367 results about "Liquid lens" patented technology

A dynamic vision system includes a variable focus liquid lens optical assembly. The dynamic vision system includes a variable lighting assembly. The dynamic vision system includes a control system configured to adjust one or more optical parameters and data collected from the variable focus liquid lens optical assembly in real time. The dynamic vision system includes a control system configured to adjust the variable lighting assembly. The dynamic vision system includes a processing system that dynamically learns on a training set of outcomes, parameters, and data collected from the variable focus liquid lens optical assembly to train a set of machine learning models to control the variable focus liquid lens optical assembly to optimize collection of data for processing by the set of machine learning models.

The invention provides a focus-adjustable liquid double telecentric lens and intelligent production equipment, and relates to the technical field of optical lenses. The focus-adjustable liquid double telecentric lens comprises a first lens, a second lens, a third lens, a liquid lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object space to an image space along an optical axis; the first lens is a biconvex lens with positive focal power, the second lens is a biconvex lens with positive focal power, the third lens is a biconcave lens with negative focal power, the fourth lens is a biconcave lens with negative focal power, the fifth lens is a biconvex lens with positive focal power, and the sixth lens is a biconvex lens with positive focal power. Wherein the focusing position of the focusable liquid double telecentric lens is changed by adjusting the driving voltage or the driving current of the liquid lens, and rapid focusing under different working distances is completed. According to the embodiment of the invention, the system is small in size, and is excellent in imaging quality in a large depth-of-field range.

The invention relates to the technical field of surface defect detection, and discloses a liquid lens-based milling cutter defect automatic detection method and system, a computer readable storage medium and a computer program product. The method comprises the following steps: calculating definition evaluation scores of sequence images with different depths of field, drawing a definition evaluation curve, and forming a depth range of a foreground and a farthest view of clear imaging; intercepting part of images in the sequence images with different depths of field in the depth range, aligning and fusing to obtain a full-depth-of-field picture of the milling cutter; and putting into a pre-trained computer vision detection model for detection. According to the milling cutter defect automatic detection method based on the liquid lens, the dynamic focusing capability of the liquid lens is utilized, multi-position and multi-angle imaging is combined, sequence images with different field depths are collected, field depth fusion is carried out to generate a full-field-depth picture, and then defect detection and recognition are carried out by utilizing a computer vision detection model; therefore, the defect detection precision and detection efficiency of the complex-shaped milling cutter are improved.

A head-mounted device may have lenses. A user may view images through the lenses from eye boxes. The lenses may be tunable liquid lenses. Each lens may have a lens chamber. The lens chamber of the lens may have rigid and / or flexible walls that form optical lens surfaces. Actuators and / or pump and reservoir systems may deform the lens surfaces in response to control signals from a control circuit to tune the lens. Each liquid lens may have oil or other liquid in the lens chamber for that lens. Inorganic dielectric particles or other refractive-index-adjustment particles may be used to adjust the refractive index of the lens. The particles may be subwavelength in size.

The invention discloses an optical zoom head-up display system which comprises a windshield and a zoom imaging system, and the zoom imaging system is composed of an imaging display unit, an optical zoom module, a secondary reflector and a main reflector. Light is emitted from the imaging display unit, is subjected to focal length modulation through the optical zoom module, and is reflected to the position of a driver eye box through the secondary reflector, the main reflector and the windshield in sequence, so that a virtual image with an adjustable imaging distance is formed. The optical zoom module realizes dynamic adjustment of focal length through an Alvarez free-form surface lens or a liquid lens, acquires distance information of a front vehicle in real time by combining with a vehicle-mounted sensor, and synchronously adjusts a virtual image display distance (continuously adjustable in 5-20m), so that a virtual image is attached to a background scene, and visual fatigue is reduced. The system adopts a compact design, the zoom function is concentrated in the optical module, volume expansion and adaptive vehicle-mounted space limitation caused by a traditional mechanical structure are avoided, and the driving safety and comfort are improved.

This invention provides a liquid lens and a rapid focusing method using the liquid lens, belonging to the field of focusing device technology. The liquid lens includes: a feature determination module for real-time acquisition of the current visibility features of all monitored objects within the current field of view of the liquid lens; a focus determination module for determining the current target focus position of the liquid lens based on the current visibility features and focusing habit data of all monitored objects within the current field of view of the liquid lens; a curvature calculation module for calculating the target curvature of the liquid lens based on the current target focus position; and a curvature control module for setting the output current of the curvature control device of the liquid lens based on the target curvature of the liquid lens to obtain a rapid focusing result of the liquid lens. This allows for the reasonable determination of the focus position based on the user's focusing habits when multiple monitored objects exist within the field of view of the liquid lens, and enables rapid focusing control of the liquid lens.

The invention provides a multi-target adaptive optical tracking method and system for an unmanned intelligent turntable. The method comprises the following steps: acquiring a video stream and turntable attitude data on an unmanned intelligent turntable; carrying out scene understanding operation on the video stream, fusing the dynamic attention area and extracting spatial distribution information of a plurality of moving targets in a rotary table coordinate system; calculating an optical deformation parameter of the liquid lens, and driving the liquid lens to execute non-uniform optical curved surface adjustment, so that a focus area simultaneously covers a plurality of spatially dispersed moving targets; receiving distance data fed back by the distance measuring equipment, carrying out cross validation on the distance data and actual optical parameters of the adjusted liquid lens, and generating a cooperative calibration instruction when the deviation exceeds the tolerance; and synchronously updating the dynamic region of interest identification logic of scene understanding and an optical deformation parameter calculation strategy according to the instruction. According to the invention, the stability and spatial positioning precision of multi-moving-target tracking in a wide-area complex scene are improved.

The invention provides a short-wave infrared detection device in the field of semiconductor chip detection, which is characterized in that the side edge of a mirror tube is connected with a laser sensor, the mirror tube is connected with a microscope through a liquid lens, and the microscope is arranged corresponding to backlight; the laser sensor detects the linear distance between the laser sensor and the surface layer of the chip, the liquid lens performs focusing according to the detected linear distance, backlight lights from the bottom of the chip, and the short-wave infrared camera detects the surface of the chip. According to the invention, the liquid lens performs autonomous focusing according to the distance to the surface layer of the chip measured by the laser sensor, the image capturing precision is improved, the combination of the special short-wave infrared camera, the special lens tube and the special short-focus SWIR microscope is adopted, the FOV: 3.53 mm * 2.83 mm is realized, the depth of field of field is 6 [mu] m, the precision is 1.38 / pixel, the liquid lens can penetrate through the surface layer of the chip to perform high-definition detection, and the problem of out-of-focus is effectively solved.

The invention relates to an image sharpening method based on a liquid lens, an optical lens and a visual system.The method comprises the steps that the liquid lens is used for obtaining a set of image data, and the set of image data comprises a plurality of first images which are positive integers larger than or equal to 1; identifying a focusing position of a first image, and identifying depth-of-field information of the first image where the focusing position is located; and arranging and fusing the plurality of first images based on the depth-of-field information to obtain a fused and sharpened second image, and rapidly positioning a focusing position and identifying the depth-of-field information through a liquid lens technology in combination with voltage data and image identification, thereby realizing rapid fusion and sharpening processing of the plurality of images.

The invention relates to a contactless, multimodal biometric device (1) for the biometric verification and / or biometric identification of a person, comprehensive: - one processing unit (20), - a first camera unit (4) arranged to scan a space outside the biometric device (1) or in an open cavity of the biometric device (1) and comprising a first lens (4b) and a first camera sensor (4a) connected to a processing unit (20), and - a first proximity sensor (6) for measuring the distance of an object located in the space detected by the first camera unit (4) from the first proximity sensor (6), which is connected to the processing unit (20) for transmitting the measured distance values, - wherein the first lens (4b) is designed as a liquid lens and is connected to the processing unit (20) to receive signals for its focusing based on the distance values ​​measured by the first proximity sensor (6).

The invention provides an automatic focusing lens and an optical device, and relates to the technical field of optical elements. The automatic focusing lens comprises a first lens group, a diaphragm and a second lens group which are sequentially arranged on an optical axis along a direction from an object side to an image side, wherein any one of the first lens group and the second lens group comprises at least one fixed-focus lens; and at least one liquid lens arranged on the optical axis. By optimizing the positions of the liquid lens, the first lens group and the second lens group, the focal length of the liquid lens and the focal length of the first lens group, or the focal length of the second lens group, or the focal length of the automatic focusing lens are optimized to meet respective corresponding conditions, so that the automatic focusing lens can focus and image clearly along with the change of the shooting distance. The liquid lens can realize the zooming function without being controlled by mechanical structures such as a voice coil motor, so that by adopting the liquid lens, the focusing response speed of the automatic focusing lens can be improved, and the volume of the automatic focusing lens can be reduced.

The invention belongs to the technical field of laser beam expanders, and discloses a self-adaptive zoom laser beam expander based on a liquid lens and a working method of the self-adaptive zoom laser beam expander. The self-adaptive zoom laser beam expanding lens comprises a laser beam expanding lens barrel, an objective lens group, a zoom group, a collimating lens group and a driving module, the objective lens group is used for expanding the incident laser beam and forming a divergent laser beam; the zoom group comprises a plurality of liquid lenses and is used for modulating the divergence angle and the beam direction of the divergent laser beam formed by the objective lens group and forming a modulated laser beam; the collimating lens group is used for collimating the modulated laser beam formed by the zoom group and forming a collimated laser beam; the driving module is used for dynamically changing the focal length of the liquid lens in the zoom group according to requirements. The technical scheme of the invention has the advantages of compact structure, high response speed, no mechanical loss and lower cost, and can realize continuous change of beam expanding multiplying power.

The utility model relates to a uA-level positive and negative output constant current source circuit, which comprises a microcontroller, an H-bridge module, a DAC (Digital-to-Analog Converter) circuit and a current adjusting module, the microcontroller controls the H-bridge module, and the H-bridge module is connected with a load and outputs forward current or negative current to the load; the microcontroller controls the DAC circuit to output a DA value, and the DAC circuit is connected with the current adjusting module and used for controlling the stepping precision of the current output to the load. According to the utility model, on one hand, the flow direction of current passing through a load can be controlled through the H-bridge circuit, and positive and negative current output is realized; on the other hand, the stepping precision of the current passing through the load is controlled through the current adjusting module, and uA-level stepping current is achieved; compared with a common constant current source circuit, the constant current source circuit can better meet the electric control requirements of special loads such as a liquid lens.

The invention discloses a super-multilayer optical storage read-write and servo device and method based on a liquid lens. The super-multilayer optical storage read-write and servo device comprises a read-write module, a liquid objective lens, a liquid collimating lens, a servo module and an optical storage medium with an independent servo guide layer. The optical system is used for adjusting the focal length of the liquid objective lens and the focal length of the liquid collimating lens, so that writing or reading light beams emitted by the read-write module can be converged to different recording layers of the optical storage medium through the liquid objective lens, and data writing or reading of the optical storage medium is carried out. Servo light beams emitted by the servo module pass through the liquid collimating mirror and the liquid objective lens and then can be always converged on the independent servo guide layer of the optical storage medium. The liquid objective lens and the liquid collimating lens are arranged, and the focal lengths of the liquid objective lens and the liquid collimating lens are regulated and controlled by external voltage, so that modulation at extremely high response frequency can be realized, the device has the advantage of high response speed, and a servo light beam can be always focused on the surface of the independent servo guide layer under the condition that the thickness of an optical storage medium is not uniform.

The invention discloses a near-infrared confocal microscopic imaging system and a near-infrared confocal microscopic imaging method, and relates to the technical field of optical microscopic imaging. The method comprises the following steps that near-infrared exciting light sequentially passes through a beam expanding system, a liquid lens and a confocal scanning light path to irradiate a to-be-detected sample so as to generate a near-infrared fluorescence signal, and the liquid lens is used for adaptively adjusting the focal length and wavefront morphology according to the depth of the to-be-detected sample; a photomultiplier detects the near-infrared fluorescence signal after non-focus scattered light is filtered out through the confocal scanning light path and the pinhole, and a fluorescence signal image is obtained; and according to the fluorescence signal image, carrying out iterative optimization on the focal length and phase modulation parameters of the liquid lens to maximize the image sharpness or the signal-to-noise ratio and realize the three-dimensional microscopic imaging of the deep tissue. According to the near-infrared confocal microscopic imaging method provided by the invention, deep near-infrared microscopic imaging with low phototoxicity, low cost and high resolution can be realized.

The invention discloses a self-adaptive visual tactile sensor and an adjusting method, the self-adaptive visual tactile sensor comprises a base and a shell, a control panel, a camera and at least one light source assembly are fixedly arranged on the base, a contact assembly is fixedly arranged at the upper end of the shell, and the self-adaptive visual tactile sensor is characterized in that a light source rotation driving mechanism is arranged on the base, and a liquid lens is fixedly arranged on the base; the liquid lens is located between the camera and the contact assembly, the center of the liquid lens and the optical axis of the camera are located on the same straight line, and the local focal length of the liquid lens and the included angle between the light source assembly and the horizontal plane can be automatically adjusted through electric signals sent by the contact assembly. The system has the advantages that imaging of the camera is clear, and the imaging quality is ensured; moreover, the camera achieves secondary focusing through the liquid lens, so that the camera does not need to adjust the position of the lens for imaging of different object distances, the focusing distance between the contact assembly and the camera is greatly shortened, and the overall size of the visual tactile sensor is reduced.

The invention relates to a membrane based fluidic lens (1,1') with a non-circular membrane (3,3') and a non-circular aperture, a partially flexible lens shaper (2, 2') for adjusting a focal length of the lens (1,1'), an actuation assembly to adjust the focal length and a means to inherently adjust for acceleration-induced aberrations.

Disclosed in the present application are a tab detection system and method. The tab detection system comprises: an upper computer, which is electrically connected to a camera provided with a liquid lens, wherein the upper computer is used for outputting multiple voltage signals to the liquid lens and sending an image collection signal to the camera when a battery cell assembly reaches a tab detection station, and the liquid lens is used for adjusting the focal length of the liquid lens on the basis of each voltage signal; and the camera, which is used for collecting, on the basis of the image collection signal and by means of the liquid lens, a first image of a tab of the battery cell assembly after the focal length of the liquid lens is adjusted each time, so as to obtain multiple first images, and sending the multiple first images to the upper computer, wherein the upper computer is further used for fusing the multiple first images into a second image, and performing appearance defect detection on the tab on the basis of the second image to obtain a detection result. Thus, the appearance defect detection of the tab can be realized.

The invention discloses an optical adjustment method, head-mounted display equipment and a storage medium, and relates to the technical field of head-mounted display equipment, the optical adjustment method is applied to the head-mounted display equipment, and the head-mounted display equipment comprises a biological feature acquisition module and a liquid lens array; the method comprises the following steps: acquiring target biological characteristic data of a wearer through a biological characteristic acquisition module; the target biological characteristic data are input into a preset optical parameter prediction neural network model, target optical parameters are obtained through prediction, and the optical parameter prediction neural network model is obtained by taking the biological characteristic data as a sample and taking the optical parameters as label training; and adjusting the control voltage of the liquid lens array based on the target optical parameter so as to adjust the target curvature of the lens in the liquid lens array. The head-mounted display device can adapt to biological characteristic data of different users, the focal length of the head-mounted display device is automatically adjusted, and the VAC effect of the head-mounted display device is reduced.

One embodiment comprises: a housing; a bobbin arranged in the housing; a lens barrel coupled to the bobbin; a coil arranged in the bobbin; a magnet which is arranged in the housing so as to face the coil and which moves the bobbin in the optical axis direction by means of interaction with the coil; a liquid lens arranged on the lens barrel; and a pressurizing unit which is arranged between the upper surface of the bobbin and the liquid lens and which pressurizes the liquid lens by means of the movement of the bobbin.

The invention discloses a one-dimensional view field deflection liquid lens which comprises window glass, a lens cavity, a supporting shaft, an inner ring, electrodes, filling liquid I and filling liquid II. The lens cavity and the inner ring share the same optical axis. Wherein window glass is arranged above and below the lens cavity, two groups of electrodes which are symmetrical up and down are arranged on the inner wall of the cavity, and a pair of supporting shafts is arranged on the transverse symmetry axis of the inner wall of the cavity. The inner ring is provided with two coaxial circular openings, two nesting holes and two square openings. The two coaxial circular openings are located on the upper and lower surfaces of the inner ring, the two nesting holes are located on the side wall of the inner ring, and the two square openings are located on the side wall of the inner ring. According to the invention, the cavity is filled with two liquids which are mutually insoluble and have matched density, and the filling liquid I in the driving inner ring is pulled up and down through voltage on-off of the electrode and the supporting shaft, so that zooming and view field deflection of the lens are realized. The liquid lens has the advantages of being simple in structure, high in response speed, low in cost, large in view field deflection range and zoom range and the like.

The invention provides a monocular real-time intensive depth estimation method and system, and the method comprises the steps: collecting a plurality of clear object edge images in a process that a sensing-storage-calculation integrated visual sensor controls the continuous zooming of the focal length of a liquid lens; determining a focal length corresponding to the edge of a clear object in the view in the image acquisition process; determining depth information corresponding to the edge of the clear object according to the focal length corresponding to the edge of the clear object in the visual field, the distance between the sensing-storage-calculation integrated sensor and the liquid lens and a camera imaging principle; according to the depth information, carrying out color endowing processing on the edge of the clear object, and carrying out image fusion processing on a plurality of clear object edge images to generate a sparse depth estimation image; and carrying out edge filling processing and depth filling processing on the clear object edge in the sparse depth estimation image, and determining an intensive depth estimation image. According to the invention, efficient and accurate depth estimation is realized in an environment with limited computing resources.

The invention belongs to the field of NED equipment detection, and particularly discloses an NED equipment detection method and device, and the method comprises the steps: obtaining display pictures of NED equipment in different view fields through an NED detection device, thereby obtaining a modulation transfer function MTF1 in the meridian direction of each view field of the display pictures and a modulation transfer function MTF2 in the sagittal direction of each view field of the display pictures, the NED device comprises a near and far vision correction layer and / or an astigmatism correction layer; at least one of the spherical diopter, the cylindrical diopter and the azimuth angle of the optical axis of the liquid lens is adjusted until the MTF1 and the MTF2 are both not smaller than a preset MTF threshold value, and the NED detection device comprises the liquid lens; determining parameters of a correction layer of the NED based on the adjusted parameters of the liquid lens; and / or obtaining a picture displayed by the NED equipment by using the adjusted NED detection device, and carrying out picture quality detection. According to the invention, the NED equipment can be detected more efficiently and accurately, the production efficiency and the product quality are improved, and the detection cost is reduced at the same time.

The invention provides a hologram rapid acquisition method based on an elastic film liquid lens. The method comprises the following three steps: step 1, acquiring a focus stack of a real 3D scene in real time by using a liquid camera based on the elastic film liquid lens; 2, inputting the obtained focus stack into an angular spectrum diffraction propagation model so as to quickly calculate complex amplitude distribution of the focus stack on a hologram plane; and 3, quickly coding the complex amplitude distribution of the focus stack on the hologram plane into a pure phase hologram by using a double-phase coding method. The obtained pure phase hologram is loaded to a spatial light modulator, and a real 3D scene is reproduced after laser irradiation.

The application provides a liquid lens focus stack imaging method, system and electronic equipment, and belongs to the technical field of optical imaging detection. The method comprises the following steps: a power supply module is controlled to provide a driving voltage for a liquid lens to form an image on a CMOS array; an image collected by the CMOS array is acquired, all images are aligned based on the image when the driving voltage is lowest, and an image sequence of a constant magnification focus stack is obtained; a focus state of the image sequence is evaluated, the image sequence is fused based on the focus state evaluation result, and a full-focus image is obtained; the object distance of the collected image is determined, a depth map is generated based on the object distance and the full-focus image, and a target image is generated based on the full-focus image and the depth map. The application aligns all collected images based on the image when the driving voltage is lowest, and solves the technical problem of low imaging accuracy existing in the existing focus stack imaging technology.

A liquid lens includes a first plate in which a cavity accommodating a conductive liquid and a non-conductive liquid is formed; a first electrode disposed on the first plate; a second electrode disposed under the first plate; a second plate disposed on the first electrode; and a third plate disposed under the second electrode, wherein the conductive liquid includes a solvent comprising 20 to 60% by weight of water and 20 to 60% by weight of antifreeze; 10 to 20% by weight of a solute; and 0.4 to 2% by weight of a chelation agent or an ion inhibitor.

Systems and methods for providing variable spot size and variable focus at a substrate are described. A variable focus lens group may be added to the alignment system to allow for adjustment of spot size and focus. The variable focal length lens is a liquid lens that is tunable based on a voltage applied across the lens. The switching voltage changes the water-oil interface in the liquid lens, which in turn changes the direction in which the light passes. For example, switching on a voltage across the lens shifts the light output direction to converge at the focus. As a result, the variable focal length lens provides adjustments to compensate for fixed spot size and focus disadvantages of the prior art. In addition, a variable focal length lens may also be applied to compensate for spot shift and higher order diffraction order.

The utility model relates to a liquid lens zoom foggy vision system, training instrument and optometry unit, foggy vision system is equipped with eyepiece lens cone, front lens cone, rear lens cone and objective lens cone in proper order along the optical path, the front lens cone is equipped with first lens and second lens in proper order, the rear lens cone is equipped with liquid lens and third lens in proper order, and the objective lens cone is equipped with second lens and third lens in proper order. The front lens barrel and the rear lens barrel form a variable-focus liquid lens telescopic system; a foggy view image display panel is arranged in the objective lens barrel and used for playing foggy view animations. The system further comprises a controller, and the liquid lens, the objective lens cone and the fog view image display panel are electrically connected with the controller. According to the fogging system, the zoom lens can be controlled to zoom through a circuit, video animation is played in combination with the fogging image display panel, switching of different images is achieved, the zoom response is fast, a complex structure and switching images are not needed, the structure is simple and small, the attention of trainees is better attracted, and the fogging effect is improved.

The application discloses a digital slice scanning fast focusing system adopting a liquid lens, wherein a liquid lens, a left focusing camera and a right focusing camera are installed in the optical path of a digital slice scanner; the liquid lens is installed between an objective lens and an image-taking camera; the left focusing camera and the right focusing camera are respectively installed on the left side and the right side of the image-taking camera to collect focal plane images; a computer processing device is connected with the left focusing camera and the right focusing camera respectively to obtain a focal plane signal according to the focal plane images collected by the left focusing camera or the right focusing camera; the computer processing device is connected with a constant current source driver to send the focal plane signal; and the constant current source driver is connected with the liquid lens to send different driving currents to control the liquid lens to focus. The application adds two focusing cameras (the left focusing camera and the right focusing camera) to expand the focusing FOV to quickly obtain the focal plane signal, and then controls the liquid lens to quickly adjust to the focal plane.

An embodiment comprises: a substrate; a sensor base disposed on the substrate; a lens holder disposed on the sensor base; a lens barrel coupled to the lens holder; and a first lens part disposed inside the lens barrel, wherein: the first lens part comprises a holder, a liquid lens disposed inside the holder and including an upper electrode and a lower electrode, and a terminal disposed in the holder and electrically connected to the upper and lower electrodes; the upper electrode comprises a first upper electrode, a second upper electrode, a third upper electrode, and a fourth upper electrode, which are spaced apart from each other; the lower electrode comprises a first lower electrode, a second lower electrode, a third lower electrode, and a fourth lower electrode, which are spaced apart from each other; and the first lower electrode is a first common electrode for the upper electrode, and the second lower electrode is a second common electrode for the third lower electrode and the fourth lower electrode.