166 results about "Athermalization" patented technology

The invention relates to the technical field of optical elements, in particular to a long-focus athermalization lens for short-wave near-infrared imaging. The first lens group, the diaphragm and the second lens group are sequentially arranged in the lens barrel from an object side to an image side, the first lens group is used for carrying out aberration correction on incident light, and the diaphragm is used for limiting the light passing quantity of the incident light; the second lens group is used for performing residual aberration correction on the light passing through the first lens group and the diaphragm; the first lens group comprises a first lens, a second lens, a third lens and a fourth lens, the first lens and the second lens are glued to form a first compound lens, and the third lens and the fourth lens are glued to form a second compound lens; from the object side to the image side, the second lens group comprises a fifth lens and a sixth lens. According to the long-focus athermalization lens provided by the invention, an optical passive athermalization technology is adopted, and short-wave near-infrared high-quality clear imaging can be realized in a wide temperature range without focusing.

The invention provides an infrared target simulator focusing collimation projection optical system and a design method thereof. The optical system is composed of a telescope objective, an intermediate field lens and a relay lens group. A source target and a background image generated by the infrared target simulator are input into the DMD and then are incident to the focusing collimation projection optical system through the DMD, the incident light firstly passes through the relay lens group and the intermediate field lens to generate a primary image of the image on the DMD, and then the primary image surface is collimated and projected to an entrance pupil of a tested photoelectric device through the telescope objective. According to the invention, optical material parameters are finely analyzed and matched, three infrared optical materials are adopted to form a lens group, a field lens is added to compress the aperture of a light beam, and only five lenses are used, so that achromatism and athermalization are realized while high transmittance is ensured. And a focusing lens group and a precise mechanical structure are arranged in the relay lens group, so that the target simulation requirement of photoelectric detection equipment such as a guide head at a wider working temperature range is met, and meanwhile, the requirement of obtaining a clear simulation target scene by matching detected photoelectric equipment with different working distances can be met.

The invention discloses a low-distortion athermalization correctable short-wave infrared optical system and a lens, and belongs to the technical field of optics. According to the system, an optical lens is additionally arranged at the rear end to serve as a correction lens to achieve image correction in an external field environment; passive athermalization under wide-temperature and vacuum conditions is realized through focal power distribution and material matching of each optical lens; all the lenses are set to be spherical surfaces, so that the influence of aspheric surface processing errors on system index precision, processing cost and system installation and adjustment is avoided; the system adopts a positive-negative-positive-negative-negative five-lens focal power configuration. The positive-negative-positive-negative lenses are located at the front end, and the last negative lens is located at the rear end. The five lens materials are zinc sulfide, a chalcogenide material, single crystal barium fluoride, single crystal calcium fluoride and a chalcogenide material in sequence; the correction lens is located at the rear end of the last negative lens. The short-wave infrared optical system can solve the problems that an existing short-wave infrared optical system is large in imaging distortion, or athermalization is not achieved, or image correction under the external field application condition cannot be achieved.

The invention discloses an optical system of an infrared thermal imager, and the system comprises a super-structure lens module which employs a silicon-based super-structure lens, and achieves 3-5 [mu] m and 8-12 [mu] m multi-band focusing through a single sheet; the free-form surface lens is matched with the super-structure lens to correct asymmetric aberration; the multi-view-field switching mechanism is used for driving a zoom group through a micro stepping motor to realize switching between a wide angle and a narrow angle; the active athermalization compensation unit comprises an MEMS driver and a temperature sensor, and the lens spacing is dynamically adjusted through closed-loop control; and the intelligent processing module is integrated with an embedded FPGA processor and operates a deconvolution algorithm to suppress diffraction stray light at the edge of the super-structure lens. According to the optical system of the infrared thermal imager, the problems that a traditional infrared optical system is large in size, high in weight and poor in environmental adaptability are solved through the innovative optical design and manufacturing process, and efficient and long-time patrol flight detection of the unmanned aerial vehicle-mounted infrared thermal imager is achieved.

The invention relates to a broadband short-wave infrared athermalization optical system. The optical system is a transmission type optical system. The structure of the optical system is a coaxial structure; the optical system is provided with a first positive lens, a first negative lens, a second positive lens, a second negative lens and a third negative lens in sequence in the light incidence direction. Light rays are converged through the lenses and are incident on the focal plane of the detector. According to the optical system provided by the invention, only five common infrared optical material lenses are used and matched with an aluminum alloy lens cone material, confocal imaging in a broadband range of 1.0 mu m-2. 5 mu m can be realized, the relative aperture is not greater than 1 / 0.4, athermalization of the optical system is realized, and the optical system is easy to manufacture, high in imaging quality and good in stability.

The invention relates to a small-sized light-weight large-target-surface infrared athermalization optical system, and the optical system consists of a first meniscus positive lens, a meniscus negative lens, a second meniscus positive lens and a third meniscus positive lens which are sequentially and coaxially arranged from an object side to an image side, the second meniscus positive lens and the third meniscus positive lens are the same lens, the first meniscus positive lens, the second meniscus positive lens and the third meniscus positive lens are all made of chalcogenide glass IRG206, and the optical system ensures that edge imaging is clear and the image surface diameter reaches 20mm through optimal arrangement of focal power and optical materials of all the lenses and intervals among all the lenses, so that the image quality is improved. The long-wave infrared imaging device can adapt to a 1280 * 1024 array and a long-wave uncooled infrared detector with the pixel size of 12 microns, and has the advantages of high imaging quality, small size and light weight.

This application discloses an imaging device with an operating temperature range of -40℃ to +60℃, comprising a 4K high-definition lens and a detector for receiving images captured by the 4K high-definition lens. The 4K high-definition lens has a focal length of 50mm, a relative aperture of 1.25, and operates in dual bands: 0.43~0.656μm and 0.7~1μm. The detector has a pixel count of 3840×2160 and a pixel size of 2.9μm. The 4K high-definition lens employs a heat-free design using domestically produced spherical glass, resulting in a simple, compact structure and small size. It utilizes a high-dispersion material lens and a low-dispersion material glass bonded together to achieve dispersion matching. The combination of different lenses and the rational allocation of optical power ensure excellent optical performance. Furthermore, it is suitable for imaging in high-brightness daytime and low-light nighttime environments and can switch bands for imaging, ensuring clear images both day and night.

The utility model relates to an imaging lens, which sequentially comprises a first lens group with positive focal power, a second lens group with negative focal power and a third lens group with positive focal power along an optical axis from an object side to an image side, the first lens group and the third lens group are fixed lens groups, and the second lens group is a focusing group; the first lens group comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power; the second lens group comprises a fifth lens with positive focal power and a sixth lens with negative focal power; the third lens group comprises a seventh lens, an eighth lens and a ninth lens, wherein the seventh lens and the eighth lens are opposite in focal power, and the ninth lens is positive in focal power. The imaging lens at least has one of the characteristics of wide object distance, low distortion, high illumination, no virtual focus at high temperature, athermalization and the like.

The invention relates to an athermalization optical system. The system comprises a protection window, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an optical filter, a detector window and an image plane which are sequentially arranged in the light propagation direction and share the same optical axis. The first lens is a negative meniscus lens protruding towards the object side. The second lens is a biconcave lens; the third lens is a biconvex lens; the fourth lens is a positive meniscus lens protruding towards the object side. The fifth lens is a negative meniscus lens protruding towards the object side. The sixth lens is a biconvex lens; the seventh lens is a biconcave lens; the eighth lens is a biconvex lens; the ninth lens is a negative meniscus lens protruding towards the image space. The tenth lens is a biconvex lens; the surface of each lens is a spherical surface; the diaphragm is arranged on the front surface of the sixth lens. The optical system has the advantages of large field of view, high-resolution imaging, simple and reliable structure, high assembly efficiency and capability of being produced on a large scale.

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 invention discloses an aviation surveying and mapping lens optical system and a lens, particularly discloses a long-focal-length passive athermalization aviation surveying and mapping lens optical system and a lens, and solves the problems that an existing aviation surveying and mapping lens cannot meet the requirements of long-distance and high-precision surveying and mapping and cannot have long focal length, miniaturization and wide temperature adaptability at the same time. The lens optical system comprises a primary lens, a diaphragm, a secondary lens and an aberration correction lens group, the diaphragm is arranged on a reflection light path of the primary mirror; the secondary mirror is arranged on one side, deviating from the primary mirror, of the diaphragm; the aberration correction lens group is arranged in the central through hole of the primary lens; light in a target area enters the primary mirror, passes through the diaphragm to enter the secondary mirror after being reflected by the primary mirror, reversely passes through the diaphragm to enter the aberration correction mirror group after being reflected by the secondary mirror, and then is imaged; the curvature radiuses of the vertexes of the reflecting surfaces of the primary mirror and the secondary mirror are respectively-400mm to-360mm and-220mm to-180mm; the axial interval between the primary mirror and the secondary mirror is-140 mm to-120 mm.

The utility model particularly relates to an infrared short-focus athermalization lens assembly suitable for smart home, which comprises a lens body, a lens is arranged in the lens body, an adjusting knob is arranged on the outer wall of the left end of the lens body, a protection assembly is arranged on the lens body, and the lens body is connected with the lens through the protection assembly. A buffering assembly is arranged on the outer wall of the lens body, the protection assembly is arranged on the lens body, the sliding rod is driven by the restoring force of the first spring to slide in the sliding groove in a reset mode, the sliding rod drives the inner wall of the protection cover to be attached to the outer wall of the lens body, and therefore the purpose that the protection range of the protection cover to the lens body and the lens is increased is achieved. And the protective cover drives the rotating rod to rotate in the sliding rod, so that when the protective cover is not used, the protective cover is driven by the rotating rod to rotate to the top of the lens body to stay, and the protective cover is not easy to lose when the protective cover is not used.

The invention provides a light unmanned aerial vehicle carried long-wave infrared athermalization optical system and a design method thereof, and relates to the technical field of optical instruments, and the optical system comprises an object plane, a first lens, a diaphragm, a second lens, a third lens and a detector image plane which are sequentially arranged from a light source to a detector in the propagation direction of incident light; the first lens and the third lens are meniscus negative lenses with negative focal power, and the second lens is a biconvex positive lens with positive focal power; wherein the front surface of the first lens is a diffraction surface, and the rear surface of the first lens is a spherical surface; the front surface of the second lens is an even-order aspheric surface, and the rear surface is a spherical surface; the front and rear surfaces of the third lens are spherical surfaces. According to the optical system, the high resolution, the large relative aperture and the optical passive athermalization function are achieved, light weight and non-toxicity of materials can be achieved under the condition that the large aperture is considered, the flight time of the unmanned aerial vehicle is prolonged, the resolution is improved, and the adaptive environment temperature is high.

The application provides an optical system and an optical lens working in a far-infrared wave band, which sequentially comprises, along an optical axis, from an object side to an image side: a first chalcogenide refractive lens, a superlens, and a second chalcogenide refractive lens; the first chalcogenide refractive lens and the second chalcogenide refractive lens are both positive lenses; the superlens comprises a substrate and a superstructure unit, and the superstructure unit is provided with micro-nano structures; the optical system satisfies the following condition with a unit of 1 / mm: 0.25<=n*(|C1|+|C2|)<=2.01; wherein, when n is the refractive index of the first chalcogenide refractive lens, C1 is the curvature of the front surface of the first chalcogenide refractive lens, and C2 is the curvature of the back surface of the first chalcogenide refractive lens; when n is the refractive index of the second chalcogenide refractive lens, C1 is the curvature of the front surface of the second chalcogenide refractive lens, and C2 is the curvature of the back surface of the second chalcogenide refractive lens. The optical system provided by the application can simultaneously meet the requirements of good imaging quality, small size, sufficient athermalization, and high lens processability of the optical system.

The invention provides a Gamma lens and an industrial camera comprising the Gamma lens, the Gamma lens is an optical imaging system, and the Gamma lens sequentially comprises a first lens to a ninth lens with specific diopters and surface types and a diaphragm from an object side to an image side along an optical axis; by optimizing lens configuration, material matching and optical parameters, the problems of small target surface, easy thermal defocus, small inclination angle, small numerical aperture and the like in the prior art are effectively solved; the lens has the advantages of a large imaging target surface (the diameter of an imaging ring is 22 mm), good athermalization performance (the working temperature range is-20 DEG C to + 60 DEG C), a large object plane inclination angle (larger than 50 degrees), a large numerical aperture (NA = 0.12), a specific working wave band (395-415 nm) and the like, and the imaging quality, the environmental adaptability and the measurement precision in the fields of machine vision, 3D measurement and the like are remarkably improved; the invention also discloses an industrial camera comprising the Sammer lens.

The application provides a high-pixel forward-looking intelligent driving optical system and an applied camera module. The optical system is sequentially composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. Through reasonable distribution of the surface shape and the optical power of each lens, the volume of the optical system can be effectively reduced, the performance of a large target surface, a large aperture and high pixels is achieved, the optical system has the unique advantages of stable performance, high pixels, a large aperture, a large target surface, no thermalization and no ghost image, and the driving safety of the driver and passengers can be more effectively protected.

The invention provides chalcogenide glass with a negative refractive index temperature coefficient as well as a preparation method and application of the chalcogenide glass, and belongs to the technical field of infrared chalcogenide glass. The chemical formula of the chalcogenide glass provided by the invention is As < x > Se < 100-x >, and x ranges from 20 to 36. By optimizing the chemical formula of the chalcogenide glass, the refractive index and the dn / dT value of the chalcogenide glass can be controlled, and the dn / dT value of the chalcogenide glass is negative, so that the characteristic that the refractive index generated by a conventional lens changes along with the temperature can be effectively compensated, and the heat effect is reduced or even eliminated; the linear refractive index value of the chalcogenide glass provided by the invention is reduced along with the increase of the dn / dT value, so that the chalcogenide glass can be used as a passive athermalization lens element in an infrared system, and is of great significance to athermalization of the system. The result of the embodiment shows that the dn / dT value of the chalcogenide glass provided by the invention is-45 to-19 ppm / K, and the refractive index of the chalcogenide glass is 2.61 to 2.68.

The invention relates to the technical field of optical lenses, in particular to an athermalized ultra-wide-angle lens, which comprises a lens barrel, and a first lens group, a diaphragm and a second lens group which are coaxially arranged in the lens barrel in sequence, from the object side to the image side, the first lens group comprises a first lens, a second lens, a third lens and a fourth lens which are arranged in sequence, and the second lens group comprises a fifth lens, a sixth lens and a seventh lens which are arranged in sequence. Wherein the first lens is a fisheye-type meniscus negative lens, and the concave surface of the first lens faces the image space; the second lens and the third lens are meniscus negative lenses, and the concave surfaces of the second lens and the third lens face the image space. The fourth lens is a positive lens; the fifth lens, the sixth lens and the seventh lens are all positive lenses. The field angle of the lens provided by the invention reaches 185 degrees, and all objects right ahead can be shot comprehensively without dead angles; the aperture value can reach 1.4, and rapid imaging can be realized; and the lens can adapt to an environment with a temperature range of-40 DEG C to 80 DEG C, and covers most of outdoor temperature environments, so that the adaptability of the lens to the environment is effectively improved.

The invention provides an optical antenna structure with a wide temperature adaptation range, which comprises a plurality of optical lenses, each optical lens is sleeved with a gasket, the optical lenses provided with the gaskets are fixed in a lens barrel through a pressing ring, a space ring for separating the optical lenses is further arranged in the lens barrel, and a solar optical filter is arranged at the front end of the lens barrel; the optical lens is made of optical glass with low heat sensitivity, the lens cone is made of an aluminum alloy material, the space ring is made of an invar steel material, the gasket is a graphene gasket subjected to anti-oxidation treatment, and the solar optical filter is made of microcrystalline glass and is coated with an aluminum film. The athermalization design is carried out by selecting an optical structure material with a low thermal expansion coefficient, so that the optical antenna structure can keep stable performance in a larger temperature range, and the possibility of mechanical deformation or rigid body displacement of the optical antenna structure in a space extreme temperature environment is further reduced.

The invention relates to the technical field of cooling optical elements, in particular to a chalcogenide material-based long-wave refrigeration athermalization optical system, which comprises temperature behavior recognition, acquisition of material temperature thickness focus feedback and analysis of a master control behavior sequence, optical path response, extraction of lens actions and generation of a priority sequence, the perturbation effect sequences the lens response according to the deformation frequency, the actuation linkage constructs a synchronous driving path and keeps continuous response, and the focal level drift alignment corrects the lens group according to the image change and stabilizes the performance. Through multi-source feedback parallel analysis, temperature, thickness and focus changes form a traceable chain unified reference, a potential change lens is exposed in advance by comparing lens actions and optical path arrangement, the disturbance degree corresponding to the adjustment syn-position is determined through the displacement frequency, actuation coherence is maintained through path switching, and the adjustment direction is guided through image differences. And the image is kept stable and consistent in dynamic cooling.

The utility model discloses a two-piece optical athermalization lens which comprises a first lens and a second lens which are sequentially arranged from the object side to the image side along the optical axis, the first lens is a meniscus negative lens with the convex face facing the object side, the second lens is a biconvex lens, the focal length of the lens is f, the focal length of the first lens is f1, and the focal length of the second lens is f2, the curvature radius of the intersection point of the object side surface of the first lens and the optical axis is R1, the curvature radius of the intersection point of the image side surface of the first lens and the optical axis is R2, the curvature radius of the intersection point of the object side surface of the second lens and the optical axis is R3, and f, f1, f2, R1, R2 and R3 meet the following relations:-5.6 < f1 / f <-4, 0.6 < f2 / f < 1.2, 1.3 < R1 / R2 < 2.5, and 4.4 < R3 / R1 < 5.4. The athermalization lens can realize the characteristic of temperature self-adaptive optical athermalization, is simple in structure, small in size and light in weight, and can meet the use requirements of a miniaturized uncooled infrared optical system. The utility model further discloses an imaging device.

The application discloses an infrared large-view-field wide-spectrum multi-spectrum imaging spectrometer optical system, which is coaxially arranged in sequence from an object plane to a focal plane as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a filter wheel; the first lens and the fourth lens are meniscus positive lenses, the second lens, the third lens and the fifth lens are meniscus negative lenses, and the sixth lens is a double-convex positive lens. The application adopts common chalcogenide and zinc selenide crystal infrared materials, corrects aberration and chromatic aberration by optimizing surface shape parameters of each surface and adopting aspheric surfaces, realizes high-quality imaging in a wide waveband range of 2.5-15 mu m, has the characteristics of large view field, small distortion, athermalization and super-long back intercept, is easy to produce and adjust, has strong versatility, and can be applied to the fields of monitoring of chemical harmful gases, environmental protection, agriculture and food safety, medical treatment and health and judicial identification.

The application discloses a compact athermal high-definition wide-angle optical system, which comprises, in sequence from an object side to an image side along an optical axis, a first lens with negative focal power, the object side of which is a convex surface and the image side of which is a concave surface; a second lens with positive focal power, the object side of which is a concave surface and the image side of which is a convex surface; a third lens with positive focal power, the object side of which is a convex surface and the image side of which is a convex surface; a fourth lens with positive focal power, the object side of which is a convex surface and the image side of which is a convex surface; a fifth lens with negative focal power, the object side of which is a concave surface and the image side of which is a convex surface; and an infrared filter, which is located between the fifth lens and an imaging surface; the third lens is a glass spherical lens, the first lens, the second lens, the fourth lens and the fifth lens are plastic aspherical lenses, and a diaphragm is arranged between the second lens and the third lens. The full field modulation transfer function (MTF) is greater than 50% at 100 lp / mm, the maximum field of view is 140°<FOV<156°, the total optical length (TTL) is less than 15.1 mm, and the working waveband is 400-700 nm.

The invention provides an athermalization high-definition projection lens. A front positive lens group, a diaphragm and a rear positive lens group are sequentially arranged from an object plane to an image plane. The front positive lens group comprises a first lens to a fourth lens, the rear positive lens group comprises a fifth lens to a ninth lens, and the fifth lens, the sixth lens and the seventh lens form a closely connected glued positive lens group. The second lens is a leftward-bent meniscus-shaped glass aspheric negative lens or a leftward-bent meniscus-shaped plastic aspheric negative lens, and the other lenses are meniscus-shaped glass negative lenses, double-concave-surface glass negative lenses or double-convex-surface glass positive lenses. Through the optimized combination scheme design between lens structures, the configuration structure of nine lenses is adopted, the focal length of the lens is not out of focus when the lens works in the environment range from the low temperature of-20 DEG C to the high temperature of + 60 DEG C, and the lens I to the lens IX integrally move left and right in the optical axis direction, so that the image focusing is clear when the projection imaging range is from 0.5 m to infinity.

This invention belongs to the field of infrared lens design and manufacturing technology, and relates to a large-aperture 2K resolution infrared lens. The infrared lens, along the light incident direction, sequentially comprises a first lens with negative optical power, a second lens with positive optical power, a third lens with positive optical power, a fourth lens with negative optical power, a detector protective glass, and an imaging target surface for the detector. The first, second, third, and fourth lenses are all convex surfaces in the light incident direction and concave surfaces in the opposite direction. This invention provides a large-aperture 2K resolution infrared lens with a thermal-free design, capable of normal operation within a temperature range of -40℃ to 50℃, and compatible with 1920*1080@8μm uncooled long-wave infrared detectors. It features a large aperture, simple structure, and large imaging target surface size.

The invention relates to the field of lenses, in particular to the field of long-wave infrared lenses, and particularly provides an infrared continuous zoom lens which is characterized in that a front fixed group lens, a zoom group lens, an imaging compensation group lens, a rear fixed group lens and a temperature compensation group lens are sequentially arranged from an object space to an image space along an optical axis; all the lenses are lenses made of non-germanium materials with the same mark, and the material of the lenses meets 2.4 lt; n10.6 lt, n10.6 lt; 3.3, 93 lt; v10.6 lt, v10.6 lt; 210, 210; the F number of the lens is F1.2 to F1.0; the front fixed group lens and the rear fixed group lens are fixed, the zooming group lens and the imaging compensation group lens can move along the optical axis to realize a zooming function, and the temperature compensation group lens can move along the optical axis to realize far and near focusing and temperature drift correction. The lens is large in relative aperture, good in optical axis stability and compact in structure, has a certain passive athermalization capability in a range from-40 DEG C to 60 DEG C, and realizes whole-process clearness of zooming at different temperatures.

The invention provides an athermalization space debris detection optical system. According to the scheme, the field curvature and color are corrected by adopting negative-positive-negative-positive-positive-positive-positive-negative and corresponding refractive index combination according to the focal power of a system lens; besides, the first negative lens adopts negative focal power to increase the relative aperture, SILICA is adopted as a material for radiation resistance, the optical system is prevented from using a radiation-proof flat window, the weight of the optical system is reduced, and the length of the optical system is reduced; moreover, in the temperature range of-10 DEG C to 50 DEG C, the size of optical defocused spots in the full field of view of 14 degrees is balanced, and the system distortion is small.

The invention discloses a glass-plastic hybrid passive athermalization projection lens and system. The glass-plastic hybrid passive athermalization projection lens is sequentially provided with a first lens, a second lens, a third lens and a fourth lens from an object side and an image side along a main optical axis; the first lens close to the object side is a convex surface, and the first lens close to the image side is a concave surface; the second lens close to the object side is a plane, and the second lens close to the image side is a convex surface; the third lens is a doublet lens formed by embedding a biconcave lens with negative focal power and a biconvex lens with positive focal power; the third lens close to the object side is a concave surface, and the third lens close to the image side is a convex surface; the fourth lens close to the object side is a convex surface, and the fourth lens close to the image side is a concave surface. Through the glass-plastic mixed material and the reasonable lens curvature layout, the optical system can still keep a stable focus position in different temperature environments, so that the thermal defocus phenomenon is reduced, and the definition of a projection picture is improved.

The invention provides a vehicle-mounted auxiliary driving large-aperture glass-plastic mixed looking-around optical system. The vehicle-mounted auxiliary driving large-aperture glass-plastic mixed looking-around optical system sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens, an optical filter, protective glass and an image plane from an object plane to an image plane along an optical axis. The 2G5P structure is adopted, the aperture is designed to F1.6, the large aperture structure design is adopted, the imaging definition in the low-illumination environment can be improved, the sentinel function of a vehicle-mounted system is met, the imaging quality requirement for normally monitoring the surrounding conditions of a vehicle in the low-illumination environment is met, meanwhile, the athermalization design is adopted, thermal temperature drift compensation is achieved, and the imaging quality of the vehicle-mounted system is improved. And the working temperature can range from-40 DEG C to 105 DEG C, so that the application of the product in complex temperature scenes is greatly improved.

The present invention provides a compact medium-wave infrared lens and a medium-wave infrared imaging system having the same. The infrared lens comprises six lenses arranged sequentially along the optical axis from the object side to the image side. The first lens is a meniscus lens with positive optical power, with its convex surface facing the object side; the second lens is a meniscus lens with negative optical power, with its convex surface facing the object side; the third lens is a meniscus lens with positive optical power, with its convex surface facing the object side; the fourth lens is a meniscus lens with positive optical power, with its convex surface facing the image side; the fifth lens is a meniscus lens with negative optical power, with its convex surface facing the image side; and the sixth lens is a biconvex lens. The present invention can solve the technical problem in the prior art that, under strict size constraints, the image quality design, athermalization design, and quenching reflection design of the lens cannot be optimized.