of incident light.The application only needs single exposure to realize the full polarization information measurement of incident light, and after completing measurement, it turns into polarization enhancement mode, greatly improves the imaging efficiency of sensor in weak contrast target detection and other dark light scene.

The invention discloses a neural network enhanced wavefront sensing method and system based on a metasurface and double-helix PSF coding, and the method comprises the steps: loading a preset reference phase diagram and a to-be-measured phase diagram on unmodulated parallel light through a spatial light modulator, thereby generating a reference wavefront and a to-be-measured wavefront; mutually orthogonal double-helix phase distribution is generated by using the polarization multiplexing super-structure surface, and a reference double-helix point spread function image and a to-be-measured double-helix point spread function image are obtained; and outputting a phase distribution matrix of the wavefront to be measured by using the self-calibration dual-encoder neural network to realize synchronous reconstruction of the dual-channel wavefront. The method can realize high-resolution real-time wavefront measurement under single exposure, has high robustness and expandability, and is suitable for the fields of adaptive optics, polarization imaging, optical communication and the like.

This invention discloses a motor appearance inspection production line, including a frame, a conveying device, a top surface inspection device, a five-sided inspection device, and an endoscopic inspection device. The endoscopic inspection device is positioned between the top surface inspection device and the five-sided inspection device along the conveying direction. In the appearance inspection process, the endoscopic inspection device first inspects the internal condition of the motor. Before the five-sided inspection, motors that fail the endoscopic inspection are graded and removed to the first or second NG line, avoiding the waste of five-sided inspection resources by defective motors. Endoscopic and appearance inspections are integrated in one step. The five-sided inspection device uses a transparent motor placement platform combined with a surrounding reflector group and a bottom single-camera architecture. Transmission imaging of the motor's bottom surface and reflection imaging of the four sides are acquired simultaneously in a single exposure, without the need for flipping. This invention eliminates the constraint of the flipping process on production cycle time, achieving highly efficient and automated integrated inspection of motor appearance and endoscopy.

The application discloses a kind of spectral modulation radiation temperature measuring device and method, belongs to optical radiation temperature measuring technical field.For the problems, such as limited spectral channel, difficult to realize single-exposure multi-channel synchronous acquisition, temperature measuring stability and insufficient inversion robustness of existing radiation temperature measuring technology under long-distance, high dynamic and complex background conditions, the present application sets up wide-spectrum modulation optical window at the incident end, and combines wide-spectrum modulation multi-modal spectral chip, to synchronously acquire multi-channel wide-spectrum modulation radiation image under single exposure;Pretreatment is carried out using system on chip, and wide-spectrum modulation response model, emissivity spectral basis expansion model and time domain regularization are fused in temperature inversion calculation platform, to realize stable inversion of real temperature field, emissivity distribution and temperature rising sequence, suitable for non-contact temperature measurement in long-distance high-temperature target and other fields.

The invention discloses a single-light-source energy spectrum imaging device, and relates to the field of medical science and technology, the single-light-source energy spectrum imaging device comprises a ray light source, a detector assembly and a shooting grid assembly, the detector assembly and the shooting grid assembly are both arranged in the emitting direction of the ray light source, and the detector assembly is used for synchronously collecting at least two types of ray image signals in single exposure of the ray light source; the at least two types of ray image signals correspond to different energy ranges; the emission grid assembly is located between the ray light source and the detector assembly and comprises an enhanced anti-scattering grid, a micropore array is arranged on the enhanced anti-scattering grid and used for allowing rays to pass through, the enhanced anti-scattering grid comprises a barrier layer and an absorption layer, and the absorption layer is arranged on the surface of the barrier layer in a composite mode. The absorption layer is used for absorbing the characteristic rays generated by the barrier layer. The technical problems that in existing single-light-source single-exposure dual-energy imaging, scattered rays are prone to polluting detector signals, energy spectrum data distortion is caused, and image artifacts are serious are solved.

The invention discloses a direct-writing photoetching system, method and device. The system comprises a mechanical subsystem, an optical subsystem and an electric control subsystem, the electric control subsystem is used for determining an exposure mechanism conforming to the exposure dot matrix image and determining the moving position of the mechanical subsystem; the optical subsystem is used for providing a light source, correcting optical distortion and generating an exposure dot matrix image under the control of the electric control subsystem; a substrate coated with photoresist is carried on the mechanical subsystem, and the mechanical subsystem is used for moving from a first position to a second position after single exposure under the control of the electric control subsystem; the distance between the first position and the second position is an integer, and p is the grid width. By adopting the system, the exposure speed of the exposure dot matrix image can be improved, and the requirement on the mobility performance of the workpiece table is reduced.

The application belongs to the technical field of optical precision measurement, automation control and artificial intelligence, and particularly relates to an interference optical path for obtaining multiple information in single exposure and application thereof, the interference optical path comprising: rotating a polarization direction of a light source through a half-wave plate to obtain first linearly polarized light; the first linearly polarized light is evenly divided into reference light and test light by a common beam splitter; the reference light passes through a quarter-wave plate back and forth to obtain second linearly polarized light orthogonal to the first linearly polarized light; the test light is decomposed into third linearly polarized light and fourth linearly polarized light by a Wollaston prism; the third linearly polarized light and the fourth linearly polarized light irradiate on a measured object, pass through the Wollaston prism again after reflection, and are combined with the second linearly polarized light at the common beam splitter; the combined light beam is received by a polarization resolution camera and records interference signals.The application can realize absolute phase reconstruction in single exposure, and is suitable for measuring refractive index distribution of dynamic or environment-sensitive samples.

The invention discloses a single-photon multi-mode structured light HDR three-dimensional imaging method and system, and belongs to the technical field of optical three-dimensional imaging and machine vision, and the system comprises a projector, a common camera, a single-photon camera and a data processing system. The projector is used for projecting N-step phase-shifted sine stripe patterns to a measured object, and N is greater than or equal to 3; the single-photon camera is used for collecting a binary image cube corresponding to the sine stripe pattern; the common camera is used for synchronously collecting the sine fringe pattern to obtain a clear fringe pattern; the data processing system is used for executing the single-photon multi-mode structured light HDR three-dimensional imaging method, the single-photon sensitivity of the single-photon camera and the high resolution of a common camera are fused under single exposure, and the double limitation of low photon and high dynamic range is broken through. Through digital twinning and transfer learning, the problems of nonlinear error and data scarcity of stripe acquisition of a single-photon camera are solved, so that unified coordinate system HDR reconstruction of a multi-mode structured light system is realized.

The invention relates to a wavefront measurement method based on a modulation type Shack-Hartmann wavefront sensor, the modulation type Shack-Hartmann wavefront sensor comprises a composite laminated modulation device and a detector, and the composite laminated modulation device is composed of a microlens array and a binary random coding mask. The method comprises the following steps: acquiring a composite diffraction pattern which is collected by a detector and is coherently modulated by a composite laminated modulator; wherein the composite diffraction pattern has diffraction texture features, and the diffraction texture features are obtained by coding after coherent modulation is carried out on high-frequency phase information through a binary random coding mask; reconstructing a high-frequency complex wavefront based on the diffraction texture features by adopting a coherent modulation phase recovery algorithm; and outputting the high-frequency complex wavefront as a wavefront measurement result. According to the scheme provided by the invention, unified measurement of high spatial resolution and wide dynamic range can be realized under the condition of single exposure, so that the inherent limitation of the SHWFS between the spatial resolution and the dynamic range in the related technology is broken through.

This application discloses a shutter device, a shutter control system, and a photolithography apparatus, belonging to the field of semiconductor equipment. The shutter device of this application includes: a driving unit comprising a stator assembly and a mover assembly; the stator assembly includes a stator yoke and a magnet array, with multiple magnets in the magnet array circumferentially distributed on the stator yoke and adjacent circumferential magnets in close contact with each other; the mover assembly includes a coil holder with a symmetrical structure and a coil group supported thereon, the included angle between the first crossbeam and the second crossbeam in the coil holder being an obtuse angle; a light-shielding unit comprising blades; and a connecting unit connecting the driving unit and the light-shielding unit; the driving unit drives the light-shielding unit to reciprocate, thereby opening and closing the light path. In this application, the stator assembly increases the output torque of the driving unit, enabling rapid opening and closing of the blades; the mover assembly provides greater mechanical clearance space for blade rotation, enabling large-angle opening and closing of the blades, increasing the light-transmitting aperture of the shutter device, reducing the time consumed per exposure, and improving photolithography yield.

The application relates to the technical field of photoelectric detection, and particularly discloses a three-dimensional defect detection method and system based on complex color stripe projection, which comprises an upper computer control and processing module, a structured light projection module and an imaging module. The upper computer control and processing module is used for generating a complex color stripe pattern coded with phase difference information and coordinating and controlling the synchronous operation of the whole system. The structured light projection module is used for receiving the complex color stripe pattern and projecting the complex color stripe pattern onto the surface of a measured object at one time. The imaging module is used for receiving the reflected complex color light modulated by the surface of the measured object, separating the complex color light into monochromatic light signals of different colors and synchronously collecting the monochromatic light signals. The imaging module further comprises an active high light suppression unit which is used for dynamically adjusting the polarization direction according to the instruction of the upper computer control and processing module so as to suppress the high light caused by the mirror reflection. By projecting a plurality of groups of sinusoidal stripes with fixed phase difference onto the surface of the measured object at one time, a plurality of deformed stripe patterns with phase shift can be synchronously collected under single exposure.

This invention discloses a lensless fiber bundle phase imaging method. The method includes: acquiring a single-exposure image of a sample through an optical fiber under multi-wavelength illumination; obtaining light intensity data for reconstruction by multi-channel separation and correction of the image; reconstructing the diffraction image of the sample based on the obtained light intensity data by removing the fiber bundle structure; establishing a lensless fiber bundle imaging model and correlating the diffraction image with the complex amplitude distribution of the sample; constructing an objective function for optimization and solving to obtain the amplitude image and phase image of the sample. This invention eliminates the need for lenses in the fiber bundle, offering advantages such as simple structure and suitability for miniaturized systems, and enables stable quantitative phase imaging under single exposure.

The application belongs to the technical field of X-ray scattering test, and particularly relates to a kind of ultra-small angle / small angle X-ray scattering synchronous measurement device and method, vacuum flight pipe, high-speed CdTe detector and high-temperature high-pressure in-situ sample environment are combined, through the same frame trigger of front two-dimensional detector D1 and rear two-dimensional detector D2, q axis unified calibration and overlapping area self-calibration splicing, full spectrum scattering curve across nanometer-micron scale can be obtained in single exposure, USAXS and SAXS are collected synchronously in the same frame, the repeatability of wide q domain measurement is improved, and it is suitable for in-situ observation of irreversible rapid evolution process;"Virtual aperture" is formed by spatial biasing, low q end data is obtained without blocking direct beam path, and low angle loss caused by beam blocking is reduced;Through the quantifiable overlapping area self-calibration splicing strategy, the consistency and acceptability of cross-scale data are improved;Through the adjustable design of L1, L2 and g, the q coverage resolution requirement is considered in limited flight distance.

The invention discloses a multi-reflection suppression method and device based on a super depth-of-field fusion algorithm, and relates to the technical field of image processing, and the method comprises the steps: integrating a micro lens array and a micro polarizer array to carry out the single exposure of a scene, generating a multi-depth-of-field image sequence after decoding, and outputting a four-dimensional data cube; based on the four-dimensional data cube, generating a global clear image and an intermediate polarization degree panoramic depth image through double-path parallel super depth-of-field fusion; outputting a reflective mask and a repair image through a reflective repair model by using the intermediate image; and performing pixel-level fusion with the global clear image by taking the reflective mask as a guide to generate an anti-reflection super-definition image. The objective of the invention is to solve the technical problem that a conventional super-depth-of-field fusion algorithm may fuse a reflection area as a clear feature into a final image in a scene with mirror reflection, so that the reflection is enhanced but not suppressed.

Single-mask X-ray imaging simultaneously captures attenuation, differential phase contrast (DPC), and dark-field images in a single exposure by capturing multiple contrast features like dark field and differential phase contrast using mask alignment with relatively low-resolution detectors and smaller magnification. New light transport models are used for various system configurations to effectively extract contrast features from various single mask X-ray configurations, thereby eliminating the need for highly coherent X-ray sources, ultra-high-resolution detectors, and intricate gratings, and as such simplifying the imaging process and significantly reducing costs and improving the prospects of clinical translation. Three variations of the single-mask setup are each optimized for different contrast types, offering flexibility and efficiency in a variety of applications.

This invention discloses a dual-optical-path whole-eye screening system and imaging method based on transient pulse illumination, belonging to the field of optical imaging and medical device technology. The system includes an illumination module, a beam splitting module, a fundus imaging optical path, an anterior segment imaging optical path, and an intelligent focusing algorithm module. The fundus imaging optical path utilizes a 4f relay lens group and a displacement compensation lens group to achieve retinal imaging; the anterior segment imaging optical path uses the red reflection principle to perform backlight imaging of the lens and anterior segment. The system, in conjunction with transient pulse illumination, under non-mydriatic semi-dark field conditions, utilizes the time difference of the human eye's pupillary constriction response to simultaneously acquire clear fundus and anterior segment images in a single exposure. This invention also proposes a dual-spectrum precise focusing algorithm based on a spatiotemporal hybrid attention mechanism. It extracts spatial features through a residual network and fuses temporal features using a long short-term memory network. Even with unknown individual refractive index distributions, it accurately predicts the optimal focus position for visible light based on near-infrared image sequences, solving the imaging quality problem caused by longitudinal chromatic aberration and reducing screening costs and operational complexity.

The invention provides a single-time multi-frame ultrafast laser imaging device and method based on super-continuum spectrum discretization. Laser pulses generated by a laser device are divided into pump light and probe light through a beam splitter; the detection light passes through the sample after being subjected to time broadening through the continuum spectrum generation module to form super-continuum spectrum pulses carrying dynamic processes of the sample at different moments; the super-continuum spectrum pulse enters a continuum spectrum discretization module and is discretized into a plurality of spatially separated and independent spectrum channels; the CCD imaging module simultaneously collects light intensity information of all spatially separated spectrum channels through single exposure to realize ultrafast continuous imaging; therefore, according to the method, the super-continuum spectrum discretization technology is adopted, the time information is coded in the spectrum dimension, the image is directly obtained through optical discretization, the complex calculation and reconstruction process of technologies such as compressed sensing is avoided, artifacts introduced by an algorithm do not exist, the image fidelity is high, and the time resolution can reach the femtosecond magnitude.