187 results about "Refractive lens" patented technology

According to the backlight module, the display module and the display device, the backlight module comprises a first light mixing area, a second light mixing area and at least one slope area located between the first light mixing area and the second light mixing area, and the light mixing distance in the first light mixing area is smaller than the light mixing distance in the second light mixing area. The backlight module further comprises a back plate, a light source, a lens set, a reflecting film, a diffusion plate and a middle frame. The back plate comprises a first plate body located in the first light mixing area, a second plate body located in the second light mixing area and a slope body located in the slope area. The light source comprises a plurality of first point light sources located in the first light mixing area and a plurality of second point light sources located in the second light mixing area. The lens group comprises a reflective lens positioned on the first point light source and a refractive lens positioned on the second point light source; the reflecting film is positioned on one side of the backboard close to the light source; the diffusion plate is located on one side of the lens group away from the backboard; and the middle frame is arranged around the back plate.

The utility model provides an array imaging device based on a WLO and a super lens, which comprises an array lens layer, a light transmitting layer, a diffraction layer and a light filtering layer, and is characterized in that the array lens layer is provided with a plurality of dioptric lenses arranged in an array; the array lens layer is located on the object side surface of the light transmitting layer closest to the object side of the array imaging device; the diffraction layer is located on the image side face of the light transmitting layer closest to the image side of the array imaging device, the diffraction layer is provided with a plurality of super lenses arranged in an array mode, and the super lenses and the refraction lenses are correspondingly arranged; the light filtering layer is provided with a plurality of light filters which are arranged in an array, and the light filters are arranged corresponding to the super lenses; wherein one dioptric lens, one part of the light-transmitting layer, one super lens and one optical filter form an imaging module, the imaging module can perform independent imaging, and a plurality of imaging modules are arranged in an array to form the array imaging device. According to the utility model, the problem that achromatism and small size of an imaging device in the prior art are difficult to consider at the same time is solved.

The invention discloses a polarization imaging system based on a super-structure micro-lens array and a construction method of the super-structure micro-lens array, and relates to the technical field of polarization imaging. The polarization imaging system comprises at least one refraction lens, a metasurface full Stokes polarization micro lens array and a pixel plane, and the pixel plane is formed by arranging four detector pixel arrays; the metasurface full-Stokes polarization micro-lens array is composed of a plurality of single micro-lens arrays, and a polychromatic light source focuses when incident to the refraction lens and then is transmitted to the metasurface full-Stokes polarization micro-lens array. The metasurface full Stokes polarization micro-lens array splits light in different polarization states and focuses the light to a pixel plane, and real-time polarization imaging is carried out on an object. According to the invention, the energy utilization efficiency of a single polarization is improved from 1 / 4 to 1 / 3, which has positive significance for polarization imaging and also has positive significance for function integration and volume miniaturization of an optical imaging system.

A telephoto lens assembly including a primary lens sub-assembly having at least one lens, and being operable to collect and focus light to an intermediate focal location. The assembly further includes a secondary lens sub-assembly having at least one refractive lens, and being operable to collect and focus light from the primary lens sub-assembly. The lens assembly also includes a metacorrector positioned relative to the secondary lens sub-assembly and being responsive to the focused light from the secondary lens sub-assembly, where the metacorrector includes a meta-structure that is configured to correct aberrations in the light, provide focusing / defocusing power and / or to remove residual secondary color in the light.

The invention discloses a high-integration-level far-infrared optical system and a high-integration-level far-infrared optical lens. The high-integration-level far-infrared optical system sequentially comprises a refraction lens and a combined lens from an object side to an image side along an optical axis. The refractive lens has positive focal power, and the object side surface and the image side surface of the refractive lens both protrude towards the object side. The focal power of the combined lens is positive, the combined lens comprises a lens body and a micro-nano structure array, the lens body comprises a first surface and a second surface which are located on the object side face and the image side face of the lens body respectively, the micro-nano structure array is arranged on any one of the first surface and the second surface, and the other one of the first surface and the second surface is a curved surface. According to the combined lens, broadband spectrum achromatism can be achieved, aberration of the far-infrared optical system can be corrected, due to the fact that the combined lens has the high integration level, the high-integration-level far-infrared optical system still has the excellent imaging quality while the number of lenses used by the high-integration-level far-infrared optical system is small, and the cost and the size of the system can be further reduced.

A hybrid lens and an optical system are provided, and the hybrid lens includes a first lens and a second lens in order from an object side to an image side; the first lens is a refractive lens with a positive focal length; the second lens is a metalens; both the object-side surface and the image-side surface of the first lens are aspheric surfaces; the first lens and the second lens further satisfy the conditions:t12≤0.5 mm;<semantics definitionURL="">❘<annotation encoding="Mathematica">"\[LeftBracketingBar]"< / annotation>< / semantics>f2f1<semantics definitionURL="">❘<annotation encoding="Mathematica">"\[RightBracketingBar]"< / annotation>< / semantics>≥8;R1⁢i>R1⁢O.

The invention discloses a large-aperture super-structure lens and refraction lens mixed optical system design evaluation method, which comprises the following steps: (1) carrying out ray tracing optimization design based on a phase surface of a large-aperture super-structure lens and a refraction lens to obtain a target phase equation of the phase surface of the super-structure lens; (2) establishing a metasurface unit database forming the metasurface lens, and arranging metasurface units to fit a target phase of the large-aperture metasurface lens; (3) evaluating the phase fitting degree and the imaging quality of the optical system by using a large-aperture super-structure lens full-wave simulation substitution method, and evaluating the imaging quality of the optical system by using a ray tracing method; evaluating the image quality indexes of the super-structure lens and the hybrid optical system, and if the image quality indexes meet the technical requirements, completing the design of the folding and super hybrid optical system; and if the technical requirements are not met, returning to the step (1) to carry out design optimization. By using the method provided by the invention, the imaging quality of the super-structure lens in the hybrid system can be effectively evaluated.

The application discloses a radar calibration method and device, a radar device and a radar test system. The radar calibration method is applied to the radar test system. The radar test system comprises a radar device and a radar calibration device. The radar calibration device comprises a multi-faceted refractive lens and a flying device. The multi-faceted refractive lens is arranged on the flying device. The method comprises the following steps: the radar device receives a transmission signal of the radar calibration device. The transmission signal is a reflection signal of the multi-faceted refractive lens to electromagnetic waves sent by the radar device. Based on the transmission signal, the actual reflection power of the radar calibration device to the electromagnetic waves is determined. When the error value between the actual reflection power and the standard reflection power of the electromagnetic waves of the radar calibration device is less than a preset threshold, it is determined that the calibration of the radar device is completed. The method can complete the calibration of the radar device based on the reflection signal of the multi-faceted refractive lens in the radar calibration device to the electromagnetic waves sent by the radar device, and ensures the accuracy of the calibration of the radar device.

The T8 lamp tube comprises a light-transmitting lamp tube body with a through cavity penetrating in the axial direction, and is characterized in that a lighting source is arranged at a port of one end of the through cavity, the irradiation direction of the lighting source faces a port of the other end of the through cavity, a refraction lens covers the lighting source, and a reflection mirror is arranged at a port of the other end of the through cavity; the refraction lens and the reflection mirror are oppositely arranged. The T8 LED lamp tube has the advantages that the structure is simple, and the problems that the light emitting direction of a traditional T8 LED lamp tube is concentrated, a dark space exists, and the beam angle is limited are fundamentally solved through the secondary optical design of refraction and reflection.

The wide-angle divergent lamp tube comprises a lamp shell, the lamp shell comprises a lens and a tube body, the lens and the tube body are vertically arranged and integrally formed, the section of the lens is in a semi-oval shape and comprises a diffusion lens on the periphery and a refraction lens with the transparent inner periphery, the section of the tube body is in a semi-circular shape, and the diffusion lens is arranged on the periphery of the tube body. A light source plate is arranged in the inner cavity of the lens and the tube body, three rows of lamp beads are arranged on the light source plate, and each row of lamp beads are linearly arranged and evenly distributed in the longitudinal direction of the tube body, so that electric energy can be efficiently converted, sufficient illumination can be generated, meanwhile, energy waste is reduced, and the electricity utilization cost is reduced.

The novel multifunctional high-refraction lens comprises a base layer, an annular limiting groove is formed in the periphery of the outer side of the base layer, arc-shaped limiting grooves are evenly formed in the outer side of the annular limiting groove at intervals, and a high-refraction layer set is arranged on the inner side of the base layer. The high-refraction layer group comprises a first high-refraction layer arranged on the inner side of the base layer, a second high-refraction layer arranged on the outer side of the first high-refraction layer and a third high-refraction layer arranged on the outer side of the second high-refraction layer; a hardening layer is arranged on the outer side of the third high-refraction layer, a blue-light-proof layer is arranged on the inner side of the base layer, a wear-resistant layer is arranged on the outer sides of the blue-light-proof layer and the hardening layer, and a waterproof layer is arranged on the outer side According to the utility model, the annular limiting grooves and the arc-shaped limiting grooves are arranged, so that the lenses and the spectacle frame are connected more tightly; and by arranging the high refraction layer group, the beneficial light of the lens is greatly enhanced.

The utility model discloses an optical system, an optical lens and electronic equipment, the optical system comprises a super lens and a refraction lens group, the refraction lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens from the object side to the image side, the surface, close to the object side, of the first lens protrudes towards the object side, and the surface, close to the image side, of the second lens protrudes towards the image side. The surface, close to the image side, of the first lens protrudes towards the object side, the first lens and the seventh lens are positive lenses, and the fifth lens and the eighth lens are negative lenses; the super lens is a positive lens and is arranged between any two adjacent lenses, or the super lens is arranged on the side, close to the object side, of the first lens, or the super lens is arranged on the side, close to the image side, of the eighth lens. The size of the optical system provided by the utility model is relatively small, the distortion of the optical system provided by the utility model is relatively small, and the imaging quality is excellent, so that the optical system can give consideration to both the high imaging quality and the small size.

According to the backlight module, the display module and the display device, the backlight module comprises a first light mixing area, a second light mixing area and at least one slope area located between the first light mixing area and the second light mixing area, and the light mixing distance in the first light mixing area is smaller than the light mixing distance in the second light mixing area. The backlight module further comprises a back plate, a light source, a lens set, a reflecting film, a diffusion plate and a middle frame. The back plate comprises a first plate body located in the first light mixing area, a second plate body located in the second light mixing area and a slope body located in the slope area. The light source comprises a plurality of first point light sources located in the first light mixing area and a plurality of second point light sources located in the second light mixing area. The lens group comprises a reflective lens positioned on the first point light source and a refractive lens positioned on the second point light source; the reflecting film is positioned on one side of the backboard close to the light source; the diffusion plate is located on one side of the lens group away from the backboard; and the middle frame is arranged around the back plate.

Proposed is a lighting device for a vehicle, including a light source and a cut-off refractive lens disposed in front of the light source, the lighting device for a vehicle characterized in that the cut-off refractive lens includes an entry surface and an exit surface, and realizes a set light distribution of a symmetrical or asymmetrical beam, one or more cut-off refractive lens sections are formed continuously, and one or more cut-off refractive lens sections are formed on at least one of a vertical extrusion section of an internal ray and a vertical section independent of a propagation path of the internal ray, the cut-off refractive lens sections refract, at the exit surface, internal rays transmitted through an entry surface curve so as to satisfy a set upper and lower light distribution.

The invention discloses an X-ray focusing optical system based on coupling of a single capillary tube and a refraction lens and a manufacturing method, and belongs to the technical field of X-ray focusing optical devices. Comprising an X-ray light source, a single-capillary X-ray lens and a two-dimensional diamond refraction lens, the two-dimensional diamond refraction lens is arranged between the X-ray light source and the single-capillary X-ray lens, and the focal points of the single-capillary X-ray lens and the two-dimensional diamond refraction lens coincide; the single-capillary X-ray lens is a paraboloid type single-capillary X-ray lens or an ellipsoid type single-capillary X-ray lens, and the two-dimensional diamond refraction lens is of a revolution paraboloid structure. The two-dimensional diamond refraction lens is adopted to replace a traditional light beam stopper, the design that the focus of the single-capillary X-ray lens and the focus of the two-dimensional diamond refraction lens coincide is combined, double focusing regulation and control of X-rays are achieved, and optical loss is greatly reduced.

The invention provides a combined rotating frequency doubling crystal point changing device, a point changing method and a laser. The combined rotating frequency doubling crystal point changing device comprises a refraction lens, a folded cavity mirror, a nonlinear crystal and an end mirror. The refraction lens is rotatably arranged, and fundamental frequency light enters the folding cavity mirror through the refraction lens and is reflected to the nonlinear crystal through the folding cavity mirror; the end mirror reflects fundamental frequency light entering the nonlinear crystal and frequency doubling light generated after the fundamental frequency light enters the nonlinear crystal, and the frequency doubling light is output through the output end of the nonlinear crystal. When the output point of the nonlinear crystal needs to be changed, the refraction lens is rotated by a certain angle, so that the light path of the fundamental frequency light refracted by the refraction lens is changed, and the incidence point of the fundamental frequency light and the output point of the frequency doubling light of the nonlinear crystal are further changed. The operation is greatly saved, and the implementation method is simple and rapid.

The invention provides a refraction and super hybrid lens and a design method thereof, and the refraction and super hybrid lens comprises a refraction lens, a diaphragm and a refraction and super lens which are sequentially arranged from an object plane to an image plane along an optical axis. Both the refraction lens and the refraction and super lens bear positive focal power; the object side surface of the super-refractive lens comprises a super-transparent surface, the image side surface of the super-refractive lens comprises an aspheric surface, and the image side surface of the super-refractive lens protrudes towards the image surface. The embodiment of the invention provides a folding and super hybrid lens and a design method thereof so as to realize miniaturization and low cost.

The invention relates to the field of laser cutting, and particularly discloses an automobile suspension swing arm laser cutting machine which comprises a main body block and a cutting head, a through hole for bearing a refractor barrel is formed in the main body block, the automobile suspension swing arm laser cutting machine further comprises a protection assembly, and the protection assembly comprises fixing plates hinged to each other and a fixing block arranged in the main body block. According to the invention, when a protection lens directly facing a refractor barrel is dirty and needs to be cleaned, the machine is stopped, two sealing cover plates on a main body block are removed, then a fixing plate in one mounting groove is overturned to a horizontal state and is pushed along the main body block, and the fixing plate in the main body block is pushed out for replacement; after replacement, the pushed-out fixing plate is turned over and fixed to the mounting groove, replacement is completed, the replaceable protection lens is mounted on the main body block in advance, the main body block does not need to be disassembled in the replacement process, the replacement speed is high, operation is easy, the shutdown time is short, and the production recovery speed is increased.

The utility model discloses a far-infrared optical system and a far-infrared optical lens. The far-infrared optical system sequentially comprises a refractor and a super lens from an object side to an image side along an optical axis, the refractive power of the refractive lens is positive, the object side surface of the refractive lens protrudes towards the object side, and the image side surface of the refractive lens protrudes towards the image side; the focal power of the super lens is positive, the super lens comprises a substrate and a micro-nano structure, and the micro-nano structure is arranged on the object side surface of the substrate and / or the image side surface of the substrate; wherein the far infrared optical system meets the condition that L is larger than or equal to 0.02 mm and smaller than or equal to 1 mm, and L is the distance between the image side face of the super lens and the image face of the far infrared optical system. The total optical length of the far-infrared optical system provided by the utility model is small, so that the size of the far-infrared optical system is small. The super lens has the functions of the super lens and the protective glass at the same time, so that the number of optical elements of the far infrared optical system can be reduced, the integration level of the far infrared optical system can be improved, and the size and the cost of the far infrared optical system can be reduced.

The invention belongs to the technical field of visual light equipment, and relates to a night visual function tester which comprises a shell and a controller, a dioptric lens and a display screen are arranged in the shell, two groups of holes are formed in the rear side of the shell, the display screen is arranged between the holes and the dioptric lens, and a compression motor is arranged on the inner side wall of the shell. The output end of the compression motor is connected with the refraction lens, eye movement tracking modules are arranged at the two ends of the front side of the shell correspondingly, and the compression motor, the display screen and the eye movement tracking modules are all electrically connected with the controller. Through forward and backward movement of the dioptric lens, the imaging distance can be adjusted from 0.1 m to infinity, and the night vision function testing device is suitable for night vision function testing of different myopic people; a Micro-oled display screen is adopted, so that the adjustment of the brightness of eyes from 0 to 3000nit is realized; the distance between the two dioptric lenses is adjusted through the interpupillary distance adjusting module, so that the centers of the dioptric lenses are accurately aligned with the pupil center of a testee, and the accuracy of a test result is improved.

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.

This application discloses a visible light optical system and a visible light optical lens. The visible light optical system includes a superlens, a first aspherical lens, a second aspherical lens, a third aspherical lens, and a fourth aspherical lens. The first, second, third, and fourth aspherical lenses are arranged sequentially along the optical axis from the object side to the image side. The superlens has a positive optical power. The first aspherical lens has a positive optical power, and both its object-side and image-side surfaces are convex towards the object side. The second aspherical lens has a negative optical power, and both its object-side and image-side surfaces are convex towards the image side. The third aspherical lens has a positive optical power, and both its object-side and image-side surfaces are convex towards the image side. The fourth aspherical lens has a negative optical power. The visible light optical system combines a superlens with a traditional refractive lens, giving it advantages such as low cost, small size, and excellent imaging quality.

To provide a method for evaluating an individual's visual acuity using a computerized device.SOLUTION: Provided is a method for conducting a visual acuity test on a user, the method including: displaying information to a user using a computerized device; initiating a visual acuity test including a graphical interface into which the user provides input via a touch-sensitive field; determining distance information relating to a measured distance between the device and the user from an image of the user captured by a camera of the device; displaying a predetermined visual target for the user to view; displaying the visual acuity test without a refractive lens assembly; presenting spoken indications relating to the visual acuity test via a speaker; recording an identification content spoken by the user upon viewing the predetermined visual target via a microphone; performing voice recognition for the identification content spoken by the user to generate a converted string corresponding to the spoken identification content; and determining a score for the visual acuity test performed by the user on the basis of the converted string.SELECTED DRAWING: Figure 1

Provided is a method of manufacturing a display apparatus, the method including providing a substrate on which a display element is disposed, forming a bank layer on the substrate, the bank layer including an opening overlapping the display element, forming a preliminary high refractive lens by coating the display element with a material for forming a high refractive lens and irradiating the material for forming the high refractive lens with ultraviolet rays, removing the bank layer, and forming a high refractive lens by performing a thermal treatment on the preliminary high refractive lens.

The utility model provides an under-screen optical system. The under-screen optical system is arranged between a pixelated display screen and an optical sensor. The under-screen optical system comprises at least one super lens and at least one refraction lens. The super lens comprises a substrate and at least one structural surface formed on at least one surface of the substrate; each structural surface comprises a layer of micro-nano structure, the micro-nano structure is a negative micro-nano structure or a positive micro-nano structure, and the depth-to-width ratio of the micro-nano structure is smaller than or equal to 40. According to the under-screen optical system provided by the invention, the adverse effect of high-order light generated by the screen on imaging can be reduced, and the micro-nano structure can be prevented from having too high processing difficulty while the high imaging quality is met, so that the under-screen optical system has a relatively high processing yield.

An adjustable gain antenna including an RF emitter configured to emit an RF signal along an emitter axis. A first refractive lens having an optical axis collinear with the emitter axis and a second refractive lens having an optical axis collinear with the emitter axis with the first refractive lens located between the RF emitter and the second refractive lens. A drive mechanism mechanically linked to the first refractive lens and the second refractive lens, wherein the drive mechanism is configured to move the first refractive lens and the second refractive lens longitudinally along the emitter axis to vary a gain of the RF emitter.

The embodiment of the present application provides a deep ultraviolet objective and an optical system. The deep ultraviolet objective comprises a front group lens and a rear group lens; the front group lens is arranged close to an object plane, and the front group lens has a positive refractive power; and the rear group lens has a negative refractive power. The front group lens comprises a refractive lens and at least one diffractive optical element, so as to eliminate chromatic aberration.

The utility model discloses a far-infrared optical system and a far-infrared optical lens. The far-infrared optical system sequentially comprises a super lens and a refraction lens from an object side to an image side along an optical axis. The refraction lens is a positive lens, the surface, close to the object side, of the refraction lens protrudes towards the image side, and the surface, close to the image side, of the refraction lens protrudes towards the image side; the super lens is a positive lens and comprises a substrate and a micro-nano structure, and the micro-nano structure is arranged on at least one side face of the substrate in the direction from the object side to the image side along the optical axis. Wherein the far infrared optical system meets the following condition: # imgabs0 #, V2 is the abbe number of the refraction lens, and Vm is the abbe number of the super lens. The total optical length of the far-infrared optical system is short, so that the far-infrared optical system has a relatively small size, the imaging quality of the far-infrared optical system is good, and the far-infrared optical system has the advantages of being small in size and good in imaging quality at the same time.

The application provides an optical system and an optical lens, which sequentially comprise, from an object plane of the optical system to an image plane of the optical system, a first chalcogenide refractive lens, a super lens and a second chalcogenide refractive lens; the first chalcogenide refractive lens and the second chalcogenide refractive lens are both even aspheric lenses; the first chalcogenide refractive lens is in a meniscus shape protruding towards the object plane; a first surface of the second chalcogenide refractive lens facing the object plane and a second surface of the second chalcogenide refractive lens facing the image plane both contain a concave point; the optical power of the first chalcogenide refractive lens, the optical power of the super lens and the optical power of the second chalcogenide refractive lens are all positive optical powers. The application improves the design freedom of the optical system.

The application discloses an infrared imaging optical system and a lens, and relates to the technical field of infrared imaging. The optical system is composed of a super lens and a traditional refractive lens to form a fold super hybrid optical system. The super lens has the advantages of light weight, low cost, small size and planarization, so that the optical system is miniaturized, and the weight and cost of the optical system are reduced. A double-sided super lens is introduced into the optical system, so that the flexible phase control ability of the double-sided super lens can be used to effectively correct aberration, and the imaging quality of the optical system is improved. The first lens and the second lens are both lenses with positive focal power, so that the main surface position of the optical system is more forward, the total optical length of the system is reduced, the structure is more compact, and the miniaturization of the optical system is further realized. The optical system has the characteristics of a large relative aperture, a small focal length and a wide field of view.