170 results about "Aspheric lens" patented technology

The invention relates to a surface type correction and processing method of an aspherical lens, which comprises the following steps of: changing a radial point location of a polishing disk participating in cutting by adopting a rotary polishing disk and lens tangent layout and through three-axis linkage of numerical control X-axis radial feeding, numerical control B-axis swinging and Z-axis approaching movement, and forming differentiation by utilizing the linear velocity gradient of the disk to remove redundant materials of the lens; and surface shape error differential correction is realized. According to the method, the polishing head does not need to be frequently replaced, over-polishing / under-polishing of traditional air bag polishing is eliminated, and the single-piece machining time is shortened; an air bag structure is omitted, the service life of consumables is prolonged, and batch fluctuation is reduced; accumulative errors are reduced through three-axis linkage, and medium-high frequency ring belt errors are restrained. The matched processing method comprises the steps of initial forming, detection, planning, correction and the like, can be quickly adapted to lenses of multiple specifications, and efficiently completes high-precision batch manufacturing of medium and large-caliber aspheric surfaces.

The invention belongs to the technical field of laser, and particularly discloses a beam shaping system and method based on prism pair orthogonality and cascade, and the system comprises a single-mode fiber, an aspherical lens, a first prism pair, a first parallel plate, a second prism pair and a second parallel plate which are sequentially arranged along the direction of an optical axis. A Gaussian beam emitted by a single-mode optical fiber is collimated by an aspherical lens to form a parallel beam, the beam is expanded or compressed in the X direction by a first prism pair, the beam is expanded in the Y direction by a second prism pair, and two inclined parallel plates are respectively used for compensating the beam offset in the X / Y direction; according to the invention, the circular Gaussian beam emitted by the single-mode fiber can be shaped, a large strip-shaped collimation light spot with an adjustable length-width ratio from 4: 1 to 20: 1 and a long axis size of 30mm can be realized, and the central positions of the input and output beams in the cross section are ensured to be unchanged.

The wide-angle lens comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from an object plane to an image plane along an optical axis, the first lens is a glass spherical lens with negative focal power, the object side face of the first lens is a convex face, and the image side face of the first lens is a concave face. The second lens is a plastic aspheric lens with negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface. The third lens is a plastic aspheric lens with positive focal power, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface. The fourth lens is a plastic aspheric lens with positive focal power, the object side surface of the fourth lens is a convex surface or a concave surface, and the image side surface of the fourth lens is a convex surface. The glass spherical surface and the plastic aspheric surface are matched and combined, the resolution is improved, the total axis length is smaller than 10.5 mm, the aperture F can reach 1.6, the field angle FOV can reach 183 degrees, the relative illumination can reach 50%, and the lens has the advantages of being large in aperture, ultra-large in field angle, small in size and high in illumination.

The invention belongs to the technical field of optical thin film design and preparation, and particularly relates to a preparation method of a multilayer composite antireflection film on the surface of an optical lens. The preparation method comprises the step of sequentially performing atomic layer deposition on the surface of the optical lens to form the transition layer, the high-refractive-index layer, the low-refractive-index layer, the high-refractive-index layer and the packaging layer. According to the atomic layer deposition method, uniform coating can be achieved on the surfaces of aspherical lenses with different curvature radiuses, and five layers of oxide films are deposited through alternating pulse in an ALD pulse sequence with the structure of'substrate layer-transition layer-high refractive index layer-low refractive index layer-high refractive index layer-packaging layer '. And an excellent antireflection effect in a visible light wavelength range is realized. The atomic layer deposition is carried out at low temperature (25-150 DEG C), so that the atomic layer deposition can be directly coated on the high-molecular polymer lens, and the deformation of the base material due to high temperature is avoided; the method is especially suitable for different application scenes such as consumer electronics, personal protection and medical assistance.

The invention relates to an ultra wide angle pick-up lens suitable for a vehicle-mounted OMS system, an optical system of the lens is composed of 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 concave negative lens, the second lens is a meniscus concave negative lens, and the diaphragm is a meniscus concave negative lens. The third lens is a biconvex positive lens, the fourth lens is a biconvex positive lens, the fifth lens is a meniscus concave negative lens, the fourth lens and the fifth lens form an achromatic doublet lens, the first lens and the third lens are both made of glass materials and are spherical lenses, and the second lens, the fourth lens and the fifth lens are all plastic aspheric lenses. By adopting the glass-plastic mixed optical structure of the two glass spherical lenses and the three plastic aspheric lenses, the advantage of aberration correction of the aspheric lenses is brought into full play, high-definition imaging is met, the lens outer diameter is smaller, the optical total length is shorter, and miniaturization of the lens is ensured.

The invention provides a photoetching aberration compensation driving parameter disturbance precursor prediction method and system, and the method comprises the steps: firstly, synchronously capturing a frequency band compensation residual error sequence of 3 * 3 grid measurement points of an aspherical lens, intercepting 30ms window data, generating a time-frequency spectrum matrix through Hamming window STFT, and then extracting three feature vectors; inputting the feature vector into a two-layer LSTM predictor to output a disturbance probability P and pre-judgment time delta t and Pgt; 0.7, triggering the resetting of the driving parameters; dynamically adjusting the iteration step length and the driving voltage based on the P and the delta t, and outputting the iteration step length and the driving voltage to a compensator to generate compensation wavefront correction aberration; if the wavefront error RMS value is gt; and 0.05 lambda, only updating the weight of the LSTM output layer and performing re-prediction to form a closed-loop compensation process.

The invention discloses an optical imaging lens group, a scanning display device and application, and relates to the technical field of scanning display. The optical imaging lens group provided by the invention comprises six lenses which are sequentially arranged along a common optical axis from a first side to a second side, the second lens is a meniscus aspheric lens, the object side surfaces of the first lens and the second lens are convex surfaces, and the image side surfaces of the first lens and the second lens are concave surfaces; the fourth lens is a biconcave lens, the fourth lens and one of the third lens and the fifth lens adjacent to the fourth lens form a glued lens, and the focal power of the other lens is positive; the image side surface of the sixth lens is a convex surface, and the object side surface of the sixth lens is a concave surface; and the focal length value of the image side surface of the second lens and the ratio of the curved surface radius of the sixth lens to the working distance of the sixth lens are limited, and the optical imaging lens group adopts spherical and aspherical lenses, so that the number of the lenses is reduced, and the imaging quality is improved, and the application of the lens group in a long working distance is met.

The invention discloses a photoelectric co-packaging adapter plate and a photoelectric co-packaging device. A photoelectric co-packaging adapter plate comprises a first coating layer and a second coating layer which are formed on a substrate, and an optical waveguide arranged between the first coating layer and the second coating layer, and the refractive index of the optical waveguide is larger than the refractive index of the first coating layer and the refractive index of the second coating layer; a light emitting window is formed in the second coating layer, an aspherical lens is arranged on the light emitting window, a first reflecting part is arranged at the first end part of the optical waveguide, and the first reflecting part is used for forming a light path between the optical waveguide and the aspherical lens. According to the technical scheme provided by the invention, loss caused by mismatching of a micro-nano optical chip mode field and a silicon optical waveguide mode field is reduced, and alignment precision requirements between different modules are reduced.

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.

The invention discloses an optical-ultrahigh frequency combined sensing GIS partial discharge monitoring system and method. The system comprises an ultrahigh frequency detection unit, an optical detection unit and a signal composite output unit, wherein the ultrahigh frequency detection unit and the optical detection unit are arranged in parallel; the ultrahigh-frequency detection unit is used for detecting ultrahigh-frequency electromagnetic signals in the GIS cavity; the optical detection unit comprises a large-view-field optical lens, an optical conduction assembly and a photoelectric converter which are connected in sequence; the large-view-field optical lens is formed by combining a plurality of aspherical lenses, and the large-view-field optical lens is used for converging optical signals in the GIS cavity; the optical conduction assembly comprises an optical fiber bundle which is used for receiving and conducting optical signals; the photoelectric converter comprises a silicon photomultiplier tube or a photomultiplier tube, and is used for converting a weak optical signal into an electric signal; the signal composite output unit is respectively connected with the ultrahigh frequency detection unit and the optical detection unit, and the signal composite output unit is used for outputting signals of the ultrahigh frequency detection unit and the optical detection unit.

An optical system of the lens is composed of a first lens, a second lens and a third lens which are sequentially arranged from left to right along a light incident light path, the first lens is a plano-convex lens with positive focal power, the object side face of the first lens is a convex face, and the image side face of the first lens is a plane; the second lens is a meniscus lens with positive focal power, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens is a meniscus lens with negative focal power, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the first lens is a glass spherical lens, and the second lens and the third lens are plastic aspheric lenses. A glass-plastic mixed optical system is formed by one glass spherical lens and two plastic aspheric lenses, and the lenses have high resolution, low distortion and low temperature drift 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, and can clearly image at the temperature of-40 DEG C to 105 DEG C; the total length of the lens is greatly shortened, and miniaturization requirements are met.

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.

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.

The invention relates to the technical field of optical imaging, in particular to a low-cost large-aperture high-definition vehicle-mounted lens and an imaging method thereof.The optical system of the lens is composed of a first lens body, a second lens body, a third lens body, a diaphragm, a fourth lens body, a fifth lens body and a sixth lens body which are sequentially arranged from the object side to the image side along the optical axis; wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lens are glass spherical lenses, and the sixth lens is a glass aspheric lens. The lens material is reasonably selected, and the focal power, the surface type and the diaphragm position of each lens are reasonably distributed, so that the lens has the advantages of large aperture, high resolution, athermalization function, large clear aperture, high light transmission capability and bright and clear imaging pictures in different light environments; meanwhile, short-wave chromatic aberration is considered, and it is guaranteed that the imaging picture does not have the purple edge phenomenon.

The application discloses a wide-angle projection lens, which can comprise a first lens group, a second lens group and a third lens group; wherein the first lens group comprises at least one meniscus aspherical lens for eliminating distortion aberration; the second lens group comprises at least one movable lens for obtaining clear pictures at different projection distances by moving the at least one movable lens; and the third lens group comprises at least one set of cemented lenses for eliminating chromatic aberration. The wide-angle projection lens provided by the application has a simple and reasonable structure, can obtain clear pictures in a wide range through cooperation between the lens groups, has high imaging quality, small picture distortion and can match high-lumen projectors. The field of view of the projection lens is increased, the high projection quality is ensured, and the wide-angle projection lens is worthy of large-area popularization and use.

The application relates to the technical field of optical processing, and provides a zinc selenide aspheric lens and a numerical control polishing process thereof, which is carried out by using a numerical control polishing machine, comprises main steps of rough polishing, fine polishing, finishing and the like, and process parameters are adjusted according to the characteristics of zinc selenide, so that the zinc selenide aspheric lens with a diameter of less than 320 mm can be polished, the global surface type PV of the zinc selenide aspheric lens is controlled to be less than 0.3 microns by means of the numerical control polishing machine, white zinc metal particles generated due to heating of the lens surface in the polishing process are avoided, the surface smoothness of the finished product reaches 60 / 40, and the laser level is reached. The application also has reference significance for polishing the surface of zinc selenide with a diameter of more than 320 mm.

The embodiment of the application discloses a fixed focus lens, which 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 arranged in sequence along an optical axis from an object plane to an image plane; the first lens is a negative focal length lens, the second lens is a negative focal length plastic aspheric lens, the third lens is a positive focal length plastic aspheric lens, the fourth lens is a positive focal length glass lens, the fifth lens is a positive focal length plastic aspheric lens, the sixth lens is a negative focal length plastic aspheric lens, the seventh lens is a positive focal length plastic aspheric lens, and the eighth lens is a positive focal length plastic aspheric lens. By adopting the technical scheme, the fixed focus lens comprises eight lenses, the focal lengths and surface shapes of the lenses are reasonably distributed, the design of the fixed focus lens with excellent comprehensive performance which takes into account imaging requirements and compact structure is finally realized, and the comprehensive performance meets the use requirements of a general sensor of security monitoring.

This application provides an optical-mechanical lens module and an AR optical display device. The optical-mechanical lens module includes, along the optical axis from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens, the third lens, and the fourth lens all have positive optical power, while the second lens and the fifth lens both have negative optical power. The refractive index Nd3 of the third lens is 1.48 ≤ Nd3 ≤ 1.59, and the refractive index Nd5 of the fifth lens is 1.9 ≤ Nd5 ≤ 1.95. All lenses from the first lens to the fifth lens are aspherical glass lenses. The total optical length TTL of the optical-mechanical lens module is < 12 mm. The sagitta of the object side of the fifth lens at its maximum aperture is S5, and satisfies: 0.1 < S5 / TTL < 0.35.

The invention relates to a visible light projection refraction and super hybrid lens and projection equipment, and belongs to the technical field of optical devices, and the lens sequentially comprises a first lens, a second lens and a third lens from an object plane to an image plane along an optical axis; the first lens is a refractive aspheric lens, and the second lens and the third lens are super lenses. According to the invention, the technical scheme of folding and super mixing is adopted, the system chromatic aberration can be effectively corrected, and high-definition imaging is realized.

The invention discloses a laser conduction system for femtosecond, which comprises a contact lens, at least two bonding lenses, at least one first aspheric lens and at least one second aspheric lens, and is characterized in that the contact lens is provided with a contact concave surface for contacting with human eyes; wherein the two bonding lenses are arranged on the other side opposite to the contact concave surface of the contact lens at intervals, and the first aspherical lens and the second aspherical lens are also arranged on the other side opposite to the contact concave surface of the contact lens. And the generated laser passes through the first aspherical lens, the second aspherical lens and the two bonding lenses, and then passes through the contact lens to form a laser spot at a preset distance away from the contact concave surface.

The invention relates to a 2 million-pixel DMS refraction and super lens, a camera module and a system, and belongs to the field of optical lenses. The 2 million-pixel DMS refraction and super lens comprises a first lens, a second lens and a third lens which are sequentially arranged from an object plane to an image plane along an optical axis; the first lens is an aspherical lens with positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the object side surface and the image side surface of the first lens are aspheric surfaces; the second lens is a metasurface lens, the object side face of the second lens is a plane, and the image side face is provided with a microstructure array. The third lens is an aspherical lens with positive focal power, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the object side surface and the image side surface of the third lens are aspheric surfaces. According to the technical scheme of folding and super mixing, two traditional resin lenses and one super lens are added, and 890-990nm broadband high-resolution imaging is achieved.

The application discloses a kind of optical aspheric lens repair polishing integrated processing device and method, the device includes profiling tool, liquid supply pump, polishing liquid tank, adsorption fixture, rotating platform, rotating motor and three-axis motion platform.The present application designs corresponding profiling tool according to the surface profile curve of target aspheric lens, first by contact processing, quickly remove material, obtain the surface profile close to aspheric lens, then continue to use the profiling tool to use shear thickening polishing method to the aspheric lens after profiling is carried out non-contact polishing, obtain high quality high surface profile precision aspheric lens, while due to not needing to replace processing tool and processing equipment, can greatly improve processing efficiency.The profiling tool designed in the present application obtains better aspheric lens surface profile precision with higher material removal rate in the profiling stage, and in the polishing stage, non-contact mode is used, and high surface profile precision and surface quality can be adaptively realized.

The application discloses an optical lens, which comprises, along the optical axis, from the object plane to the imaging plane, a first lens with negative focal length, the object side of which is concave near the optical axis, and the image side is concave; a diaphragm; a second lens with positive focal length, the object side of which is convex, and the image side is convex; a third lens with negative focal length, the image side of which is concave; a fourth lens with positive focal length, the object side of which is concave near the optical axis, and the image side is convex; a fifth lens with positive focal length; a sixth lens with negative focal length, the image side of which is concave near the optical axis; and a filter without focal length. The optical lens of the application adopts six aspheric lenses with focal length and one filter without focal length, and has the advantages of large field of view, short total length and high resolution.

The invention discloses a critical focal length active intervention-based myopia correction intelligent glasses system and a training method, and relates to the technical field of vision correction. The system adopts an ultrathin aspherical lens (refractive index 1.74) design, focuses 12-45-year-old 0-600-degree myopic users, and realizes personalized intervention through a degree segmentation training model; the core method comprises the following steps: detecting a real degree D0 for multiple rounds, calculating a critical compensation degree D2 constrained by hardware in combination with a visual object distance L, taking the D2 as a unique reference for visual training and close-range active intervention, dynamically adjusting the training intensity, and carrying out progressive intervention on close-range eye use. According to the method, the scientific theory, the ultrathin lens design and the degree segmentation adaptation are deeply combined for the first time, the core innovation lies in a closed-loop system of critical focal length unified calculation and training and intervention sharing the same reference, the pain points that in the prior art, the theory cannot fall to the ground and the height number wearing experience is poor are solved, creativity and falling performance are achieved, and the method is suitable for large-scale popularization and application. The glasses can achieve degree control and vision recovery, meet daily wearing requirements, and have remarkable practical value and innovation value.

The application provides an optical mechanical module and a near-eye display device; the optical mechanical module comprises, in sequence from an object side to an image side along an optical axis, a first lens group, an X-Cube prism and a second lens group; the first lens group is composed of a first lens, a second lens, a third lens and a fourth lens; the first lens is a plastic aspheric lens with negative focal power; the second lens is a plastic aspheric lens with positive focal power; the third lens is a plastic aspheric lens with negative focal power; the fourth lens is a glass aspheric lens with positive focal power; the second lens group is arranged on one side of the X-Cube prism, and the second lens group comprises a fifth lens and a display chip; the fifth lens is a plastic aspheric lens with negative focal power; the center thicknesses of the first lens, the second lens, the third lens and the fourth lens are T1, T2, T3 and T4 respectively, and 0.6 < (T1+T2) / (T3+T4) < 1 is satisfied.

The invention belongs to the technical field of precise optical measurement, particularly relates to a method and a device for measuring the curvature radius of a nano-precision aspherical lens, and provides the following scheme aiming at the problems that the curvature is calculated indirectly through rise in the existing process of measuring the curvature radius of the aspherical lens, the process is easily interfered by errors, and the measurement accuracy is influenced. The method comprises the following steps: S1, clamping a to-be-measured lens, and adjusting an optical axis; s2, moving a to-be-measured lens to a focus of a fixed measurement light path, and carrying out concurrent alignment; s3, a Gaussian measurement light beam is emitted and received; s4, planning a virtual spherical surface, and performing virtual sphere center space scanning; according to the method, error amplification is fundamentally avoided through a direct measurement principle of virtual sphere center scanning and wavefront matching, so that nano-precision and absolute measurement of curvature radiuses at any point of various aspheric lenses is realized, a whole-situation surface shape can be further inverted through multi-point and multi-parameter measurement, and the measurement precision is improved.

The present application relates to the technical field of aspheric lens grinding processing, and particularly relates to an ultra-precision grinding device for aspheric lenses of infrared materials, comprising a grinding machine body, a fixed seat is fixedly arranged in the grinding machine body, a rotating frame is rotatably arranged on the fixed seat, an automatic unloading mechanism is slidingly arranged on the rotating frame, a cover is slidingly arranged on the fixed seat, and a machine cover is rotatably arranged on the grinding machine body. After the aspheric lens is ground, a vacuum pump is used to generate negative pressure to adsorb and take down the aspheric lens, and the aspheric lens is placed on an aspheric lens placing seat. The device replaces the traditional manual operation of taking out the lens, and the automatic taking and placing of the lens can reduce the errors and potential damage caused by manual intervention, and can continuously and efficiently work in a high-yield environment, avoid human fatigue, effectively improve the production efficiency of the aspheric lens, ensure the processing precision, and reduce the influence of human factors on the product quality.

The invention relates to a small-sized low-cost CCTV wide-angle prime lens and an imaging method thereof, the small-sized low-cost CCTV wide-angle prime lens comprises an optical system, and the optical system is composed of a first lens, a second lens, a diaphragm, a third lens and a fourth lens which are sequentially arranged from left to right along a light incident light path; the first lens is a meniscus concave negative lens, the second lens is a biconvex positive lens, the third lens is a biconvex positive lens, and the fourth lens is a biconcave negative lens. The optical lens is simple in structure and reasonable in design, the optical structure that one glass lens is matched with three plastic lenses is adopted, the advantage of aberration correction of the aspherical lens is fully played, high-definition imaging is met, meanwhile, the optical lens has the smaller outer diameter of the lens and the shorter optical total length, miniaturization of the lens is guaranteed, and higher optical performance stability is achieved; and meanwhile, the cost is reduced while the system adapts to the environment, and the system has the advantages of relatively high imaging definition, large clear aperture, relatively low tolerance sensitivity, relatively good high and low temperature stability and the like, and can monitor a target more comprehensively.

The invention relates to a laser beam shaping system. The laser beam shaping system comprises a laser light source used for generating an initial light beam; the aspherical lens group is arranged on a propagation path of the laser beam and comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from the object space to the image space along the incident direction of the light source; wherein the first lens and the second lens are plano-concave aspheric lenses and both have negative focal lengths; the third lens is a biconcave aspheric lens and has a negative focal length; the fourth lens is a biconvex aspheric lens and has a positive focal length; the initial light beam is collimated by the lens group to form a target flat-topped light beam, and meanwhile, the aperture of the light beam realizes beam expansion of a preset multiplying power.

The application provides a long-wave athermal optical imaging lens, comprising, in sequence from an object side to an image side of a light path, a first lens of a meniscus lens with positive refractive power, a second lens of a double-concave lens with negative refractive power, a third lens of a meniscus lens with positive refractive power, and a fourth lens of a meniscus lens with negative refractive power; wherein the lens material types of the first lens, the second lens, the third lens and the fourth lens are at least three; the lens material comprises sulfide glass, ZnS crystal and germanium crystal. The application eliminates the thermal difference and the chromatic aberration of the optical system through the combination of different lens materials and the surface type design of the aspheric lens, so that the optical imaging lens can clearly image without re-focusing under the condition that the working spectrum is 8-12 mu m and the working temperature is -40 DEG C to 60 DEG C, and is suitable for application in the fields of security and protection, unmanned aerial vehicle, industrial monitoring, temperature measurement, forest fire prevention and the like.