17results about How to "Fast focusing" patented technology

The present invention relates to a hub type automatic focusing lens, comprising a main mirror seat, an upper cover, a hub assembly, a motor assembly, a field of view positioning assembly and a limit switch, wherein the hub assembly and the motor assembly are both arranged in the main mirror seat, the upper cover is fixedly connected to one side of the main mirror seat, the limit switch is fixedly connected to the inner side of the upper cover, the motor assembly drives the hub assembly to rotate to 0° or 90°, the hub assembly is also provided with a trigger device for colliding and triggering the limit switch to stop the motor assembly, and the field of view positioning assembly is arranged on one side of the main mirror seat and is used to lock the hub assembly when it rotates to 0° or 90°. Beneficial effects: fast focusing speed and good optical axis consistency. The manufacturing and installation process requirements are relatively low, meeting the requirements of mass production. The azimuth direction is changed only by interactive transformation between the two positions of 0° and 90°, and the switching speed is extremely fast, meeting the requirements of fastness and maneuverability.

The liquid focusing lens comprises a first lens group, a second lens group and a third lens group which are sequentially arranged from the object side to the image side, the second lens group comprises a liquid lens, the focal length of the liquid lens is changed by changing the curvature of the liquid surface, and finally the purpose of focusing is achieved. The liquid focusing lens disclosed by the invention has the advantages of being high in focusing speed, high in efficiency, high in precision, high in resolving power, capable of meeting the requirement for miniaturization use of equipment and the like while meeting the requirement for small size, the liquid lens can be replaced, liquid lenses produced by different manufacturers in the market can be used, and the liquid focusing lens is more universal; the liquid focusing lens is wide in applicable object distance range and can be used for different object distances, and the object distance range is 80 mm to infinity.

The invention relates to exposure equipment, which comprises a target light projection module, a to-be-exposed workpiece, a focusing light processing module and a focusing module, and is characterized in that the target light projection module is used for forming a target focusing light beam and a target exposure light beam on the to-be-exposed workpiece; the focusing module comprises a one-dimensional second linear image sensor for receiving the first target projection beam to form a first focusing pattern and for receiving the second target projection beam to form a second focusing pattern; the target projection light beam is obtained by processing a target focusing light beam reflected by the to-be-exposed workpiece based on the focusing module, and the focus position of the target focusing light beam on the to-be-exposed workpiece is determined based on the light and shade contrast of the first focusing pattern and the second focusing pattern. The to-be-exposed workpiece is subjected to exposure processing at the focus position based on the target exposure light beam. The one-dimensional linear image sensor only needs to process one-dimensional data, and the algorithm and the processing process are relatively simple, so that the overall focusing speed of the exposure equipment is improved.

The invention relates to an active and passive combined microscope automatic focusing method. The method comprises the following steps: S1, carrying out automatic focusing; s2, acquiring the working distance of the microscope and the coded value data of the zoom motor; s3, calculating to obtain a theoretical coding value of the zoom motor; s4, the zoom motor is driven to rapidly reach the position close to the theoretical coding value, then the speed of the zoom motor is reduced, scanning is conducted in a small range, and meanwhile the FV value is calculated; s5, judging whether the maximum value of the FV is found or not, and if not, returning to S4; and if yes, completing focusing. According to the invention, an active and passive combined microscope automatic focusing method is adopted, the focusing position can be reduced through active focusing, then accurate focusing is realized through passive focusing, the focusing speed is high, and the precision is higher.

A method for detecting the welding quality of LED chips of an LED display screen comprises a camera, a moving mechanism, and a control module. The control module forms a plurality of offset graphs by performing multiple offsets on the image, and then adds the sharpness obtained by subtracting the fourth offset graph from the remaining seven offset graphs and the entire image, and performs an absolute value operation to obtain the clarity of the image at the height. Then the moving mechanism moves the camera to find the clearest part of the image according to the change rule, and the control module obtains the final image at the clearest part and determines whether the quality of the solder joint is qualified. Compared with locking a single point and subtracting it from the surrounding points, the whole image is subtracted, and the calculation efficiency is faster, thereby improving the focusing speed, so as to speed up the detection speed of the quality of the LED chip solder joint. In addition, each point in the image is calculated, which not only ensures the high calculation efficiency, but also ensures the accuracy of the data.

This invention discloses a microscopic imaging focusing method and an automatic focusing device, belonging to the field of microscopic optical imaging technology. The microscopic imaging focusing method sequentially includes: preparation, coarse focusing, and fine focusing; the preparation includes calibrating the relationship between the image sharpness of chip markers and the driving current of the liquid lens. This invention is applied to the imaging focusing of complex biological samples containing a large number of impurities, solving the technical problem that existing automatic focusing methods cannot achieve fully automatic, high-speed focusing on complex biological samples within microfluidic chips, enabling fully automatic and rapid focusing for highly complex biological samples.

The invention relates to an industrial camera automatic focusing method and device based on machine vision, and the method comprises the steps: 1) carrying out a focusing experiment, collecting a focusing value and corresponding position data of each experiment to obtain a plurality of training models, clustering the training models corresponding to the positive focal values, and setting the clustered training models as prediction models; 2) controlling a motor to drive an industrial camera, collecting multiple frames of images, generating relation data of a focusing value and a position to form a sample function, and calculating related characteristics; 3) substituting the generated focusing value into the training model, comparing the related characteristics of the sample function and the training function, and generating position data corresponding to the last frame by using the closest training function; and 4) combining the position data corresponding to the last frame, the prediction model and the system hardware parameters, calculating the working time of the motor, and driving the industrial camera to complete automatic focusing. Compared with the prior art, the phenomenon of local focusing maximum value caused by environmental factors can be effectively overcome, and rapid and accurate automatic focusing can be realized at any position in an effective stroke.

The present invention relates to a focusing method and device for a high-definition scanner, a high-definition scanner and a storage medium. According to a first distance between a measured object and the high-definition scanner and equipment information of the high-definition scanner, a first focusing position range of the high-definition scanner is obtained, the focusing position of the high-definition scanner is adjusted within the first focusing position range, and the focusing position of the high-definition scanner is adjusted according to the focusing position corresponding to a captured image with the highest definition. The high-definition scanner can achieve accurate focusing without completing a focusing stroke, thereby improving the focusing speed of the high-definition scanner and user experience.

The utility model discloses a lens assembly, a lens and an image pickup device. The lens assembly comprises a skeleton, a focusing group and a driving mechanism. The focusing group comprises a lens group frame, and a focusing lens and an elastic clamping piece which are arranged on the lens group frame; the lens group frame is arranged in the skeleton in a sliding manner along the axial direction of the optical system; the driving mechanism comprises an installation support, a piezoelectric actuator and a friction rod, the piezoelectric actuator and the friction rod are arranged on the installation support, the installation support is arranged on the side wall of the framework, the piezoelectric actuator and the friction rod are adhered in the axial direction of the optical system, and the friction rod is clamped on the elastic clamping piece. According to the technical scheme, the piezoelectric actuator is adopted as a power source, the focusing set is driven to move in the framework in the axial direction of the optical system based on the piezoelectric stick-slip driving principle to achieve the focusing purpose, the design size of the driving mechanism can be effectively reduced, the size of the lens is further reduced, and the focusing speed of the lens is increased.

The present invention relates to a thin-film variable-focus lens based on a threaded linear ultrasonic motor. Aiming at the zoom system currently used for optical focusing, the present invention innovatively proposes to use an ultrasonic motor as a driving device for the optical lens. This structure greatly reduces the number of parts and the system volume, and the structure is more compact. At the same time, the overall focusing system can obtain a higher focusing speed and avoid the electromagnetic interference of traditional electromagnetic motors.

The utility model belongs to the field of microscopes, and particularly relates to an automatic focusing judgment device of a microscope, which comprises an automatic focusing body, an upper connecting cylinder is fixedly mounted at the center of the top of the automatic focusing body, a camera is fixedly mounted at the top of the upper connecting cylinder, and a lower connecting cylinder is fixedly mounted at the center of the bottom of the automatic focusing body. An objective lens is fixedly mounted at the bottom end of the lower connecting cylinder, a U-shaped groove is formed in the center of the interior of the automatic focusing body, the right side of the interior of the U-shaped groove is communicated with the outside, a mounting plate is inserted into the U-shaped groove, and mounting assemblies are arranged between the front and rear surfaces of the interior of the U-shaped groove and the front and rear surfaces of the mounting plate; the mounting plate and the U-shaped groove are mounted through the mounting assembly, and a judgment assembly is arranged in the mounting plate; through the installation assembly, the judgment assembly and the automatic focusing body can be conveniently installed and detached, the judgment assembly is convenient to detach, overhaul and replace, and therefore the device is convenient to use.

The invention discloses a high-definition industrial lens with a large target surface and a wide working distance, comprising a first lens group G1 with a negative optical power and a second lens group G2 with a positive optical power arranged in sequence from the object plane to the image plane. When focusing, the first lens group G1 is fixed relative to the image plane, and the second lens group G2 moves along the optical axis; the high-definition industrial lens with a large target surface and a wide working distance also meets the following conditions: 2.0≤|F1 / F2|≤6.0, ‑0.3≤f / F1≤0.1, wherein F1 is the focal length of the first lens group G1, F2 is the focal length of the second lens group G2, and f is the focal length of the optical system. The application meets the requirements of a large target surface with high pixels, a wide working distance range, good and stable analytical performance, small optical system distortion, and high imaging quality.

The present invention provides a method and device for automatically determining the focus position of a fluorescent dark-field camera, the method comprising: obtaining immunofluorescence images of different focus positions of a slide; grayscale processing the immunofluorescence images to form a first information set of the immunofluorescence images; blurring and grayscale processing the immunofluorescence images to form a second information set of the immunofluorescence images; calculating the MSE value of the immunofluorescence images based on the first information set and the second information set, and the MSE value is used as the clarity value of the immunofluorescence images. The method for automatically determining the focus position of a fluorescent dark-field camera provided by the present invention can effectively and quickly determine the focus position of the fluorescent dark-field camera, has a fast focusing speed, high efficiency, and is easy to operate automatically.

According to the automatic focusing method and device based on the image information entropy exponentiation and the storage medium provided by the invention, the exponentiation is performed on the information entropy, so that accurate judgment can be made under the condition of low image contrast, the sensitivity of the evaluation function is improved, the evaluation function has polynomial characteristics, and the accuracy of focusing is improved. Then data points around the peak region are extracted for polynomial fitting, the fitting accuracy is improved, and then the automatic focusing precision is improved; according to the automatic focusing device, automatic focusing of the device can be achieved, a focusing mechanism does not need to be additionally arranged, high-precision automatic focusing can be achieved only through two times of mountain climbing searching, cost is low, and the focusing speed is high; compared with a traditional fundus focusing system needing to add a special focusing target and the like, the method is particularly suitable for automatic focusing of a fundus confocal system, and the influence caused by ametropia can be effectively avoided.

The invention discloses an electric zoom lens, which includes a lens barrel, a lens, a focusing mechanism and a detection component; the lens barrel is a hollow structure; the focusing mechanism includes a focusing component and a focusing ring, the focusing component includes a driving member, a slider and a connecting member, the focusing ring is sleeved outside the lens barrel and connected to the lens, the driving member drives the focusing ring to rotate through the slider to adjust the distance of the lens relative to the lens barrel to achieve rapid focusing; the detection component is used to detect the position change during the zooming process of the lens. The present invention can realize accurate detection of position changes during lens zooming, with high reset accuracy; can greatly reduce the number of empty return steps during the focusing process of the electric zoom lens, thereby greatly improving the focusing speed of the current electric zoom lens, and greatly reducing the difficulty of realizing the synchronous focusing function; when focusing, the lens group moves fast, which improves the focusing speed of the lens, the transmission efficiency of the transmission system is high, and the load driving capacity loss is small; and extremely low operating noise can be achieved.

The invention relates to the field of camera modules, and provides a focusing device, an assembling method and a lens system.The focusing device comprises a base, a supporting piece, a carrier and two traction wires; the carrier is positioned right above the base; a lens is arranged in the carrier, the carrier is used for adjusting the focusing position of the lens when moving relative to the base in the optical axis direction, and the optical axis direction is perpendicular to the top end face of the base. The bottom end of the supporting piece is connected to the top end of the base. The supporting pieces are distributed around the carrier; each traction wire is provided with two tail sections and a middle section; the middle section is positioned between the two tail sections; the traction wire is made of a shape memory material; the tail section is fixedly connected with the top end of the support; the tail section is electrically connected with the power supply unit; the power supply unit is used for loading current to the traction wire; the middle section is connected with the carrier; when the current on the traction wire changes, the traction wire is stretched or shortened so as to drive the carrier to move relative to the base. The focusing device is used for simplifying the structure of the focusing device so as to reduce the difficulty of assembling and driving an algorithm.

The present application proposes a method, device and storage medium for precise focusing of fluorescent biological cell photography, including first determining the acquisition parameters of the captured image, generating and saving the region of interest using bilinear interpolation. Capture images from the initial focus position, extract images of the specified position of the region of interest, and perform noise suppression and gradient calculation. A new image is obtained with the image gradient and the processed image as specific weights, and the statistical value score is calculated and cached. Adjust the focus height and repeat the operation to complete the image sequence, and select the optimal focus height index position by the hill climbing method. If it is 0 or the maximum index value, the coarse focus is repeated for the complete focus. After determining the image index, contrast focus is used as a supplementary solution for the range of [index‑2,index+2], including steps such as splitting the region of interest and calculating the contrast value, and finally selecting the maximum value index as the optimal focus height. This method improves the focus accuracy of fluorescent biological cell photography and adapts to the needs of different samples.