180results about How to "Improve imaging effect" patented technology

The invention belongs to the technical field of fundus imaging, and discloses an ultra-wide-angle ellipsoid confocal laser scanning fundus imaging system, which comprises a light splitting module, a light condensing module, a scanning module, a transmitting mirror group, an ellipsoid reflector and a detection module, wherein the center of the scanning module and the center of the transmitting mirror group are located on the same optical axis A, the pupil of the human eye is located at the first focus of the ellipsoidal reflector, and the entrance pupil of the transmitting mirror group is located at the second focus of the ellipsoidal reflector; and the transmitting lens group comprises a movable focusing lens and is used for changing the position of a first image surface of light reflected by the retina of the human eyes when moving along the optical axis A so as to realize clear imaging of the retina of the human eyes with different diopters. Under the condition that a free-form surface is not introduced, ultra-wide-angle multi-wavelength confocal laser scanning fundus imaging with the single intraocular field angle of 200 degrees is achieved, and the full-field optical resolution reaches 15 micrometers. And by moving the focusing lens, imaging compensation can be carried out on human eyes with diopters of-15D to + 15D.

The invention discloses a differential polarization confocal microscopic imaging system and method of a multi-focus channel, and relates to the technical field of optical microscopy. Comprising a light source emission module, a dichroscope (6), a two-dimensional galvanometer module, a scanning module, a sample acquisition module, a detection module and an imaging terminal (17). According to the invention, differential polarization imaging and a multi-focus channel confocal technology are combined, so that the imaging quality of the confocal microscopic system is further improved on the premise of ensuring the confocal imaging speed; meanwhile, differential imaging is introduced, so that the imaging contrast ratio can be greatly improved, and the confocal microscopic system can obtain a better imaging effect in the application field of thick tissue microscopic imaging.

The invention relates to a medium-wave infrared microscopic imaging lens for an optical transfer function measuring instrument, and relates to the technical field of optical testing. The medium-wave infrared microscopic imaging lens is sequentially provided with a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens along a light path propagation direction, and an aperture diaphragm is arranged on the incident plane of the sixth lens. The medium-wave infrared microscopic imaging lens for the optical transfer function measuring instrument is formed by connecting the infinity objective lens with the infinity tube lens, and the lens is suitable for medium-wave microscopic imaging and excellent in imaging performance; tolerance capacity is loose, and processing and adjustment are easy; the testing efficiency is high, the cost is low, and the practical application value is achieved.

The invention discloses a heating structure used in a scanning electron microscope and a use method of the heating structure, and relates to the technical field of scanning electron microscope high-temperature performance tests.The heating structure comprises a laser, a shell module, a laser clamping module and an electron back scattering diffraction scanning fixing module, and the upper surface of the electron back scattering diffraction scanning fixing module is obliquely arranged; the laser clamping module is installed on the electron back scattering diffraction scanning fixing module, the shell module is installed above the laser clamping module, a heating dodging plate used for placing a sample to be tested is arranged in the shell module, and the laser clamping module is used for clamping a laser lens of a laser. Laser beams output by the laser lens are irradiated on the heating dodging plate, the two ends of the to-be-tested sample extend out of the shell module and are connected with the stretching table, and an observation hole for observing the sample is formed in the upper end of the shell module. According to the invention, the imaging definition of the scanning electron microscope can be improved, and the in-situ high-temperature mechanical property test and the EBSD high-temperature analysis experiment in the scanning electron microscope can be smoothly carried out.

The invention provides an image processing method and device, electronic equipment, a chip and a storage medium, and relates to the field of image processing.The method comprises the steps that a reference image is determined from multiple frames of shot images based on quality scores of the multiple frames of shot images; wherein the multiple frames of shot images are obtained by shooting the same shot object by adopting different shooting view angles; performing shadow correction on the multiple frames of shot images based on shadow areas in the multiple frames of shot images to obtain multiple frames of corrected images; based on the homography matrix of the multiple frames of shot images, aligning the multiple frames of corrected images to the reference image to obtain multiple frames of aligned images; wherein the homography matrix is used for indicating a perspective transformation relation of distortion of the shot image to the first reference image; and performing image synthesis according to the multiple frames of aligned images to obtain a target image. Therefore, the problem of shadow shielding caused by illumination can be eliminated, and the imaging effect is improved. In addition, assistance of depth-of-field information and multi-exposure is not needed, and the complexity of image processing can be reduced.

The invention provides a double telecentric projection objective for focusing and leveling, which is applied to the technical field of semiconductor equipment manufacturing, the double telecentric projection objective comprises an object plane, a front lens group, an aperture diaphragm, a rear lens group and an image plane which are sequentially arranged along an optical axis direction, and the front lens group and the rear lens group are symmetrically arranged along the aperture diaphragm. Therefore, the double-telecentric projection objective lens is of a refraction type and symmetrical object space and image space double-telecentric structure. The double-telecentric projection objective lens adopts a refraction type structure, compared with a reflection type structure, the double-telecentric projection objective lens is beneficial to reducing detection, installation and adjustment difficulty and reducing cost, and the double-telecentric projection objective lens adopts a symmetrical double-telecentric structure and has the advantages of being simple in structure, low in cost and good in imaging performance.

The invention relates to the technical field of medical instruments, and provides a radio frequency gold microneedle control system based on subcutaneous impedance identification, and a radio frequency gold microneedle is provided with an electrode array for impedance tomography. Comprising the following steps: an impedance distribution reconstruction module generates reconstructed impedance distribution from a voltage signal of subcutaneous tissue collected by an electrode array through an impedance distribution reconstruction model based on a genetic algorithm; the impedance imaging module generates an impedance distribution image for reflecting subcutaneous tissue impedance distribution from the reconstructed impedance distribution through an impedance rate segmentation model based on a UNet architecture; the depth control module determines the recommended depth of the radio frequency gold microneedle according to the impedance distribution image; and the radio frequency energy control module adjusts control parameters of a control algorithm for controlling the radio frequency energy of the radio frequency gold microneedle according to the plurality of impedance distribution images. Accurate segmentation judgment and better imaging effect on impedance distribution are achieved, and then impedance imaging is applied to depth and energy pulse control of the radio frequency gold microneedle.

The invention provides an imaging equipment calibration device and method, imaging equipment and electronic equipment, and relates to the field of imaging equipment calibration. The calibration device of the imaging equipment comprises a deviation analysis module and a calibration module, and the deviation analysis module is used for obtaining a deviation value between a current position and an ideal position of a rotating shaft of the imaging equipment according to at least three celestial body images at different spatial positions; and the calibration module is used for calibrating the imaging equipment based on the deviation value. According to the calibration device of the imaging equipment provided by the embodiment of the invention, the autonomy of equipment calibration can be effectively improved, and for the user side, the calibration process is greatly simplified, and the calibration efficiency, accuracy and reliability are improved.

The invention relates to the technical field of sensing equipment synchronous control, and discloses a camera synchronous triggering system and method and computer equipment. The system comprises a vehicle-mounted upper computer which is used for sending a working mode control instruction to a synchronous trigger box; the positioning device is used for sending a first pulse signal corresponding to the position information to the synchronous trigger box; the laser radar is used for sending a second pulse signal corresponding to the distance information to the synchronous trigger box; the synchronous triggering box is used for determining a target execution strategy corresponding to the target working mode according to the working mode control instruction and a pre-stored corresponding relation between the working mode and the execution strategy; the processor is used for determining a trigger signal according to the target execution strategy so as to control the camera to perform exposure; and the camera is used for receiving the trigger signal to realize exposure control. By implementing the technical scheme of the invention, the highly synchronous control of the exposure opportunity of the camera is realized, and exposure at a specific position and specific time is ensured.

The invention discloses an automatic focusing and distortion optimization method based on a large-target-surface industrial lens, relates to the technical field of lens distortion optimization, and aims to accurately identify different distortion types and provide accurate data for subsequent optimization and adjustment by comprehensively analyzing the distortion of the lens from multiple dimensions (radial, tangential and comet distortion). Through calculation of a comet distortion coefficient HJ obtained by calculating a detailed radial distortion coefficient # imgabs0 #, a first tangential distortion coefficient # imgabs1 # on an x axis and a second tangential distortion coefficient # imgabs2 # on a y axis in combination with S44, various distortion conditions (radial, tangential and comet distortion) of the lens can be quantified, and the total distortion rate D is calculated; the distance between the front focusing group A and the rear fixed lens group B of the lens is evaluated and corrected, and the imaging quality of the lens is improved through step-by-step correction (including focal length, distortion, brightness attenuation and the like) in each step from S2-S5.

The invention relates to the technical field of magnetic resonance imaging, and discloses a magnetic resonance four-dimensional dynamic imaging method and device driven by a physical model, and the method comprises the steps: obtaining the magnetic resonance K space data of a to-be-imaged part in a complete motion process; extracting a preset number of three-dimensional static images in the magnetic resonance K space data; analyzing the three-dimensional static image by using the target training model to obtain a dynamic change mode of the three-dimensional static image, and predicting a static image of a future time frame based on the dynamic change mode to obtain a four-dimensional image sequence; and applying physical constraint to the four-dimensional image sequence and correcting data in the K space domain by using a preset physical driving module, and carrying out multiple iterations to obtain a target four-dimensional dynamic imaging sequence. According to the method, high-resolution imaging of the prediction model is utilized, a small number of static images can generate the magnetic resonance four-dimensional dynamic sequence, and the problems that magnetic resonance imaging is limited in providing organ tissue dynamic motion information and complex dynamic motion joint functions and lesion conditions are difficult to comprehensively evaluate are solved.

The long-wave infrared athermalization wide-angle temperature measurement lens comprises a first lens, a second lens, a third lens, a diaphragm STOP, a fourth lens and an optical filter which are sequentially connected along an optical axis from an object side to an image side in an optical path mode. The object-side surface of the first lens is a convex surface, and the image-side surface is a concave surface. The object side surface of the second lens is a convex surface, and the image side surface is a concave surface; the object side surface of the third lens is a concave surface, and the image side surface is a convex surface; the fourth lens element has a convex object-side surface and a convex image-side surface. By adopting the optimized first to fourth lenses, the number of used lenses is reduced, the cost is reduced, the horizontal visual angle is ensured to reach 90 degrees, and the number of apertures is less than or equal to 1.0. In addition, the total optical length is smaller than or equal to 50 mm, the structure is designed to be light, and the purpose of miniaturization is achieved. Meanwhile, the advantages of optical athermalization and active and passive focusing compensation of an electric tuning system are utilized, and high imaging quality is obtained under the complex environment temperature.

The invention discloses an image matting model training method, an image matting method and device, equipment and a medium. The image matting model training method comprises the following steps: acquiring a data set for training; constructing a background probability model formula; marking each pixel point of all the image frames by using the sum obtained by the background probability model formula to obtain a probability thermodynamic diagram of whether the pixel is the background, and obtaining a binary portrait foreground label according to the thermodynamic diagram; using the chrominance component of the data set for training and the binarized portrait foreground label to train a color threshold model of the multivariate nonlinear regression model; brightness and chrominance components of image blocks are randomly acquired in a bbox range, and a nonlinear regression model is trained to represent a calculation model for fitting an edge part of a foreground portrait into an expected fuzzy weight under blue or green backgrounds under different conditions. According to the method, the foreground imaging effect can be optimized during superposition operation, and the computing power of an image matting algorithm is reduced.

The invention belongs to the technical field of pulsed eddy current nondestructive testing, and particularly discloses a ferromagnetic component pulsed eddy current detection imaging method and system, and the detection imaging method comprises the following steps: collecting a pulsed eddy current signal of a ferromagnetic component, carrying out logarithmic processing on the pulsed eddy current signal, and then carrying out secondary filtering processing; carrying out dimension reduction processing on the signal after the secondary filtering processing; calculating an amplitude standard deviation of the signal after dimension reduction processing of each time dimension, and selecting an effective imaging interval based on the amplitude standard deviation; performing Min-Max standardization processing on the data in the effective imaging interval; and calculating a pixel value based on a processing result obtained by Min-Max standardization, and carrying out homogenization processing on the pixel value to obtain a pulsed eddy current image. According to the invention, rapid imaging can be realized aiming at the pulsed eddy current detection signal of the ferromagnetic component, so that defects can be identified and preliminarily positioned.

The invention discloses a quantitative laser speckle blood flow imaging method based on a neuromorphic visual sensor, and relates to the technical field of biomedical engineering. The method solves the problem that static scattered light caused by physiological behaviors and electronic noise of imaging equipment have adverse effects on blood flow imaging quality in a traditional laser speckle contrast imaging method, and comprises the following steps: step 1, using a helium-neon laser as a light source, and irradiating a scattering medium with an expanded laser beam to form a speckle pattern; 2, a microfluidic injector is adopted, two parameters of the inner diameter and the flow of the injector are set, and the flow speed range is controlled; 3, asynchronously sensing the change of the light intensity of the speckle pattern by using an event camera, and shooting the speckle pattern by using a frame camera; and 4, acquiring event stream data by the event camera, and processing the data by using an algorithm. Real-time and high-resolution blood flow imaging and flow velocity calculation are achieved, and the inherent limitation of a traditional method is overcome.

The invention provides an anoxic and endogenous formaldehyde dual-response supramolecular fluorescent probe as well as a preparation method and application thereof, and belongs to the technical field of fluorescent probes. The supramolecular fluorescent probe provided by the invention is composed of azobenzene calixarene and a formaldehyde response fluorescent probe included in the azobenzene calixarene. The supramolecular fluorescent probe provided by the invention can simultaneously respond to oxygen deficit and high endogenous formaldehyde microenvironment characteristics and generate a stronger near-infrared fluorescent signal for analysis and detection, so that false positive signal interference is reduced, high-specificity imaging under tumor microenvironment conditions can be realized, and a new mode is provided for precise imaging of tumors. Compared with the existing fluorescent probe, the supramolecular fluorescent probe provided by the invention combines the detection of two important biomarkers in the tumor generation and development processes, and does not need to introduce a large-volume targeting group into the molecule; the preparation method is simple, the structure is novel, the imaging performance is excellent, and the tumor is accurately subjected to near-infrared fluorescence imaging tracing.

The invention discloses a broadband signal amplitude and phase correction method based on joint error compensation, which is characterized in that waveform nonlinearity caused by a hardware circuit is compensated by using a reference channel technology, amplitude and phase errors are estimated and compensated in a broadband synthesis process by using a joint error compensation method, and finally distortion correction is performed through a frequency domain correction algorithm. Amplitude and phase correction processing of broadband signals is achieved, the imaging resolution is improved, amplitude distortion and phase distortion are reduced, and a clearer and more accurate target image is obtained.

The present application provides a liquid crystal lens, a lens module and a near-eye display device. The first substrate of the liquid crystal lens is arranged opposite to the second substrate, the liquid crystal layer is located between the first substrate and the second substrate, the first electrode is located on the surface of the first substrate facing the liquid crystal layer, and the second electrode is located on the surface of the second substrate facing the liquid crystal layer. The first electrode includes m electrode units, the m electrode units are arranged at intervals from each other, and the optical path difference of the optical path difference distribution curve of the liquid crystal lens corresponding to the width of each electrode unit is greater than zero and less than or equal to λ / n, wherein λ is the wavelength of the incident light, m ​​is a positive integer greater than or equal to 1, and n is a positive integer greater than or equal to 3, which helps to ensure that the liquid crystal lens has good diffraction efficiency. By changing the voltage value of the electrode unit, the tilt angle of the liquid crystal molecules can be adjusted, thereby changing the refractive index distribution of the liquid crystal lens, and realizing the change of the optical focal length of the liquid crystal lens to change the virtual image distance.

The utility model discloses a window-penetrating sighting device, and belongs to the field of sighting devices. The window-penetrating observing and aiming device comprises a shell, a lens group and a laser, the shell is provided with a groove in a first direction; the lens group comprises an objective lens assembly and an eyepiece assembly which are sequentially arranged on the shell along a light path; a groove is formed in the casing, a notch of the groove faces the laser, at least part of the laser is mounted in the groove, the laser comprises a casing and a transmitting device, a plurality of heat dissipation holes are formed in the casing, the casing is mounted outside the casing, and the transmitting device is arranged in the casing. The heat dissipation effect of the laser can be improved, the laser can keep a proper temperature during long-time work, the working stability of the transmitting device is improved, the performance of the transmitting device is prevented from being influenced by overheating, meanwhile, the influence of heat of the laser on the lens group can be reduced, the working stability of the lens group is improved, and the performance of the lens group is prevented from being influenced by overheating; meanwhile, interference of scattered light generated by the laser beams on mirror group imaging can be reduced, and the imaging effect is improved.

The invention discloses a large-image-plane video small lens and a camera, and relates to the technical field of optical lenses, and the large-image-plane video small lens is provided with an object side and an image side which are oppositely arranged along the optical axis direction. The small video camera with the large image plane comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from the object side to the image side. Wherein the first lens, the second lens, the fourth lens, the fifth lens, the seventh lens and the eighth lens are plastic aspherical lenses, and the third lens and the sixth lens are glass aspherical lenses; the resolution ratio of the large-image-plane video small lens is greater than or equal to 12M, the image plane height of the large-image-plane video small lens is phi, and the total optical length of the large-image-plane video small lens is TTL, 1lt; tTL / phi < = 1.5. The technical effects of large imaging surface, good imaging effect and small size are achieved through arrangement and combination of the eight lenses, material selection, surface type distribution and parameter design of the lenses.

The application discloses a kind of wide temperature range stable copper cluster scintillator and its preparation method and application, the scintillator chemical general formula is Cu4X4 (dppyme) 2, by introducing methyl in pyridine ring 6 position structure space constraint, induce to form long-range ordered crystal packing phase, significantly enhance the lattice rigidity.This material has the microcosmic energy level structure of thermal activation delayed fluorescence (TADF) and self-trapped excitor (STE) light emitting mechanism synergism, in-190 ℃ to 150 ℃ extremely wide temperature range, excellent radiation luminescence stability is shown.The application is prepared by room temperature solution method, and process is simple.The flexible film constructed using the material improves the mechanical stability by polymer embedding process, and the spatial resolution reaches 27.8 lp / mm, which is suitable for X-ray detection and imaging in extreme environments such as deep space exploration, polar scientific research and high-temperature industrial detection.

The invention discloses a portable X-ray machine for measuring osteoporosis, and relates to the technical field of medical equipment.The X-ray machine adopts 18-26 V wide-range low-voltage power supply, primary boosting is performed through a full-bridge inverter circuit and a high-voltage transformer, secondary boosting is performed through a single-side CW voltage doubling rectifying circuit, the output voltage ranges from 30 kV to 80 kV, and the tube current ranges from 0.1 mA to 1 mA. A pseudo dual-energy imaging technology is introduced, low-energy and high-energy X-rays are used for imaging respectively, artifacts are reduced through continuous multi-image taking and contrast synthesis, and the imaging quality is improved. And the overexposure risk of the CCD camera is reduced by adopting an accurate dose control and delayed exposure technology. And a glue sealing insulation design and a split type structure are adopted, so that the equipment volume is reduced, and the portability is improved. Through integration of multiple technologies, the portable X-ray machine which is efficient, safe, capable of reducing measurement errors and radiation cost is provided, and the portable X-ray machine is suitable for osteoporosis detection.

The present invention discloses an electromagnetic quantitative imaging method based on target multi-frequency spatial spectrum splicing, the purpose of which is to solve the problem of poor imaging accuracy caused by multi-frequency spatial spectrum aliasing in traditional diffraction tomography methods, realize geometric imaging and physical imaging of the target, and belong to the field of radar imaging. The present invention first performs spatial two-dimensional Fourier transform processing on the backscattered echo signal to obtain a spectrum domain signal, then performs coordinate transformation and interpolation on the spectrum domain signal, and then processes the real part and imaginary part of the spectrum domain signal respectively to obtain a dielectric parameter spectrum domain and a conductivity spectrum domain, and then performs de-aliasing processing on the multi-frequency dielectric parameter spectrum domain and the conductivity spectrum domain to obtain a multi-frequency spliced ​​dielectric parameter spectrum domain and a conductivity spectrum domain of the target, reduce the influence of the aliased spectrum domain on the imaging performance of the target, and finally obtain the geometric imaging and physical imaging of the target body.

This application relates to a marine vortex SAR imaging simulation method, comprising: acquiring marine environmental data of a target marine vortex region; generating a first geostrophic velocity field based on the sea surface dynamic height data, and generating a second geostrophic velocity field based on the three-dimensional temperature data and three-dimensional salinity data; performing a weighted summation of the first and second geostrophic velocity fields according to their respective weight values ​​to generate a composite geostrophic field corresponding to the target marine vortex region; and performing SAR simulation imaging on the target marine vortex region based on the composite geostrophic field to obtain a simulated SAR image of the target marine vortex region. Based on the above method, the problem of unclear details due to resolution limitations in sea surface dynamic height data can be improved; and the characteristics of vortices can be more fully represented, increasing the imaging effect of SAR in marine vortex imaging simulation applications.

This invention provides a cathode-unitized X-ray source, a static CT imaging system, and an image enhancement method, comprising: a vacuum tube; a cathode end for emitting electron beams, the cathode end including an exposure control module and multiple electron emission units arranged in a matrix on the same side of the exposure control module, all electron emission units being independent and electrically connected to the exposure control module; an anode target bombarded by the electron beam, the anode target including an anode body and a target surface formed on the anode body, the target surface being located on the emission path of the electron emission units; when the exposure control module receives an external control signal, it establishes a voltage line between the selected electron emission unit and the exposure control module, the electron emission units emitting electrons one by one or row by row toward the target surface, and the target surface reflecting X-rays to a window under the bombardment of electrons. This invention can increase the scanning range, improve the image quality of static CT, and extend the lifespan of the X-ray source.

This utility model relates to the field of semiconductor manufacturing technology. The technical problems it addresses are large size, large space occupation, low space utilization, high labor costs, and low efficiency. To solve these problems, this utility model provides a system for semiconductor electronic components. The utility model includes: a conveying assembly comprising two conveying tracks, a driving component, and two conveying elements; the two conveying tracks are arranged in parallel; the two conveying elements are symmetrically arranged on the two conveying tracks; the driving component is connected to the two conveying elements; a detection position is located on the conveying assembly; a detection module is located above the detection position; the detection module includes a projector, a camera, and a reflection component; the projector is located to the side of the camera and perpendicular to the electronic component; the camera is perpendicular to the electronic component; the reflection component is located at the bottom of the projector. This utility model reduces size, increases space utilization, lowers labor costs, and improves efficiency.

The invention discloses a stereoscopic microscope for producing and processing an orthokeratology lens, and relates to the technical field of microscopes. The device comprises a base, the top of the base is in threaded connection with a vertical rod, the outer surface of the vertical rod is in sliding connection with a focusing bracket, the inner wall of the focusing bracket is fixedly provided with an observation machine head, the outer surface of the vertical rod is fixedly provided with a dustproof assembly, the dustproof assembly is arranged at the bottom of the observation machine head, and the dustproof assembly carries out dust prevention on an objective lens at the bottom of the observation machine head. According to the stereoscopic microscope, dust is prevented from being attached to the surface of an objective lens when the stereoscopic microscope is not used for a long time, a clamping mechanism is arranged at the top of the base and comprises a shoulder screw, glass slide clamps are rotationally connected to the outer surface of the shoulder screw, a light condensation assembly is arranged at the interval of the two glass slide clamps, and a spring of the shoulder screw drives the glass slide clamps to clamp glass slides. The glass slide is placed above the light condensation assembly, and the light condensation assembly improves the brightness of the bottom of the glass slide, so that the observation effect of the stereoscopic microscope is improved.

The application provides a detection system and a control method thereof, and relates to the technical field of semiconductor detection. The detection system comprises an illumination module and an imaging module arranged in sequence. A product to be detected is arranged between the illumination module and the imaging module. The illumination module and the imaging module respectively comprise a first time sequence diaphragm and a second time sequence diaphragm arranged in rotation. The first time sequence diaphragm is used for obliquely irradiating the product to be detected with illumination light generated by the illumination module. The second time sequence diaphragm is used for filtering or weakening low-frequency diffraction light from the product to be detected and retaining high-frequency diffraction light. The first time sequence diaphragm and the second time sequence diaphragm are synchronously arranged in time sequence, so that the illumination light incident on the product to be detected and the diffraction light from the product to be detected to the imaging module cross at an optical axis. The high-frequency diffraction light is prevented from being shielded while the 0th-order diffraction light is filtered. The final image is formed by fitting different images with reduced 0th-order diffraction light, the imaging effect is improved, the contrast of the system is improved, and high-pass filtering is realized.

The utility model discloses an optical lens group and a vehicle lamp using the same. The optical lens group comprises a first lens, a second lens and a third lens which are sequentially arranged from an object side to an image side along an optical axis direction, the first lens is a glass lens, and the second lens and the third lens are plastic lenses. The image side surface of the first lens, the object side surface and the image side surface of the second lens and the object side surface and the image side surface of the third lens are all of aspheric surface structures; the object side surface of the first lens is a plane and the image side surface is a convex surface; the object side surface of the second lens is a concave surface and the image side surface is a convex surface; the third lens element has a concave object-side surface and a convex image-side surface. The optical lens group provided by the utility model is beneficial to miniaturization and light weight of a lamp, the production cost is reduced, better image definition and details can be obtained, and the imaging quality is high.

The invention belongs to the field of core analysis, and discloses a high-temperature and high-pressure model pore network characterization system which comprises an analysis rack and an analysis model, the analysis model comprises a model main body, an execution assembly and a main body lower pressing cap, and an upper pressing plate and a lower top plate are arranged at the upper end and the lower end of the model main body respectively; a hanging basket for placing a detection sample is arranged at the bottom end of the upper pressing plate, and a Wood alloy block is arranged at the upper end of the lower top plate. Through mutual cooperation of the model main body, the upper pressing plate, the lower top plate, the upper execution assembly, the lower execution assembly and other parts, a rock core analysis experiment is realized in a molten alloy mode, and the upper execution assembly and the lower execution assembly pressurize the rock core analysis experiment in an oil pressure mode. In this way, the alloy has higher contrast contrast with the matrix particles, the imaging effect is better, and the problem that in a traditional method, fine depiction of the pore structure in the whole pore diameter range is difficult to achieve is effectively solved.