311 results about "Single lens" patented technology

The invention discloses a single-lens coupling assembly, a single-lens mode field conversion device and a connector. The single-lens coupling assembly comprises a first optical fiber with a first mode field diameter; a second optical fiber having a second mode field diameter; the sleeve is provided with a hollow tube cavity with two through ends, and one end of the first optical fiber and one end of the second optical fiber respectively extend into the hollow tube cavity from openings in the two ends of the sleeve; and the lens is positioned in the sleeve between the first optical fiber and the second optical fiber and is used for realizing conversion of mode field diameters between the first optical fiber and the second optical fiber. Conversion of different mode fields between the first optical fiber and the second optical fiber is achieved through the single lens, and therefore reliable and stable connection between the optical fibers is achieved.

The invention relates to an underground cavern surrounding rock three-dimensional vibration measurement method and device, and the method comprises the steps: generating a light spot meeting a preset clear condition through beam splitting laser; acquiring the vibration condition of the laser source and the vibration condition of the photographic lens; cutting the tracking record image of the light spot, and respectively calculating the relative displacement time history of the feature points and the boundary of the light spot; based on curvature, length and area changes of the circular light spot in different directions, a vertical relative displacement time travel curve of the light spot perpendicular to the surface of the surrounding rock of the target underground cavern is calculated; and differentiating the obtained plane and vertical displacement time histories to obtain corresponding vibration velocity time histories, and combining to construct the actual three-dimensional vibration velocity of each light spot. According to the embodiment of the invention, the monitoring cost is reduced, the field monitoring efficiency and the monitoring data volume are improved, the applicability in the construction environment with poor light of the underground cavern is higher, the defects of a high-speed photographing single lens in three-dimensional data representation are overcome, and effective monitoring and evaluation of three-dimensional vibration of the underground cavern are realized.

The invention discloses a projection display system and near-to-eye display equipment. The projection display system comprises a beam splitter prism, a display element and an imaging assembly. The beam splitter prism is matched with a reflector, a field lens and a single lens in the imaging assembly, and light in the projection display system is turned. Light emitted by the display element enters the beam splitter prism after passing through the field lens and is transmitted to the reflector by the beam splitter prism, the reflector reflects the light, and the reflected light enters the beam splitter prism again, is reflected to the single lens by the beam splitter prism and then is emitted from the light emitting side of the projection display system. Therefore, the imaging light path is compressed, the size of the projection display system is effectively reduced, and the miniaturization of the projection display system is realized.

The invention belongs to the technical field of radiation effect and radiation hardening of semiconductor devices and integrated circuits, and particularly relates to a single event effect laser simulation system based on Bessel beam shaping. A Bessel beam shaping and focusing module based on an axon lens is introduced and composed of the axon lens and two lenses, namely a single lens and a focusing lens, a Gaussian beam of an incident beam is shaped into a quasi-Bessel beam, and the quasi-Bessel beam is utilized to irradiate a semiconductor device to be detected. The axial distribution of the light beam is kept unchanged in a range of hundreds of microns, and the focusing breaking through the diffraction limit is realized in the radial distribution, so that the effect closer to the heavy ion charge deposition track is generated. The technology can solve the problem that a multilayer structure device, a thick sensitive region device and a wide forbidden band device are difficult to test through traditional laser simulation, and has important practical value for promoting laser simulation of the single event effect.

The invention provides a face consistency multi-angle lens video generation method and device, and relates to the technical field of multi-angle lens video generation, the method comprises the steps: carrying out the personalized adjustment of an image generation model through a LoRA fine tuning technology, and generating a multi-angle multi-pose image sequence of the same person from a single picture; synthesizing the plurality of images into a short video clip by using an image-to-video module; generating a copywriting script conforming to voice broadcast logic through a large language model (LLM); and finally, combining lip-shaped driving and video stitching technologies, synthesizing voice and images, driving the mouth shape to act, and stitching a multi-angle lens into a smooth and coherent complete video. The automation degree of the oral video is remarkably improved, the sense of reality and the visual richness of the video are enhanced, and the problems that in the prior art, when the oral video is generated, the lens is single, the process is scattered, lip-shaped driving is not coherent, and manual intervention is much are solved.

The invention relates to a high-precision historic building digital building block system and a modeling method thereof, and relates to the technical field of digital cultural heritage protection and education, and the system comprises a three-dimensional modeling module which is used for obtaining millimeter-level precision geometric data of historic building components through employing a laser point cloud and multi-view image fusion technology, the module acquires data through a laser scanner and a digital single lens reflex and realizes spatial registration by using a feature point matching algorithm. Through the laser point cloud and multi-view image fusion technology, millimeter-level precision geometric data acquisition of the ancient building component is realized, the accuracy of a digital model and the application of a parametric modeling algorithm are ensured, the building block units can be generated and scaled in proportion to adapt to different application scenes, and meanwhile, the consistency of geometric characteristics is kept; the design of a standardized plug interface module is based on topological optimization, connection requirements of different ancient building elements are automatically adapted, and the characteristics of a tenon-and-mortise structure are reserved.

The utility model discloses a single particle mechanical property test system, which can realize the whole process of observing and detecting micro particles from being extruded to a crushing state, and comprises a test frame, an objective table, a glass slide, a pressure head, an objective lens, a lower light source, an eyepiece, an imaging device and a refraction single lens, the objective table is mounted on the test frame in an X-Y axis adjustable manner, and is provided with a through hole; the glass slide stretches across the through hole and is used for placing a particle sample to be tested; the pressure head is matched above the objective table in a lifting manner along the Z-axis direction; the objective lens is arranged below the through hole; the lower light source is arranged on the side below the objective lens; the eyepiece is arranged on the surface of the test frame; the imaging device is arranged in the test frame; the refraction single lens is arranged below the objective lens, and the reflection surface of the refraction single lens simultaneously faces the objective lens and the imaging device; the refraction single lens refracts light emitted by the lower light source to the direction of the objective lens, the light in the direction of the objective lens is reflected to the imaging device through the reflection face, and the imaging device presents collected images on the eyepiece.

Optical systems and lens assemblies suitable for use with, for example, AR applications on portable electronic devices, including wearable devices such as electronic eyewear. The lens assembly supports a single lens or multiple lenses. The lens assembly includes a lens and a flange that defines a recess for receiving an adhesive. When the lens is placed on the flange, the adhesive secures the lens to the flange. In some implementations, the lens includes a band or strip of paint or other indicia applied along the perimeter of the lens to inhibit visibility of any excess adhesive. A lens assembly that supports both a front and rear lens is particularly useful for presenting AR experiences.

A solar wall lamp comprises a lamp bottom shell, a photovoltaic panel, a photovoltaic base and a lamp single lens, the lamp bottom shell and the lamp single lens are connected together in a clamped mode, the photovoltaic panel is arranged on the photovoltaic base plate, two battery bins are arranged on the back face of the lamp bottom shell, a detachable battery cover is arranged on each battery bin, and the lamp single lens is arranged on the photovoltaic base plate. Two circles of vertical walls are annularly arranged on the peripheral edge of the side, opposite to the battery cover, of the battery bin, a circle of containing groove is formed between the two vertical walls, the side wall of the battery cover is buckled to the vertical wall on the outer side, a circle of vertical wall arranged in the containing groove is annularly arranged in the battery cover, and a circle of first waterproof sealing ring is arranged between the side wall of the battery cover and the fixing wall. A circle of waterproof groove is annularly formed in the peripheral edge of the side, opposite to the lamp single lens, of the lamp base, a circle of second waterproof sealing ring is arranged in the waterproof groove, the side wall of the lamp single lens is buckled in the waterproof groove, the four corners of the frame of the photovoltaic base are each provided with a buckling position used for fixing a photovoltaic panel, and the photovoltaic lamp is convenient to disassemble and maintain.

The objective lens for an endoscope consists of, from an object side to an image side, a first lens group having positive optical power and a second lens group having positive optical power. During focusing, only the second lens group moves. The first lens group includes a single lens that has negative optical power closest to the object side. The objective lens for an endoscope satisfies conditional expressions determined in advance related to a maximum image height, a focal length of a whole system, a maximum half angle of view, a focal length of the first lens group, a focal length of the second lens group, and a focal length of the single lens of the first lens group.

The invention discloses a DUV microscope objective with high NA and long working distance. The microscope objective is sequentially composed of a first lens group with negative focal power, a second lens group with positive focal power and a third lens group with positive focal power from an image side to an object side along an optical axis. The first lens group comprises a biconcave lens and a negative meniscus lens, the second lens group contains a diaphragm and is composed of a plurality of positive lenses, and the third lens group is composed of two positive meniscus lenses with concave surfaces facing the object side. By strictly controlling the focal length proportional relation (1 < = f1 / f < = 3, 11.2 < = f2 / f < = 12.2, and 12.7 < = f3 / f < = 13.7) and key structure parameters of the three groups of lenses, and by adopting an aspheric and full single lens structure, the contradiction between a high numerical aperture and a long working distance is cooperatively solved. According to the invention, the excellent performance that NA is greater than or equal to 0.85 and the working distance is greater than or equal to 14.6 mm at the wave band of 248nm is realized, the aberration correction is good, the service life is long, and the optical system is suitable for semiconductor detection and other precise optical fields.

The invention relates to the technical field of optical imaging, and particularly provides an underwater ultra-wide-angle imaging optical lens and equipment, the underwater ultra-wide-angle imaging optical lens and equipment are suitable for a liquid medium with the refractive index of 1.3-1.4 and are especially designed for an underwater high-pressure environment, the lens sequentially comprises protective glass, a front lens group with positive focal power and a rear lens group with positive focal power in the light incidence direction, wherein the front lens group is composed of six lenses including a single lens and a glued lens, the rear lens group is composed of four lenses including a single lens and a glued lens, aberration correction is achieved by optimizing focal power distribution and glued structures of all the lenses, and the underwater field angle reaches 140 degrees or above within the waveband range of 450-700 nm. The system solves the problems of limited view field, low contrast ratio and the like caused by total reflection in underwater imaging, has the characteristics of miniaturization, wide view field and high resolution, and is suitable for scenes requiring deep underwater monitoring and monitoring. In addition, the optical system is a full-spherical-surface optical system and does not comprise an aspheric surface, and the economic benefits are effectively improved.

The optical lens includes, in order from the object side, a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having positive refractive power. Focusing is performed by movement of the second lens group. The first lens group is composed of two lenses, namely a first lens as a negative lens and a second lens as a negative lens having a concave surface facing the image side. The second lens group is configured from one positive meniscus lens having a convex surface facing the object side. The third lens group has, in order from the object side, a single lens having a positive refractive power and a cemented lens comprising a positive lens and a negative lens. When L1Rr is the curvature radius of the image side surface of the first lens and L2Rr is the curvature radius of the image side surface of the second lens, 0.01 < L1Rr / L2Rr < 0.95 is satisfied.

The display panel, the display device, the adjusting method and the related equipment are provided, and the display panel is improved by adjusting the light path adjustment layer. The lens with different curvature radii is added or the single lens is designed as the lens containing multiple curvature radii. In this way, the light path of the light emitted by the light emitting layer at both ends of each lens is optimized, so that the light path can converge at a point after passing through the light path adjustment layer, thereby reducing the crosstalk influence caused by the light path adjustment layer and improving the yield of the product.

The present application relates to the technical field of optical aspheric surface, especially points to a kind of free curved surface characterization method based on CGH lens zero position compensation detection optical path, with the detection of free curved surface as the guide, based on zero position compensation detection principle, according to ray tracing method, Snell's law, diffraction principle and equal optical path principle, using the parameters required by interferometer incident wave front as plane wave, compensator as single CGH lens zero position compensation detection system indirectly characterizes free curved surface shape, by using XY polynomial and Zernike standard phase polynomial, the mathematical description of free curved surface is realized in design stage can determine its measurement scheme, and according to the characterization method self-defined a kind of aspheric surface type, called zero position free curved surface.The free curved surface characterization method improves the degree of freedom of free curved surface shape and the feasibility of zero position compensation method, reduces the detection difficulty of free curved surface shape, realizes the function of zero position free curved surface design can be detected.

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 provides a reflection core shift detection device for a single lens or a lens group, and belongs to the field of advanced manufacturing. A single lens or lens group reflection core shift detection device comprises a detection light path system, and the detection light path system comprises a receiving target surface, a focusing lens group, a semi-reflecting and semi-transmitting beam splitter prism, a lens I, a lens II, a detected lens and a light source. A light source enters from one side of the semi-reflecting and semi-transmitting beam splitter prism, and the semi-reflecting and semi-transmitting beam splitter prism divides a light beam generated by the light source into a reflecting light path and a transmitting light path; the transmission light path is emitted to the detected lens through the lens I and the lens II in sequence, and the lens I and the lens II are respectively vertical to the optical axis of the transmission light path; the reflection light path is emitted to the receiving target surface through the focusing lens group, and the focusing lens group is perpendicular to the optical axis of the reflection light path. The reflection core shift detection device for the single lens or the lens group can simultaneously detect the core shift of two surfaces of the lens or the lens group, is convenient and fast, and improves the detection efficiency.

The utility model provides a multifunctional light and shadow game box and a light and shadow game device, and belongs to the technical field of light and shadow game toys, the multifunctional light and shadow game box comprises a box body, a bottom plate and a top cover provided with an observation port, the box body is a hollow square body and comprises a top opening, a bottom end opening and a light-transmitting opening, the light-transmitting openings are formed in the four side walls of the box body respectively, the bottom plate is removably embedded in an opening in the bottom end of the box body, and the top cover is removably covered on an opening in the top of the box body; a first slot is formed in each of four side wall bodies of the box body, and the position of the first slot corresponds to the light-transmitting opening in the side wall body where the first slot is located; when the single-lens insertion piece is inserted into the first insertion groove, the single-lens gasket seals the light-transmitting opening. The game box is matched with insertion pieces of various colors or single-lens insertion pieces, single-lens gaskets, light source lamps and the like, so that different light and shadow games can be played.

The present application relates to the technical field of optical instruments, and discloses a microscope objective, which is suitable for at least a temperature environment of 50K to 150K and comprises: a front group unit, which comprises at least a first lens and a second lens arranged in sequence along an optical path, and is suitable for converging light rays and correcting spherical aberration; a middle group unit, which is arranged on the rear side of the optical path of the front group unit, comprises at least a first middle group and a second middle group, and is arranged in sequence along the optical path, each middle group is provided with at least two lenses arranged at intervals, and is suitable for correcting chromatic aberration; and a rear group unit, which is arranged on the rear side of the optical path of the middle group unit and comprises at least two lenses arranged at intervals; each lens contained in the front group unit, the middle group unit and the rear group unit is a single lens. By arranging each lens as a single lens, the combination connection of each unit and the whole microscope objective is avoided, the problems of damage, falling or air leakage in an extreme environment such as low temperature are avoided, and the application in a low-temperature environment is met.

The invention relates to a continuous zooming large objective lens system for double depth-of-field fusion. The system is sequentially provided with a large objective lens system, a beam splitting system, a zoom system and an imaging system along a light path, wherein the large objective lens system comprises protective glass, a movable negative lens group (single lens) and a fixed positive lens group (double bonding lens). Continuous zooming is achieved by moving the negative lens group along the optical axis, the focal length range is 240-445 mm, the working distance is adjustable (135-350 mm), and the operation surface observation range is 40-100 mm. According to the system, an apochromatic technology is adopted, H-K9L and H-ZF6 optical glass with abnormal dispersion coefficients is selected, and the MTF value is larger than or equal to 0.5 at 35l p / mm under high magnification and is close to the diffraction limit. The invention has the innovation points that the structure (a single lens and a double bonding lens) is simplified, the mechanical compensation zoom design and a large exit pupil diameter (phi 60-71mm) matching beam splitting system are adopted, and the problems of unsmooth zoom curve, complex process and insufficient exit pupil matching in the prior art are solved.

The utility model relates to coaxial light source technical field discloses a kind of high parallelism coaxial light source, including panel, the first side plate is fixedly connected in the panel bottom, the second side plate is fixedly connected in the panel bottom, the installation side plate is fixedly connected in the second side plate side wall, the anti-reflection lens is fixedly connected in the panel top, the first side plate side wall is fixedly connected with light splitter, the light splitter other side is fixedly connected in the second side plate side wall, the connecting piece is fixedly connected in the panel bottom, the lens barrel is fixedly connected in the connecting piece side wall.In the utility model, light source is generated by high-power aluminum base lamp plate, the effect that light source can be more finely adjusted light propagation direction is connected between first collimating lens and second collimating lens, the problem that single lens cannot be fully corrected as parallel light when traditional single lens collimation, resulting in lower light parallelism precision is solved, and the stability of high parallelism coaxial light source is improved.

The application provides a compact internal focusing wide-angle photographic lens, which comprises, in sequence from the object side to the image side along the optical axis, a first lens group with negative refractive power, an aperture stop, a second lens group with positive refractive power, and a third lens group with negative refractive power; during the focusing process from infinity to a close distance, the second lens group moves along the optical axis towards the object side; the first lens group contains at least two pieces of meniscus negative lenses, one of which is an aspheric lens, and satisfies the following condition formula: -7<F1 / F<-3, (1); the second lens group satisfies the following condition formula: 0.5<F2 / F<0.9, (2); wherein F represents the focal length of the photographic lens, F1 represents the combined focal length of the first lens group, and F2 represents the combined focal length of the second lens group. The application focuses by adopting the mode of internal single lens group movement, and good imaging quality and compact lens size are realized through reasonable optical design.

The utility model discloses a single lens reflex one-time imaging camera with a replaceable lens, which comprises a camera body and photographic paper arranged in the camera body, and further comprises a replaceable lens bayonet, a mechanical shutter system, a single lens reflex optical view finding system and an FDU instant imaging module, the camera further comprises an interchangeable lens, the interchangeable lens is connected with the camera body through an interchangeable lens bayonet, and the interchangeable lens bayonet is connected with the camera body through a clamping device. The single lens reflex optical framing system comprises a reflector assembly, a pentaprism structure and a viewfinder, the reflector assembly is arranged behind the replaceable lens bayonet, the position of the reflector assembly is controlled through a mechanical shutter system to achieve switching between framing and shooting, and light enters from the replaceable lens, is reflected to the pentaprism structure through the reflector assembly and is finally projected to the viewfinder; the mechanical shutter system is arranged behind the reflector assembly; according to the scheme, the universality of the camera is optimized, and a user can freely replace the lens according to different scenes and enjoy the convenience of instant imaging at the same time.

According to the line scanning ultra-wide-angle fundus imaging system and method, the super-lens is adopted to replace an eye objective lens in traditional fundus photographing, fundus ultra-wide-angle imaging is achieved, the super-lens can form an ultra-wide-angle middle image plane of fundus retina by adopting a single lens, the structure is compact and small, the size is very light, and the imaging effect is good. The size and the weight of the ultra-wide-angle fundus imaging system are greatly reduced; as the super lens only has two reflecting surfaces which may cause stray light, and the traditional eye objective lens adopts a plurality of lenses, and each lens has two reflecting surfaces which may cause stray light, the stray light during system imaging is reduced by adopting the super lens, and the system complexity and difficulty caused by stray light suppression are also greatly reduced.

The present application relates to the technical field of optical aspheric surface, especially refers to a kind of splicing aspheric surface characterization method based on CGH lens zero position compensation detection optical path, with the detection of aspheric surface as the guidance, based on zero position compensation detection principle, according to ray tracing method, Snell's law, diffraction principle and equal optical path principle, using the parameters required by the zero position compensation detection system of interferometer incident wave front as plane wave, compensator as single CGH lens and diffraction surface as binary optical surface 3 or binary optical surface 4 to characterize aspheric surface surface shape, and according to the aspheric surface type defined by the characterization method, it is called zero position splicing aspheric surface.According to the splicing aspheric surface characterization method, the measurement scheme can be determined in the design stage through the mathematical description of splicing aspheric surface, which avoids the influence of stray light and projection distortion of CGH detection, reduces the detection difficulty of splicing aspheric surface surface shape, and realizes the function of zero position splicing aspheric surface design.

The invention provides an optical lens, a camera module and an electronic device, the optical lens comprises a first lens group, a first prism and a second lens group which are sequentially arranged from an object side to an image side, the first lens group has positive focal power, the first lens group is a focusing lens group, and the first lens group is used for receiving light emitted into the optical lens; the first prism is used for reflecting the light from the first lens group at least twice; the second lens group has negative focal power, the second lens group is a focusing lens group, and the second lens group is used for receiving the light emitted from the first prism; wherein the optical lens can selectively move at least one lens group in the first lens group and the second lens group so as to realize optical focusing of the optical lens. The first lens group and the second lens group are focusing lens groups, and the optical lens can complete focusing through alternate movement of the two lens groups, so that the focusing stroke of a single lens group can be reduced, the movement precision of the lens groups can be improved, and the focusing precision of the optical lens can be improved.

The utility model discloses a spherical reflector capable of prolonging illumination, which comprises a plurality of groups of single mirror bodies, a hanging rope and a supporting rope, each single mirror body consists of a hollow spherical mirror, a silver powder paint coating is plated in each spherical mirror, the top of each spherical mirror is a planar positioning surface, a groove is formed in the middle of each positioning surface, and the hanging rope is connected with the supporting rope. The hanging rope is arranged on the top side of the single mirror body and arranged in the corresponding groove, the supporting rope is arranged on the bottom side of the single mirror body, extending grooves are formed in the two ends of the groove, the inner groove size of each extending groove is consistent with the size of the groove, the hanging rope is attached to the inner sides of the groove and the extending grooves, and a buckling cover is arranged on the top of the position, close to the spherical mirror, of each extending groove. The inner side size of the buckling cover is matched with the outer side size of the extending groove, fastening bolts are arranged at the two ends of the buckling cover, the fastening bolts are fixed to the buckling cover and the corresponding extending groove through threads, and supporting assemblies are arranged on the two sides of the bottom of the spherical lens respectively and connected with supporting ropes. The LED lamp is simple and reasonable in structure, and can enlarge the illumination range and prolong the illumination time of an application scene.

The present invention relates to a large-aperture internal-focus optical system comprising a first lens group with positive focal power, a second lens group with negative focal power, and a third lens group with optical power, arranged sequentially from the object side to the image side. The first lens group comprises a first lens group, an aperture stop, and a second lens group, arranged sequentially from the object side to the image side. The second lens group comprises a single lens that can be moved along the optical axis for focusing. By ensuring that the optical system satisfies specified conditional expressions, the present invention enables the optical system to achieve a medium-short focal length equivalent to a 35mm camera, while also achieving a large aperture, lightweight, compact size, and excellent imaging performance.

The present invention discloses a 16mm fixed-focus optical system with a large aperture and ultra-low distortion, which is applied to the machine vision field of intelligent security. The key points of its technical solution are as follows: It includes lens one, lens two, a cemented lens, a diaphragm, lens three, lens four, and lens five, which are arranged in sequence from the object plane to the image plane and rotate around the optical axis; the technical effect is that it can better reduce the distortion generated by the large aperture, and thus better improve the imaging quality. The system retains the optical design symmetric before and after the diaphragm, but introduces a group of doublet lenses to replace the single lens placed in front of the diaphragm instead of the traditional structure placed behind the diaphragm. Its main function is to converge the focusing positions of the chief rays and marginal rays in each field of view, and a heavy flint glass is specially arranged near the image plane of the system to correct the image plane curvature, correcting the original optical distortion of 5%-10% to within 0.1%.

This invention provides a catadioptric shortwave infrared imaging spectrometer, comprising, in order of light incidence, an entrance slit, a plane mirror, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a grating, and an imaging sensor. The plane mirror, together with the upper portions of the first, second, third, fourth, fifth, sixth, and seventh lenses, forms a collimation system. The grating, together with the lower portions of the seventh, sixth, fifth, fourth, third, second, and first lenses, and the imaging sensor, together form an imaging system. Collimation and imaging share a single lens group, resulting in a compact structure, easier aberration correction, simpler assembly and adjustment, better image quality, lower tolerance sensitivity, and reduced assembly difficulty.