730 results about "Zoom lens" patented technology

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.

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.

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 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 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 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 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.

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 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.

The application provides a continuous zoom optical system and a stereomicroscope for the stereomicroscope, and the optical lens unit comprises, in sequence along a main optical axis, an upper fixed lens group, a compensation lens group, a middle fixed lens group, a zoom lens group and a lower fixed lens group; a variable diaphragm is arranged between the middle fixed lens group and the zoom lens group along the main optical axis; the upper fixed lens group, the compensation lens group, the zoom lens group and the lower fixed lens group are all configured as double lens combinations, the focal length values of the upper fixed lens group and the zoom lens group are negative, and the focal length values of the compensation lens group and the lower fixed lens group are positive; the middle fixed lens group is configured as a double-concave single lens; the compensation lens group and the zoom lens group are axially moved along the main optical axis based on a first zoom fitting curve and a second zoom fitting curve respectively; and the advantages are that the system has smooth magnification, suppresses vignetting phenomenon, and dynamically adjusts the numerical aperture, the depth of field and the light throughput to adapt to different scene requirements.

The utility model discloses a continuous zoom lens and an adjustable objective lens used for the continuous zoom lens. An adjustable fixing assembly of the adjustable objective lens is arranged on a continuous zoom lens body in a sleeving mode, and the adjustable objective lens and the continuous zoom lens body are fixed; the adjustable fixing assembly comprises a guide nail, an inner shell and an outer shell, the first end of the guide nail sequentially penetrates through a limiting groove in the side wall of the inner shell and a first positioning hole of the objective lens group, and the second end of the guide nail is arranged in a spiral groove in the side wall of the outer shell; when the shell rotates, the shell drives the objective lens group to move along the extending direction of the spiral groove and the limiting groove through the guide nail so as to adjust the interval between the objective lens group and the continuous zoom lens main body. Through cooperative arrangement of the outer shell, the inner shell and the guide nail, the outer shell is rotated to drive the objective lens group to move so as to adjust the interval between the objective lens group and the continuous zoom lens main body, so that the continuous zoom lens assembled with the adjustable objective lens has an adjustable working detection distance and is adaptive to detected samples with different heights.

This invention relates to the field of optics, specifically to a zoom lens and imaging device. The zoom lens, from the object plane side to the image plane side, consists of a first fixed lens group with positive optical power, a zoom lens group, an aperture stop, a second fixed lens group, a focusing lens group, and an auxiliary lens group. The zoom lens group and the focusing lens group move along the principal optical axis of the zoom lens. The first fixed lens group, from the object plane side to the image plane side, consists of a first fixed lens with negative optical power, a second fixed lens with negative optical power, a third fixed lens with positive optical power, and a fourth fixed lens with positive optical power. The zoom lens satisfies the following conditions: XG2 / ft > 0.5; ft / fw < 5; DG12max / DG35 > 1.8. This invention achieves a zoom lens that, while miniaturizing, improves the volume of the front lens group and the range of motion of the zoom lens group to a certain extent, increasing the zoom capability and resolving power of the zoom lens.

The present technology comprises a single-aperture snapshot multi-spectral imaging device generally consisting of at least a color camera, a customized Octa-Band optical filter, a motorized zoom lens, and an 8-wavelength multi-color LED illumination system. The present technology also comprises a method about designing time sequences and combinations of LED illuminations, along with an unmixing algorithm for 8 MSI images generation. According to the present device and method, it is capable of fast multi-spectral image acquisition speed (<100 milliseconds), fast post-processing speed based on adopting a single aperture system without disparity correction calculation, adjustable FOVs, smaller form factors and lower costs, and high precision of spectral information.

To reduce the size and weight of a lens group to be driven in a zoom lens.SOLUTION: The zoom lens L0 includes a negative first lens group, a positive intermediate group, and a negative subsequent group, and the intermediate group includes positive first and second intermediate lens groups. During zooming, the first lens unit is configured not to move, and the first and second intermediate lens units are configured to move. The first lens group includes two or more lenses. Where mp1 and mp2 are amounts of movement of the first and second intermediate lens units during zooming from the wide-angle end to the telephoto end, fp1 and fp2 are focal lengths of the first and second intermediate lens units, fw and ft are focal lengths of the zoom lens at the wide-angle end and the telephoto end, and TTLw is a sum of a distance from a lens surface closest to the object side to a lens surface closest to the image side at the wide-angle end and a distance from the lens surface closest to the image side to the image plane. 0.10 ≤ mp2 / mp1 ≤ 0.82, 1.23 ≤ fp2 / fp1 ≤ 10.00, 1.50 ≤ ft / fw ≤ 6.00, and 0.10 ≤ TTLw / fw ≤ 10.00 are satisfied.SELECTED DRAWING: Figure 1

The utility model relates to a large-target-surface long-focal-length two-variable high-definition zoom lens, which comprises a lens, and an optical system of the lens comprises a front fixed lens group, a zoom lens group, a compensating lens group and a rear fixed lens group which are sequentially arranged from left to right along a light incidence direction. According to the utility model, the design is reasonable, a continuous zoom closed-loop control function, a focusing closed-loop control function, a focal length feedback function and an image output function are realized, large-range searching and tracking camera shooting can be carried out on targets with far and near distances and high-speed movement, and the system is applied to scenes with requirements such as unmanned monitoring, early warning, marginal and coast defense and the like.

A variable lens includes a first substrate that is light transmissive, a first liquid, a movable film that is in contact with the first liquid and is light transmissive and elastically deformable, a second liquid that is in contact with the movable film, and a second substrate that is light transmissive, the components described above sequentially arranged in the direction in which the beam passes along the optical axis. The first and second liquids differ from each other in terms of refractive index. In the variable lens, the pressures of the first and second liquids are adjusted to cause the movable film to curve in the direction along the optical axis. At least one of the first and second substrates has power as a lens.

The application provides a long-focus short-wave continuous zoom lens, relates to the technical field of optical imaging, and comprises, in sequence from an object plane to an image plane along a light incidence direction, a front fixed group with positive refractive power, a variable magnification group with negative refractive power, a compensation group with positive refractive power, a diaphragm, and a rear fixed group with positive refractive power; the variable magnification group and the compensation group can move axially along an optical axis. The lens has a focal length variation range of 71.5mm~500mm, a zoom ratio of 7 times, and an image plane diagonal line of 11mm. The structure of the variable magnification group and the compensation group is beneficial to reducing the length of the optical system and making the structure compact. Meanwhile, the rear intercept is relatively long, which is beneficial to the folding of the light path and the splicing between different systems.

A zoom lens comprises a first lens unit having positive refractive power, a second lens unit having negative refractive power, and a rear lens group including one or more lens units. The first lens unit, the second lens unit, the rear lens group are arranged in order from an object side to an image side. Intervals between adjacent lens units change during zooming. The first lens unit is configured to move toward the object side during zooming from a wide angle end to a telephoto end. The second lens unit includes three or more lenses. The zoom lens satisfies predetermined inequalities.

The application discloses a power transmission line sag identification and early warning method and device combined with zoom ranging, relates to the technical field of power transmission line monitoring, and comprises the following steps: installing a binocular camera system in a target identification scene, adjusting variable focus lens parameters, calibrating the binocular camera system by using a checkerboard, and constructing a disparity-depth mapping relationship; collecting Q times of synchronous images by using the calibrated system, performing multi-point disparity analysis, obtaining disparity analysis results of a first suspension point, a second suspension point and a sag lowest point, and screening and determining target suspension point and sag lowest point analysis results; taking the results as indexes, searching the disparity-depth mapping relationship, and obtaining depth information; calculating target suspension point ranging results according to the depth information, calculating a sag value and judging whether the sag value exceeds a threshold value, and if not, triggering early warning, so as to solve the technical problem that a traditional ranging mode cannot feed back sag changes in real time, and thus cannot effectively early warn safety hazards caused by excessively large sag.

A zoom lens includes a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and two or more additional lens units. In zooming, the first lens unit moves, and an interval between adjacent lens units changes. The refractive index of a negative lens A disposed on a most object side of negative lenses included in the first lens unit is higher than or equal to 1.89, and the negative lens A and a lens B disposed adjacent to an image side of the negative lens A satisfy a predetermined relationship.

The invention discloses an air floating type rotary scanning measuring head device, which comprises an air floating main shaft, a measuring rod, a torque motor, a circular grating, a reading head, a photoelectric slip ring and a zoom lens, a rotor of the photoelectric slip ring is connected with the zoom lens, the zoom lens is connected with the circular grating, the torque motor is connected between the circular grating and the air floating main shaft, the torque motor is connected with a core shaft of the air floating main shaft through a rotor rotating shaft, and the measuring rod is connected with the core shaft and is supported by the core shaft; the torque motor is used for driving the measuring rod to rotate, the circular grating is fixedly connected with a rotor of the torque motor, and the reading head reads a rotation angle; the photoelectric slip ring is used for accessing a measuring light beam, emergent light of the photoelectric slip ring enters the zoom lens, and the zoom lens adjusts the curvature of the lens by changing voltage, so that the adjustment of the focal length is realized; a reflecting mirror is arranged in the tail end of the measuring rod and used for emitting a measuring light beam from a side window at the tail end to scan the inner contour side wall. The device is high in measurement precision, high in speed, non-contact, high in adaptability and capable of improving the level of inner contour rotation scanning measurement.

The application discloses a zoom lens and a monitoring camera equipment, the zoom lens comprises a shell and a lens group, the lens group comprises a first lens group with positive refractive power, a second lens group with negative refractive power, a third lens group with positive refractive power, a fourth lens group with positive refractive power and a fifth lens group with negative refractive power arranged in sequence from the object side to the image side, the first lens group and the fifth lens group are fixedly installed on the shell, and the second lens group, the third lens group and the fourth lens group are movably installed on the shell along the optical axis direction, in the technical scheme, the reasonable setting of the five lens groups and the conditional restriction of the wide-angle end focal length of the zoom lens and the focal length ratio of each lens group can solve the technical problem that the existing zoom lens cannot coexist with low cost, small caliber, wide angle, small distortion and large zooming.

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.

This invention provides a zoom lens system for lens defect detection, ranging from wide-angle to dual telecentric zoom, belonging to the field of machine vision measurement technology. It solves the technical problems of low efficiency and high cost associated with manual visual inspection of defects. The zoom lens system includes a front fixed group, a zoom group, a compensation group, and a rear fixed group arranged along the optical axis. The zoom group and the compensation group are linked. By synchronously moving away from or towards each other, the zoom lens system can transform from a large field-of-view image-side telecentric system to an object-image-side dual telecentric system. This invention is used for online real-time lens defect detection. By combining the front fixed group and the zoom image-side telecentric system, it changes the object-side field of view, allowing for lens defect detection at different magnifications and fields of view, comprehensively improving lens detection efficiency and ensuring detection accuracy.

To provide a zoom lens capable of reducing the occurrence of ghost while having high optical performance.SOLUTION: The zoom lens L0 includes a first lens unit L1 having a negative refractive power, a second lens unit L2 having a positive refractive power, and two or more lens units. During zooming, the first lens unit L1 moves, and an interval between adjacent lens units changes. A refractive power of a negative lens A arranged closest to the object side among the negative lenses included in the first lens group L1 is 1.89 or more, and the negative lens A and a lens B arranged adjacent to the image side of the negative lens A satisfy a predetermined relationship.SELECTED DRAWING: Figure 1

This invention discloses a 22.5mm-102mm long-wave infrared continuous zoom lens, comprising a front fixed group, a zoom group, a compensation group, and a focusing group arranged sequentially along the transmission direction of the incident beam; each of the front fixed group, zoom group, compensation group, and focusing group has a lens; the front fixed group is a meniscus lens with positive optical power, the first object-side surface is convex, and the first image-side surface is concave; the zoom group is a meniscus lens with negative optical power, the second object-side surface is convex, and the second image-side surface is concave; the compensation group is a meniscus lens with positive optical power, the third object-side surface is convex, the third image-side surface is concave, and the second image-side surface is concave; the focusing group is a meniscus lens with positive optical power, the fourth object-side surface is convex, and the fourth image-side surface is concave; and satisfies 0.3 / mm < TTL / ImgH / f < 1.8 / mm and 1.00 < FNO < 1.25. The present invention provides a 22.5mm-102mm long-wave infrared continuous zoom lens with high pixel resolution and adaptability to outdoor environments.

A zoom lens includes, in order from an object side to an image side, a first lens unit with negative refractive power, a second lens unit, one or more intermediate lens units, and a rear lens unit. At least the second lens unit and the one or more intermediate lens units move during zooming. Each distance between adjacent lens units changes. The one or more intermediate lens units include an N-th intermediate lens unit disposed closest to an image plane, and the N-th intermediate lens unit includes a shift unit with positive refractive power disposed closest to the image plane and movable in a direction orthogonal to an optical axis of the zoom lens.