142 results about "Small lens" patented technology

The utility model relates to a low total length 8M foresight optical lens, which is characterized in that an optical system of the lens is composed of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path. The lenses are made of plastic and glass materials, the first lens, the second lens, the fourth lens, the fifth lens and the sixth lens are glass spherical lenses, the third lens and the seventh lens are plastic aspheric lenses, and the fifth lens and the sixth lens form a balsaming lens group. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the distance between the lenses on the optical axis and the like, the total length of the lens and the radial size of each lens are reduced while the requirements of a front-view wide-angle camera and a front-view narrow-angle camera are replaced by the low-total-length 8M ultra-wide-angle imaging performance of the lens; and the lens group is miniaturized.

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 relates to a high-brightness low-cost DMD welcome lamp lens. An optical system of the lens is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens and a fifth lens which are sequentially arranged from left to right along a light incident light path. The lenses are made of plastic and glass materials, the first lens, the second lens, the third lens and the fourth lens are plastic aspheric lenses, and the fifth lens is a glass spherical lens. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the axial distance between the lenses and the like, the imaging performance requirement of the lens is met, the total length of the lens and the radial size of each lens are reduced, and the miniaturization of the lens group is realized.

The utility model relates to a DMD welcome lamp lens with short total length, the lens is composed of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens from left to right along a light incident light path, the lenses are made of glass materials, the first lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are glass spherical lenses, the second lens is a glass aspheric lens, wherein the third lens and the fourth lens, and the fifth lens and the sixth lens form a balsaming lens group. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the axial distance between the lenses and the like, the imaging performance requirement of the lens is met, the total length of the lens and the radial size of each lens are reduced, and a 33 mm lens group is formed.

The utility model relates to a 3M five-piece type foresight main camera. The 3M five-piece type foresight main camera comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens and a fifth lens which are sequentially arranged from left to right along a light incident light path, the first lens is a meniscus negative lens, the object side surface of the first lens is a convex surface, and the image side surface is a concave surface; the second lens is a biconvex positive lens, the object side surface is a convex surface, and the image side surface is a convex surface; the third lens is a biconvex positive lens, the object side surface is a convex surface, and the image side surface is a convex surface; the fourth lens is a biconcave negative lens, the object side surface is a concave surface, and the image side surface is a concave surface; the fifth lens is a biconvex positive lens, and has a convex object-side surface and a convex image-side surface. According to the utility model, the design is reasonable, the structure is simple, through reasonable distribution of the focal power and the surface type of each lens, the central thickness of each lens, the axial distance between the lenses and the like, the 3M imaging performance requirement of the five-piece lens is satisfied, the total length of the lens and the radial size of each lens are reduced, and the miniaturization of the lens group is realized.

The utility model relates to a low total length 8M foresight main camera. An optical system of the main camera is composed of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path. The lenses are made of plastic and glass materials, the first lens, the second lens, the fourth lens, the sixth lens and the seventh lens are glass spherical lenses, the third lens and the fifth lens are plastic aspheric lenses, and the sixth lens and the seventh lens form a balsaming lens group. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the axial distance between the lenses and the like, the total length of the lens and the radial size of each lens are reduced while the requirements of a front-view wide-angle camera and a front-view narrow-angle camera are replaced by the low-total-length 8M ultra-wide-angle imaging performance of the lens, and the miniaturization of the lens group is realized.

The lens unit comprises a first lens part and a second lens part, the first lens part is provided with a plurality of first small lenses which are arranged at intervals, each first small lens is provided with a first cambered surface and a first plane which are opposite to each other, and the second lens part is provided with a second cambered surface and a second plane which are opposite to each other. Wherein the second lens part is provided with a plurality of second small lenses which are arranged at intervals, and each second small lens is provided with a second cambered surface and a second plane which are opposite to each other; wherein the first lens portion and the second lens portion are mounted in a snap-in manner such that the first plane of the first lenslet and the second plane of the second lenslet are attached to each other, the first lenslets and the second lenslets are arranged so that the positions of the first lenslets correspond to the positions of the second lenslets in the thickness direction of the lens unit.

The utility model provides a dual-linkage focusing mode lens and camera shooting equipment, and relates to the technical field of optical imaging, the dual-linkage focusing mode lens comprises a manual focusing lens group, an automatic focusing lens group, a manual driving assembly, an automatic driving assembly and a position sensing trigger unit, the manual focusing lens group comprises at least one manual lens group, and the automatic focusing lens group comprises at least one automatic lens group. The automatic focusing lens group comprises at least one automatic lens group, and the manual driving assembly is connected with and manually drives the manual focusing lens group; a motor of the automatic driving assembly is in driving connection with the automatic focusing lens group; when the manual focusing lens group moves to a preset position along the optical axis, the position induction triggering unit is triggered to start the motor to drive the automatic focusing lens group to execute automatic focusing, the manual focusing lens group and the automatic focusing lens group are sequentially arranged along the optical axis, relay type optical path design is achieved, the size of the lens can be reduced, and redundant motion of the focusing lens groups can be avoided; the position sensing trigger unit is triggered to quickly switch the focusing mode, the movement of a single focusing lens group can be accurately controlled, and the focusing precision and speed are improved.

The utility model relates to the technical field of high beam LED automobile lenses, in particular to an independent high beam LED automobile lens which comprises a light-emitting device, a light-emitting mechanism is fixedly arranged in the light-emitting device, and the light-emitting mechanism comprises a lamp tube wire interface, a lamp tube installation threaded interface, a plurality of lamp tubes, lamp tube lamp beads, a lamp tube reflector and a lamp bead lens. According to the lighting device, power is supplied through the wire interface at the tail end, light emitted by the lamp tube passes through the process reflective mirror and the diverging lens, and light condensation is carried out, so that the lighting device can illuminate farther places. When a user provides a power supply, light emitted by the light-emitting beads is reflected by the reflector on the inner wall of the lamp tube, passes through the internal small lens, is reflected and condensed again when passing through the lens, and is emitted by the main lens. The device has the beneficial effects that the problem of insufficient illumination in the dark is solved, and the problem that the temperature of the device is too high and the device is damaged when the device is used for a long time is solved. Therefore, the problems encountered by people in daily life are solved.

The invention discloses a large-image-plane video small lens and a camera, and relates to the technical field of optical lenses, and the large-image-plane video small lens is provided with an object side and an image side which are oppositely arranged along the optical axis direction. The small video camera with the large image plane comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from the object side to the image side. Wherein the first lens, the second lens, the fourth lens, the fifth lens, the seventh lens and the eighth lens are plastic aspherical lenses, and the third lens and the sixth lens are glass aspherical lenses; the resolution ratio of the large-image-plane video small lens is greater than or equal to 12M, the image plane height of the large-image-plane video small lens is phi, and the total optical length of the large-image-plane video small lens is TTL, 1lt; tTL / phi < = 1.5. The technical effects of large imaging surface, good imaging effect and small size are achieved through arrangement and combination of the eight lenses, material selection, surface type distribution and parameter design of the lenses.

Proposed is a small lens system including a first lens, a second lens, a third lens, and a fourth lens arranged along an optical axis from an object. The iris diaphragm is located between the first lens and the second lens. The first lens has a negative refractive power and includes a surface concave surface on an object side and a convex surface on an image side. The second lens has a positive refractive power and includes convex surfaces on both sides. The third lens has a positive refractive power and includes convex surfaces on both sides. The fourth lens has a negative refractive power and includes concave surfaces on both sides. All surfaces of the first to fourth lenses are aspherical.

The utility model discloses a catadioptric thermal imaging optical system, which comprises a diaphragm, a second reflector, a lenslet and a first reflector which are sequentially distributed at intervals along an optical axis S from an object side to an imaging surface, and the outer diameter of the diaphragm and the outer diameter of the first reflector are larger than the outer diameter of the second reflector. A through hole is dug in the middle of the first reflector, a small lens is arranged on the left side of the through hole, the diaphragm is made of chalcogenide glass or germanium materials, the first reflector is an aspheric reflector with a concave face, the second reflector is an aspheric reflector with a convex face, and the concave face faces the diaphragm and is opposite to the convex face. Light emitted from the object side and with the wavelength ranging from 8 micrometers to 14 micrometers penetrates through the periphery of the diaphragm to reach the first reflector, is reflected by the concave face for the first time to reach the second reflector, is reflected by the convex face for the second time and then is refracted by the small lens to be imaged on the imaging face, the manufacturing cost is low, and the imaging quality is good.

The application discloses a middle-wave refrigeration infrared lens, which comprises a first lens, a second lens, a third lens and a fourth lens arranged in sequence along the transmission direction of the optical axis; the first lens and the third lens are both meniscus positive lenses with the convex surface facing the object side; the second lens is a meniscus negative lens with the convex surface facing the object side; the fourth lens is a meniscus negative lens with the convex surface facing the image side; the air gap between the first lens and the second lens is 1 mm; the air gap between the second lens and the third lens is 54 mm; and the air gap between the third lens and the fourth lens is 5 mm; wherein the lens further comprises a reflecting mirror arranged between the second lens and the third lens to change the direction of the optical axis; the lens provided by the application has the advantages of small lens length size, simple structure, large target surface, clear imaging, and the ability to match a 320*256 resolution and a 30 mu m refrigeration type detector; and the application further discloses an imaging device.

The application discloses a lens module and a camera device with the same. The lens module comprises a lens barrel, a movable part and an electromagnetic driving assembly. The lens barrel is internally provided with a containing space. The movable part is used for carrying an image sensor. Part of the movable part used for carrying the image sensor is located below the containing space. The electromagnetic driving assembly comprises a coil and a magnetic body. The electromagnetic driving assembly is arranged below the containing space. The electromagnetic driving assembly drives the movable part to move by generating Lorentz force or magnetic force between a magnetic field generated by energizing the coil and the magnetic body, so as to drive the image sensor to move. According to the lens module of the embodiment of the application, focusing is realized by driving the image sensor to move instead of driving the lens assembly to move, so that the driving force required by the lens module is smaller, the space reserved for the image sensor by the lens module is smaller, and the thickness in the axial direction can be saved.

The present invention relates to a submicron resolution metalens-type endoscope lens that eliminates both chromatic aberration and spherical aberration, including a metalens, wherein the metalens includes a mirror, and the mirror has a plurality of structural units that focus the excitation light and the fluorescence to the same plane and the same focus. The plurality of structural units include a plurality of first structural units and a plurality of second structural units, wherein the first structural unit is used to transmit the excitation light, and the second structural unit is used to transmit the fluorescence. The present invention can simultaneously realize a single-piece lens (easy to assemble), a small lens size (capable of entering a tiny channel), and a high imaging resolution (eliminating both chromatic aberration and spherical aberration), and is expected to apply confocal fluorescence endoscope imaging technology to pancreatic and bile duct imaging. At the same time, due to the high resolution of the lens, real-time, in vivo diagnosis of pancreatic lesions can be achieved by accurately observing changes in cell morphology and structure.

The invention relates to the field of measuring instruments, and discloses a multifunctional rapid measuring instrument for large and small lenses, which comprises a carriage plate, a damping connecting assembly is arranged at the upper end of the carriage plate, and at least three supporting legs are arranged at the upper end of the damping connecting assembly. Connecting blocks are fixedly welded to the ends, away from the damping connecting assemblies, of the supporting legs, no less than four connecting screws are arranged in the connecting blocks in a penetrating mode, and multi-direction adjusting assemblies are arranged at the upper ends of the connecting blocks. According to the invention, through the collaborative design of an innovative three-stage damping system (composed of a damping pad, a damping column, a damping spring, a limiting block and a buffer pad), a multi-direction adjusting assembly and a quick connecting and disconnecting assembly, the stability and adaptability of equipment in a dynamic operation environment are remarkably improved; a multi-point uniform stress structure and a composite damping mechanism effectively attenuate multi-band vibration in the running process of a vehicle, and high-precision data acquisition of the measuring instrument on a mobile platform (such as an inspection vehicle) is guaranteed.

The utility model provides a high-pixel automatic focusing miniature lens, which comprises a lens main body, a fixing ring sleeved on one side of the surface of the lens main body, a taking assembly arranged on the surface of the fixing ring and comprising an arc-shaped sliding groove, arc-shaped sliding blocks slidably connected to the left side and the right side of the arc-shaped sliding groove, and a connecting belt connected between the two arc-shaped sliding blocks. The multiple limiting assemblies are arranged between the fixing ring and the two arc-shaped sliding blocks correspondingly. According to the high-pixel automatic focusing small lens provided by the utility model, the surface of the lens main body is provided with the fixing ring with the arc-shaped sliding groove, the arc-shaped limiting groove and the communicating groove, and the fixing ring is matched with the two arc-shaped sliding blocks with the arc-shaped limiting blocks and the connecting belt for use; when a user carries the lens main body outdoors for use and carries out replacement operation of the lens main body, the lens main body can be protected by taking the connecting band in the process of taking and disassembling the lens main body, and the lens main body is prevented from falling and being damaged by collision due to misoperation.

The invention relates to a DMS optical lens based on an infrared image, an optical system of the lens is composed of a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from left to right along a light incident light path, and a diaphragm is arranged on an S1 surface of a lens L1. Wherein the first lens is a biconvex positive lens; the second lens is a plano-concave negative lens; the third lens is a meniscus convex positive lens; the fourth lens is a meniscus convex positive lens. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the axial distance between the lenses and the like, the design meets the imaging performance requirement of the lens, and meanwhile, the total length of the lens and the radial size of each lens are reduced by adopting the structural form of an all-glass spherical lens, so that the imaging performance of the lens is improved. The purposes of lens group miniaturization and cost reduction are achieved.

An intraocular lens (IOL) has a small, central lens suspended within a pliable housing and, when the housing is filled with liquid, is coaxially aligned with a second small lens embedded in the wall of the housing. The suspension is on a dome- or other-shaped webbing attached to an inner circumference of the wall. When filled with liquid, forces squeezing or pulling the equator of the housing, as with ciliary muscles in the eye, adjust a distance between the lenses in order to adjust focus. Optional haptics may project from points on or above and below the equator. A recess in the posterior hemisphere of the housing can keep cell growth away from an optical axis of the lens system. A third small lens can be embedded in an opposite wall of the housing and coaxially aligned with the other lenses to form a three-lens, ultra-zoom system.

The invention discloses a deformable lens, which belongs to the field of optical lenses and comprises a first cylindrical lens group, a first spherical lens group, a second spherical lens group, a third spherical lens group, a fourth spherical lens group, a second cylindrical lens group and a fifth lens group which are sequentially arranged from an object space to an image space. The focal lengths of all the lens groups meet the following conditions: 1.2 lt; f (G1-G7) Y / f (G1-G7) Xlt; 1.8); -7.7 lt,-7.7 lt; f (G2) X / f (G1-G2) Xlt; -6.9,-6.9; -1.8 lt,-1.8 lt; f (G6) Y / f (G3-G7) Ylt; -1.0, and-1.0; 0.6 lt; f (G7) Y / f (G3-G7) Ylt; 1.4, 4; -4.6 lt,-4.6 lt; f (G1-G2) X / f (G3-G7) Xlt; and 3.8. The integrated design is adopted, so that the lens is small in size, and meanwhile, the optical performance of large aperture, high resolution, low respiration, low distortion, 1.33 X deformation ratio and the like is obtained.

The invention discloses an achromatic fluorescence laparoscope optical system, which consists of an endoscope group and an eyepiece. The endoscope group consists of an objective lens with positive optical power and a rod lens group with positive optical power. The objective lens consists of a first objective lens group and a second objective lens group. The second objective lens group includes a first cemented lens and a second cemented lens. The system has the advantages that by reasonably arranging the optical power distribution of the lens, the use requirements can be met, and it is ensured that the endoscope group can adjust the visible light and fluorescence states at any time when in use without additional debugging, and a margin is reserved for the rod lens group of subsequent image transfer; at the same time, by reasonably arranging the optical power distribution of the lens and the design of the cemented lens, and appropriately controlling the length of the objective lens, the light can be smoothly propagated in the objective lens, the sensitivity of the lens can be reduced, the direction of the light beam can be adjusted, the chromatic aberration caused by the visible light and fluorescence bands can be suppressed, the aberration can be corrected, and the imaging quality can be improved.

The application provides a camera lens, a camera device and an information terminal. The camera lens is sequentially arranged from an object side to an image side with: a first lens with negative refractive power, the first lens being an aspherical lens; a second lens with negative refractive power, the second lens being an aspherical lens; a third lens and a fourth lens with refractive power; a fifth lens with positive refractive power; a sixth lens with positive refractive power; a seventh lens with negative refractive power, the sixth lens and the seventh lens being cemented lenses; an aperture stop; an eighth lens with positive refractive power; and a ninth lens with negative refractive power, the object side surface of the ninth lens being concave at a near optical axis. The camera lens provided by the embodiment of the application has wide-angle characteristics, a short total length and a small lens aperture, and can effectively control distortion and match an image sensor with a large read-in angle.

This invention discloses an endoscope with a 30° viewing angle, belonging to the field of medical optical imaging. It includes an operating unit and a tube located at the end of the operating unit. A lens module capable of achieving a large field of view and high resolution is disposed at the end of the tube away from the operating unit. The lens module includes a first lens, a steering prism assembly, a filter, a second lens, an aperture stop, a third lens, a fourth lens, a fifth lens, and a sixth lens, arranged sequentially from the object side to the image side within the tube. The steering prism assembly enables optical path steering to form a 30° viewing angle. This 30° viewing angle endoscope achieves a 30° viewing angle through the steering prism assembly. Through the rational combination of optical lenses, it achieves a large field of view and high resolution while ensuring a miniaturized lens size, solving the problems of small field of view, large lens size, and low resolution commonly found in rigid electronic endoscopes.

1. Name of the design product: LED small lens automotive bulb. 2. Use of the design product: For automotive lighting. 3. Design key points of the design product: Lies in the shape. 4. Picture or photo that best shows the design key points: Stereogram 1.

The application discloses a device and method for measuring deflection cemented lens eccentric distance, which comprises a deflection cemented lens to be measured, a lens tube clamping assembly, an integrating sphere uniform light source, a camera and an auxiliary rotating table. The deflection cemented lens to be measured comprises a deflection prism and a small lens group which are cemented. The lens tube clamping assembly comprises a double-layer lens tube for fixing the deflection cemented lens to be measured. The integrating sphere uniform light source is used to provide uniform light which is converged into a light spot after passing through the deflection cemented lens to be measured. The auxiliary rotating table is used to adjust the camera or the lens tube clamping assembly so that the optical axis of the camera is perpendicular to the top plane of the deflection prism. The distance between the center of the light spot and the center of the small lens group is the eccentric distance of the deflection cemented lens to be measured. The application calculates the deviation between the light spot and the small lens group at the top by means of image recognition, so as to determine the cementing effect of the deflection cemented lens, and greatly improves the assembly efficiency and the yield of the product.

The application provides a kind of array camera-based coastline ship real-time tracking method, which comprises determining the small lens number and the overlapping area of the image data collected between each adjacent small lens according to the small lens distribution of array camera;All ships to be tracked in the small lens are preliminarily labeled rectangular frame TE;Each labeled rectangular frame TE ship forms a detection frame TF, and a set of Box (x, y, w, h) and a set of feature vectors P are obtained;The intersection-over-union (IOU) of the detection frame TF and the rectangular frame TE of the ship to be tracked is compared, and the ship to be tracked with the intersection-over-union (IOU) reaching the set value is tracked;The ship tracking sequence TraceQueue is obtained;The current small lens sends the signal of the ship to be tracked to the corresponding adjacent small lens through socket communication, and continues to track the ship in the adjacent small lens. The position information and the feature vector of the ship are combined to determine whether two targets in different cameras are the same, thereby improving the accuracy of target tracking.

The present application provides a lens driving mechanism and an electronic device with the same. The lens driving mechanism is used to drive a lens unit to move along an optical axis direction, which comprises an outer frame, a base, a lens carrier and a driving assembly. The outer frame is made of plastic material and has an opening. The base is in contact with the outer frame and is fixed with the outer frame. A receiving space is formed between the outer frame and the base. The lens carrier is movably arranged in the receiving space and is used to carry the lens unit. An external light enters the receiving space through the opening of the outer frame and reaches the lens unit. The driving assembly is arranged in the receiving space and is connected with the lens carrier and the outer frame to drive the lens unit to move along the optical axis direction. The lens driving mechanism can greatly reduce the overall size of the lens driving mechanism and effectively reduce the manufacturing cost.

The present invention discloses a telescopic lens device and a mobile phone. The telescopic lens device includes a shell, at least two lens groups and a stretching buffer. The shell is formed with a mounting channel having an object side end and an image side end relatively arranged along a first direction. A connecting portion with a connecting platform is provided in the mounting channel. At least two lens groups are installed in the mounting channel, including a first lens group arranged adjacent to the image side end. The first lens group is movably installed in the mounting channel along the first direction. The first lens group has a mounting platform that is opposite to and spaced from the connecting platform along the first direction. The mounting platform is arranged adjacent to the image side end. The stretching buffer is provided between the mounting platform and the connecting platform, and the two ends are connected to the connecting platform and the mounting platform. Under the action of the stretching buffer, the speed of the first lens group moving toward the image side end is slowed down, the force on the lens is reduced, and the problem of the first lens group colliding with the mobile phone body located at the image side end due to excessive speed is avoided, thereby improving the service life of the telescopic lens device.

The utility model discloses a lens assembly motion structure of a double-color-temperature and double-color-rendering-index module, which comprises an array support, small round holes are arranged on the array support in an array mode, and a small lens is arranged in each small round hole. An array lens is fixed on the array bracket, and the position of the array lens corresponds to that of the small lens; a linear bearing module is arranged on the motion support, and the array support is fastened on the motion support through the linear bearing module. According to the utility model, through the structure of the motion support and the linear bearing module, accurate adjustment of the lens assembly is ensured, and the optical collimation performance is optimized.

The application relates to a 3M five-piece front-view main camera and an imaging method thereof, which is composed of a first lens, a second lens, a diaphragm, a third lens, a fourth lens and a fifth lens arranged in sequence from left to right along the light incident path; the first lens is a meniscus negative lens, the object side surface of which is a convex surface, and the image side surface is a concave surface; the second lens is a biconvex positive lens, the object side surface of which is a convex surface, and the image side surface is a convex surface; the third lens is a biconvex positive lens, the object side surface of which is a convex surface, and the image side surface is a convex surface; the fourth lens is a biconcave negative lens, the object side surface of which is a concave surface, and the image side surface is a concave surface; and the fifth lens is a biconvex positive lens, the object side surface of which is a convex surface, and the image side surface is a convex surface. The application has the advantages of reasonable design and simple structure, and through reasonable distribution of the optical power, surface type, central thickness of each lens and the axial distance between the lenses, the total length of the lens and the radial size of each lens are reduced while the 3M imaging performance requirement of the five-piece lens is met, and the lens group is miniaturized.