1311 results about "Zoom lens" patented technology

The embodiment of the invention provides an optical system, intelligent head-mounted equipment and a zooming method of the optical system. The optical system is used for the intelligent head-mounted device, and the optical system comprises an imaging module, an eyeball tracking module and a processor. The imaging module comprises a zoom lens, and the eyeball tracking module is used for acquiring eyeball watching information; the processor is used for determining zoom information according to eyeball watching information provided by the eyeball tracking module and controlling the zoom lens to zoom according to the zoom information; wherein the zoom information comprises the thickness and the curvature radius of the zoom lens.

The zoom lens comprises a focusing lens group, a zoom lens group and a fixed lens group which are sequentially arranged from an object plane to an image plane along an optical axis, the focusing lens group has negative focal power, the zoom lens group has positive focal power, and the fixed lens group has positive focal power. The focusing lens group comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from an object plane to an image plane; the zoom lens group comprises a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens which are sequentially arranged from the object plane to the image plane; the fixed lens group includes a tenth lens. According to the zoom lens provided by the embodiment of the invention, a three-component structure is adopted, ten lenses are used, the number of the lenses in the three lens groups is set, and the focal power matching of the three lens groups and the ten lenses is further limited, so that the high-image-quality zoom lens which is small in size, large in aperture, infrared and confocal at high and low temperatures is realized, and the zoom lens can be matched with a 1 / 1.8 ''chip for use.

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 invention discloses an intelligent monitoring method and device for a video monitoring system based on cloud edge collaboration, and relates to a video monitoring technology. An edge computing platform is deployed on one side of the video monitoring system, so that the computing load of a central cloud platform is reduced; through combination of video fault data, historical operation data and real-time operation data, a correlation index between a picture parameter and a video fault type is calculated so as to accurately determine a video picture fault reason. Constructing a panoramic canvas through equipment parameters, and constructing a panoramic background model based on historical operation data; the real-time operation data and the panoramic background model are combined to continuously monitor faults of the holder and the zoom lens, and monitoring blind areas or picture loss caused by faults of the video monitoring system are avoided; the fault evaluation platform receives the detected suspected fault data and suspected fault indexes and feeds back the suspected fault data and suspected fault indexes to the fault alarm system in time, corresponding processing measures are taken, and the reliability of the monitoring camera system can be ensured.

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 all-in-one eyeball comprehensive parameter measuring instrument and a method for measuring eyeball parameters by using the same. The measuring instrument comprises a signal light source, a signal light source sample arm, a signal light source reference arm, a scale light source, a scale light source sample arm, a scale light source reference arm, an annular light source, a telecentric lens, a zoom lens group and the like, the instrument can measure biological parameter information of human eyes, corneal curvature and eyeball diopter at the same time. The device is scientific and reasonable in design, and has the advantage that the curvature, the diopter and the biological parameters of the human eyes can be simultaneously measured at one time under the non-contact and non-invasive conditions.

The zoom lens comprises a first fixed lens group, a first zoom lens group, a diaphragm, a second zoom lens group, a focusing lens group and a second fixed lens group which are sequentially arranged from an object space to an image space along an optical axis, and the focal powers are positive, negative, positive and negative in sequence; wherein the first fixed lens group comprises three lenses, and the focal powers of the three lenses are negative, positive and positive in sequence; the first zoom lens group comprises three lenses with negative focal power, negative focal power and positive focal power in sequence; the second zoom lens group comprises four lenses, and the focal powers of the four lenses are negative, positive, positive and negative in sequence; the focusing lens group comprises three lenses, and the focal powers of the three lenses are positive, positive and negative in sequence; the second fixed lens group comprises a lens, and the focal power is positive. According to the embodiment of the invention, the 14 lenses and the plate glass with a certain thickness are used, and the use requirements of small distortion, large aperture and clear imaging under the wave band of 436-656 nm can be met under the condition of adapting to a 1 / 1.2 ''target surface.

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 present application provides a zoom lens and an electrical device, the zoom lens includes: lens piece set including a first optical lens piece; a lens piece bracket including a bracket main body, where in a first optical lens piece is disposed securely on the bracket main body; a lens barrel sleeved around the lens piece bracket, wherein sliding slots are defined in the lens barrel, an included angle between an extension direction of the sliding slots and a plane in which the lens piece set is located is an acute angle or obtuse angle; a focusing ring sleeved around the lens barrel, wherein guide slots are defined in the focusing ring, and an extension direction of the guide slots is perpendicular to the plane in which the lens piece set is located.

The invention discloses a zoom lens which comprises a first fixed lens group with positive focal power, a zoom lens group with negative focal power, a diaphragm, a second fixed lens group with positive focal power, a focusing lens group with positive focal power, a third fixed lens group with positive focal power and plate glass which are sequentially arranged from an object space to an image space along an optical axis, the first fixed lens group sequentially comprises a negative lens, a positive lens and a positive lens; the zoom lens group sequentially comprises a negative lens, a negative lens and a positive lens; the second fixed lens group sequentially comprises a positive lens, a negative lens, a positive lens, a negative lens, a positive lens, a negative lens and a positive lens, the front three lenses comprise at least two doublet lenses, and the rear three lenses comprise at least two doublet lenses; the focusing lens group comprises a positive lens; the third fixed lens group includes a lens having a focal power. The lens has the advantages of being large in aperture, small in distortion, long in focal length and high in imaging definition, and can meet the use requirements under the 1 / 1.2 ''target surface and the wave band of 436-850 nm.

The utility model discloses a large-magnification continuous zooming fog-penetrating lens, which comprises a front fixed lens group, a zooming lens group, a compensating lens group, a rear fixed lens group, a temperature focusing lens group and an optical filter switcher which are sequentially arranged along the light incidence direction, and is characterized in that the front fixed lens group comprises a first lens and a first gluing group; the zoom lens group comprises a fifth lens and a second gluing group, the compensation lens group comprises an eighth lens and a third gluing group, the rear fixed lens group comprises a fourth gluing group, a fifth gluing group and a fifteenth lens, and the temperature focusing lens group comprises a sixth gluing group. The optical filter switcher comprises an optical filter and an anti-reflection sheet and is used for switching the optical filter and the anti-reflection sheet in the direction perpendicular to the optical axis. By reasonably setting the parameters of each lens and the overall mechanical structure of the lens, electric four-variable functions of focal length, resolving power compensation, aperture and fog penetration are realized, the stability is good, the response speed is high, stray light ghosting can be reduced, chromatic aberration can be corrected, the imaging quality can be improved, the service life can be prolonged, and miniaturization and light weight are facilitated.

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.

A camera system includes a camera body, a lens barrel that is mounted to the camera body and includes at least one movable lens, and a zoom ring drive device that is mounted to the camera body. A first control unit of the camera body controls a second control unit of the lens barrel and a third control unit of the zoom ring drive device so as to move a zoom lens with a DC motor on the basis of information about the characteristic of the zoom lens and an optical characteristic value inputted to an input unit.

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.

A personal planetarium projection system is provided. The system may comprise a light source, a removable star disc comprising a transparent star and planet pattern, and a focus lens mechanism for focusing the light source through the star disc. The system may also comprise an optical zoom lens for projecting light passing through the star disc onto a projection surface to produce a projected image. The zoom lens enables different magnifications of the projected image.

The invention provides an automatic focusing method of an imaging device and an exterior mirror system. The method comprises the following steps: acquiring a working distance between a zoom lens and an imaging target through a distance detection module; determining a focusing search range of the zoom lens according to the working distance, and determining an image acquisition step length according to the working distance and the current focusing definition; and adjusting the zoom lens according to the image acquisition step length, and searching a focusing position in the focusing search range. The working distance between the lens and the imaging target is measured through the distance detection module, the focusing search range is preliminarily locked, invalid focusing outside the focusing search range is avoided, and the focusing efficiency is improved; and the working distance is also used for setting a proper image step length in combination with the current focusing definition, so that the focusing process can cover the peak position of the image definition, the focusing success rate under the conditions of relatively shallow depth of field, relatively high image contrast curve kurtosis and the like is improved, and the situation that the automatic focusing efficiency is limited due to too small step length is avoided.

To prevent the occurrence of aberration fluctuations and offset aperture along with zooming in a small-size, light-weight zoom lens.SOLUTION: A zoom lens consists of: a front group comprising a positive first lens group, a negative second lens group, a negative third lens group, and a fourth lens group having positive or negative refractive power; and a rear group comprising an aperture stop and a plurality of lens groups. The first lens group and a fifth lens group on the most object side in the rear group do not move, and the second, third, and fourth lens groups move in zooming. The rear group includes a focus lens group that moves in focusing. The focal length fFw of the front group at the wide-angle end, and the focal length fw of the zoom lens at the wide-angle end satisfy the condition of -3≤fFw / fw<0.SELECTED DRAWING: Figure 1

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 high-speed engine blade deformation measurement system and measurement method for wind tunnel test belong to the technical field of full-surface deformation measurement of engine blades. In order to realize the full-surface deformation measurement of blades, the present invention includes a first imaging device and a second imaging device connected to a digital pulse signal delay generator and a computer respectively, the digital pulse signal delay generator is connected to a laser, the laser is connected to a beam expander, the beam expander is connected to an optical fiber image transmission bundle, and the optical fiber image transmission bundle is connected to a zoom lens; the beam expander, the optical fiber image transmission bundle, and the zoom lens constitute a laser homogenization device, and the laser emitted by the zoom lens is irradiated onto the blades and the fairing; the first imaging device and the second imaging device are aligned with the position where the laser irradiates the high-speed engine blades to shoot. The present invention significantly improves the measurement accuracy and the comprehensiveness of the data, and improves the overall performance and reliability of the engine.

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.

To provide a small-sized zoom lens having high optical performance in an infrared band.SOLUTION: The zoom lens consists of, in order from an object side to an image side, a first optical system having a first lens group of a positive refractive power, a second lens group of a negative refractive power, a third lens group of a positive refractive power, and a fourth lens group of a negative refractive power and a second optical system having a fifth lens group of a positive refractive power. In the first optical system, an intermediate image is formed between the first optical system and the second optical system. A distance between adjacent lens groups included in the first optical system changes for zooming. D=|ft| / Fno defined by a focal distance ft and an F value Fno of the entire system at a telephoto end, focal distances of the first and second lens groups, and a length L on an optical axis from an optical surface closest to an object to an image surface of the first lens group are appropriately set.SELECTED DRAWING: Figure 1

To provide a zoom lens that has a high variable power ratio and high optical performance and is capable of incorporating an electrically-driven zoom function.SOLUTION: A zoom lens comprises, in order from an object side to an image side, a first lens group L1 having negative refractive power, a second lens group L2, an intermediate group LM having one or more lens groups, and a final lens group LN. The zoom lens is configured such that respective intervals between adjacent lens groups change during zooming. The first lens group L1 includes two or more lenses. The intermediate group LM includes a first intermediate lens group Lm1 and a second intermediate lens group Lm2 disposed adjacently to the image side of the first intermediate lens group Lm1. The first lens group L1 and the first intermediate lens group Lm1 are immobile during zooming. A distance on the optical axis from the surface apex of the lens surface on the most object side of the first lens group L1 to the surface apex of the lens surface on the most image side of the first lens group L1 or the like is appropriately set.SELECTED DRAWING: Figure 1

The invention discloses a camera focusing system and focusing method for a box girder inspection robot, and the system comprises a distance measuring sensor, a zoom lens, a focusing control module, and an image sensor, the distance measuring sensor is used for measuring the distance information from a camera to a target; the focusing control module is used for calculating a pre-focusing position according to the distance information and the lens parameters and driving the zoom lens to move to the pre-focusing position through a motor; the image sensor is used for capturing an image and supporting an automatic focusing algorithm based on contrast or phase detection; the focusing control module determines the direction and size of a focusing error based on phase detection pixels of the captured image so as to optimize a focusing position; or, by evaluating the contrast ratio in the captured image, when the contrast ratio is maximum, it is determined that the image is the optimal focusing position. The distance sensor is combined for distance measurement, the focal length of the camera is quickly adjusted according to the measurement result, and the image definition is ensured.

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.