271 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 discloses a long-focus compact high-resolution athermalization type visible light imaging system, and relates to the technical field of optical system design, and the system comprises an optical window, and a reflector group, a first fixed group, a relay lens group and an aberration correction group which are arranged on the same optical axis in sequence from front to back in the light beam incidence direction; the reflector group comprises a secondary reflector and a primary reflector which are arranged in sequence; the first fixed group comprises a first lens and a second lens which are arranged in sequence, and a first image surface is formed between the front of the first fixed group and the secondary reflector; the relay lens group comprises a third lens, a fourth lens and a fifth lens which are arranged in sequence, and the third lens is arranged on the side, away from the first lens, of the second lens; the aberration correction group comprises a sixth lens and a seventh lens which are sequentially arranged, and the sixth lens is arranged on the side, away from the fourth lens, of the fifth lens. According to the system, system aberration can be eliminated and thermal defocus can be compensated through cooperation of the lens groups, so that a passive athermalization effect is achieved.

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 invention relates to the technical field of infrared optical systems, and particularly discloses a small-F-number refrigeration type athermalization medium-wave infrared optical system which comprises seven coaxial lenses, the seven lenses are divided into a front group and a rear group from the object space to the image space, and the front group is composed of a first front group lens, a second front group lens and a third front group lens; the rear group consists of a rear group lens I, a rear group lens II, a rear group lens III and a rear group lens IV; a secondary imaging structural form is adopted, 100% cold diaphragm efficiency is met, stray light can be effectively eliminated in cooperation with a corresponding optical machine structural design, the system automatically adjusts the position of the lens through real-time monitoring of the temperature sensor and an intelligent temperature compensation algorithm, it is ensured that the optical system always keeps high-precision imaging within the temperature fluctuation range, and the optical system is high in imaging precision. Image surface drift is avoided, the focal length change is accurately calculated and compensated, so that the optical system can adapt to wide temperature fluctuation, and the imaging quality is ensured not to be influenced.

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 an infrared manual adjustable athermalization prime lens and a using method thereof.The infrared manual adjustable athermalization prime lens comprises a lens main body, a lens barrel is arranged in the lens main body, a gap is reserved between the lens main body and the lens barrel, a C-shaped ring used for limiting is arranged in the gap, a focusing hand wheel is arranged on the outer side of the lens main body, and the focusing hand wheel is arranged on the outer side of the lens main body. And the focusing hand wheel rotates to drive the lens barrel to move relative to the lens main body, so that the adjustment of the rear intercept is realized. According to the structure, the mode that the focusing hand wheel rotates in a threaded mode to drive the lens cone to move transversely is adopted, the structure is more reliable, the rotating hand feeling is smooth, the waterproof grade is high, the internal focusing mode is adopted, the relative movement of the lens cone is only in the lens, the overall appearance size of the lens is not changed, the requirement for the size of a client shell is low, and the appearance feeling is better. The hand wheel is limited by the clamp spring and the C-shaped ring, so that the device is small in size and suitable for a miniaturized uncooled infrared optical system; and the device is compact in structure, low in manufacturing cost and suitable for large-scale production.

The invention discloses a visible light / infrared dual-mode seeker optical imaging system which comprises a visible light imaging system and an infrared imaging system, the visible light imaging system comprises a first lens to a fifth lens in the direction from an object side to an image side, and the infrared imaging system comprises a sixth lens to an eighth lens in the direction from the object side to the image side. The dual-mode seeker optical imaging system provided by the invention has the following advantages: (1) clear imaging can be realized in visible light and near-infrared spectrum bands, and all-day imaging in the daytime and at night is realized; (2) one set of lens can be used for imaging in two spectral bands, and the size and the weight of an imaging system are greatly reduced; (3) the spatial resolution is high, and the imaging detection requirement of the seeker on a long-distance target can be met; (4) the athermalization effect is good, an infrared imaging system and a visible light imaging system do not have virtual focus in the range of-40 DEG C to 60 DEG C, and the imaging quality is excellent; and (5) the applicable spectral line range of the visible light imaging system is 0.4-1.1 [mu] m, that is, the imaging wave band can be extended to the near-infrared wave band.

The invention provides a large-view-field infrared lens. The large-view-field infrared lens comprises a lens body, two front fixing sets arranged above the lens body, a fast reflecting mirror set arranged in the lens body and a relay set arranged on the right side of the lens body. The relay group is horizontally arranged, the included angle between the fast reflecting mirror group and the horizontal direction is 45 degrees, the two front fixing groups are inclined by 20 degrees relative to the vertical direction, and the included angle between the two front fixing groups is 40 degrees; according to the large-view-field infrared lens, a 1280 * 1024-at10 [mu] m medium-wave refrigeration type detector is used, the view field angle is larger than or equal to 84.5 degrees * 54.2 degrees, and the imaging performance is good; the F number of the optical system is 2.0, the light flux of the system is increased, and the sensitivity is improved; distortion is less than or equal to 1.0%; the lens is small in size and compact in structure, and the adjustment precision of the lens is improved; the optical athermalization design is adopted to eliminate thermal difference and chromatic aberration, and athermalization is achieved within the temperature range from-40 DEG C to 70 DEG C.

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.

The invention discloses a broadband large-relative-aperture low-distortion ultraviolet focusing optical system and a lens, and belongs to the technical field of optical imaging. The system comprises a concave-convex lens (1), a first biconcave lens (2), a first biconvex lens (3), a second biconvex lens (4), a second biconcave lens (5), a third biconvex lens (6), a plano-concave lens (7), an optical filter (8) and a focal plane (9) which are arranged in sequence, the optical centers of the lenses are positioned on the same straight line; light sequentially passes through the concave-convex lens (1), the first biconcave lens (2), the first biconvex lens (3), the second biconvex lens (4), the second biconcave lens (5), the third biconvex lens (6) and the plano-concave lens (7) and then passes through the optical filter (8) to reach the focal plane (9). The broadband ultraviolet imaging optical system has an ultraviolet imaging function under a broadband, and can solve the problems that an existing ultraviolet imaging optical system is narrow in working waveband, or large in imaging distortion, or small in relative aperture, or does not realize athermalization.

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 provides a 35mm line scanning lens and an optical system. The 35mm line scanning lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a diaphragm, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens and an eleventh lens which are sequentially arranged from an object side to an image side along an optical axis, the object side surface is a convex surface, and the image side surface is a concave surface; under the condition of considering a large target surface, reasonable lens matching is adopted, so that the imaging quality requirement is met, and the manufacturing cost is reduced; the wide-working-distance imaging requirement is met, and the minimum working distance of imaging can be taken into account to be 130 mm; the high resolution in a full target surface range is realized, and the imaging quality from the center to the edge is relatively consistent; and an optical athermalization design is adopted, so that high-definition images can be output in high and low temperature environments (-40 DEG C to 80 DEG C).

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.