86results about How to "Small color difference" patented technology

The invention discloses a 35mm breathing-eliminating full-frame camera lens, and aims to solve the problems that in the prior art, when a visual angle is slightly enlarged or shrunk due to focus change, unnecessary jitter of a picture is caused, the fluency and ornamental value of a video are influenced, and the visual angle is slightly enlarged or shrunk. The lens comprises a variable diaphragm, and a first lens group, a second lens group and a third lens group which are sequentially arranged from an object side to an image side, the first lens group is composed of seven lenses and serves as a fixed group of the camera lens, and the focal power is positive; the iris diaphragm is located between the first lens group and the second lens group; the second lens group is composed of three lenses and serves as a focusing group of the camera lens, and the focal power is positive; the third lens group is composed of two lenses and serves as a fixed group of the camera lens, and the focal power is negative.

The invention provides a polycarbonate-polysiloxane copolymer as well as a preparation method and application thereof, and belongs to the technical field of polycarbonate material preparation. The polycarbonate-polyorganosiloxane copolymer comprises a polycarbonate block and a polyorganosiloxane block, and the polycarbonate-polyorganosiloxane copolymer comprises a polycarbonate block and a polyorganosiloxane block. A high-boiling-point solvent capable of simultaneously dissolving polysiloxane and polycarbonate is added, and a high-boiling-point cosolvent capable of improving intersolubility of polysiloxane and other monomers (an aromatic bisphenol compound and / or an aliphatic diol compound and diester carbonate) is introduced into a melt transesterification polycondensation method; in the ester exchange stage, the intersolubility of reaction monomers is improved, the conversion rate of polysiloxane is improved, and the transparency and molecular weight of the copolymer are improved.

The invention discloses an optical lens, a camera module and a terminal device, the optical lens comprises seven lenses, the first lens has negative refractive power, and the object side surface and the image side surface of the first lens are a convex surface and a concave surface near an optical axis respectively; the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface in paraxial regions, respectively. The third lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The fourth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region thereof. The fifth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The sixth lens element with negative refractive power has an object-side surface and an image-side surface being concave in a paraxial region. The seventh lens element with positive refractive power has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. The optical lens satisfies the following relational expressions: FOV is greater than or equal to 130 degrees and less than or equal to 160 degrees, and R6 / F3 is greater than or equal to-7.5 and less than or equal to-3.0.

The invention relates to an intelligent photovoltaic curtain wall which has the function of adjusting light transmission intensity. The surface of the photovoltaic curtain wall is fully covered by the photovoltaic module, the supporting body is installed behind the photovoltaic battery module, and the photovoltaic module is fixed on the supporting body through the module fastener. Air hole channels are arranged among the photovoltaic modules to adjust temperature, and air holes can be connected with external constant-temperature systems such as a central air conditioner, so that the photovoltaic curtain wall has good constant-temperature capability. The photovoltaic cell is located between the guide rails, and the controller controls the driving motor to achieve movement of the cell position, so that the light transmission intensity is adjusted in good time. A mechanical arm and a control motor are arranged in the photovoltaic cell storage box and used for storage and output of photovoltaic cells, and the control motor receives instructions of the controller to operate. The controller is connected with the driving motor and the control motor through data lines, the shielding area ratio of the photovoltaic cell is automatically adjusted according to user requirements, and automatic adjustment of the light transmission intensity is achieved.

The technical field of image stitching system of the present invention particularly relates to an image stitching processing system based on feature matching, including a feature detection module, a feature matching module and a stitching seam processing module; the feature detection module is used to extract features of the image to be stitched; the feature matching module is used to determine the feature matching relationship between the images to be stitched; the stitching seam processing module uses the connecting line of the overlapping areas of the two images to be stitched as the stitching seam, and then fuses the stitching seam through the image fusion module. The deep learning method of this system replaces the traditional algorithm, and an efficient network model is obtained through training to detect image features; the feature detection network inputs the image to be stitched, and extracts features through a convolutional neural network. And this system can train the network in combination with the isomorphic adaptation mechanism, so that the network can enhance the data of the feature points and descriptors output by the feature detection network through self-supervision learning.

The invention discloses an optical lens, a camera module and a terminal device, the optical lens comprises seven lenses, the first lens has negative refractive power, and the object side surface and the image side surface of the first lens are a convex surface and a concave surface near an optical axis respectively; the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface in a paraxial region, respectively. The third lens element with positive refractive power has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. The fourth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region thereof. The fifth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The sixth lens element with negative refractive power has an object-side surface and an image-side surface being concave in a paraxial region. The seventh lens element with positive refractive power has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. The optical lens satisfies the following relational expressions: 130 DEG < = FOV < = 150 DEG and 1.65 DEG < = FNO < = 1.75.

The present invention relates to the field of optical imaging technology, and discloses a microscope phase contrast objective lens, comprising a first lens group with positive refractive power, a second lens group with positive refractive power, an object plane and a cover glass, wherein the first lens group is located below the second lens group, and the absolute value of the refractive power of the first lens group is greater than the absolute value of the refractive power of the second lens group. The present invention is arranged by setting the first lens group and the second lens group in the phase contrast objective optical system, and by limiting the focal length, refractive index, Abbe number and thickness of the first lens group and the second lens group, so that the field curvature, distortion and aberration sensitivity of the phase contrast objective optical system are further improved, thereby ensuring the optical performance of the phase contrast objective optical system, so that the objective optical system has the characteristics of small magnification, large numerical aperture, high resolution performance, small chromatic aberration under a large field of view, small number of lenses, and short total length of the objective optical system.

The utility model relates to a heterogeneous bonding optical waveguide sheet, which comprises an optical waveguide layer made of wide bandgap semiconductor materials and a glass substrate made of high refractive index glass, the optical waveguide layer is arranged on the glass substrate, and a grating structure is arranged on the surface, away from the glass substrate, of the optical waveguide layer. The high-refractive-index glass optical waveguide sheet solves the problems that the refractive index of an existing high-refractive-index glass optical waveguide sheet reaches 2.0, stray light is generated through secondary coupling out and the like, and has the advantages of being high in refractive index, large in FOV, full-color in single sheet and capable of reducing rainbow lines.

The utility model relates to the technical field of backlight of display equipment, and provides a CSP backlight source and a display device. The CSP backlight comprises: a substrate comprising a light emitting circuit; the light-emitting packaging part is arranged on the substrate, electrically connected with the light-emitting circuit and comprises a blue light chip and a red-green fluorescence conversion layer which are sequentially stacked from bottom to top, and the red-green fluorescence conversion layer at least covers the blue light chip and is used for converting and mixing light emitted by the blue light chip so as to emit white light; the light-emitting packaging piece is manufactured through a chip scale package (CSP) technology; the diffusion reflection layer covers the light-emitting packaging piece in a gapless mode, the diffusion reflection layer comprises a cup-shaped diffusion part and a reflection part arranged on the periphery of the diffusion part, and the diffusion powder concentration of the central area of the diffusion part is larger than that of the edge area of the diffusion part; and the lens covers the diffusion reflection layer in a gapless manner.

The invention discloses an industrial lens and optical equipment, the industrial lens comprises a first lens group, a diaphragm and a second lens group which are coaxially arranged in sequence, the first lens group comprises a first lens, a second lens, a third lens and a fourth lens which are sequentially arranged from an object space to an image space along an optical axis, the first lens, the second lens and the fourth lens have positive focal power, and the third lens has negative focal power; the second lens group comprises a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from the object space to the image space along the optical axis, the fifth lens, the seventh lens and the eighth lens have positive focal power, and the sixth lens has negative focal power; the industrial lens satisfies the following relational expression: 4.3 < = FOV / CRA < = 5.6; 13 < = (fu1 + fu2) / IH < = 26; fOV / (D * TTL) > = 0.025; wherein FOV is the maximum field angle of the industrial lens, CRA is the main ray incident angle of the industrial lens, fu1 is the effective focal length of the first lens group in the industrial lens, fu2 is the effective focal length of the second lens group in the industrial lens, IH is the maximum image plane height of the industrial lens, D is the head aperture size of the industrial lens, and RA is the main ray incident angle of the industrial lens. TTL is the total optical length of the industrial lens. The miniature industrial lens is large in image plane, low in distortion, low in chromatic aberration and high in resolution.

The utility model discloses a roller printing device for processing tipping paper for cigarettes, which comprises a printing main body, the upper end of the printing main body is fixedly connected with a printing supporter, the inside of the printing supporter is fixedly connected with a dryer assembly, the inside of the dryer assembly is fixedly connected with a drying fan, and the drying fan is fixedly connected with a drying roller. The inner portion, close to the lower end of the drying fan, of the dryer assembly is fixedly connected with an electric heating wire structure, the inner wall of the printing supporting device is rotationally connected with a limiting structure, and the back face of the printing supporting device is fixedly connected with a printing motor. According to the technical scheme, through the arrangement of an electric heating rod, a first conveying pump and a heating water pipe, printing ink can be stirred, heating and heat preservation can be conducted at the same time, chromatic aberration generated by ink precipitation can be reduced, the effect of printing tipping paper for cigarettes is good, and the purposes of solving problems and improving the practical value are achieved through the technology.

The invention provides a method for reducing chromatic aberration through chemical galvanization, a chemical galvanization device and chemical galvanization equipment, and relates to the technical field of semiconductor manufacturing, and the method comprises the following steps: after zinc replacement of a wafer is completed in a bath solution of a chemical galvanization bath, opening a bath cover of the chemical galvanization bath, and hoisting the wafer; the partition plate extends out to separate the water injection nozzle from the tank liquid; the wafer is located between the water spraying opening and the partition plate, and ionized water sprayed by the water spraying opening is sprayed to the wafer; and after spraying is completed, the tank cover is closed, the air injection devices on the two sides of the partition plate conduct N2 blowing drying on the partition plate, and after drying is completed, the partition plate is retracted. Compared with the prior art, the device and the method for chemical galvanization replacement can further reduce chromatic aberration; a new zinc replacement tank and related equipment do not need to be purchased, and the zinc replacement tank can be put into production and use only by slightly transforming an existing tank body and adding a water and air spraying device, a partition plate and a transmission device.

Embodiments of the present application provide a projection lens and a projection device. The projection lens comprises, in order from the magnification side to the demagnification side: a first lens group with negative focal power, a second lens group with positive focal power, a diaphragm, a third lens group with negative focal power, and a fourth lens group with positive focal power. The projection lens only comprises one aspherical lens, the aspherical lens is located in the first lens group, and the materials of the lenses comprised in the projection lens are all glass materials.

The invention belongs to the technical field of projection optical lenses, and discloses a projection lens which can form a lens structure with a long back focal length through three lens groups which are respectively used for focusing, zooming and fixing, can obtain higher brightness and contrast through the lens structure with the long back focal length, and is more beneficial to heat dissipation. On the basis, continuous zooming can be achieved through the first zoom lens set, the second zoom lens set and the third zoom lens set which independently move along the optical axis, and meanwhile under the condition that the back focal length is long or the length of the lens is fixed, through the design in the aspects of back focal length control, lens materials and / or lens gluing and the like, continuous zooming can be achieved. The problems of chromatic aberration and difficult light correction caused by a long back focal length lens structure can be solved in the aspects of aberration, chromatic aberration and the like, the contrast ratio and the brightness are better improved, and the purposes of long back focal length, high brightness, low chromatic aberration, low distortion, large aperture and high imaging quality of the projection lens are finally achieved.

The invention relates to a high-hardness galvanized plate and a preparation method thereof, and belongs to the technical field of galvanized plates. The nano coating of the high-hardness galvanized sheet with the nano coating comprises the following components: silicon dioxide, zinc oxide, aluminum triphosphate, 1-methyl hydantoin-2-imide, tert-butyl sulfonamide, polystyrene-acrylic acid allyl ester, epoxy resin, polyurethane resin and the like. All the components are matched for use according to a specific proportion, so that the coating has good coating homogeneity, good adhesive force and outstanding corrosion resistance and aging resistance, and the service life of the nano-coating galvanized sheet can be effectively prolonged; the designed steel plate components have high hardness and good use performance, and the service life can be well prolonged when the steel plate components are matched with a plating layer and a coating.

The embodiment of the invention provides an optical module and head-mounted display equipment. The optical module sequentially comprises a first lens group and a second lens group along the light transmission direction, the focal power of the first lens group is positive, and the focal power of the second lens group is positive; the first lens group comprises at least two negative lenses, and at least one positive lens is arranged between the two negative lenses; wherein the sum of the focal power of the negative lenses / the sum of the intervals between the negative lenses is smaller than or equal to 0.01, and the interval between the negative lenses is the interval between every two adjacent negative lenses; the second lens group includes at least one positive lens.

The invention provides a method for preparing a diglycosyl crosslinking agent and a method for preparing anti-wrinkle fabrics using the diglycosyl crosslinking agent, and belongs to the technical field of fabric finishing. The invention adopts a diglycosyl crosslinking agent to mix with a weak polar organic solvent, and then reacts with a periodate aqueous solution under light-proof conditions, and freezes and treats the periodate under low temperature conditions to recover the periodate, so as to obtain a diglycosyl crosslinking agent mother liquor, and freeze-drying to obtain a diglycosyl crosslinking agent powder. The method improves the yield of the diglycosyl crosslinking agent and the recovery rate of the oxidant, and the preparation time of the crosslinking agent is short, thereby improving the preparation efficiency. The invention adopts a binary solvent system in which the solvent is a strong polar solvent water and a weak polar organic solvent, and the prepared diglycosyl crosslinking agent is not easy to form hemiacetal or acetal. The diglycosyl crosslinking agent prepared by the invention is used to treat the fabric, and a non-ironing fabric with high strength, low color difference, formaldehyde-free, and machine washable can be obtained.

This invention provides a radiation-resistant fluorophosphate glass and its preparation method, relating to the field of glass preparation technology. The fluorophosphate glass, by weight, comprises the following raw materials: Ba(PO3)2 30-48 parts, Sr(PO3)2 6-12 parts, Al(PO3)3 10-16 parts, AlF3 4-8 parts, MgF2 4-8 parts, BaF2 4-10 parts, SrF2 6-10 parts, LiF1-4 parts, and Ce-Gd@LaF3 nanocomposite 0.5-2.0 parts. The Ce-Gd@LaF3 nanocomposite is prepared by the following method: a Ce-Gd co-doped nanocomposite is synthesized using Ce(NO3)3·6H2O and Gd(NO3)3·6H2O, and then LaF3 is coated onto the surface of the Ce-Gd co-doped nanocomposite to obtain the Ce-Gd@LaF3 nanocomposite. A method for preparing a radiation-resistant fluorophosphate glass includes Ce-Gd co-doped nanocomposite synthesis, LaF3 coating, and melting of the co-doped fluorophosphate glass. This invention provides a radiation-resistant fluorophosphate glass with excellent radiation resistance, mechanical properties, and optical properties.

The application discloses a printing method, a printer, a device and a storage medium. Material information of a to-be-printed image and current printing medium is acquired first. Then, a color characteristic curve and a color management curve are determined according to the material information. Next, the to-be-printed image is color-corrected according to the material information, the color characteristic curve and the color management curve, so as to obtain a target printing image. Subsequently, a printing operation is performed on the current printing medium according to the target printing image. According to the application, the corresponding color characteristic curve and color management curve are determined according to the material information of the printing medium, so that individual color management for different material printing media can be realized, thereby effectively reducing the color difference between different material areas and greatly improving the consistency and accuracy of colors.

The invention relates to the technical field of meat pressing plate equipment, in particular to a chilled meat pressing plate forming machine and a forming method thereof.The chilled meat pressing plate forming machine comprises a workbench and a portal frame installed on the workbench, a hydraulic rod is installed in the center of the top of the portal frame, and guide rods are oppositely installed on the portal frame through a fixing frame; the guide rods are located on the two sides of the hydraulic rod respectively, a butt joint base is fixed to the end, away from the top end of the portal frame, of the hydraulic rod, the two sides of the butt joint base are slidably connected with the guide rods respectively, and under the action of the elastic cover on the pressing plate and the steel balls in the elastic cover, pressure transmitted to all parts of chilled fresh meat by the elastic cover is larger than that of a traditional flat plate. The chilled fresh meat subjected to plate pressing is small in color difference and high in quality; the plastic film is arranged on the placing table in advance under the guide of the winding mechanism, workers can directly place chilled fresh meat on the plastic film, the workers do not need to wrap the chilled fresh meat one by one, time and labor are saved, and the time of direct contact between the workers and the chilled fresh meat is greatly shortened.

The invention relates to an observing and aiming lens which is arranged along an optical axis in a direction from an object side to an image side. The lens sequentially comprises a first lens with positive focal power, a second lens with positive focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, a seventh lens with positive focal power, an eighth lens with negative focal power and a ninth lens with positive focal power. The effective focal length F6 of the sixth lens and the effective focal length F of the observing and aiming lens meet the following relation: 0.2 < = F6 / F < = 2.0; the effective focal length F7 of the seventh lens and the effective focal length F of the observing and aiming lens meet the following relation: 0.09 < = F7 / F < = 0.30. The observing and aiming lens at least has the advantages of ultra-long focal length, miniaturization, wide spectrum (430-940 nm), high resolution, low chromatic aberration, good thermal stability (-30-70 DEG C), full-field illumination greater than or equal to 99%, and incident angle CRAlt of main light of the lens; 1.0 degree and the like.

This application discloses a lens module and an electronic device, relating to the field of electronic products. The disclosed lens module includes: a first lens group and a second lens group; the first lens group and the second lens group are arranged along the optical axis of the lens module, and both the first lens group and the second lens group have positive optical power to form a Keplerian afocal optical module; at least one lens in the first lens group is a low-dispersion lens with an Abbe number greater than X, where X is greater than or equal to 70. This application can solve the problems of large chromatic aberration and low resolution in current external telephoto lens modules.

The present invention belongs to the technical field of waterborne coatings, and specifically relates to a waterborne coating composition and a preparation method thereof. The composition comprises a waterborne acrylic polyurethane topcoat and a waterborne epoxy primer; the waterborne acrylic polyurethane topcoat comprises: component A and component B; the waterborne epoxy primer comprises component A and component B; component A comprises: waterborne hydroxy acrylic dispersion, color paste, silicon dioxide, solvent A, pH regulator, wetting agent A, defoamer A, polytetrafluoroethylene wax, thickener A, anti-settling agent A, and water; component B comprises: hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate, propylene glycol methyl ether acetate, and dehydrating agent; component A comprises: waterborne epoxy emulsion, carbon black, titanium dioxide, dispersant, solvent B, wetting agent B, defoamer B, thickener B, anti-settling agent B, and water; component B comprises: modified aliphatic amine curing agent and water. The composition has excellent adhesion, hardness, and weather resistance.

The invention provides a wide-angle optical lens which can solve the problems that an existing wide-angle optical lens is small in target surface and difficult to have a large view field and low distortion at the same time. The lens comprises a first meniscus positive lens, a first meniscus negative lens, a second meniscus negative lens, a plano-concave lens, a third meniscus negative lens, a first biconvex positive lens, a second meniscus positive lens, a biconcave negative lens and a second biconvex positive lens which are sequentially arranged from an object plane to an image plane along the propagation direction of incident light, the focal length of the first positive meniscus lens is f1, the focal length of the first negative meniscus lens is f2, the focal length of the second negative meniscus lens is f3, the focal length of the plano-concave lens is f4, the focal length of the third negative meniscus lens is f5, the focal length of the first biconvex positive lens is f6, the focal length of the second positive meniscus lens is f7, and the focal length of the biconcave negative lens is f8. The focal length f9 of the second biconvex positive lens and the focal length f of the integral structure formed by the nine lenses meet the following relations: 2.60 lt; f1 / flt; 3.60,-1.20 [mu] m; f2 / flt; 1.00 [mu] m, 1.00 [mu] m; f3 / flt; -0.80,-1.80 [mu] m,-0.80 [mu] F4 / flt; 2.50,-0.4 lt, 2.50,-0.4 lt; f5 / flt; 0.2, 0.2 lt, 0.2 lt; f6 / flt; 0, 0.4, 0.70 lt; f7 / flt; 0.90,-0.90 < lt >,-0.90 < lt >; f8 / flt; 0.60, 1.00 lt, 0.60, 1.00 lt; f9 / flt; 1.20, 1.20.

This application relates to a multi-axis reciprocating spraying equipment, which includes a machine body and a gantry module structure. The gantry module structure is connected to a spray gun, and the spray gun is driven to reciprocate along the X, Y, and Z axes by the gantry module structure. A revolution drive assembly is arranged below the machine body and the gantry module structure, and a conversion plate is connected to the revolution drive assembly. The conversion plate is parallel to the Y-axis direction, and fixtures are provided at both ends of the conversion plate for fixing workpieces. The revolution drive assembly drives the conversion plate to rotate, thereby changing the positions of the two ends of the conversion plate. This application realizes parallel operation of workpiece spraying and loading / unloading, resulting in high production efficiency.

The invention relates to the related technical field of paint spraying equipment, and discloses movable paint spraying equipment based on a regulation and control assembly, which comprises a movable platform, a box body is fixedly arranged on the upper side of the movable platform, a cover plate is arranged on the upper side of the box body, the regulation and control assembly is arranged on the upper side of the cover plate, a spray head is arranged on the regulation and control assembly, and a fixed plate is fixedly arranged on the lower side in the box body. A cylinder is arranged on the upper side of the fixing plate, a mixing cavity is formed in the upper side in the cylinder, and a stirring assembly is arranged in the mixing cavity; a second arc-shaped scraping plate and a first arc-shaped scraping plate alternately make contact with the inner wall of the mixing cavity so that paint adhering to the inner wall of the mixing cavity can be fully removed, the situation that the paint stirring uniformity is affected is avoided, and the situation that a cylinder is corroded and damaged due to the fact that the paint adheres to the inner wall of the mixing cavity for a long time is prevented; and the two first arc-shaped scraping plates and the two second arc-shaped scraping plates alternately move back and forth, so that the paint in the mixing cavity can be stirred, and blending of the paint color is promoted.

Techniques for operating an optical system are disclosed. World light may be linearly polarized along a first axis. When the optical system is operating according to a first state, polarization of the world light may be rotated 90 degrees, the world light may be linearly polarized along a second axis perpendicular to the first axis, and zero net refractive power may be applied to the world light. When the optical system is operating according to a second state, virtual image light may be projected onto an eyepiece of the optical system, the world light and the virtual image light may be linearly polarized along the second axis, the polarization of the virtual image light may be rotated 90 degrees, and a non-zero net refractive power may be applied to the virtual image light.

The invention discloses a preparation method of a floating-point four-way stretch fabric containing ecological wool and bio-based nylon blended yarns. The preparation method comprises the following steps: yarn selection and matching: warp yarns: bio-based nylon coated spandex yarns; the weft yarns A are bio-based nylon coated spandex yarns; the weft yarns B are bio-based nylon dot net composite filaments; weft yarns C are blended yarns of wool and bio-based nylon; weaving: weaving according to design requirements by adopting selected yarns to obtain a floating-point four-way stretch fabric; and dyeing and finishing: sequentially carrying out open-width cold batch, pre-setting, dyeing and final setting on the obtained floating-point four-way stretch fabric to obtain the floating-point four-way stretch fabric. The bio-based nylon is added into the fabric, so that the rebound resilience is enhanced, and the floating-point four-way elastic structure endows the fabric with good elasticity and extensibility in all directions, so that the fabric can quickly restore to the original shape after being stretched, and good appearance and shape are kept.

The invention provides a vehicle-mounted ADAS lens and a vehicle, and is based on the technical field of vehicle-mounted lenses, the vehicle-mounted ADAS lens is provided with an object side and an image side which are oppositely arranged along the direction of an optical axis, and the vehicle-mounted ADAS lens comprises a first lens group with positive focal power, a second lens group with positive focal power, a third lens group with positive focal power, a fourth lens group with positive focal power, a fifth lens group with positive focal power and a sixth lens group with negative focal power, which are sequentially arranged from the object side to the image side, all lenses in the first lens group and the second lens group are glass spherical lenses, the focal length of the first lens group is f11, the focal length of the second lens group is f22, the focal length of the vehicle-mounted ADAS lens is f, f11 / f is larger than 1.5 and smaller than 2.5, f22 / f is larger than 3 and smaller than 6.5, so that the field angle of the vehicle-mounted ADAS lens reaches 130 degrees or above, the F value of the number of apertures reaches 1.8, and the F value of the number of apertures reaches 1.8. And the resolution reaches three million pixels. According to the technical scheme provided by the invention, the focal power of each lens group and the material of the lens are reasonably set, so that the vehicle-mounted ADAS lens which is large in viewing angle, large in aperture, high in image quality and capable of clearly imaging in a weak light environment is realized.

The application discloses a micro projection lens and a projection system, which comprise a first lens group, a second lens group and a third lens group from an object side to an image side in sequence; the first lens group comprises at least one aspherical lens, the second lens group comprises at least one aspherical lens, and the third lens group comprises at least one aspherical lens and a group of cemented lenses; the first lens group is used for reducing distortion aberration; the second lens group is used for reducing spherical aberration and reducing the projection size; and the third lens group is used for reducing chromatic aberration. The embodiment of the application can reduce the size and weight of the projection lens, improve the projection quality, and can be widely applied to the field of optical technology.