41results about How to "Improve distortion" patented technology

The invention relates to the technical field of thrust bearings, in particular to a preparation method of a tin-based babbitt metal bushing and the tin-based babbitt metal bushing. The preparation method of the tin-based babbitt metal bushing comprises the following steps that a transition layer containing tin is arranged on the surface of a thrust pad, plate-strip-shaped tin-based babbitt metal is arranged on the transition layer, pressure and ultrasonic waves are applied to the surface of the plate-strip-shaped tin-based babbitt metal, and welding is completed through ultrasonic pressure welding. According to the method, the tin-containing transition layer is arranged on the surface of the thrust pad, the thrust pad bushing is rapidly prepared through ultrasonic pressure welding, and element diffusion and hydrogen element escape among the bushing, the transition layer and the steel backing and atomic lattice distortion and electron movement between the babbitt metal bushing and the transition layer are promoted through the coupling effect of extrusion force and high-frequency vibration; the plate-strip-shaped tin-based babbitt metal is welded to the surface of the thrust pad to form the bushing, the prepared babbitt metal bushing coating is uniform and compact, the preparation technology is greatly simplified, and environment friendliness is achieved.

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 a super-surface-based flat plate type super-integrated miniature spectral imaging system, which comprises a gold reflecting layer and a flat plate substrate reflecting layer integrated with a dispersion super-surface, a first focusing reflection super-surface, a second focusing reflection super-surface and a focusing transmission super-surface, incident light is split by the dispersion metasurface, then is reflected to the gold reflection layer, and then is sequentially focused by the two reflection metasurfaces and the transmission metasurface to be imaged on an image plane. The dispersion metasurface adopts a periodically arranged square nano-column diffraction grating structure and has stronger dispersion capability, and the other three metasurface elements are obtained by adopting phase optimization design, so that the imaging performance is excellent; the four metasurfaces are integrated on the same reflecting layer, system optics is only composed of two flat reflecting layers, wavefront regulation and control are achieved while light in a reflecting cavity is continuously reflected, the metasurface can be manufactured through the single photoetching technology, the structure is simple and compact, machining, assembling and adjusting are easy, and a new product is provided for a high-performance compact imaging spectrometer.

The invention discloses an uncertainty perception single-image super-resolution network model based on self-convolution attention. The model comprises a shallow feature extraction module SFE, a deep feature extraction module DFE and an image reconstruction module IR. The shallow feature extraction module SFE performs shallow feature extraction on an input low-resolution image through a convolutional layer to generate an initial feature F0: the deep feature extraction module DFE comprises a plurality of residual attention groups RAG, and each residual attention group RAG is composed of a plurality of cross-resolution mixed attention blocks CRHAB; the deep feature extraction module DFE is used for extracting a deep feature FDF from the initial feature F0, and the image reconstruction module IR is used for up-sampling the deep feature FDF and combining the deep feature FDF with the initial feature F0 to generate a final super-resolution output image ISRS.

The present invention relates to the field of optical imaging technology, and discloses a microscope phase contrast objective lens, comprising a first lens group with positive refractive power, a second lens group with positive refractive power, an object plane and a cover glass, wherein the first lens group is located below the second lens group, and the absolute value of the refractive power of the first lens group is greater than the absolute value of the refractive power of the second lens group. The present invention is arranged by setting the first lens group and the second lens group in the phase contrast objective optical system, and by limiting the focal length, refractive index, Abbe number and thickness of the first lens group and the second lens group, so that the field curvature, distortion and aberration sensitivity of the phase contrast objective optical system are further improved, thereby ensuring the optical performance of the phase contrast objective optical system, so that the objective optical system has the characteristics of small magnification, large numerical aperture, high resolution performance, small chromatic aberration under a large field of view, small number of lenses, and short total length of the objective optical system.

This invention discloses an intelligent exercise assessment and early warning system based on multi-source biosignal fusion, belonging to the field of exercise risk early warning technology. It collects multi-source data, including electromyography (EMG), heart rate, blood oxygen, skin conductance, and acceleration, from various wearable sensors to assess muscle fatigue, cardiovascular load, exercise status, and environmental factors. After preprocessing, the system uses quantitative models such as the muscle fatigue correction index and the cardiovascular load dynamic coefficient to calculate a comprehensive exercise risk early warning index by integrating physiological state and environmental factors. This results in a normalized risk classification, corresponding to low, medium, and high risk levels and marked with different color icons. This system overcomes the limitations of single signals, considering the synergistic effects of multi-dimensional physiological indicators and the influence of environmental factors, improving the accuracy of assessment in complex scenarios. It can effectively intervene before risks develop and is suitable for scenarios such as mass fitness and professional training. It is integrated into lightweight wearable devices without interfering with the exercise process.

The invention discloses a flexible methanol fuel cell and a humanoid robot power supply system, and relates to the technical field of methanol power generation, the flexible methanol fuel cell comprises a flexible bag body, the two ends of the flexible bag body are provided with a liquid inlet and a liquid outlet, and the side surface is provided with a mounting opening; the membrane electrode is sealed in the mounting opening; the anode diffusion layer and the cathode diffusion layer are respectively fixed on the anode side and the cathode side of the membrane electrode, and fine wire meshes are fixed on the anode diffusion layer and the cathode diffusion layer. A humanoid robot power supply system comprises a flexible methanol fuel cell, a DMFC energy management system and an energy storage cell, and the flexible methanol fuel cell serves as a power generation unit and is integrally distributed on the outer surface of a robot. According to the flexible methanol fuel cell disclosed by the invention, the whole cell body has good bending, twisting and tensile elasticity, can adapt to various irregular surfaces and dynamic deformation scenes, and is light in weight and thin in thickness. The flexible methanol fuel cell is used as a power generation skin to be integrated on the robot, the mass energy density is improved, and the endurance working time is prolonged.

The utility model relates to the technical field of spring machining, in particular to a spring machining steel wire twisting mechanism which comprises a bearing table and a vertical plate, a twisting mechanism is installed on the plate wall of the vertical plate, and the twisting mechanism is formed by combining a motor, a sleeve, a threaded rod, an arc clamping plate, a twisting rod, a fixing frame, an electric hydraulic rod, an extrusion block and a limiting block. A motor is installed on the plate wall of the vertical plate through bolts, a sleeve is installed at the output end of the motor, a set of symmetrical threaded rods are in threaded connection with the sleeve wall of the sleeve, one end of each threaded rod is connected with an arc clamping plate through a bearing, and a twisting rod is connected to the inner wall of the sleeve in an inserted mode. And a fixing frame is welded to the sleeve wall of the sleeve, so that after the twisting rod is located between the arc clamping plates, a worker rotates the threaded rod, the threaded rod pushes the arc clamping plates to clamp and fix the twisting rod, and therefore the springs with different diameters can be twisted conveniently.

The invention relates to the technical field of ultrasonic emission, and particularly provides an arbitrary waveform ultrasonic generation method for demodulating a pulse width modulation signal by using frequency response characteristics of a transducer. The method comprises the following steps: acquiring frequency response characteristic data of a target ultrasonic transducer; calculating a modulation function for modulating the duty ratio of the pulse width modulation signal; generating a high-voltage pulse width modulation signal sequence; directly driving the target ultrasonic transducer by the high-voltage pulse width modulation signal sequence, and filtering and demodulating the high-voltage pulse width modulation signal sequence by using the frequency response characteristic of a mechanical vibration system of the target ultrasonic transducer as a natural low-pass filter, and generating an ultrasonic wave corresponding to the target ultrasonic waveform. According to the invention, the fundamental simplification of the system structure is realized, high-fidelity arbitrary waveform ultrasonic output is obtained on the basis of keeping high-efficiency switch driving, and the system has excellent waveform flexibility and adaptive capacity to transducer characteristics.

An optical system disclosed in an embodiment of the present invention includes first to eighth lenses disposed along an optical axis in a direction from an object side to a sensor side, wherein: the first lens has a positive (+) refractive power on the optical axis and has a meniscus shape protruding toward the object side; an eighth lens having negative (-) refractive power on the optical axis and having a meniscus shape protruding toward the object side; an object-side surface of the seventh lens has a critical point; a sensor-side surface of the third lens has a critical point, and a sensor-side surface of the eighth lens has a critical point, and when an effective diameter of a sensor-side surface of the third lens is CAL3S2, an effective diameter of an object-side surface of the fourth lens is CAL4S1, a maximum thickness among center thicknesses of the first to eighth lenses is CTMax, a maximum gap among gaps between the first to eighth lenses is CGMax, and the effective diameter of the sensor-side surface of the third lens is CAL3S2. The following mathematical relationship is satisfied: 0.5 lt; cAL3S2 / CAL4S1lt, and CAL4S1lt; 1.5 and 0 lt; cTMaxt / CGMaxt, and CTMaxt / 1.

The invention relates to the technical field of electric field processing and freezing preservation, and discloses an electric field generator for improving the uniformity of a space electric field and an aquatic product freezing method.The electric field generator for improving the uniformity of the space electric field comprises an electric field generating structure which defines at least one working plane, a working area is formed between the two groups of electric field generating structures; the functional structures are symmetrically arranged on one of the electric field generating structures, and each functional structure is provided with a circuitous part which extends towards the working area; according to the electric field generator, by introducing a flat-curved composite structure design into the discharge plate, potential distribution is optimized, the uniformity of a space direct-current electric field is remarkably improved, the fringe electric field concentration effect is reduced, the electric field generator can form a stable and uniform potential field in the electric field auxiliary freezing process, uniform nucleation is promoted, ice crystals are refined, protein structure denaturation is reduced, and the freezing efficiency is improved. Therefore, the quality of frozen samples is improved.

An optical system disclosed in an embodiment of the present invention may include first to eighth lenses disposed along an optical axis from an object side to a sensor side, in which an object-side surface of the first lens is convex, and at least one of an object-side surface and a sensor-side surface of the seventh lens has at least one critical point, at least one of an object-side surface and a sensor-side surface of the eighth lens has a free-form surface shape in which lens surfaces in a first direction and a second direction orthogonal to each other with respect to the optical axis are asymmetrical, and in a free-form surface, lens surfaces in the first direction and the second direction are asymmetrical. The opposing lens surface has a symmetrical shape in a first direction with respect to the optical axis, and the opposing lens surface has a symmetrical shape in a second direction with respect to the optical axis.

The utility model relates to the technical field of near-to-eye display, and discloses an optical module and a head-mounted display device, the optical module is composed of a first optical element and a second optical element; the first side surface of the first optical element faces human eyes; the first side surface of the second optical element faces the second side surface of the first optical element, and the second side surface of the second optical element faces the display screen; the optical module satisfies the following conditions: 0 < = sin (theta1) / sin (theta2) < = 7; wherein theta1 is the maximum field-of-view principal ray incident angle of the first optical element, and theta2 is the maximum field-of-view principal ray emergent angle of the second optical element. According to the head-mounted display device, the refraction angle of the light between the lenses can be limited in a proper range while the size of the optical module is miniaturized, the imaging quality and the size of the optical module are well balanced, and the user experience is effectively improved while the miniaturization design requirement of the head-mounted display device is met.

This invention discloses a method for suppressing current imbalance and power oscillations based on a virtual synchronous generator (VSG). First, a traditional VSG loop model is established and its parameters are tuned. Then, the positive and negative sequence components of the grid-connected voltage, filter capacitor terminal voltage, and grid-connected current are extracted using a time-delay cancellation method and transformed to a synchronous rotating coordinate system. An equivalent VSG grid-connected loop model is added to the traditional VSG model. The traditional active power and extended reactive power calculation methods are transformed to the synchronous rotating coordinate system, and a reference value for the grid-connected current that suppresses the second harmonic component of the power is derived. A PI controller is used to make the actual grid-connected current track the reference value, and the output modulated wave drives the inverter. This invention can simultaneously suppress the second harmonic oscillations of active and reactive power, improve grid-connected current imbalance and distortion problems, while retaining the active power frequency regulation, reactive power voltage regulation, and inertial support characteristics of the VSG, thus improving the stability and power quality of the new energy grid-connected system.

The invention provides austenitic stainless steel as well as a preparation method and application thereof, and relates to the field of high-temperature-resistant austenitic stainless steel. The austenitic stainless steel comprises the following chemical components in percentage by weight: less than or equal to 0.10% of C, less than or equal to 0.12% of N, less than or equal to 2.0% of Si, 1.0-2.0% of Mn, 16.0-18.0% of Cr, 10.0-14.0% of Ni, 2.0-3.0% of Mo, 0.05-0.10% of Nb, 0.05-0.10% of Ti, less than or equal to 0.02% of S, 0.04-0.06% of P and the balance of Fe and inevitable residual elements. The content of P in the stainless steel is increased, the diffusion rate of solute atoms such as Cr and Mo can be reduced through interaction of P and vacancies at the high temperature, nucleation of M23C6 carbides and the like at the grain boundary is inhibited, the precipitation number is remarkably reduced, meanwhile, P is discharged outwards in the coarsening process of the M23C6 carbides, a core-shell result that the M23C6 carbides are wrapped by the P element is formed, the coarsening rate of the M23C6 carbides is reduced, and the corrosion resistance of the stainless steel is improved. Furthermore, a creep cavity caused by a precipitated phase in the creep process is inhibited, and the creep fracture strength is improved.

The invention relates to the technical field of alloy coatings, in particular to an in-situ TiC reinforced AlCoCrFeNiMo high-entropy alloy laser cladding coating and a preparation method thereof.The preparation method comprises the steps that S1, mixed metal powder, Ti powder, graphite powder and modified powder are added into a ball milling tank and subjected to ball milling under argon protection; s2, the surface of the base material is polished with abrasive paper, an interface bonding modifier is sprayed after ultrasonic cleaning, and a pretreated base material is obtained; and S3, cladding a coating on the surface of the base material by using DML2000 laser cladding equipment, and cooling to room temperature along with the furnace after cladding is completed. According to the method, through the in-situ reaction of Ti and C in the laser cladding process, a TiC reinforced phase is generated in an AlCoCrFeNiMo high-entropy alloy matrix, the problems of uneven distribution, poor interface bonding and the like caused by direct addition of TiC are avoided, and the bonding strength of the reinforced phase and the matrix is improved. And due to introduction of TiC, crystal grains are refined, lattice distortion is increased, and therefore the comprehensive performance of the coating is improved.

This invention proposes a gallium nitride-based semiconductor laser, comprising, from bottom to top, a substrate, a lower confinement layer, a lower waveguide layer, an active layer, an upper waveguide layer, and an upper confinement layer. This invention incorporates a multi-layered, multi-vacancy electron-phonon modulation layer within the semiconductor laser element, defining the electron affinity distribution and polarization optical phonon energy distribution characteristics of each multi-vacancy electron-phonon modulation layer. This forms single-vacancy, vacancy cluster, and multi-vacancy modulated electron-phonon structures, localizing electron-phonons between the lower confinement layer and the lower waveguide layer. This reduces the Stokes shift caused by the photon energy difference between the pump light and the oscillating light, reduces heat loss from phonon vibration and phonon transport, improves the heat dissipation of the laser element, mitigates interlayer thermal mismatch, suppresses the thermal lensing effect and stress birefringence effect of the laser, improves laser beam distortion and depolarization, and enhances the laser beam quality factor.

The invention provides an automatic forming production line for air valve blades, and belongs to the technical field of air pipe machining equipment. Comprising an unwinding frame, a leveling frame and a conveying roller frame which are sequentially arranged together, and a forming machine is arranged on one side of the conveying roller frame; a material guide mechanism, a leveling mechanism, a punching mechanism and a cutting mechanism are sequentially arranged on the leveling frame, and a plurality of groups of leveling rollers and a first servo motor for driving the leveling rollers to rotate are arranged on the leveling mechanism; a plurality of conveying rollers arranged in parallel are arranged at the top of the conveying roller frame, and a second servo motor capable of driving the conveying rollers to rotate synchronously is further fixed to the conveying roller frame; the production line further comprises two feeding mechanisms, one feeding mechanism is located in the conveying roller frame, the other feeding mechanism is located in the forming machine, and the two feeding mechanisms are matched to clamp the galvanized sheet and translate in the axis direction of the conveying rollers. The device has the advantages of labor saving, good product consistency, good smoothness and the like.

A multi-format compatible space laser communication receiving device and method belongs to the field of free space optical communication technology. In order to solve the problem of high complexity and high maintenance cost of the existing system, and facing the problem of poor applicability of dynamic channel characteristics in the space laser communication system, the signal source of the device is connected to the IQ modulator through a radio frequency line, the C-band tunable laser is connected to the IQ modulator through an optical fiber, the IQ modulator is connected to the power amplifier, the power amplifier is connected to the transmitting antenna through an optical fiber, the transmitting antenna and the receiving antenna are wirelessly transmitted, the receiving antenna is connected to the optical fiber coupler through an optical fiber, the optical fiber coupler is respectively connected to the preamplifier and the optical power module through an optical fiber, the preamplifier, the photodetector, and the analog-to-digital converter are connected in turn through optical fibers, the analog-to-digital converter and the FPGA are connected with an radio frequency line, and the optical power module and the temperature pulsator are respectively connected to the FPGA through a USB data line. While meeting the requirements of multi-format compatible reception and high speed, the requirements for system hardware are reduced, the cost is low and the reliability is high.

The invention belongs to the technical field of nanocrystalline hard alloy, and discloses tungsten carbide-based nanocrystalline hard alloy and a preparation method thereof. The preparation method comprises the following steps that tungsten carbide powder is put into a modified solution containing soluble cobalt salt and soluble lanthanide series metal salt to be soaked, solid matter is collected, washed and dried after soaking is completed, and first powder is obtained; calcining the first powder in a reducing atmosphere to obtain second powder; and mixing the second powder, high-entropy metal carbide powder or high-entropy metal carbonitride powder and boron carbide powder, and then forming and sintering to obtain the tungsten carbide-based nanocrystalline hard alloy. The comprehensive effect of lanthanide series metal, high-entropy metal carbide powder or high-entropy metal carbonitride powder and boron carbide is utilized, and a novel introduction mode is adopted, so that the granularity of tungsten carbide is effectively inhibited, the nanocrystalline hard alloy with excellent hardness, obdurability and high temperature resistance is successfully prepared, and the practicability is very high.

The present invention relates to a mid-infrared holmium, praseodymium, calcium, magnesium, zirconium co-doped gadolinium, gallium, garnet laser crystal and a preparation method and application thereof, belonging to the technical field of single crystal or uniform polycrystalline materials with a certain structure. The mid-infrared holmium, praseodymium, calcium, magnesium, zirconium co-doped gadolinium, gallium, garnet laser crystal of the present invention comprises a matrix crystal, activation ions, deactivation ions and auxiliary ions; the matrix crystal is a gadolinium, gallium, garnet crystal, the activation ions are Ho 3+ , the deactivating ion is Pr 3+ , the auxiliary ions include at least Ca 2+ Mg 2+ and Zr 4+ ; the Pr 3+ The doping concentration is ≥0.05at%. The mid-infrared holmium, praseodymium, calcium, magnesium, zirconium co-doped gadolinium, gallium, garnet laser crystal has a low laser threshold, high laser output power and efficiency.

The application discloses a double closed loop discrete vector control method for a PWM rectifier, which comprises the following steps: obtaining an I 2 / U 2 model covering the relationship between the voltage and current of the AC and DC sides based on the mathematical model of the PWM rectifier; obtaining the given value of the active power in the kth period and the given value of the current vector of the current inner loop by means of equivalent transformation; obtaining the predicted value of the current vector in the k+2th period by means of Laplace inverse transformation; obtaining the control voltage vector based on the given value of the current vector of the current inner loop and the predicted value of the current vector, converting the control voltage vector modulation into the PWM control signal of the inverter device, and supplying the inverter device at the k+1th moment to follow the given current vector to implement current control. Thus, the lag caused by the integrator is eliminated, the robustness and dynamic performance of the system are enhanced, the inner loop current vector prediction control is effectively optimized, the grid-side current impact is reduced, and the grid-side current distortion caused by the grid-side voltage imbalance is improved.

The invention provides a high-precision large-field-of-view collimator. An optical system of the high-precision large-view-field collimator is sequentially provided with a first plano-convex lens, a first biconcave lens, a first meniscus lens, a first biconvex lens, a second biconvex lens, a second meniscus lens, a third meniscus lens, a reticle, an acrylic plate and a uniform area array light source in the direction from human eyes to a light source. The optical elements of the optical system all adopt CDGM conventional large-caliber glass, so that a melting process with low conversion rate is avoided during glass processing, and the cost is effectively reduced. The full-field angle of the optical system is 63 degrees, the maximum distortion is smaller than 0.11%, the optical system is matched with an existing optical glass material to correct chromatic aberration in the visible light range, the scribing precision of a collimator reticle is lower than 2 ', and the use requirements of high-precision and large-field products can be met.

The invention discloses a 3D deep learning defect detection method based on machine vision, and relates to the technical field of visual detection, and the method comprises the following steps: S1, building a learning network: collecting and sorting an image data set, guaranteeing the diversity and representativeness of data, and obtaining the learning network; inputting the collected and sorted image data set for training, then testing the deep learning model architecture, then testing the deep learning model architecture after training, extracting features in the image data set and storing data, performing model training after extraction and storage, and testing the model after training to obtain a deep learning model architecture; after the test is completed, learning network construction can be completed; and S2, image acquisition: carrying out comprehensive scanning on the surface of the product by using a high-resolution 3D camera to obtain three-dimensional image data of the product, so that deep learning can be carried out during detection, manual importing is not needed, and the detection efficiency is improved.

The invention discloses a manganese-based polyanionic positive electrode material as well as a preparation method and application thereof, and belongs to the technical field of sodium-ion battery positive electrode materials. The chemical formula of the positive electrode material is NaxLiyMnV0. 5Ti0. 5 (PO4) 3, x is greater than or equal to 3 and less than or equal to 3.5, y is greater than or equal to 0 and less than or equal to 0.5, and x + y is equal to 3.5. As lithium ions are introduced, electron orbital overlap between alkaline metal ions and oxygen atoms is weakened, so that the oxygen atoms and surrounding Mn < 2 + > generate a stronger coordination effect, and the lithium ion battery can be used as a lithium ion battery. The enhanced Mn-O bond inhibits Jahn-Teller distortion caused by Mn < 3 + > (Mn < 2 + > is obtained by oxidizing at high potential) in the charging and discharging process; according to the manganese-based polyanionic positive electrode material, the cycling stability and the rate capability of the material can be remarkably improved while the sodium storage specific capacity is ensured, and the sodium storage electrochemical performance of the manganese-based polyanionic positive electrode material is obviously superior to that of a lithium-free pure-phase material.

The utility model provides a camera module of brush palm recognition equipment, and belongs to the technical field of optics. The brush palm identification equipment camera module comprises a lens module and an image sensor. The lens module mainly comprises a first lens assembly and a second lens assembly, the first lens assembly comprises a plastic lens and / or a spherical glass lens, and the second lens assembly comprises a free-form surface lens and / or a molded glass lens. The first lens assembly, the second lens and the image sensor are fixed in the lens barrel, and the image sensor is located on the image side of the first lens assembly and the second lens. The free-form surface lens and the molded glass lens can enlarge the field of view of the lens module, so that when the palm is close to the lens module or slightly deviates from the lens module, the lens module can obtain a complete palm image. Meanwhile, the free-form surface lens and the molded glass lens can improve the distortion of the lens module and improve the definition, thereby facilitating the acquisition of a clear palm image. Therefore, the user identity can be quickly and accurately identified.

The present invention proposes an optical objective lens group and a capsule endoscope. The optical objective lens group comprises a first lens, a second lens, an aperture, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side, wherein the optical focal lengths of the first lens to the sixth lens are negative, positive, positive, negative, positive and positive respectively; and the optical objective lens group satisfies the following relationship: ‑1.7≤f1 / F≤‑1.6; 0.95≤T1 / F≤1.15; 1.1≤V1 / V6≤1.2; the optical objective lens group of the present invention reasonably controls the shape, optical focal length and related parameter relationship of the lenses, so that the optical objective lens group can well correct chromatic aberration, astigmatism, coma, field curvature and distortion, so that the optical objective lens group has the advantages of miniaturization, large field of view and high imaging quality, so that it is convenient to be applied in micro devices.

The application provides a photoelectric detection circuit and a display device. The photoelectric detection circuit is provided with an auxiliary light sensing transistor in the same light environment condition as a main light sensing transistor. The threshold voltage of the auxiliary light sensing transistor is captured and compensated to the gate of the main light sensing transistor through a first threshold capturing compensation unit. Thus, the influence of the threshold voltage offset of the main light sensing transistor on the photoelectric signal generated by the main light sensing transistor is reduced, the photoelectric signal output by the main light sensing transistor due to characteristic drift is improved, and the detection precision of the photoelectric detection circuit is improved.

The curved-swept blade design method comprises the following steps that a blade in the area above the gravity center of a blade tenon rotates around the axis of an engine, the blade in the area from the gravity center of the tenon to 30% of the blade height position rotates around the axis of the engine to the blade back direction, and the blade in the area above the gravity center of the tenon to the blade back direction; and an included angle is formed between the element-level gravity center of the runner hub and the connecting line of the axis of the engine and the gravity center of the blade tenon. The invention further provides a swept-curved blade. According to the method and the swept-curved blade, smooth transition between the root end area and the middle upper part of the blade can be achieved, the problem of stress concentration is avoided, and smooth transition from the end area in the blade runner to the tenon is achieved.

The present invention relates to the field of optical technology, and specifically to an immersion microscope objective lens, wherein a cover glass is arranged on one side of the object surface, and a first lens group, a second lens group and a third lens group are arranged in sequence on one side of the cover glass, and a liquid is arranged between the cover glass and the first lens group. The present invention arranges the first lens group, the second lens group and the third lens group in the immersion microscope objective lens optical system, wherein the first lens group has positive refractive power, the second lens group has positive refractive power, and the third lens group has negative refractive power, so that the entire immersion microscope objective lens optical system has good optical performance, and by limiting the focal distance, refractive index, Abbe number and thickness of the first lens group and the second lens group, the field curvature, distortion and aberration sensitivity of the objective lens optical system are further improved, thereby ensuring the optical performance of the immersion microscope objective lens optical system.