411results about How to "Large aperture" patented technology

The present invention relates to a catalyst for ortho-parahydrogen conversion suitable for a wide range of low-temperature conditions and a preparation method thereof. The catalyst is a fiber magnetic catalyst FeMnOx doped with Fe atoms in an orderly manner; the base material of the catalyst is α-MnO2, the α-MnO2 belongs to the tetragonal system, the unit cell parameter is #imgabs0#, the crystal structure is composed of 2×2 octahedral chains with shared edges, the XRD characteristic diffraction peaks are 2θ=12.8°, 18.1°, 25.7°, 37.5°, 49.8°, 56.3°, and the specific surface area measured by the BET test method is 100-150m 2 / g, and transmission electron microscopy shows that its microstructure is a fibrous structure with a diameter of 2 to 5nm and a length of 100nm to 500nm; when the catalyst is used for the ortho-parahydrogen conversion reaction, the ortho-parahydrogen conversion efficiency is more than 95%, and the catalyst life is more than 1400h; the wide range of low temperature conditions is 23K-77K. The coordination of Fe atoms with lattice oxygen in α-MnO2 can effectively avoid the deactivation of the catalyst caused by the change of the valence state of the metal component, thereby enhancing the stability and life of the catalyst, and is suitable for industrial-scale production.

The invention relates to a preparation method and application of an organosilicon / MOF-303 mixed matrix membrane, a silicon source precursor is uniformly dissolved in an ethanol solvent, then a mixture of water and hydrochloric acid is added according to a certain proportion, a water bath heating reaction is carried out for a period of time to obtain an organosilicon sol, prepared MOF-303 powder is added into the organosilicon sol according to a certain proportion, and the organosilicon / MOF-303 mixed matrix membrane is obtained. The preparation method comprises the following steps: uniformly mixing the raw materials through ultrasound to obtain a separation layer sol, coating the prepared separation layer sol on a ceramic support body through a hot coating method, and calcining in an air atmosphere for a period of time to obtain the MOF-303 / mixed matrix membrane. An organic silicon substance BTESA with a rigid acetylene bridge structure is preferably selected as a precursor, an MOF-303 material with a high specific surface area is doped into the precursor, the pore channel structure of the membrane is modified, more adsorption sites are provided for water molecules, and the composite membrane material with the optimal separation performance is obtained by optimizing the composite proportion.

The invention provides an optical lens, which comprises four lenses from the object side to the imaging surface along the optical axis: a first lens with negative focal power, the object side surface of which is a concave surface near the optical axis, and the image side surface of which is a concave surface; the image side surface of the second lens is a convex surface; the third lens has positive focal power, the object side surface of the third lens is a concave surface near the optical axis, and the image side surface of the third lens is a convex surface; the fourth lens has focal power, the object side surface of the fourth lens is a convex surface near the optical axis, and the image side surface of the fourth lens is a concave surface near the optical axis; wherein the maximum field angle FOV of the optical lens and the aperture value Fno meet the following conditions: 130 degree lt; an FOV / Fnot; 150 DEG C; the curvature radius R5 of the object side surface of the third lens and the curvature radius R6 of the image side surface of the third lens satisfy 0.1 lt; (R5-R6) / (R5 + R6) lt; and 0.8. According to the optical lens provided by the invention, the four lenses with specific focal power and specific surface type are adopted, so that the lens has one or more advantages of large aperture, large field of view, small distortion, miniaturization, high pixel and the like.

The utility model relates to a low total length 8M foresight optical lens, which is characterized in that an optical system of the lens is composed of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path. The lenses are made of plastic and glass materials, the first lens, the second lens, the fourth lens, the fifth lens and the sixth lens are glass spherical lenses, the third lens and the seventh lens are plastic aspheric lenses, and the fifth lens and the sixth lens form a balsaming lens group. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the distance between the lenses on the optical axis and the like, the total length of the lens and the radial size of each lens are reduced while the requirements of a front-view wide-angle camera and a front-view narrow-angle camera are replaced by the low-total-length 8M ultra-wide-angle imaging performance of the lens; and the lens group is miniaturized.

The invention relates to a breathable device applied to a shoe sole and a preparation method thereof, the shoe sole and a shoe, the breathable device comprises a gasket and waterproof breathable cloth covering the surface of the gasket, a plurality of protrusions are arranged on the surface of the gasket, a plurality of breathable holes are formed in the protrusions, and a plurality of round holes are formed in the periphery of the waterproof breathable cloth. A gasket is arranged on the peripheral edge of the waterproof breathable cloth in an overlapped mode and integrally formed with the gasket through the penetrating round holes. A mold A is adopted for manufacturing a semi-finished inner ring part, then the inner ring part is put into a lower mold of a mold B, TPU materials are injected into the mold B, the TPU materials flow into a groove of the inner ring part and the peripheral edge of a mold cavity of the lower mold of the mold B, and meanwhile the TPU materials penetrate through round holes of waterproof breathable cloth to flow into an annular groove of an upper mold of the mold B; the inner ring part, the waterproof breathable cloth and the secondarily injected TPU material cloth are bonded and integrally formed, the TPU material vertically clamps the peripheral edge of the waterproof breathable cloth, the waterproof breathable cloth and the inner ring part are firmly connected, and the peripheral edge is not prone to delaminating.

The utility model relates to a foresight ultra-wide-angle binocular camera. An optical system of the camera is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from left to right along a light incident light path. Under the condition that retroflexion caused by aspheric coefficients is not considered, the first lens is a meniscus concave negative lens, the second lens is a meniscus concave positive lens, the third lens is a meniscus convex positive lens, the fourth lens is a biconvex positive lens, the fifth lens is a meniscus concave negative lens, the sixth lens is a meniscus convex positive lens, and all the lenses are made of glass materials. Wherein the first lens and the sixth lens are glass aspheric lenses, and the fourth lens and the fifth lens form a balsaming lens group. While the wide-angle 120-degree clear imaging is realized, the wide-angle 120-degree wide-angle imaging lens has a relatively small appearance size and relatively high environmental stability.

The utility model relates to an ultra-wide-angle lens suitable for a front binocular camera module. An optical system is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along the incident direction of light, and the fourth lens and the fifth lens are glued to form a glued lens group. The imaging angle of the camera lens to an object is larger than 120 degrees, meanwhile, the camera lens has the advantages of being high in imaging definition, large in clear aperture, low in tolerance sensitivity, good in high-temperature and low-temperature stability and the like, meanwhile, scenes in front of a vehicle can be monitored more comprehensively, and through reasonable matching of all the optical lenses, the system is compact and reasonable in structure, and the system is convenient to use. The imaging system is simple in structure, low in cost, easy to assemble, low in tolerance sensitivity and more suitable for large-scale high-yield production, the overall size is reduced, axial chromatic aberration, vertical-axis chromatic aberration and high-order chromatic aberration are corrected, and it is guaranteed that the imaging system can have high imaging quality even at a large angle.

The invention discloses a method for improving the fast charging performance of a silicon-carbon composite material, and the method comprises the following steps: firstly preparing a heteroatom-doped MOF material, then precipitating by a silane cracking method, introducing silane gas and heteroatom gas, and carrying out low-temperature passivation to obtain a silicon-carbon precursor material; the preparation method comprises the following steps: preparing an organic solvent of resin, adding a graphene oxide solution, uniformly dispersing, adding a silicon-carbon precursor, performing spray drying, and introducing hydrogen at 700-1000 DEG C to reduce the obtained material. The obtained material can improve the rate capability and the cycle performance.

The invention relates to a medium-focus large-aperture long-flange video lens with a focal length of 50mm. The medium-focus large-aperture long-flange video lens comprises a first lens group, an iris diaphragm and a second lens group which are sequentially arranged along a light incidence direction of a light path, wherein the first lens group serves as an immovable fixed group, the focal power is positive, and the first lens group is composed of lenses L11-L17 which are sequentially arranged in the light incidence direction of a light path and comprises two groups of doublet lenses and a group of triplet lenses; the second lens group serves as a movable focusing group, the focal power is positive, and the second lens group is composed of lenses L21-L27 which are sequentially arranged in the light incidence direction of the light path and comprises two groups of doublet lenses and a glass aspheric lens; the focal length value f1 of the first lens group and the focal length value f2 of the second lens group satisfy 0.47 lt; f2 / f1lt; and 0.56% of the total weight. The lens achieves a large clear aperture, high MTF resolution, small distortion and reduced achromatism, is short in total optical length, and meets a camera module matched with a long flange back focus.

The utility model relates to a high-brightness low-cost DMD welcome lamp lens. An optical system of the lens is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens and a fifth lens which are sequentially arranged from left to right along a light incident light path. The lenses are made of plastic and glass materials, the first lens, the second lens, the third lens and the fourth lens are plastic aspheric lenses, and the fifth lens is a glass spherical lens. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the axial distance between the lenses and the like, the imaging performance requirement of the lens is met, the total length of the lens and the radial size of each lens are reduced, and the miniaturization of the lens group is realized.

The invention discloses a solid-state lithium battery and a preparation method thereof and belongs to the technical field of battery processing. The preparation method of the solid-state lithium battery comprises the following steps: S1, assembling a positive plate, a diaphragm and a negative plate into a dry cell; wherein a composite film layer is cured on a current collector base material of the negative plate, and rubidium nitrate is added into the composite film layer; s2, injecting the gel precursor solution into a dry battery cell, fully standing, and charging the battery cell to 100% SOC; wherein the gel precursor solution contains an electrolyte, a cross-linking agent and an initiator; and S3, heating to initiate a chemical cross-linking reaction of a cross-linking agent in the gel precursor solution, and carrying out in-situ polymerization and curing on the surface of each component of the dry cell and in internal pores thereof to obtain a gel polymer electrolyte, thereby forming the solid-state lithium battery. According to the invention, the interface resistance can be reduced, and the lithium ion transmission capability and efficiency are improved.

The utility model relates to a welcome lamp lens suitable for a DMD imaging system, an optical system is composed of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens and an eighth lens, the first lens is a meniscus concave negative lens, the second lens is a meniscus concave negative lens, the third lens is a meniscus concave negative lens, and the fourth lens is a meniscus concave negative lens. The fourth lens is a biconvex positive lens, the fifth lens is a meniscus positive lens, the sixth lens is a biconcave negative lens, the seventh lens is a biconvex positive lens, the eighth lens is a biconvex positive lens, the third lens and the fourth lens form a balsaming lens group, and the sixth lens and the seventh lens form a balsaming lens group. The first lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are all glass spherical lenses, and the second lens is a glass aspheric lens. According to the utility model, the imaging angle of the lens to an object is greater than 110 degrees, and TV Distortion can be ensured while a picture with the width of 45 cm can be projected at a position of 25 cm; 1%.

The utility model relates to a six-piece type side rear-view camera. An optical system of the camera is composed of a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from left to right along a light incident light path. Under the condition that retroflexion caused by aspheric coefficients is not considered, the first lens is a meniscus concave negative lens, the second lens is a biconvex positive lens, the third lens is a biconvex positive lens, the fourth lens is a meniscus concave negative lens, the fifth lens is a biconvex positive lens, the sixth lens is a plano-concave negative lens, and all the lenses are made of glass materials. Wherein the first lens is a glass aspheric lens, and the third lens and the fourth lens form a balsaming lens group. While 3M clear imaging is realized, the number of sheets is relatively small and the appearance size is relatively small.

The invention discloses a defective metal organic framework antioxidant nano-enzyme as well as a preparation method and application thereof, and belongs to the technical field of nano-biology. The preparation method comprises the following steps: dissolving a copper source, a zirconium source and an organic ligand containing pyrazole and carboxyl in an organic solvent, then adding a competitive ligand, uniformly mixing, and carrying out solvothermal reaction at 80-120 DEG C to prepare the defective metal organic framework; after a defective metal organic framework aqueous solution and a kidney targeting molecular solution are uniformly mixed, the defective metal organic framework anti-oxidation nano-enzyme is obtained through coordination and electrostatic adsorption effects. The organic ligand containing pyrazole and carboxyl, the competitive ligand containing carboxylic acid and the organic solvent are matched to adjust the particle size and the defect, the metal organic framework with the small particle size and the defect is prepared, the antioxidant activity is improved, kidney targeting molecules are loaded to obtain the defect metal organic framework antioxidant nano-enzyme, and the kidney targeting effect is achieved.

The utility model relates to a DMD welcome lamp lens with short total length, the lens is composed of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens from left to right along a light incident light path, the lenses are made of glass materials, the first lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are glass spherical lenses, the second lens is a glass aspheric lens, wherein the third lens and the fourth lens, and the fifth lens and the sixth lens form a balsaming lens group. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the axial distance between the lenses and the like, the imaging performance requirement of the lens is met, the total length of the lens and the radial size of each lens are reduced, and a 33 mm lens group is formed.

The invention belongs to the technical field of ethanol recovery, and relates to a preparation method of a tubular ceramic carrier-based C-ZIF-67 derived nano-porous carbon doped PDMS mixed matrix membrane and an application of the membrane in recovery of ethanol by pervaporation of a low-concentration ethanol aqueous solution. Comprising the following steps: synthesizing a ZIF-67 crystal, and carbonizing the ZIF-67 crystal to obtain C-ZIF-67 filler particles; the ZIF-67-derived nano-porous carbon particles are prepared through a high-temperature calcination method, the particles are fully carbonized at a certain calcination temperature, disappearance of characteristic groups after carbonization can reduce the influence of surface electrical properties of the particles, and the size shrinkage of the particles is reduced, so that the dispersity of the particles in a matrix membrane is improved; meanwhile, the MOF skeleton structure is still reserved after carbonization, the pore diameter is increased, the carbon material also has strong hydrophobicity, the hydrophobic large-pore-diameter separation pore channels are more beneficial to passing of ethanol molecules and promotion of the separation effect, the separation factor and the total flux are almost kept unchanged after long-time operation and use, and excellent performance is shown; good application prospects are realized.

The production line comprises a preheating furnace, a tubular furnace and a cooling furnace which are connected in sequence, the preheating furnace comprises a first furnace body, a rack, a first feeding pipe, a first discharging pipe, a preheating device and a first driving mechanism, the first furnace body is rotationally connected to the rack, and the second furnace body is rotationally connected to the rack; the two ends of the first furnace body are rotationally connected with the first feeding pipe and the first discharging pipe correspondingly, a first preheating conveying blade is arranged in the first furnace body, a material guiding barrel is arranged in the first preheating conveying blade, a second preheating conveying blade is arranged on the inner side wall of the material guiding barrel, and the preheating device and the first driving mechanism are installed on the rack. The preheating device preheats the first furnace body, and the first driving mechanism drives the first furnace body to rotate. Compared with the prior art, the catalyst carrier has the advantages that preheating and drying can be performed during preparation of the activated carbon, carbonization and activation effects are improved, carbonization and activation processes in the production process of the activated carbon can be effectively controlled, and the catalyst carrier with large aperture and high specific gravity is obtained.

The utility model discloses an optical lens. The utility model relates to a zoom lens, which sequentially comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with negative focal power, a sixth lens with positive focal power and a seventh lens with negative focal power from an object side to an image side along an optical axis, the first lens has positive focal power, the eighth lens has positive focal power, the ninth lens has positive focal power, the tenth lens has negative focal power, and the eleventh lens has positive focal power.

The utility model relates to an ultra-wide-angle high-definition surround-view camera lens, an optical system of the camera lens is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged along a light incident light path, and the fourth lens and the fifth lens form a cemented lens group; under the condition that retroflexion caused by aspheric coefficients is not considered, the first lens is a meniscus concave negative lens, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens is a meniscus concave negative lens, the object side surface is a convex surface, and the image side surface is a concave surface; the third lens is a biconvex positive lens, the object side surface is a convex surface, and the image side surface is a convex surface; the fourth lens is a biconvex positive lens, the object side surface is a convex surface, and the image side surface is a convex surface; the fifth lens is a biconcave negative lens, the object side surface is a concave surface, and the image side surface is a concave surface; the sixth lens is a biconvex positive lens, the object side surface is a convex surface, and the image side surface is a convex surface. The lens is helpful for realizing small-size high-resolution imaging and ultra-wide-angle camera shooting, and the cost is reduced.

The utility model relates to a foresight ultra-wide-angle binocular shooting optical system. The optical system of a lens is composed of a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from left to right along a light incident light path. Under the condition that retroflexion caused by aspheric coefficients is not considered, the first lens is a meniscus concave negative lens, the second lens is a meniscus convex positive lens, the third lens is a biconvex positive lens, the fourth lens is a biconvex positive lens, the fifth lens is a biconvex positive lens, the sixth lens is a meniscus concave negative lens, and all the lenses are made of glass materials. Wherein the first lens and the second lens are glass aspheric lenses, and the fifth lens and the sixth lens form a balsaming lens group. While the wide-angle 120-degree clear imaging is realized, the wide-angle 120-degree wide-angle imaging lens has a relatively small appearance size and relatively high environmental stability.

The invention belongs to the technical field of polytetrafluoroethylene microporous membranes, and relates to an Al2O3 / PTFE composite microporous membrane and a preparation method and application thereof.The Al2O3 / PTFE composite microporous membrane is composed of Al2O3 nanoparticles and PTFE resin, the porosity is 65%-95%, the thickness is 3-25 microns, the average pore size is 0.10-1.5 microns, the transverse and longitudinal tensile strength is larger than or equal to 20 MPa, and the water contact angle is smaller than or equal to 90 degrees. According to the invention, the Al2O3 / PTFE composite microporous membrane is endowed with good surface wettability and excellent mechanical property by utilizing self-humidifying and in-situ reinforcement of Al2O3 nanoparticles, and the Al2O3 / PTFE composite microporous membrane is mainly applied to a reinforcing material of a proton membrane. The preparation process is simple, and industrial popularization is easy to realize.

The utility model relates to a low total length 8M foresight main camera. An optical system of the main camera is composed of a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from left to right along a light incident light path. The lenses are made of plastic and glass materials, the first lens, the second lens, the fourth lens, the sixth lens and the seventh lens are glass spherical lenses, the third lens and the fifth lens are plastic aspheric lenses, and the sixth lens and the seventh lens form a balsaming lens group. By reasonably distributing the focal power and the surface type of each lens, the central thickness of each lens, the axial distance between the lenses and the like, the total length of the lens and the radial size of each lens are reduced while the requirements of a front-view wide-angle camera and a front-view narrow-angle camera are replaced by the low-total-length 8M ultra-wide-angle imaging performance of the lens, and the miniaturization of the lens group is realized.

The invention discloses a preparation method of a composite denitration catalyst based on a Cu-BTC metal organic framework, the composite denitration catalyst and a denitration catalytic filter material, and relates to the technical field of denitration catalysis. The preparation method comprises the following steps: taking Cu-BTC as a sacrificial template, dipping the sacrificial template in a manganese acetate mixed solution with a certain concentration, carrying out rotary evaporation at a certain temperature to dryness, then putting into a drying oven to dry a sample, and finally preparing the CuO / Cu2O / Mn3O4 composite denitration catalytic material by adopting a high-temperature carbonization and high-temperature oxidation sectional calcination method. The composite denitration catalytic material prepared in the invention presents a spherical morphology with certain pores and uniform distribution, metal oxides with different valence states have excellent oxidation-reduction performance, electron transfer between NH3 and NOx is promoted, and the process of a reduction reaction is accelerated; the metal with different valence states can promote the reaction between NH3 and NOx, and the prepared composite denitration catalyst is stable in structure, low in temperature, efficient, green, environmentally friendly, non-toxic and harmless.

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 belongs to the technical field of biological bacteriostasis and food packaging materials, and particularly relates to a carboxymethyl chitosan-covalent organic framework-nano-silver composite material and a preparation method and application thereof. According to the preparation method of the carboxymethyl chitosan-covalent organic framework-nano-silver composite material, provided by the invention, a metagen is adopted as a reducing agent, and AgNPs is synthesized through a biological method; the COF-AgNPs composite material is prepared by an in-situ growth method, and the ordered porous structure of the COF provides specific constraint for the AgNPs, so that aggregation of the AgNPs is effectively avoided; in addition, COF-AgNPs is added into a CMCS matrix, so that the film-forming ability of the COF-AgNPs is enhanced, and the CMCS matrix is endowed with excellent antibacterial performance and mechanical performance. Therefore, the composite film material prepared by adopting the preparation process can effectively improve the fresh-keeping effect of fruits and vegetables, and has a good application prospect in the field of packaging film materials for fruit and vegetable fresh-keeping.

The utility model relates to the technical field of water purification equipment, and discloses an ultrafiltration membrane water purification assembly which comprises a water purification pipe, a first filter plate and a second filter plate are movably mounted in the water purification pipe, a water supply pipe is arranged at one end of the water purification pipe, an adjusting assembly is arranged in the water purification pipe, and the adjusting assembly comprises a limiting rod and a positioning block. The limiting rod is fixedly connected with the water purification pipe, the positioning block is fixedly connected with the first filter plate, the positioning block is in sliding connection with the limiting rod, and the second filter plate abuts against the first filter plate, so that the first filter plate and the second filter plate rotate relatively, the hole diameters of the first filter plate and the second filter plate are aligned, and the diameter of a filter hole is increased; when the water pressure is reduced, the first filter plate and the second filter plate are restored to the initial positions under the elastic force action of the elastic piece, so that the filter holes in the first filter plate and the second filter plate are restored to the staggered state, and the device has the effect of conveniently and automatically adjusting the aperture of the ultrafiltration membrane.

The embodiment of the invention provides a projection lens and projection equipment. Wherein the projection lens sequentially comprises a first lens group, a diaphragm and a second lens group from an imaging side to an image source side along an optical axis; the first lens group is composed of a first lens, a second lens and a third lens, the first lens is a plastic aspherical lens, and the second lens and the third lens are glass spherical lenses; the second lens group is composed of a fourth lens, a fifth lens and a sixth lens, the fourth lens and the fifth lens are glass spherical lenses, and the sixth lens is a glass aspheric lens; the diaphragm is positioned between the third lens and the fourth lens; the projection lens satisfies the following conditions: 2 < T / D < 3.5; wherein T is the total optical length of the projection lens, and D is the maximum effective clear aperture in the first lens group.

The invention discloses a lacidipine film-controlled sustained-release pellet capsule and a preparation method thereof, relates to the technical field of medicines, and aims to solve the problem of release reduction caused by film aging of a lacidipine film-controlled sustained-release pellet prepared by an aqueous dispersion coating. The preparation method comprises the following steps: respectively weighing a lacidipine bulk drug, a polymer carrier material and a plasticizer according to a prescription amount, grinding and uniformly mixing to prepare the lacidipine solid dispersion. A sustained-release coating film of the pellet capsule contains Eurdragit RL30D, a plasticizer triethyl citrate and an anti-sticking agent talcum powder, and a pellet core contains croscarmellose sodium and an excipient. According to the lacidipine solid dispersion solid preparation provided by the invention, lacidipine exists in the carrier material in a microcrystalline state, an amorphous state, a colloidal dispersion state or a molecular dispersion state, so that the lacidipine solid dispersion solid preparation has high dispersity, the dissolution speed of a medicine is accelerated, the absorption of the medicine can be promoted, and the bioavailability is improved.

The utility model discloses a prime lens. The prime lens 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 an object side to an image side along an optical axis, the first lens has negative focal power, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens has positive focal power, the object side surface of the second lens is a concave surface, and the image side surface is a convex surface; the third lens has positive focal power, the object side surface of the third lens is a concave surface, and the image side surface is a convex surface; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has negative focal power, the object side surface of the sixth lens is a concave surface, and the image side surface is a convex surface; the seventh lens has positive focal power; the eighth lens has negative focal power.

The utility model discloses a prime lens, which sequentially comprises a first lens with negative diopter, a second lens with negative diopter, a third lens with negative diopter, a fourth lens with negative diopter, a fifth lens with negative diopter and a sixth lens with negative diopter from an object side to an image side, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens has diopter; a fifth lens having a diopter; the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a concave surface; the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a convex surface; an eighth lens having a diopter; a ninth lens having a diopter; the positive and negative attributes of the symbols of the diopters of the fourth lens and the fifth lens are opposite; positive and negative attributes of symbols of diopters of the eighth lens and the ninth lens are opposite; the combined focal length F67 of the sixth lens and the seventh lens and the total effective focal length F of the prime lens meet the condition that F67 / F is larger than or equal to 2.62 and smaller than or equal to 3.53.