131 results about "Zoom lens" patented technology

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 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, 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.

1. Name of the designed product: zoom lens (2). 2. Use of the designed product: mounted on a spectacle frame or similar device, used for magnifying the operating site during oral or medical operation. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The utility model provides a kind of monitoring adjustment switching device, first optical lens in first camera, second optical lens in second camera, third optical lens in third camera are all wide-angle lens, fourth optical lens in fourth camera is optical zoom lens, and the collection angle or collection mode of first optical lens, second optical lens, third optical lens, fourth optical lens is different;The lens switching control data output end of control unit is connected with the lens switching control data input end of switching unit, the image data output end of first camera, second camera, third camera, fourth camera is respectively connected with the image data input end of switching unit, the image data output end of switching unit is connected with the image data input end of control unit, can be flexibly switched between first camera, second camera, third camera, fourth camera, reduce monitoring use energy consumption cost.

The application discloses a dual-eye zoom lens and a vehicle lamp with the same, the dual-eye zoom lens comprising: a zoom projection light path and a DMD microlens, the zoom projection light path being arranged in the light emitting direction of the DMD microlens, the zoom projection light path comprising: a right-angle prism and an imaging lens group; the right-angle prism is used for receiving the light rays of the DMD microlens and adjusting the light ray path; the imaging lens group is arranged in the light emitting direction of the right-angle prism, the imaging lens group comprising a positive focal length lens group, a negative focal length lens group and a zoom lens group, the focal length of the zoom lens group being positive, the positive focal length lens group, the negative focal length lens group and the zoom lens group being sequentially arranged in the light emitting direction of the right-angle prism to form a positive-negative-positive Cooke lens structure. The application has the advantages of realizing the customization requirement of zooming and reducing the production difficulty.

The invention provides electronic equipment, a zoom lens and a camera module, relates to the field of optical lenses, and aims to reduce the quality and cost of the zoom lens, improve the imaging quality of the zoom lens and obtain the zoom lens with low cost, light weight and high imaging quality. The electronic equipment comprises an image processor and a camera module which are in communication connection with each other. The camera module comprises a zoom lens, the zoom lens comprises a first lens group arranged close to the object side, and the first lens group comprises a first lens; the first lens is made of a first high-molecular compound material; the first lens group further comprises a second lens, the second lens is made of a second high-molecular compound material, and the refractive power of the second lens is opposite to that of the first lens.

This application discloses a high-precision error compensation method for the optical axis of a continuous zoom lens, relating to the field of lens inspection. The continuous zoom system is disassembled into independent components and mounted on a rotating stage centering fixture. Static center offset data for each component is calculated by rotating and acquiring the image point trajectory circle. Sampling parameters are set according to the zoom ratio of the continuous zoom system and the movement speed of each component along the optical axis during zooming, while simultaneously acquiring dynamic optical axis offset data of the components. A nonlinear mapping relationship is constructed between the static center offset data and the dynamic optical axis offset data, and a center offset-optical axis error coupling model is established. Based on the deviation compensation amount, the actuator is driven to adjust the position and / or angle of the components, and the optical axis accuracy index is verified after compensation. This solution achieves deep coupling between static and dynamic data, improving the accuracy of error tracing and the specificity of compensation; ensuring coverage of key error locations during zooming; supporting real-time compensation, and enhancing the stability and accuracy of the system during zooming.

A zoom endoscope optical system comprises, in order from the object side to the image side along the optical axis, a front fixed lens group, a zoom lens group and a compensation lens group, the front fixed lens group comprises a first lens, a second lens and a third lens, the zoom lens group is adjustable in position and comprises a fourth lens and a fifth lens, the compensation lens group is adjustable in position and comprises a sixth lens, a seventh lens, an eighth lens and a ninth lens, the ninth lens is an aspheric lens, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are spherical lenses, compared with the prior art, the eight spherical lenses and the one aspheric lens are arranged, thereby reducing the length of the optical system, shortening the lens diameter, simultaneously assisting in correcting the imaging quality, and the aspheric lens guarantees the edge precision and improves the imaging effect of detecting the tiny defects in the pipeline.

A three-dimensional (3D) display device may comprise a display panel including a plurality of subpixels, a variable focus lens positioned in a front position of the display panel, an optical lens positioned in a front position of the variable focus lens, a gaze detector detecting a gaze of a user positioned in the front position of the display panel to generate a gaze detection signal, an object controller generating an object information signal for an object displayed on the display panel, and a focus control circuit controlling a focus of the variable focus lens based on an emission control signal, the gaze detection signal, and the object information signal.

Increase resolution with a simple configuration. [Solution] The imaging device (1) includes a first laser light source (11) that emits a first laser beam (L1), a second laser light source (12) that emits a second laser beam (L2), a zoom lens (13) that can switch between a first focal length (f1) and a second focal length (f2), and a sensor (14) that detects reflected light from an object (2) irradiated with the first laser beam (L1) or the second laser beam (L2) through the zoom lens (13). The second focal length (f2) is longer than the first focal length (f1). When the focal length of the zoom lens (13) is the first focal length (f1), the first laser light source (11) is positioned to satisfy the Scheinproof condition. When the focal length of the zoom lens (13) is the second focal length (f2), the second laser light source (12) is positioned to satisfy the Scheinproof condition.

Embodiments of the present application provide a zoom lens, a camera module and an electronic device. The zoom lens comprises: first, second and third lens groups arranged in order from the object side to the image side along the optical axis; the first and third lens groups have negative optical power, and the second lens group has positive optical power; the first lens group is a fixed group, the second lens group is a zoom group capable of moving along the optical axis, and moves from the first end close to the object side to the second end close to the image side, thereby realizing optical zoom of the zoom lens from the telephoto end to the wide-angle end; and the third lens group is a compensation group capable of moving along the optical axis; in the first, second and third lens groups: the total number of lenses with optical power is M, the number of aspheric surfaces is N, M≤7, and N≥8; the second lens group comprises at least two lenses, at least one of the two lenses has negative optical power, and the Abbe number V thereof is ≤40. The zoom lens of the embodiments of the present application has the advantages of simple structure, miniaturization and thinness, and can realize continuous zooming.

A zoom lens (L0) comprises, in order from the object side to the image side, a first lens (L1) with negative refractive power, a second lens (L2), one or more intermediate lenses (LM), and a rear lens (LR). At least the second lens and the one or more intermediate lenses move during zooming, and the distance between each adjacent lens unit changes. The one or more intermediate lens units include an Nth intermediate lens unit located closest to an image plane, and the Nth intermediate lens unit includes a displacement unit (IS) with positive refractive power, located closest to the image plane and movable in a direction orthogonal to an optical axis of the zoom lens. A predetermined inequality is satisfied.

To provide a compact zoom lens with high optical performance. [Solution] A zoom lens comprising a plurality of lens groups arranged sequentially from the object side to the image side, wherein the distance between adjacent lens groups changes when the zoom is changed, the first lens group located furthest towards the object among the plurality of lens groups is immovable with respect to the image plane when the zoom is changed, each of the plurality of lens groups has one or more aspherical lenses made of resin material, the first lens group located furthest towards the object among the plurality of lens groups has a positive lens Gp, and when the Abbe number of the material of the positive lens Gp is ​​νdp, the partial dispersion ratio is θgFp, and the anomalous partial dispersion is ΔθgFp, a predetermined conditional equation is satisfied.

The application discloses a teleconverter lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, a thirteenth lens, a fourteenth lens and a fifteenth lens arranged in sequence along an optical axis from an object plane to an image plane, wherein the first lens and the second lens are cemented, the third lens and the fourth lens are cemented, the seventh lens and the eighth lens are cemented, the tenth lens and the eleventh lens are cemented, and the thirteenth lens and the fourteenth lens are cemented. The teleconverter lens provided by the embodiment of the application realizes multiple performances such as 3.36 times high magnification, F2.63 large aperture and distortion lower than 0.6% through the structural design of 15 lenses and the matching of the focal power of each lens, and meanwhile, the total length of the teleconverter lens is controlled within 105 mm, so that the telephoto experience with high performance and portability is provided for users.

This invention provides a zoom lens with anti-vibration properties, which facilitates miniaturization and weight reduction while maintaining good optical performance, and a camera device equipped with the zoom lens. The zoom lens, from the object side towards the image side, sequentially comprises a first lens group with positive refractive power, a second lens group with negative refractive power, an intermediate group with positive refractive power, and a subsequent group with negative refractive power. The first lens group moves during zooming. The second lens group, from the object side towards the image side, sequentially includes a front group of the second lens group that remains stationary during image shake correction and an anti-vibration group with negative refractive power that moves during image shake correction. The zoom lens satisfies a predetermined conditional expression.

An optical lens (11), a camera module, and an electronic device, for use in achieving a miniaturized zoom optical lens having a large zoom ratio. The optical lens (11) comprises a first refractive element (31), a first zoom lens group (21), and a second zoom lens group (22) which are sequentially arranged. The first zoom lens group (21) comprises a first lens group (110) having a first optical axis (a1) and a second lens group (120) having a second optical axis (a2). At least one of the first lens group (110) and the second lens group (120) is arranged on a light incident side of the first refractive element (31). The first lens group (110) can move in a direction perpendicular to the first optical axis (a1), and the second lens group (120) can move in a direction perpendicular to the second optical axis (a2), thereby changing the focal length of the optical lens (11). The second zoom lens group (22) comprises a third lens group (130) having a third optical axis (a3). The third lens group (130) can move along the third optical axis (a3) to change the distance between the third lens group (130) and the first refractive element (31), so that an optical path distance of light emitted from the first refractive element (31) and incident to the third lens group (130) can be changed, thereby changing the focal length of the optical lens (11).

This invention relates to a 30.2x continuous zoom telephoto high-definition fog-penetrating lens, comprising an optical system. This optical system consists of a front fixed lens group, a zoom lens group, a compensation lens group, a rear fixed lens group, and a filter, arranged sequentially from left to right along the light incident direction. The invention is rationally designed, realizing continuous zoom closed-loop control, focus closed-loop control, filter switching, focus feedback, and image output functions. It can perform wide-range searching and real-time tracking of targets at various distances and high speeds, and is applicable to scenarios requiring unmanned monitoring, early warning, forest fire prevention, and border and coastal defense.

This utility model relates to the field of liquid lens technology, specifically an adjustable focusing lens based on a liquid lens, including a lens mount and a liquid lens module. One end of the lens mount has a docking groove, and the liquid lens module rests against the docking groove. One end of the lens mount has a positioning groove, and the liquid lens module has a positioning box that rests against the positioning groove. The positioning box has an electrode connector, and the positioning groove has an interface. An annular inclined groove is formed on the outer ring of the liquid lens module. The lens mount has a fastening box, and a threaded hole is formed between the top of the fastening box and the docking groove. A fastening groove is formed between the inside of the fastening box and the threaded hole. The threaded post and conical head allow the operator to complete the stable installation or quick disassembly of the liquid lens module simply by rotating the threaded post, without the need for additional tools, greatly improving maintenance convenience.

A compact confocal scanning laser ophthalmoscope comprising a MEMS scan mirror with a compact scan head, for use with small animal subjects. The scan head is connected to the source, detector and control electronics by flexible optical and electrical umbilicals and includes a zoom lens to provide both a wide field of view and high resolution imaging of the retina using a range of imaging modalities.

The application discloses a kind of multi-size hole site laser cutting system and method based on dynamic focus adjustment, belong to mechanical processing technical field.The system includes: analysis and planning module, for receiving digital processing drawing and analyzing hole site geometric characteristics, according to aperture and plate thickness establishes diameter-thickness ratio parameter, and constructs multi-hole site processing sequence in combination with workpiece surface heat accumulation index, while generating corresponding focus offset initial amount;Dynamic focusing laser execution module, by movable zoom lens group being set in the light path in laser processing head interior, realize the dynamic adjustment of laser focus in optical axis direction;Monitoring module is used to collect photoelectric signal and the relative distance signal between laser processing head and workpiece surface generated in laser processing process, and the signal is transmitted to control module;Control module, focus position and laser output power are dynamically controlled based on the monitoring signal, so that laser focus realizes adaptive adjustment between perforation stage and contour cutting stage.

A large-aperture reflective zoom and laser communication integrated camera is disclosed, relating to the fields of optoelectronic imaging and laser communication technology. It addresses the technological gap where liquid zoom lenses cannot be applied to large-aperture RC systems, and the problem of relying on additional components for integrated visible light imaging and laser communication, making it difficult to balance lightweight design and high performance. The camera consists only of a primary mirror, a liquid zoom lens array, a grating film, a visible light detector, and an infrared detector. The front of the liquid zoom lens integrates a multi-layer liquid zoom lens array, with each layer having a different focal length. Independent drive circuits electrically control and adjust each lens layer to eliminate aberrations and adjust the focal length for optical systems of different apertures. The grating film on the back exhibits high reflectivity to visible light and high transmittance to 1550nm laser light, enabling visible light to form an RC structure imaging optical path, while the laser light is transmitted to complete communication. This invention can be widely applied in aerospace, aviation, and ground observation scenarios.

The application provides an optical path optimization scheduling method and system for a VCSEL array chip lens, wherein the VCSEL array chip lens comprises a VCSEL array chip, a lens array, a light beam combining unit, an optical path adjusting unit and an energy monitoring unit. The method collects optical state characteristics through the energy monitoring unit; calculates optical path loss and predicts the predicted energy density distribution of each laser unit on the target plane according to the optical state characteristics; performs energy deviation analysis according to the actual spot energy distribution and the predicted energy density distribution, and determines the focal length adjustment amount of the electric zoom lens and the aperture adjustment amount of the adjustable diaphragm through the reinforcement learning algorithm; and drives the electric zoom lens and the adjustable diaphragm to cooperatively adjust the optical path. Through the two-degree-of-freedom cooperative adjustment and the reinforcement learning intelligent decision, the application realizes the adaptive optimization of the optical path and the accurate control of the target plane energy distribution.

The application relates to the field of optics, in particular to a zoom lens and an imaging device. The zoom lens is composed of a first lens group with negative focal length, an aperture, a second lens group with positive focal length and a third lens group with negative focal length from the object plane side to the image plane side; the second lens group moves along the direction of the main optical axis; the third lens group is an eighth lens with negative focal length; the two side curved surfaces of the eighth lens are curved towards the object plane side; the eighth lens satisfies the following conditional expressions: D8 / fw>1; 1.8<ft / fw<2.2; wherein D8 is the thickness of the eighth lens on the main optical axis, fw is the focal length of the zoom lens in the wide-angle state, and ft is the focal length of the zoom lens in the telephoto state. The small-ratio zoom lens is realized, the thickness of the rear group is increased through the limitation of the thickness of the eighth lens on the main optical axis, the volume of the rear group is reduced, and the miniaturization of the zoom lens is realized.

The application provides a large-aperture middle-wave infrared continuous zoom optical system capable of realizing electromagnetic shielding, comprising a first front lens, a second front lens, a zoom lens, a compensation lens, a focusing lens, a first relay lens, a second relay lens and a third relay lens arranged in sequence along the optical axis direction from the object side to the image side; the first and second front lenses are meniscus positive lenses with convex surfaces facing the object side, the zoom lens is a double-concave silicon negative lens, the compensation lens is a double-convex silicon positive lens, and the first, second and third relay lenses are a double-convex silicon positive lens, a double-concave germanium negative lens and a double-convex silicon positive lens in sequence. The secondary imaging configuration designed by the application improves the optical axis consistency precision in the full field of view during optical mechanical adjustment, and realizes clear imaging of an infrared dim small target with a large optical aperture. The outer side of the light transmission area of each optical element extends outward with a modified extension structure, a metal electrode is plated on the surface, and an antireflection film is plated on the light transmission area, so that the imaging system is suitable for a strong electromagnetic environment.

Embodiments of the present application provide a zoom lens, a camera module and an electronic device, and relate to the technical field of electronic devices. The zoom lens comprises a first lens group, a first light path folding element, a second lens group, a third lens group and a fourth lens group arranged along an optical axis from an object side to an image side. The first lens group has positive refractive power, the second lens group has negative refractive power, the third lens group has positive refractive power, and the fourth lens group has negative refractive power. In a zooming process of the zoom lens from a short focal end to a long focal end, the third lens group and the fourth lens group are both moved along the optical axis to the object side. In a focusing process of the zoom lens from an infinite distance object to a close distance object, the third lens group is moved along the optical axis to the object side, or the fourth lens group is moved along the optical axis to the image side. In this way, the volume of the zoom lens can be reduced, which is helpful for miniaturization of the camera module.

This invention relates to a combined measurement device and method for high-temperature molten salt properties based on a multi-layer heat transfer model. The invention addresses the problem that existing high-temperature molten salt thermophysical property testing device models do not consider internal volumetric radiation and heat transfer from the encapsulated container. In this invention, a laser is connected to a fiber optic collimator via a transmission fiber. The fiber optic collimator is positioned below a constant-temperature heating furnace, which is placed on a support. A graphite crucible is positioned in the center of the bottom surface of the constant-temperature heating furnace, and a lid is fitted onto the graphite crucible. A zoom lens system is positioned directly above the constant-temperature heating furnace, with the focal point of the zoom lens system located at the center of the upper surface of the lid. A high-sensitivity infrared detector collects the infrared signal transmitted through the zoom lens system. The output of the high-sensitivity infrared detector is connected to the receiver of a Fourier transform infrared spectrometer, which is connected to a computer. This invention belongs to the field of high-temperature material thermophysical property measurement technology.

The embodiment of the present application discloses a zoom lens, comprising a negative focal length focusing lens group and a positive focal length zoom lens group arranged in sequence along the optical axis from the object plane to the image plane; the focusing lens group comprises a first lens with negative focal length, a second lens with negative focal length and a third lens with positive focal length; the zoom lens group comprises a fourth lens with positive focal length, a fifth lens with positive focal length, a sixth lens with positive focal length, a seventh lens with negative focal length, an eighth lens with positive focal length and a ninth lens with negative focal length, and the focal length FT of the long focal end of the zoom lens and the focal length FW of the wide angle end satisfy 4.2 <= FT / FW <= 5.2. By reasonably setting the focal length of each lens group, the number of lenses included in each lens group, the focal length of each lens and the ratio between the focal length of the long focal end and the focal length of the wide angle end, it is ensured that a zoom lens with larger aperture, higher image quality and more suitable for more situations can be realized.