201 results about "Athermalization" patented technology

Embodiments of this disclosure provides systems and methods for displays. In embodiments, a display system includes a frame, an eyepiece coupled to the frame, and a first adhesive bond disposed between the frame and the eyepiece. The eyepiece can include a light input region and a light output region. The first adhesive bond can be disposed along a first portion of a perimeter of the eyepiece, where the first portion of the perimeter of the eyepiece borders the light input region such that the first adhesive bond is configured to maintain a position of the light input region relative to the frame.

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 discloses an infrared athermalization super-resolution imaging system and method based on wavefront coding, the system is composed of an imaging main lens group 1, a phase plate 2 and a camera 4, the phase plate 2 is rotated, low-resolution infrared images modulated by phase coding are recorded in the camera 4 in sequence, and a frequency spectrum constraint airspace is adopted to update an iterative algorithm until convergence is achieved. And therefore, the limitation of insufficient Nyquist sampling can be broken through, and the imaging quality of the phase-coded intermediate image can be effectively improved. A phase plate 2 is added on an aperture plane 3 of an infrared imaging system to perform coding regulation and control on an image, so that an infrared focal plane can output a highly consistent intermediate coding image within a certain environment temperature range, and the phase plate is rotated to acquire wavefront coding image information at different angles to realize super-resolution reconstruction of the image, so that the imaging precision is improved. And finally, athermalization super-resolution imaging between-20 DEG C and + 60 DEG C can be realized, and the imaging resolution can be improved by two times.

The invention discloses an athermalization intensive type multi-reflector cavity based on an off-axis mirror and a light spot control method, the multi-reflector cavity comprises a main reflector and a secondary reflector, a first off-axis reflector is nested in a local area of the main reflector, a second off-axis reflector is nested in a local area of the secondary reflector, and the first off-axis reflector and the second off-axis reflector are arranged in parallel. An incident hole or an emergent hole is formed in the primary reflector or the secondary reflector; a light beam enters from the incidence hole and is reflected back and forth between the primary reflector and the secondary reflector so as to form a plurality of light spots on the primary reflector and the secondary reflector, same-stage concentric rings are formed among the light spots, and the second off-axis reflector can reflect the light beam in the first-stage concentric ring to the second-stage concentric ring. The first off-axis reflector receives the light beam reflected by the second off-axis reflector and reflects the light beam to the second-stage concentric ring of the secondary reflector, and the light beam forms a multi-stage concentric ring after being reflected for multiple times and is emitted from the emitting hole. According to the invention, the utilization rate of the mirror surface can be improved, and the positions and number of light spots can be accurately controlled.

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 long-wave infrared athermalization wide-angle temperature measurement lens comprises a first lens, a second lens, a third lens, a diaphragm STOP, a fourth lens and an optical filter which are sequentially connected along an optical axis from an object side to an image side in an optical path mode. The object-side surface of the first lens is a convex surface, and the image-side surface is a concave surface. The object side surface of the second lens is a convex surface, and the image side surface is a concave surface; the object side surface of the third lens is a concave surface, and the image side surface is a convex surface; the fourth lens element has a convex object-side surface and a convex image-side surface. By adopting the optimized first to fourth lenses, the number of used lenses is reduced, the cost is reduced, the horizontal visual angle is ensured to reach 90 degrees, and the number of apertures is less than or equal to 1.0. In addition, the total optical length is smaller than or equal to 50 mm, the structure is designed to be light, and the purpose of miniaturization is achieved. Meanwhile, the advantages of optical athermalization and active and passive focusing compensation of an electric tuning system are utilized, and high imaging quality is obtained under the complex environment temperature.

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 photoelectric autocollimator comprises a beam splitter prism, a collimating objective lens located on one side, facing an object to be measured, of the beam splitter prism, a collimating ocular lens located on one side, back to the object to be measured, of the beam splitter prism, and a filter lens located on one side, facing an image plane of a detector, of the beam splitter prism, a reflector is arranged on one side, back to the beam splitter prism, of the collimator objective, the collimator objective is a transmission-type double-telecentric optical mechanism, and an aperture diaphragm is arranged in the middle of the collimator objective; a light source is arranged on one side, back to the spectroscope, of the collimating eyepiece, and the collimating eyepiece is a Cranisiden eyepiece; the centers of the collimator objective, the beam splitter prism and the collimator eyepiece are located on the same optical axis. Through transmission-type double-telecentric scheme design and athermal design calculation, different types of glass materials and structural materials are selected to be matched, and the temperature influence is eliminated through reasonable combination of the glass materials and the structural materials, so that the optical system is not influenced by the environment temperature, and the athermal effect is 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.

A chalcogenide material-based low-cost long-wave refrigeration athermalization optical system belongs to the technical field of optical imaging, and is sequentially and coaxially provided with a fairing, a first lens, a second lens, a third lens, detector protection glass, a cold diaphragm and an image plane from outside to inside in a light propagation direction. The optical system is used for receiving inherent infrared radiation passing through a target and a background and converging the infrared radiation to the photosensitive surface of the long-wave infrared refrigeration detector, optical signals are converted into electric signals through photoelectric conversion, and the system has high sensitivity and small spatial resolution and can be used for detecting the target and the background. Detection, identification and accurate positioning of a target can be realized at night or under a complex meteorological condition. The system has the prominent advantages of excellent imaging quality in a working temperature range of-40 DEG C to + 70 DEG C, strong light collecting capability, good environmental adaptability, strong anti-interference capability, capability of working all day long and the like, and can be widely applied to the fields of spaceflight optical remote sensing, optical imaging guidance, astronomical observation, civil safety monitoring and the like.

The invention provides an ultra-wide-angle automobile application look-around optical imaging lens. The optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, an optical filter, protective glass and an image plane from an object plane to an image plane along an optical axis. The ultra-wide angle design is adopted, the lens angle reaches 207 degrees, the driving view field is greatly widened, the athermalization design is adopted, thermal temperature drift compensation is achieved, the working temperature can range from-40 DEG C to 105 DEG C, and the application of the product in high-temperature, low-temperature and other complex temperature scenes is improved; the EP8000 / T62R / F3500 plastic material with a high Tg value is selected when the material of the lens is selected, so that the high and low temperature working reliability of the lens is ensured; the high-temperature MTF attenuation sensitive lens is designed to be away from the inner wall of the lens cone, so that MTF attenuation caused by surface variation due to extrusion of the high-temperature plastic lens and the lens cone is avoided, and the definition of the lens in a complex high-temperature environment is ensured; the purple edge is optimized through matching of the spherical surface and the aspheric surface, and the image quality of lens imaging is improved.

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.

A miniaturized three-reflection refrigeration type infrared optical system based on an LEO detector is characterized in that an image plane of a thermal imager is rotated by 90 degrees through a three-time reflection mode, so that the LEO type refrigeration infrared detector is rotated by 90 degrees to be installed, the problem that the transverse size is too large due to the structure of the detector is solved, and the miniaturized design of the whole thermal imager is realized. Based on the scheme, the optical system can reach 100% cold diaphragm efficiency, the system adopts a secondary imaging structure to reduce the aperture of the system, the optical path is reflected through the reflector to adapt to the installation requirement in a special space, and the diffractive optical element and the aspheric surface are used for athermalization and achromatism.

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 a double-color composite uncooled athermalization infrared lens, the applicable spectral ranges are 3-5 [mu] m and 8-12 [mu] m, and the lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged in the optical axis transmission direction; the first lens and the fourth lens are meniscus positive lenses with convex surfaces facing the object side; the second lens, the third lens and the fifth lens are meniscus negative lenses with convex surfaces facing the object side; the air gap between the first lens and the second lens is 0.5 mm, the air gap between the second lens and the third lens is 18.2 mm, the air gap between the third lens and the fourth lens is 31.89 mm, and the air gap between the fourth lens and the fifth lens is 0.5 mm. The lens provided by the invention is simple in structure, large in target surface and clear in imaging, is adaptive to a double-color movement, and can be matched with an uncooled detector with the resolution of 1280 * 1024 and 12 [mu] m for use. The invention further discloses an imaging device.

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.