1086 results about "Zoom lens" patented technology

The utility model discloses a deformable lens, which comprises a first spherical lens group, a second spherical lens group, a first cylindrical lens group, a third spherical lens group, a second cylindrical lens group, a fourth spherical lens group and a twentieth lens which are sequentially arranged from an object space to an image space, the focal lengths of all the lens groups meet the following conditions: 1.4 lt; f (G1-G7) Y / f (G1-G7) Xlt; 1.6); 1lt; 1lt; f (G2) X / f (G1-G4) Xlt; -0.7,-0.7; -2lt;-2lt; f (G3) X / f (G1-G4) Xlt; -1.3,-1.3; 361t; 361t; f (G5) Y / f (G5-G7) Ylt; 24); 0.8 lt; f (G1-G4) X / f (G5-G7) Xlt; 1.2; 1.1 lt; 1.1 lt; f (G1-G4) Y / f (G5-G7) Ylt; and 1.7. The integrated design is adopted, so that the lens is small in size, and meanwhile, the optical performance of high resolution, low respiration, low distortion, 1.5 X high magnification and the like is obtained.

The utility model discloses a zoom lens, which comprises a first lens group with positive focal power, a second lens group with negative focal power, a third lens group with positive focal power, a fourth lens group with positive focal power and a fifth lens group with focal power, and is characterized in that the first lens group, the third lens group and the fifth lens group are fixed groups; the first lens group comprises a first lens, a second lens and a third lens; the second lens group comprises a fourth lens, a fifth lens, a sixth lens and a seventh lens; the third lens group comprises an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens and a thirteenth lens; the fourth lens group comprises a fourteenth lens, a fifteenth lens and a sixteenth lens; the fifth lens group comprises a seventeenth lens; the second lens group moves between the object side and the image side to realize continuous zooming between a wide-angle end and a telephoto end; and the fourth lens group moves between the object side and the image side so as to realize the compensation of the image surface position change in the zooming process.

The invention discloses an unmanned aerial vehicle autonomous inspection system and method based on AI identification, the system comprises an unmanned aerial vehicle body carrying a high-power optical zoom lens, an edge computing device and a function module, and the autonomous inspection of a power distribution tower is realized by fusing front-end AI identification and edge computing technologies. A Yolo structure is adopted to construct a lightweight tower recognition model, a dynamic route planning module is combined to realize single-point reference route generation and three obstacle crossing modes, and real-time coordinate correction in an RTK-free environment is supported. The edge computing device integrates a semi-supervised learning engine and a multi-sensor data fusion module, meets miniaturization design, and supports breakpoint continuous flight control and precise landing. The method covers automatic route generation, visual tracking, zoom cooperative control and self-adaptive task scheduling, solves the problems that a traditional unmanned aerial vehicle depends on manual operation, the data quality is poor and the efficiency is low, realizes whole-course automation of tower inspection in a complex environment, and is high in inspection efficiency, and the picture definition reaches the pin level.

The zoom lens consists of, in order from the object side, a first lens group that has a negative refractive power; a second lens group that has a positive refractive power; a third lens group that has a negative refractive power; and a fourth lens group that has a positive refractive power. During zooming, in each lens group, distances between the adjacent groups in the direction of the optical axis are changed. The first lens group consists of, in order from the object side, a first lens having a negative refractive power, a second lens having a negative refractive power, and a third lens having a positive refractive power. The third lens group consists of a negative lens. During focusing, only the third lens group moves along the optical axis. The zoom lens satisfies predetermined conditional expressions.

The utility model relates to an optical lens which is arranged along an optical axis from an object side to an image side. The utility model relates to a multi-lens zoom lens, which comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with positive focal power, a sixth lens with negative focal power, a seventh lens with positive focal power, an eighth lens with negative focal power and a ninth lens with negative focal power in sequence, and is characterized in that the first lens with negative focal power, the second lens with negative focal power, the third lens with positive focal power, the fourth lens with negative focal power, the fifth lens with positive focal power, the sixth lens with negative focal power, the seventh lens with positive focal power and the ninth lens with negative focal power are included; the focal power of the tenth lens is positive; the focal power of the eleventh lens is positive; the first lens is a convex-concave lens, and the eleventh lens is a convex-concave lens. The optical lens provided by the utility model at least has one of the characteristics of large aperture (F1.2), infrared confocal, 2K high image quality, support of dual-optical-path imaging, distance measurement and the like.

To provide a zoo lens which has a large aperture ratio and a minimized total length, offers less shift in the center of gravity while zooming and focusing and quiet autofocusing, and is suitable for video shooting.SOLUTION: A zoom lens of the present invention consists of a first lens group G1 having negative refractive power, an intermediate lens group GM having positive refractive power as a whole, a rear lens group GR, and a final lens group GN arranged in order from the object side, the intermediate lens group GM consisting of three or more lens groups including a focusing lens group configured to move along an optical axis while focusing from infinity to a short distance, and the rear lens group consisting of one or more lens groups. When zooming from the wide-angle end to the telephoto end, distances between the lens groups change as the intermediate lens group GM moves toward the object side, increasing the distance between the intermediate lens group GM and the rear lens group GR. The first lens group G1 and the final lens gup GN are stationary while zooming and focusing.SELECTED DRAWING: Figure 1

The invention discloses a focusing detection method, system and device and a medium. The detection method comprises the following steps: constructing a first mapping model among the real-time focal length of a zoom lens, the temperature of the zoom lens and the control voltage; constructing a second mapping model between the target focal length of the zoom lens and the light spot centroid offset and between the target focal length of the zoom lens and the current focal length of the zoom lens; acquiring a light spot image fed back by the surface of the to-be-measured object, and calculating to obtain a corresponding light spot centroid offset; acquiring the light spot centroid offset corresponding to the object to be measured, the current focal length of the zoom lens and the second mapping model to calculate the target focal length of the zoom lens; and obtaining the target focal length of the zoom lens, the current temperature of the zoom lens and the first mapping model to calculate the target voltage. Light spot image detection and zoom lens accurate voltage control are combined, actual errors caused by laser ranging during close-range imaging are effectively avoided, the image detection advantage of the image sensor is fully utilized, and the effect is more obvious especially during close-range detection.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, to a double individual-addressing multi-beam Raman system for use in QIP systems. A technique is described in which a first multi-channel modulator (MCM), a first telecentric zoom lens, and a first interleaver that form a first optical path of the Raman system that receives a first array of beams and adjusts the first array of beams to individually address atomic-based qubits in a chain from a first direction. Moreover, a second MCM, a second telecentric zoom lens, and a second interleaver form a second optical path of the Raman system that receives a second array of beams and adjusts the second arrays of beams to individually address the atomic-based qubits in the chain from a second direction different from the first direction.

The utility model provides a laser calibration structure, a pod and an unmanned aerial vehicle. The laser calibration structure comprises a shell; the zoom lens module and the laser ranging module are arranged in the shell, and the laser ranging module is provided with at least one adjusting end capable of moving in the vertical direction relative to the shell in the circumferential direction; wherein a displacement adjusting assembly is arranged between the adjusting end of the laser ranging module and the shell, and the displacement adjusting assembly is used for adjusting the displacement range of the adjusting end of the laser ranging module, so that the laser ranging module and the zoom lens module are kept parallel on the same plane. Through the simple laser calibration structure, the technical problem that the measurement deviation of the unmanned aerial vehicle pod laser ranging module is large is solved.

The present invention addresses the problem of providing a compact, lightweight, and inexpensive imaging device that has a wide angle of view. [Solution] A zoom lens comprising a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a third lens group arranged in this order from the object side to the image side, the second lens group including a plastic lens having a negative refractive power, and the zoom lens having specific optical characteristics expressed by a specific formula.

A zoom lens includes a plurality of lens units. Each distance between adjacent lens units changes during zooming. At least one of the plurality of lens units has a diffractive surface with controlled wavelength dispersion. A predetermined inequality is satisfied.

The invention discloses a cascade metasurface-based dual-function tunable optical device and a design method, and relates to the technical field of tunable metasurfaces. According to the optical device, high-refractive-index medium nano-columns with different sizes are arranged on an upper low-refractive-index medium substrate and a lower low-refractive-index medium substrate according to a specific mode to form a cascade metasurface structure, an upper metasurface and a lower metasurface included in the cascade metasurface have independent 2pi phase regulation and control capabilities under two kinds of orthogonal polarized light, and the two layers of metasurfaces have independent 2pi phase regulation and control capabilities under two kinds of orthogonal polarized light. Two wavefront regulation and control functions of polarization multiplexing can be realized; furthermore, the cascaded metasurface device adopts a mechanical tuning mode, and dynamic tuning of a double-wavefront regulation and control function can be realized by controlling relative horizontal displacement between the upper and lower layers of metasurfaces. Wherein the total phase of the cascaded metasurface is represented as a dynamic functional phase 1 under the polarization state 1, and is represented as a dynamic functional phase 2 under the polarization state 2. According to the invention, the double-layer structure design of the cascade metasurface is adopted, the total phase of the cascade metasurface is a dynamic deflection phase under X polarization by taking the functions of light beam dynamic scanning and a zoom lens as examples, and the displacement-related light beam deflection can be realized under different relative displacement conditions; and under Y polarization, a dynamic focusing phase is presented, and focal length adjustment along with relative displacement change can be realized. That is, the cascaded metasurface is an optical device which realizes dual-function dynamic tuning through horizontal displacement.

The invention relates to an optical lens, in particular to a refrigeration type medium-wave infrared continuous zoom lens suitable for a 1280 * 1024 detector, and aims to solve the problems that an existing medium-wave infrared continuous zoom lens is small in view field and difficult to meet the requirement of large-view-field search. The system comprises a front fixed group lens, a zoom group lens, a compensation group lens, a first rear fixed group lens, a second rear fixed group lens and a detector which are sequentially arranged along the propagation direction of incident light, the zoom group lens and the compensation group lens can move along the direction of an optical axis and are used for realizing continuous zoom imaging; the front fixed group lens comprises a first lens; the zoom group lens comprises a second lens and a third lens; the compensation group lens comprises a fourth lens and a fifth lens; the first rear fixed group lens comprises a sixth lens and a seventh lens; the second rear fixed group lens comprises an eighth lens, a ninth lens and a tenth lens. The invention has the advantages of large field of view and high imaging quality, and can meet the requirement of infrared target searching and tracking.

The invention relates to the technical field of lens focusing, and discloses a lens focusing method and device and a zoom lens. The method comprises the following steps: acquiring a focal length value and an aperture value of a zoom lens, and calculating a bending radius compensation amount of each radial region in an imaging surface; determining spatial position coordinates of each reflective interference area based on image data acquired by the zoom lens; generating a focusing state evaluation result based on the bending radius compensation amount and the spatial position coordinates; and generating a focusing control instruction according to the focusing state evaluation result and driving a focusing motor to move to a target position. According to the invention, the bending radius compensation amount of each radial area of the zoom lens under different focal lengths can be accurately calculated, the problem of out-of-focus of an edge area, which cannot be processed by a traditional focusing method, is effectively solved, and the full-view-field focusing consistency is improved.

The invention discloses an automatic zoom lens control system and method, and belongs to the technical field of semiconductor packaging test automation equipment. Wherein the lens module comprises a lens structure assembly and a motor structure assembly, the lens structure assembly comprises a lens, the motor structure assembly comprises a rotor, a coil and a stator, and the rotor, the coil and the lens are rigidly connected together and do axial movement at the same time; the control module comprises an industrial personal computer, a motion control card and a driver, the motion control card and the driver are in communication connection with the industrial personal computer, and the motion control card is used for executing motor motion planning and calculating the output quantity of the position loop improved two-order reduction linear active disturbance rejection controller. According to the automatic zoom lens control system and method, the lens is controlled to zoom automatically, clear images of chips with different heights on the weldment are obtained, and it is guaranteed that the zoom device is high in precision and high in automatic zoom speed while automatic zoom is achieved.

The invention discloses a teleconverter lens and an imaging system. The teleconverter lens comprises a first group, a second group and a third group which are sequentially arranged from an object plane to an image plane along an optical axis, the first group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens; the second group comprises a sixth lens, a seventh lens, an eighth lens and a ninth lens; the third group comprises a tenth lens, an eleventh lens, a twelfth lens and a thirteenth lens; wherein the first lens, the third lens, the sixth lens, the seventh lens, the ninth lens, the eleventh lens, the twelfth lens and the thirteenth lens are all positive focal power lenses; the second lens, the fourth lens, the fifth lens, the eighth lens and the tenth lens are negative focal power lenses. According to the technical scheme, the number of the lenses in the optical system and the focal power matching mode are reasonably set, so that the imaging effect of the optical system can be improved, and the high-definition multiplying effect is achieved.

The invention discloses a target detection system and method based on an image splicing technology, and relates to the field of optics, image processing and machine vision. Comprising a software system module, an edge computing terminal module, a zoom lens and camera combination module, a lifting and rotating combination module, a light source module and an object placement module, the zoom lens module and the camera module are controlled by the edge computing terminal module to shoot an object in real time, and a corresponding shooting scheme is formulated according to a detected industrial object. A detected object is comprehensively shot according to the shooting angle, the focal length, the shooting position and the distance, incomplete collection of industrial object data is prevented, then the edge computing terminal carries out panoramic image splicing on images shot by a camera in real time through a panoramic image splicing module in a control software system module, and the panoramic image splicing module carries out panoramic image splicing. And finally, a target detection module in the software system module performs target detection on the panoramic image, namely, a target position and a target category are detected, so that the target detection efficiency is remarkably improved, and the capability of obtaining the full view of the object is improved.

The invention discloses a non-contact polarization image measuring device and method for a large-size PBX curing process. The non-contact polarization image measuring device comprises a three-dimensional sample table, a diaphragm, a zoom lens, a micro-polarization array and a detector which are arranged along a light path direction, a sample to be tested is placed on the three-dimensional sample table, and the center of the sample to be tested coincides with the center of the three-dimensional sample table; the diaphragm realizes normalization processing of emergent light energy by regulating and controlling the intensity of reflected light on the surface of the sample; the zoom lens collects normalized emergent light to the surface of the micro-polarization array, and is adjusted and matched with the z-axis of the three-dimensional sample table to realize scanning imaging of a to-be-detected sample in the depth direction; the detector acquires a linear polarization image. According to the method, the PBX is measured through non-contact polarization, high-precision characterization analysis of the PBX curing process is completed by calculating key parameter (polarization angle and polarization degree) changes caused by curing, and the problems of pollution, large error and high danger of a sample in traditional contact measurement are solved.

The invention relates to the field of power transmission line inspection, and discloses a laser-assisted focusing system of a power transmission line inspection camera, and the system comprises a laser ranging module, a visual sensor, a main control module, a target analysis module and a strategy optimization module, and the laser ranging module measures the distance between a target part on a power transmission line and a high-speed zoom lens in real time; the vision sensor synchronously collects definition characteristic data of a target part, and the main control module fuses the two types of data to generate an initial focusing parameter matrix and controls the high-speed zoom lens to adjust the focal length; the target analysis module determines a focusing strategy instruction based on the current detection task and a target priority database; the strategy optimization module corrects the initial parameter matrix according to the instruction, generates an optimized parameter matrix and feeds back the optimized parameter matrix to the main control module; the system improves the accuracy, pertinence and efficiency of focusing in a complex environment through the cooperation of multiple modules, and is suitable for the intelligent inspection work of a power transmission line.

The invention relates to the technical field of optical imaging systems, and discloses a projection zoom optical system, which sequentially comprises a light valve, a prism group, an image bias lens, a first group lens, a second group lens, a third group lens, a fourth group lens, a fifth group lens and a sixth group lens from an image source side to a projection side along an optical axis, the first group lens is composed of a first lens with positive focal power, the second group lens is composed of a second lens with positive focal power, a third lens with positive focal power, a fourth lens with negative focal power and a fifth lens with positive focal power, the third group lens is composed of a diaphragm and a sixth lens with positive focal power, and the fourth group lens is composed of a seventh lens with positive focal power. The fifth group lens is composed of an eighth lens with positive focal power and a ninth lens with negative focal power, and the sixth group lens is composed of a tenth lens with negative focal power and an eleventh lens with negative focal power, so that the performance of the zoom lens can be improved at lower cost and lower complexity; and meanwhile, the quality and definition of a projected image can be improved.

Provided is a zoom lens that has a large aperture ratio, has a suppressed total length, has a small center of gravity movement during zooming or focusing, and can perform quiet auto focus, and that is suitable for video capturing. A zoom lens has, in order from an object side: a first lens group G1 having a negative refractive power; a middle lens group GM having a positive refractive power as a whole; a rear lens group GR; and a final lens group GN. The middle lens group GM includes three or more lens groups and includes a focus lens group that moves along an optical axis during focusing from infinity to a short distance. The rear lens group GR includes one or more lens groups. A distance between each of the groups changes during zooming from a wide-angle end to a telephoto end.

The present disclosure provides a zoom projection lens and an electronic device. The zoom projection lens includes: a first zoom lens group, a second zoom lens group, a compensation lens group, and a fixed lens group, sequentially along an optical axis direction from a zoom-in side to a zoom-out side; the first zoom lens group has a positive focal power, the second zoom lens group has a negative focal power, the compensation lens group has a positive focal power, and the fixed lens group has a positive focal power; and the first zoom lens group, the second zoom lens group, and the compensation lens group are movable along the optical axis.

The invention discloses a monitoring system and a concrete carbonization degree monitoring method based on the monitoring system, relates to the technical field of concrete carbonization monitoring, and mainly aims to realize continuous nondestructive monitoring of the concrete carbonization degree. According to the main technical scheme, an execution probe is moved to the surface of a measurement point through a three-dimensional positioning unit; adjusting a laser focus to a preset depth by using an electric zoom lens group; emitting pulse laser to the depth; the sound wave signal acquisition unit acquires plasma sound wave signal waveform data, and the spectral signal acquisition unit acquires spectral data; the synchronous acquisition and processing unit extracts an input feature vector according to the sound wave signal waveform data and the spectral data and inputs the input feature vector into an alkalinity prediction model to obtain a corresponding pH value; adjusting the laser focus to different depths, and repeating the steps; and finally, generating a carbonization degree monitoring result based on the multi-depth pH values.

A head-mounted display device and an adjustment module are provided. The head-mounted display device includes a body and two adjustment modules. The two adjustment modules are configured to be assembled to two zoom lens groups of the body. Each of the adjustment modules includes a base, a sliding block, a first shape memory alloy (SMA) element, a first recovery element, a braking element, a second SMA element, and a second recovery element. The first SMA element is connected between the base and an actuating end of the sliding block and is configured to actuate the sliding block so that a transmission end of the sliding block drives the zoom lens group to zoom. The first recovery element is connected between the base and the actuating end and is configured to keep the sliding block at an original position when the first SMA element is in a power-off state. The braking element is engaged with a braking end of the sliding block when the braking element is in a braking position. The braking element is separated from the braking end when the braking element is in a movable position. The second SMA element is connected between the base and the braking element and is configured to actuate the braking element to move between the braking position and the movable position. The second recovery element is connected between the base and the braking element and is configured to keep the braking element at the braking position or the movable position when the second SMA element is in the power-off state.

To provide a zoom lens that has a large aperture and high optical performance despite its small size and wide angle.SOLUTION: A zoom lens has a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a rear group, which are arranged in order from an object side to an image side, and an interval between the adjacent lens groups changes in zooming. The first lens group includes at least one resin lens having a negative refractive power, and at least one of the second lens group and the rear group includes at least one resin lens having a positive refractive power. A focal length of the first lens group, a focal length of the second lens group, an average of the focal lengths of the resin lenses having a negative refractive power included in the first lens group, and an average of the focal lengths of the resin lenses having a positive refractive power included in at least one of the second lens group and the rear group are each appropriately set.SELECTED DRAWING: Figure 1

The zoom lens according to the present invention is configured from, in order from the object side, a first lens group having a negative refractive power, an intermediate lens group having a positive refractive power as a whole, a rear lens group, and a final lens group, and is characterized in that: the intermediate lens group is composed of three or more lens groups; the rear-side lens group is composed of one or more lens groups, the interval between the lens groups changes when magnification is varied from the wide-angle end to the telephoto end, the intermediate lens group moves toward the object side, the interval between the intermediate lens group and the rear-side lens group widens, and the distance between the intermediate lens group and the rear-side lens group changes when magnification is varied from the wide-angle end to the telephoto end. The first lens group and the final lens group are fixed in both zooming and focusing.

The present invention relates to a zoom lens, specifically to a high-performance long focal length continuous zoom lens, which solves the technical problems of complex mechanical structure and high processing difficulty of existing zoom lenses. The continuous zoom lens provided by the present invention includes a front fixed group, a zoom group, a compensation group, and a rear fixed group arranged in sequence from the object side to the image side. The rear fixed group includes a rear fixed group I, a rear fixed group II, and a rear fixed group III arranged in sequence from the object side to the image side. Among them, the zoom group makes a linear motion between the front fixed group and the compensation group to achieve zooming, and the compensation group makes a non-linear motion between the zoom group and the rear fixed group to compensate for the change in the axial position of the image plane during the zooming process. The present invention adopts a 6-group 20-lens structure, and the lenses used in each lens group are all spherical mirrors, which has good processability. The zoom group makes a linear motion to achieve zooming, the compensation group makes a non-linear motion to achieve image plane stability, with a large magnification, a large field of view, low distortion, and good imaging quality.

A zoom lens according to the present disclosure includes a front-side lens group, an intermediate lens group, and a rear-side lens group. The intermediate lens group includes a diaphragm. The front-side lens group includes: a first positive lens group that is fixed during zooming and has a positive refractive power; one or more negative lens groups that move during zooming and each have a negative refractive power; and one or more second positive lens groups that move during zooming and each have a positive refractive power. Among the negative lens groups, a lens group having the strongest negative refractive power moves at the time of zooming such that an interval thereof from the first positive lens group is maximum at the telephoto end. The lens group having the strongest positive refractive power among the second positive lenses is disposed closer to the image plane than the lens group having the strongest negative refractive power among the negative lens groups. The lens group having the strongest positive refractive power moves at the time of zooming such that an interval from the lens group having the strongest negative refractive power is minimum at the telephoto end.

The invention discloses a zoom lens with a telescopic structure and a zoom method, and belongs to the technical field of lenses, the zoom lens comprises a fixed barrel, a zoom hand wheel arranged outside the fixed barrel, a front group lens barrel, a power barrel, a zoom group lens barrel and a compensation group lens barrel, the front group lens barrel, the zoom group lens barrel and the compensation group lens barrel are arranged inside the fixed barrel, and the front group lens barrel, the zoom group lens barrel and the compensation group lens barrel are sequentially arranged along the optical axis direction; the front group lens cone is provided with a bulge, the fixed cylinder is provided with a straight groove, and the bulge of the front group lens cone is limited in the straight groove of the fixed cylinder, so that the front group lens cone does linear motion along the optical axis direction. According to the invention, an optical structure adopting four lenses, namely the front group, the zooming group, the compensation group and the focusing group, is provided, the number of the optical structure is smaller than that of a traditional structure with five lenses, through a unique telescopic mechanical structure, the lens is in a storage state when not used, the lenses are close to one another, the size is minimum, and the portability is greatly improved.

1. The name of the design product: zoom lens. 2. The use of the design product: for adjusting the distance of the eyes to the object. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.