104 results about "Autofocus" patented technology

This invention discloses a phase compensation method for ship targets using ISAR based on block phase gradient autofocus. The steps include: pulse compression; range cell migration correction; range-oriented block segmentation; block phase compensation; calculation of the offset between adjacent image blocks; and image block alignment and stitching. This invention performs range-oriented block segmentation of the target echo, overcoming the shortcomings of existing technologies that ignore the spatial variation of rotational phase error, leading to defocusing in ship imaging, thus improving the accuracy of phase compensation and achieving good image focusing effect. Because this invention uses a phase gradient autofocus algorithm to compensate for the phase error within each block, and then uses a cross-correlation method to align and stitch the images of each block region, it overcomes the shortcomings of parameter estimation methods, such as complexity, time consumption, and poor real-time performance, and has the advantages of simple implementation, high efficiency, and strong real-time performance.

The invention discloses an automatic focusing method and device, computer equipment and a computer readable storage medium, and relates to the technical field of focusing. The method comprises the following steps: performing multi-target tracking detection on a preview image frame to obtain a face frame set, a human eye frame set and a multi-target tracking parameter; performing scale measurement aperture unification on the face frame set and the eye frame set to obtain a target face frame width and a target eye frame width; calculating a human face available threshold value and a human eye available threshold value; determining a depth-of-field coverage judgment result of the focusing target according to a depth map corresponding to the preview image frame; and according to the target face frame width, the target eye frame width, the multi-target tracking parameter after smoothing normalization, the depth-of-field coverage judgment result, the face available threshold and the eye available threshold, determining a focusing strategy to perform focusing switching. Therefore, the stability of the exported picture, the accurate focus and the smooth switching are ensured through automatic focusing.

An autofocus system and an autofocus method. The autofocus system comprises: a primary inspection microscope module (20), a defocus information measurement module (10), a main control module (30), and a drive motor module (40). The defocus information measurement module (10) comprises an adjustable array light source (1011) configured to adjust a light-emitting region on the basis of a preset condition. Measurement light emitted from the light-emitting region sequentially passes through a second beam-splitter prism (102) and a first beam-splitter prism (202), and is then projected by a microscope objective lens (203) to each of sub-regions to be inspected, generating reflected light; the reflected light sequentially passes through the first beam-splitter prism (202) and the second beam-splitter prism (102), forming a pair of light spots on the defocus information measurement module (10) and corresponding to each of said sub-regions; and on the basis of light spot information of each pair of light spots, the main control module (30) instructs the drive motor module (40) to drive the primary inspection microscope module (20), so as to sequentially focus on each of said sub-regions and to capture an image of each of said sub-regions after focusing is completed. On the basis of the autofocus system and the autofocus method, focusing efficiency can be improved.

This application provides a dynamic tool setting device and method for diamond micro-end milling cutters, relating to the field of precision and ultra-precision machining technology. The method includes the following steps: acquiring a time-series pulse sequence of time-division multiplexing images; and performing tool setting detection on the diamond micro-end milling cutter based on the time-series pulses. This application utilizes the diffraction interference imaging principle of diamond micro-end milling cutters under coaxial laser illumination, employing object-side telecentric vision imaging to ensure a fixed holographic image magnification and microscopic imaging accuracy. By setting the camera trigger acquisition pulse through an external trigger controller via a host computer, the rotating image of the diamond micro-end milling cutter is sampled in a time-division multiplexing manner, achieving full-contour holographic imaging of the diamond micro-end milling cutter under rotating conditions. Simultaneously, by designing a downsampling holographic autofocus algorithm in holographic image processing, the computational load for image holographic reconstruction is reduced, accelerating the tool setting calculation efficiency and providing high-precision tool setting technology support for ultra-precision micro-milling.

This embodiment relates to shape memory alloy (SMA) actuator designs that may have custom-sized SMA filament lengths and / or brackets specific to different systems (e.g., optical image stabilization systems, autofocus systems). The actuator may include a universal base (or fixed end) and a universal end portion (or free end), both of which are interchangeable in different SMA designs.

The present disclosure relates to a light detection device and an electronic apparatus that make it possible to improve autofocus performance. Provided is a light detection device comprising a pixel array unit in which a plurality of pixels, including a pixel in which a plurality of photoelectric conversion units are formed with respect to one microlens, are arranged in a two-dimensional array. In the pixel, the plurality of photoelectric conversion units are isolated in a first direction and / or a second direction different from the first direction in plan view. The isolation performance in the first direction is lower than the isolation performance in the second direction. The present disclosure is applicable to, for example, a solid-state imaging device such as a CMOS image sensor.

This utility model discloses a law enforcement recorder with autofocus function, including a recorder body and a fixing clip structure disposed on the recorder body. The fixing clip structure is disposed on the back of the recorder body via a rotation limiting device, and the recorder body is fixed to the chest or shoulder of the law enforcement officer via the fixing clip structure. The front of the recorder body is provided with a camera assembly with autofocus function for shooting at different distances to adapt to different application scenarios. The elastic clamping rod and inner clamping protrusion of the fixing clip structure of this utility model provide a stable clamping force, which can reliably fix it to the law enforcement officer's clothing of different thicknesses and is not easy to fall off.

The present disclosure relates to an imaging system including: an objective having an optical axis defining a z-direction; an autofocus illumination module arranged to project, via the objective, a reference beam onto a reflective interface positioned in the field of view of the objective; and an image sensor arranged to image, via the objective, a reflection of the reference beam from the reflective interface. The autofocus illumination module is arranged so that the value of a parameter derivable from an object profile of the reference beam at the objective focal plane is an inflection value in the context of values of the parameter derivable from object profiles of the reference beam at planes corresponding to z-positions either side of the objective focal plane.

A slide imaging device (110) for digital morphology in hematology is disclosed, comprising at least one z-axis stage (112) configured to place a microscope slide (114) at a sample plane, wherein a biological sample may be placed on the microscope slide (114), wherein the z-axis stage (112) is configured to set a relative distance along the optical axis (118) of the slide imaging device (110) between the microscope slide (114) and the imaging system (116) of the slide imaging device (110). The slide imaging apparatus (110) further includes at least one sample beam path and at least one autofocus beam path, the at least one autofocus beam path including at least one pattern illumination source (132), the at least one pattern illumination source including at least one light emitter (134) and at least one grating (136), wherein the grating (136) is tilted relative to the optical axis (118) of the slide imaging apparatus (110), wherein the autofocus beam path includes at least one second transmission system (140) and at least one autofocus camera (138), wherein the second transmission system (140) is configured to allow a pattern generated by the pattern illumination source (132) to be projected onto the sample plane and to allow a pattern reflected from the sample plane to be propagated to the autofocus camera (138), wherein the autofocus camera (138) is configured to generate at least one digital autofocus image of the pattern reflected from the sample plane. The slide imaging apparatus (110) further includes at least one processing unit (148) configured to analyze the digitally autofocused image, wherein the analysis includes spatial analysis of contrast and determination of the image location with maximum contrast. The slide imaging apparatus (110) further includes at least one control unit (150) configured to control the z-axis stage (112) taking into account the determined image location to position the microscope slide (114) along the optical axis (118) of the slide imaging apparatus (110).

The application provides an automatic focusing method for wafer detection, a focusing system, a computer readable storage medium and an electronic device, wherein the automatic focusing method comprises the following steps: for a wafer surface focusing area, a plurality of original images with different exposure times are collected by a camera, high dynamic range (HDR) synthesis and non-linear correction are performed on the original images to obtain a preprocessed image; at least one quality evaluation index of the preprocessed image is calculated, if the index does not reach a preset threshold, it is determined that the current image is invalid and is discarded; if the verification is passed, subsequent steps are performed; at least one focusing sharpness feature is extracted from the preprocessed image that passes the verification; based on the extracted focusing sharpness feature, a comprehensive focusing score of the current image is calculated; a search is performed in the Z-axis direction, and the above steps are repeatedly performed iteratively at different Z-axis positions to obtain the comprehensive focusing scores corresponding to the positions; the Z-axis position that makes the comprehensive focusing score reach the maximum is found as the best focusing position.

The application discloses an optical automatic focusing system and method. The optical automatic focusing method comprises the following steps: determining the standard of a microscopic objective lens to be focused according to a preset standard strategy; determining the focal plane information of a gene sequencing chip to be collected according to a preset standard strategy; determining an objective lens adjustment fitting formula based on the standard and the focal plane information; irradiating the upper surface of the gene sequencing chip by using a preset light source, and acquiring target light reflected from the upper surface of the gene sequencing chip; acquiring an energy signal corresponding to the target light by using an energy detection unit; determining the adjustment distance of the microscopic objective lens according to the objective lens adjustment fitting formula and the energy signal; and automatically controlling the rising or falling of the microscopic objective lens according to the adjustment distance. After the standardization and standardization of the gene sequencing chip are completed, as long as the chip is not taken out, the adjustment distance of the microscopic objective lens can be determined according to the energy signal acquired after each change during the continuous sequencing work, and automatic, rapid and accurate focusing can be performed.

A method for maintaining focus of an optical system on a target surface is provided. The method includes directing at least one beam of light through an objective lens to a sample, wherein the at least one beam of light is associated with at least two effective numerical apertures and receiving at least one reflected beam at the objective lens. The at least one reflected beam is associated with the at least two effective numerical apertures. The method also includes determining at least one image based on the at least one reflected beam, determining a baseline of a feature for each of the one or more objects, and when the feature differs from the baseline, adjusting a working distance between the objective lens and the sample.

This invention discloses an autofocus optical imaging system based on a liquid lens, comprising a first lens group, an aperture, a second lens group, a cover glass, and a CMOS photosensitive surface arranged sequentially from left to right along the incident light direction. The first lens group includes lenses one, two, and three; lenses one and two have positive refractive power, are convex on the object side, and concave on the image side; lens three has negative refractive power, is concave on the object side, and concave on the image side. The second lens group includes lenses four, five, six, liquid, seven, and eight; lens four has positive refractive power, is convex on the object side, and convex on the image side; lens five has negative refractive power, is concave on the object side, and convex on the image side; lens six has positive refractive power, is convex on the object side, and convex on the image side; lens seven has positive refractive power, is convex on the object side, and convex on the image side; and lens eight has negative refractive power, is concave on the object side, and convex on the image side. The liquid lens includes a first transparent surface layer, a first liquid region, an elastic film layer, a second liquid region, and a second transparent surface layer. It has a wide operating band, a large field of view, a large target surface, and a small F-number. It can quickly autofocus, is noiseless, has a compact structure, and has stable imaging quality.

The present invention relates to a dynamic detection device and a dynamic focusing algorithm. The dynamic detection device includes: a computing unit; a screen; a structured light; a radar; an autofocus lens; an external power supply unit; and an internal power supply unit; wherein the screen, the structured light, the radar, the external power supply unit, and the internal power supply unit are all electrically connected to the computing unit; and the radar is electrically connected to the autofocus lens.

An electronic device according to an embodiment comprises: a lens assembly including one or more lenses aligned along an optical axis; an auto focus (AF) module comprising circuitry configured to move the lens assembly in the direction of the optical axis; an optical image stabilization (OIS) module comprising circuitry configured to move the lens assembly in a plane perpendicular to the optical axis, wherein the OIS module includes a unit correction section based on a driving range of the OIS module, a movement range of the lens assembly in the plane according to driving of the AF module, and a resolution of the OIS module; an image sensor configured to acquire light passing through the lens assembly; a motion sensor; and at least one processor, comprising processing circuitry, electrically connected to the AF module, the OIS module, the image sensor, and the motion sensor, wherein at least one processor, individually and / or collectively, may be configured to: detect a motion of the electronic device using the motion sensor; drive the image sensor to recognize a subject; control the AF module so that the lens assembly moves to a first position on the optical axis based on the position of the subject; and control the OIS module to perform OIS based on the movement of the electronic device, the first position of the lens assembly, and the unit correction section of the OIS module.

A camera module is provided. The camera module includes an auto-focus (AF) holder coupled to a circuit board on which an image sensor is disposed, an AF drive part configured to move the AF holder, a lens holder coupled to a lens barrel that is configured to accommodate at least one lens, and an optical image stabilization (OIS) drive part that is configured to move the lens holder.

This application discloses a device and method for three-dimensional imaging of the composition and hardness of electromagnetic orbital deposits, including a detection host and a detection probe. The detection host triggers the laser and performs optical tomography (LIBS) data analysis outside the electromagnetic orbital chamber. It is equipped with a scanning path control system to achieve two-dimensional planar scanning of the deposited layer on the electromagnetic orbital surface. An automatic focusing control system not only scans the depth direction of the deposited layer on the electromagnetic orbital surface but also detects and corrects the levelness of the pulsed laser output end face of the detection probe relative to the area near the current scanning point on the electromagnetic orbital deposited layer surface, and automatically focuses the fiber optic output lens group in the detection probe relative to the bottom of the ablation pit at the current scanning point. Under the control of the detection host, the detection probe enters the electromagnetic orbital chamber to acquire optical tomography (LIBS) data in real time, in situ, non-destructively, and rapidly.

The present invention relates to a front lens type folding actuator in which a light refracting element performs AF driving, and to a front lens type folding actuator in which a light refracting element performs AF driving, the front lens type folding actuator being equipped with such a structure, the front lens type folding actuator being characterized by comprising: a case comprising a base and a housing and having an internal space; a through portion through which incident light from a subject is incident is formed on the upper surface of the case, a light emitting portion is provided on the side surface of the case, a light refraction AF module, an OIS module, and a lens module inserted into the through portion formed in the center of the OIS module are sequentially arranged in the inner space of the case from the bottom, and the light refraction AF module includes a light refraction element. Emission light emitted from the lens module is incident and emitted in a first direction toward the light emission unit in a state of being refracted by the light refracting element, and the light refracting AF module moves relative to the base in the first direction of the light emission unit and performs auto-focus driving, thereby changing the focal point of the emission light emitted from the lens module. The OIS module performs OIS driving in the first direction and a second direction perpendicular to the first direction on a plane perpendicular to incident light incident to the lens module, thereby causing the lens module to move slightly.

A camera module according to an embodiment disclosed herein may include a lens assembly, an AF carrier in which at least a portion of the lens assembly is located, a camera housing configured to receive the AF carrier, an AF actuator configured to drive the AF carrier to move in an optical axis direction with respect to the camera housing and having a portion disposed on the AF carrier and the camera housing, a first guide groove extending on a surface of the camera housing in the optical axis direction, a second guide groove extending on a surface of the AF carrier in the optical axis direction and facing the first guide groove, at least one first AF ball disposed between the first guide groove and the second guide groove, and a recess disposed on one of the camera housing and the AF carrier and facing the at least one first AF ball. Various other embodiments are possible.

The present document describes techniques for a magnetically self-shielded speaker box for a mobile device. The speaker box described herein includes a thin metal enclosure, thereby reducing or eliminating plastic components from the exterior enclosure of the speaker box. The metal of the enclosure has a high magnetic permeability to prevent penetration of a magnetic field generated by the speaker transducer within the exterior enclosure. Also, the exterior enclosure includes at least two enclosure portions that are joined together with a continuous welded seam. Accordingly, the speaker box described herein is a thin-walled, fully metal, high-permeability enclosure resulting in a smaller, self-shielded solution that reduces both (i) the total physical volume of the speaker box for a given internal speaker back volume and (ii) the spacing requirements to adjacent voice-coil-motor auto-focus camera modules.

This application relates to the field of semiconductor detection technology, and more particularly to a light source module, an optical focusing system, a semiconductor device, and a focusing control method. The light source module comprises multiple monochromatic light sources mounted on a substrate, each emitting light with a different wavelength, and each monochromatic light source includes at least one sub-light source. The light source module can be controlled to emit multiple illumination beams using a preset illumination mode, providing multiple independent or combined illumination channels for the subsequent focusing process. This allows the optical focusing system based on the light source module to utilize the chromatic aberration of different wavelengths of light to form a series of focal points at different positions along the axial direction, significantly expanding the effective axial focusing range of the measurement. Furthermore, the system organically integrates the light source module with a first mask, an objective lens module, a first beam splitter, a first detection subsystem, a second detection subsystem, and a processor, forming a complete, efficient, and high-precision autofocus closed-loop system.

This application discloses an autofocus method, comprising: application to an endoscope system, the endoscope system including an adjustable focus lens group and an image sensor, the image sensor being provided with phase detection pixels, the autofocus method comprising: acquiring an image captured by the image sensor and determining a focus area of ​​the image; acquiring phase information acquired by the phase detection pixels within the focus area and calculating a phase difference of the focus area based on the phase information; calculating the image sharpness of the focus area; and controlling the adjustable focus lens group to perform a focusing operation based on the image sharpness and the phase difference. Applying the technical solution provided in this application, stable and efficient autofocus can be achieved. This application also discloses an autofocus device, an endoscope host, and an endoscope system, all of which possess the aforementioned technical effects.

To provide a control device that enables proper autofocus operation. [Solution] The control device (204) includes an acquisition means (2041) for acquiring movement information of the subject and a control means (2042) for controlling the focus lens (104) using focus information acquired from the imaging signal. The control means (2042) changes the processing related to the autofocus tracking performance according to the movement information of the subject.

The application discloses a line confocal OCT corneal imaging device and method integrated with a liquid lens automatic focusing, a light source module outputs light, the light passes through a line illumination generation module along an optical axis, enters a first beam splitter to form two light beams, and the two light beams enter a sample arm module to be incident to a cornea to form a reflection and scattering light beam carrying corneal information; and enter a reference arm module, pass through a second reflector to form a reference light beam; the reflection and scattering light beam and the reference light beam return to the first beam splitter along the optical axis to interfere to generate a corneal low-coherence interference signal, and sequentially enter an imaging expansion module and a spectrometer module along the optical axis to image; a computer centrally controls a first detector in the spectrometer module, an electrically-controlled displacement table in the reference arm module and a second detector in a liquid lens module; the liquid lens module is optically coupled to the sample arm module through a dichroic mirror to realize real-time measurement of an axial eye movement. The application provides a safer and more reliable inspection tool for early diagnosis and precise evaluation of corneal diseases.

The application discloses an automatic focusing method and system based on a CMOS image sensor. The method comprises the following steps: irradiating the upper surface of a gene sequencing chip by using a focusing light source, and obtaining target light reflected by the upper surface; receiving the target light based on the CMOS image sensor, and obtaining a linear light spot diagram; determining a target linear light spot from the linear light spot diagram, then extracting light spot information according to a preset sampling area, and obtaining a corresponding signal distribution diagram; performing signal linear fitting on the signal distribution diagram corresponding to each preset sampling area, and obtaining a corresponding fitting curve; superimposing all the fitting curves to obtain a comprehensive signal diagram, determining the position of the light spot corresponding to the strongest signal in the CMOS image sensor according to the diagram, then adjusting the fitting formula based on an objective lens, determining the lifting adjustment distance of the microscopic objective lens, and automatically controlling the lifting of the microscopic objective lens. The method is simple and efficient, and can realize automatic, rapid and accurate focusing of the objective lens.

The method includes receiving an image frame captured by an image capture device. The method also includes determining a saliency heatmap representing the saliency of pixels in the image frame. The method further includes determining a primary region of interest (ROI) and a secondary ROI for the image frame based on the saliency heatmap. The method further includes determining a filtered ROI for the image frame, where the filtered ROI is updated from the previous filtered ROI to the primary ROI or the secondary ROI based on a saliency difference between the previous filtered ROI and the primary ROI or the secondary ROI exceeding a first threshold. The method also includes applying one or more autofocus processes based on the filtered ROI, the primary ROI, or the secondary ROI.

Devices, systems, and methods for providing a hybrid fixed focus during the operation of a character reader are disclosed. An exemplary system includes at least one imaging assembly; a controller; and one or more processors configured to (a) initiate a distance measurement operation; (b) determine a distance value associated with a distance between the imaging assembly and an object; (c) retrieve a threshold distance value from a memory; (d) compare the distance value with the threshold distance value; and (e) initiate a hybrid fixed focus operation, comprising: (i) excite an illumination assembly to provide illumination.and (ii) capturing a first set of images at a fixed focus position corresponding to the distance value in response to the distance value not exceeding the threshold distance value, and at the fixed focus position corresponding to the threshold distance value in response to the distance value exceeding the threshold; and (f) terminating the hybrid fixed focus operation based on a termination signal.

An image sensor includes a pixel array and a logic circuit. The pixel array includes a pixel isolation layer between adjacent pixels in a plurality of pixels. Each of the plurality of pixels includes a pixel circuit under at least one photodiode. The logic circuit obtains a pixel signal from the plurality of pixels. The pixel array includes at least one autofocus pixel including a first photodiode, a second photodiode, a pixel-internal isolation layer between the first photodiode and the second photodiode, and a microlens over the first photodiode and the second photodiode. The pixel-internal isolation layer includes a first pixel-internal isolation layer and a second pixel-internal isolation layer separated from each other in a first direction perpendicular to an upper surface of a substrate, the first pixel-internal isolation layer and the second pixel-internal isolation layer including different materials.