240 results about "Light absorber" patented technology

A light absorber 10 has a transmission spectrum satisfying the following requirements (I), (II), (III), (IV), and (V) at an incident angle of 0°. The light absorber 10 has a haze less than 0.20%. (I) An average transmittance TA0deg(460-600) is 75% or more. (II) A shorter cut-off wavelength λH0deg(s) is in a range of 390 nm to 450 nm. (III) A longer cut-off wavelength λH0deg(L) is in a range of 600 nm to 680 nm. (IV) An average TA0deg(300-380) is 1.2% or less. (V) An average TA0deg(750-1000) is 1.2% or less.

The invention relates to the technical field of optical materials and nano structures, in particular to an ultraviolet broadband light absorber based on graphene and a multi-layer periodic structure. The structure of the ultraviolet broadband light absorber sequentially comprises a graphene layer, a distributed Bragg reflection grating structure layer and a SiO2 substrate at the bottom from top to bottom. The preparation process of the ultraviolet broadband light absorber comprises the following steps: preparing the graphene layer; a SiO2 layer is deposited; depositing a TiO2 layer; carrying out multi-layer superposition; adding a graphene layer; and completing the device. The light absorption efficiency of graphene in the ultraviolet band is greatly improved, broadband efficient absorption within the wavelength range of 240-370 nm is achieved, the highest absorption rate can reach 99.75%, the absorber is not sensitive to polarization, the preparation process is simple, and technical support is provided for design of the efficient ultraviolet absorber.

The invention discloses a fano resonance-based color radiation refrigeration film and a preparation method thereof, the film comprises a structure M1D1M2D1AD 'which are sequentially stacked from bottom to top, the structure of the film is an asymmetric structure, M1 represents a first metal layer, M2 represents a second metal layer, A represents an absorption layer, D1 represents a first dielectric layer, and D' represents a symmetrical dielectric layer unit of a film material; the M1D1M2 structure is in a discrete state and serves as a narrow-band light absorber, the M2D1AD'structure is in a continuous state and serves as a broadband light absorber, D 'serves as an antireflection layer in a continuous state, and the narrow-band light absorber and the broadband light absorber are coupled by sharing the second metal layer M2 to achieve fano resonance. The high-purity and color-adjustable reflection type structural color is achieved, the high reflectivity is achieved in the solar spectrum wave band, the high emissivity is achieved in the atmosphere window, and therefore the excellent radiation refrigeration effect is achieved.

The invention discloses an energetic slurry toughening and photocuring 3D printing method, relates to a preparation method of energetic slurry, and aims to solve the problems that an existing energetic material is poor in mechanical property, poor in toughness and easy to crack; the particles are fast to settle in the light-cured resin, the stability is poor, and the printing precision is poor. The invention develops a photocuring high-energy resin for photopolymerization additive manufacturing. The composition contains a high-energy filler, an acrylate adhesive, whiskers and an inert plasticizer. The material has the characteristics of compatibility, printability and mechanical property, and the possibility of printing increasingly complicated high-energy articles is proved through experiments. The preparation method of the light-cured resin comprises the following steps: adding the low polymer bisphenol A epoxy acrylate and the six-functionality polyurethane acrylate; diluting monomers including 1, 6-hexanediol diacrylate and trimethylolpropane triacrylate; uniformly mixing an auxiliary agent, a thickening agent and a dispersing agent, and magnetically stirring for 30 minutes to obtain the light-cured resin. A preparation method of the energetic slurry comprises the following steps: mixing light-cured resin, whiskers, an inert plasticizer, energetic particles, a photoinitiator and a light absorber, and uniformly stirring to obtain the energetic slurry; after the energetic slurry is used for 3D printing, a sample piece is obtained, the yield reaches 95%-100%, the cost is low, preparation is easy, and the method can be applied to the field of energetic slurry 3D printing.

The invention discloses a photocuring 3D (three-dimensional) printing thermoplastic elastomer material and a printing method, specifically, a styrene-butadiene-styrene block copolymer (SBS) and a multi-sulfydryl cross-linking agent are used as matrixes, trimethylbenzene is used as a solvent diluent to adjust the viscosity of a system, and a photoinitiator, a light absorber and a dye are used as assistants to prepare the photocuring 3D printing thermoplastic elastomer material. A thermoplastic elastomer material suitable for photocuring 3D printing is prepared, elastomer organic gels in different shapes are printed on a photocuring 3D printer, and a volume-shrunk elastomer finished product is obtained after a solvent is removed. The range of the 3D printing photocuring elastomer material is widened, photocuring 3D printing of the thermoplastic elastomer is achieved for the first time, and the thermoplastic elastomer material has important application prospects.

The invention discloses a polyurethane blue light protection optical material and a preparation method thereof. The polyurethane blue light protection optical material is formed by polymerizing a three-component system of isocyanate, a thiopropane trithiol compound and a light absorber mixture, has the advantages of high refractive index and high light transmittance, also has excellent blue light selective protection capability, can perform accurate regulation and control protection on blue light with different wavelengths of 385-500nm, and has good application prospects. The refractive index of an optical lens made of the blue-light-resistant material is larger than or equal to 1.71, the transmittance of short-wave blue light of 385-445 nm is smaller than or equal to 32.2%, the transmittance of long-wave blue light of 475-500 nm is larger than or equal to 70%, the transmittance of visible light of 600-780 nm is larger than or equal to 90%, and a wider material selection range is provided for application of high-end blue-light-resistant optical components.

The invention discloses a full-automatic machining device based on pipeline support manufacturing, and relates to the technical field of metal machining, the full-automatic machining device comprises a base, a plurality of supporting strips mounted at the top of the base and a laser cutting machine mounted at the top of the base, and further comprises a material guiding mechanism and a material conveying mechanism, the cover body is arranged at the top of the base, the vacuum fixing assembly is installed in the cover body, and the displacement assembly is used for driving the cover body to move. The composite treatment mechanism comprises two sliding blocks arranged in the cover body, cleaning rollers installed on the outer walls of the opposite sides of the two sliding blocks correspondingly, polishing rollers installed at the bottoms of the sliding blocks and a linkage assembly used for driving the two sliding blocks to move; after the strip-shaped support is cut through laser, the strip-shaped support is transferred away, the strip-shaped support is sequentially subjected to light absorbent cleaning, notch polishing and cooling treatment, and the problem that in the prior art, follow-up treatment operation on the strip-shaped support is complex is solved.

A transmission spectrum of a light absorber 10 at an incident angle of 0° satisfies the following requirements: (I) an average transmittance in a wavelength range of 450 nm to 600 nm is 75% or more; (II) a first wavelength that lies in a wavelength range of 350 nm to 450 nm and at which a transmittance is 50% is 380 nm or more and 440 nm or less; (III) a second wavelength that lies in a wavelength range of 650 nm to 750 nm and at which a transmittance is 50% is 680 nm or more and 740 nm or less; (IV) a maximum transmittance in a wavelength range of 350 nm to 370 nm is 1% or less; (V) a maximum transmittance in a wavelength range of 800 nm to 900 nm is 5% or less; and (VI) a maximum transmittance in a wavelength range of 1100 nm to 1200 nm is 5% or less.

The invention relates to a laser edge sealing adhesive raw material resin capable of realizing laser absorption sintering and a method for preparing the resin. The method comprises the following steps: uniformly mixing hot melt adhesive resin, an antioxidant, a nucleating agent, a hardening agent, a light absorber, a heat conducting agent, a coloring agent and an adhesion promoter through a screw, extruding and granulating to obtain the laser edge sealing resin capable of realizing laser absorption sintering edge sealing. Comprising but not limited to furniture edge sealing glue, panel coating glue and the like.

The invention relates to the technical field of energy-saving building materials, and discloses a multi-layer composite sunshade film with a self-cleaning function, which sequentially comprises a release film layer, a bonding layer, a base material layer I, a spectrum functional layer, a base material layer II and a self-cleaning layer from inside to outside, the raw material of the spectrum functional layer comprises at least one of an infrared absorbent, a visible light absorbent and an ultraviolet absorbent; the self-cleaning layer is a modified layer obtained by modifying the surface of the base material layer II through fluorosilane. According to the sunshade film, the energy-saving performance of a building can be greatly improved, so that the maintenance cost is reduced, and the sunshade film is suitable for being used outdoors for a long time and can also be attached to the outer surface of the building for use.

To provide an optical filter advantageous for exhibiting desired transmissivity characteristics even without comprising a near infrared ray reflection film.SOLUTION: An optical filter 1a comprises a first light absorber 11 and a second light absorber 12. The first light absorber 11 contains an organic dye. The second light absorber 12 contains a copper component, and absorbs at least part of infrared rays. The optical filter exhibits a first transmission spectrum satisfying the following conditions: (I) an average value TA450-600 of a transmissivity in a wavelength range of 450 nm to 600 nm is 76% or more; (II) a first cutoff wavelength λF falls in a range of 360 nm to 450 nm; (III) a second cutoff wavelength λS falls in a range of 600 nm to 700 nm; and (IV) a maximum value TM700-750 of a transmissivity in a wavelength range of 700 nm to 750 nm is 5% or less.SELECTED DRAWING: Figure 1

The invention provides photocuring 3D printing silicone rubber ink and a preparation method and a printing method thereof. The photocuring 3D printing silicone rubber ink comprises the following components in parts by mass: 100 parts of vinyl polysiloxane; 4 to 29 parts of sulfydryl grafted polysiloxane; 10 to 50 parts of surface modified fumed silica; 0.1 to 0.5 part of a photoinitiator; 1-5 parts of a light absorber; and 10-220 parts of a diluent. According to the photocuring 3D printing silicone rubber ink, firstly, sulfydryl grafted polysiloxane serves as a cross-linking agent and is cross-linked with vinyl terminated polysiloxane to form a silicone rubber elastomer, secondly, the mechanical property of the silicone rubber elastomer is enhanced through surface modified fumed silica, and then the viscosity of the silicone rubber elastomer is adjusted through the diluent; and finally, the curing depth of the silicone rubber elastomer is adjusted through the light absorber, so that the ink suitable for photocuring 3D printing is obtained, and the contradiction that high mechanical property and low viscosity of traditional photocuring 3D printing silicone rubber cannot be achieved at the same time is overcome.

The invention belongs to the technical field of precision casting, and discloses light-cured silicon-based ceramic core slurry for investment casting as well as a preparation method and application of the light-cured silicon-based ceramic core slurry. The silicon-based ceramic core slurry is prepared from the following components in parts by weight: 70-85 parts of ceramic powder, 10-25 parts of photosensitive resin, 2-5 parts of a photoinitiator, 1-5 parts of a dispersing agent, 0.2-1.2 parts of an anti-settling agent and 0.01-0.2 part of a light absorber, wherein the total weight of the silicon-based ceramic core slurry is 100 parts; the ceramic powder is prepared from fused quartz powder, aluminum oxide ceramic powder and zirconium silicate ceramic powder according to the weight ratio of (50-90): (5-15): (2-10). The slurry is stable in flowing and settling performance, can be used for additive manufacturing and photocuring integrated forming of a silicon-based ceramic core with high strength, high precision, low sintering shrinkage rate and high porosity, and is of great significance for batch production of complex ceramic cores for the investment casting industry.

The invention provides an adhesive film and laminated glass. The adhesive film comprises a first heat insulation layer, a sound insulation and heat insulation layer and a second heat insulation layer which are sequentially overlapped, the material of the first heat insulation layer comprises an infrared light absorbent and first resin; the materials of the sound insulation and heat insulation layer comprise a heat insulation agent and second resin; the material of the second heat insulation layer comprises an infrared light reflecting agent and third resin; wherein the tan delta of the sound insulation and heat insulation layer is greater than 0.2 at the temperature of 20 DEG C below zero to 50 DEG C. The adhesive film disclosed by the invention realizes dual functions of efficient heat insulation and sound insulation by combining three different principles of absorption type heat insulation, damping sound insulation and reflection type heat insulation. The first heat insulation layer and the second heat insulation layer reduce penetration of heat by absorbing and reflecting infrared light, and the sound insulation and heat insulation layer enhances the heat insulation performance of the adhesive film while improving the sound insulation performance of the adhesive film through the synergistic effect of the high-damping second resin and the heat insulation agent.

The present application relates to a light spot analysis system, which comprises a shell and an analysis assembly, the shell is provided with an opening, and the analysis assembly is arranged in the shell and used for light spot analysis, the analysis assembly comprises a collimating lens, a wedge prism used for decomposing laser into a reflected light beam and a transmitted light beam, a measuring camera used for measuring the reflected light beam, and a tail light absorber used for absorbing the transmitted light beam, the collimating lens is arranged at the opening, and the wedge prism is arranged between the collimating lens and the measuring camera, wherein one analysis assembly is provided with a focusing lens, and the focusing lens is arranged between the wedge prism and the measuring camera. The present application can be applied to high-power laser measurement analysis of different wavelengths, and cost reduction is realized at the same time.

The invention relates to the technical field of high polymer materials and discloses 3D printing light-cured resin as well as a preparation method and a printing process thereof. The 3D printing light-cured resin is prepared from the following raw material components: acrylic resin, a photoinitiator, a light absorber, color paste and an auxiliary agent, wherein the acrylic resin is selected from at least one of polyurethane acrylic resin, polyester acrylic resin, epoxy acrylic resin and polyether acrylic resin; the number-average molecular weight of the acrylic resin is 1000 to 10000 g / mol, and the viscosity of the acrylic resin under the condition of 25 DEG C is 40000 to 1200000 cps; and / or the viscosity of the acrylic resin at 60 DEG C is 3000-300000cps, and the ratio of the raw material components is limited, and the steps of the preparation method and the temperature of a printer resin tank in the printing process are controlled, so that the prepared printed finished product has good mechanical property, high notch impact strength and low size shrinkage.

The invention discloses a method for recycling and reusing polyurethane foam. The method includes: (1) The functionalized oligomers are obtained by adding solvent and catalyst to the polyurethane foam. (2) The functionalized oligomers are chemically modified, and the photosensitive group is introduced through the functional group reaction. The diluent, photoinitiator, and light absorber, etc. are introduced into the obtained oligomers to prepare photocurable resin. It can be used for photocurable coatings or 3D printing. This method has a fast reaction time, easy recovery of solvent and catalyst, higher value-added recycled product, good economic benefits, and social value.

An acrylic resin composition for a sensor cover, comprising: an acrylic resin (A); and a light absorber (B). The acrylic resin composition has a deflection temperature under load of 110 DEG C or more. A molded body of the acrylic resin composition having a thickness of 1 mm has optical properties satisfying all requirements (i) to (v). (i) The maximum transmittance is 10% or less when light having a wavelength of 380-700 nm is caused to enter the molded body at an angle of incidence of 0 DEG. (ii) the minimum transmittance is 85% or more when light having a wavelength of 850-950 nm is caused to enter the molded body at an angle of incidence of 0 DEG; (iii) the average transmittance is 85% or more when light having a wavelength of 1,500-1,600 nm is caused to enter the molded body at an angle of incidence of 0 DEG; (iv) 0.9 < = (transmittance of light when light having a wavelength of 900 nm enters the molded body at an angle of incidence of 60 DEG) / (transmittance of light when light having a wavelength of 900 nm enters the molded body at an angle of incidence of 0 DEG) < = 1.1; and (v) 0.9 < = (transmittance of light when light having a wavelength of 1,550 nm enters the molded body at an incidence angle of 60 DEG) / (transmittance of light when light having a wavelength of 1,550 nm enters the molded body at an incidence angle of 0 DEG) < = 1.1.

The invention discloses a bottom anti-reflection composition for 193 nm photoetching. The bottom anti-reflection composition comprises the following components in parts by weight: 50-200 parts of a compound as shown in a formula I, 1-100 parts of a cross-linking agent, 0.01-50 parts of a light absorbent, 0.01-50 parts of a photoacid generator and a solvent. The coating prepared from the composition provided by the invention has relatively strong anti-reflection capability, and an etching process can be avoided.

An adhesive composition for forming an adhesive layer that temporarily bonds a semiconductor substrate or electronic device to a light-transmitting support, the adhesive composition comprising: (a) a light absorber, a polyisocyanate, and a polyol; or (b) a light absorber, a polyurethane resin comprising polymeric carbon-carbon unsaturated bonds, and a polymerization initiator.

A structure includes a polarization device such as a polarization splitter, a polarization combiner or a polarization splitter rotator including a waveguide having a light absorber at an end section with an at least hook shape, e.g., it can be hooked or spiral shape. The structure also includes another waveguide adjacent the stated waveguide. The hook or spiral shape acts as a light absorber that reduces undesired optical noise such as excessive light insertion loss and / or light scattering. The hook or spiral shape may also be used on supplemental waveguides used to further filter and / or refine an optical signal in one of the waveguides of the polarization device, e.g., downstream of an output section of the polarization splitter and / or rotator.

The invention provides a 3D printing material suitable for photocuring and a preparation method thereof. The 3D printing material comprises an acrylic-terminated hydrogenated nitrile rubber prepolymer, a reactive diluent, a photoinitiator and a light absorbing agent, the structural general formula of the acrylic-terminated hydrogenated nitrile rubber prepolymer is as shown in formula 1, and in the formula 1, R1 and R4 are respectively and independently at least one of C2-C10 alkylene groups; r < 2 > and R < 5 > are respectively and independently at least one of alkylene groups of C < 2 > to C < 10 >; r3 and R6 are respectively and independently at least one of the following; x is 10-40, y is 10-40, and z is 10-40. The 3D printing material provided by the invention can be rapidly cured to realize 3D printing, the oil resistance of the 3D printing material is equivalent to that of traditional HNBR, repeated printing and parallel printing can be realized, and a 3D printing product has a shape memory effect.

This application provides a long-wave infrared light absorber based on phase change materials and MIM structures, belonging to the field of integrated photonic devices. The absorber includes a reflective layer, a double dielectric layer, and a metasurface layer. The metasurface layer allows light waves to enter the double dielectric layer through diffraction. The reflective layer and the metasurface layer form two reflective surfaces, allowing the light waves to undergo multiple reflections and achieve FP-cavity resonance. When the metasurface layer is crystalline and the polarization state of the light wave is not parallel to that of the metasurface layer, both the reflective layer and the metasurface layer possess metallic properties, enabling plasmon resonance when the frequency of the incident light wave matches the collective oscillation frequency of free electrons in the metal. Both FP-cavity resonance and plasmon resonance lead to the localization and enhancement of the electromagnetic field within the double dielectric layer, thereby enhancing the absorption of light waves. This application achieves reversible switching between two light wave absorption states by changing the phase state of the phase change material.

The utility model provides a rotary positioning device and three-dimensional scanning equipment. The rotary positioning device comprises a rotary support, an optical measurement assembly and a control assembly. An optical measurement assembly is arranged on the rotary support and is used for driving the optical measurement assembly to rotate; the optical measurement assembly comprises a positioning coding piece, a light emitter and a light absorber; the light emitter and the light absorber are arranged on the two opposite sides of the positioning encoding part, the light emitter is used for emitting light, and the light absorber is used for collecting information of the quantity of light passing through the positioning encoding part; the control assembly is electrically connected with the light emitter and the light absorber and used for controlling the light emitter to emit light and receiving light quantity information output by the light absorber. According to the rotary positioning device, the control assembly can control the light emitting device to emit light, light emitted by the light emitting device returns to the light absorber after passing through the positioning encoding part, and whether the positioning encoding part is deformed or not is judged according to light quantity information collected by the light absorber, namely the number of absorbed light sources, so that self-inspection is achieved, the use precision of the rotary positioning device is ensured, and use requirements are met.

The present invention provides a protective film agent and a method for processing a workpiece, the protective film agent being capable of forming a protective film suitable for processing with a laser beam. The protective film agent is coated on a workpiece when the workpiece is processed, the protective film agent comprising: a water-soluble resin; a light absorber having a flavone structure, a flavonol structure, or an isoflavone structure; and a solvent that dissolves the resin and the light absorber.

The application relates to the technical field of high polymer composite materials, in particular to a zinc-aluminum-magnesium alloy steel-plastic co-extrusion floor composite material and a preparation method thereof, which comprises the following components in percentage by mass: 70-80% PE resin; 10-20% PMMA resin; 5-10% toughening agent; 2-5% compatilizer; 0.5-2% antioxidant; 0.5-1% light stabilizer; 1-5% light absorber; 1-2% lubricant; the above raw materials are weighed according to the proportion, mixed uniformly in a high-speed batching stirrer, melt-extruded and granulated in a double-screw extruder, and after water tank cooling, granulation and drying treatment, the composite material is obtained; through formula synergistic modification, the performance goals of low gloss, high wear resistance, excellent aging resistance and size stability of the material are realized; meanwhile, the application also provides a preparation method of the alloy material, which is simple, controllable and suitable for industrial large-scale production.

Provided is a novel antibody-light absorber conjugate for PIT. Provided is an antibody-light absorber conjugate for repeated administration in optimal photoimmunotherapy (PIT) for humans.

The light absorber (10) has a transmission spectrum satisfying the following conditions (I), (II), (III), (IV), and (V) at an incidence angle of 0 DEG. The light absorber 10 has a haze of less than 0.20%. (I) The average value TA0deg (460-600) is 75% or more. (II) The short wavelength-side cutoff wavelength [lambda] H0deg (S) is from 390 nm to 450 nm. (III) The cutoff wavelength [lambda] H0deg (L) on the long wavelength side is 600 nm to 680 nm. (IV) The average value TA0deg (300-380) is 1.2% or less. (V) The average value TA0deg (750-1000) is 1.2% or less.

The invention provides a cesium lead bromide quantum dot / single-layer molybdenum disulfide 0D / 2D heterojunction photoelectric sensor and a preparation method thereof, and belongs to the technical field of photoelectric devices. Constructing a patterned bottom electrode by adopting an Au / p + type silicon substrate / SiO2 structure; preparing a single-layer molybdenum disulfide (MoS2) film by a mechanical stripping method, and transferring the single-layer molybdenum disulfide (MoS2) film to the patterned silicon wafer electrode; and spin-coating the single-layer molybdenum disulfide film with the quantum dot solution, drying and annealing to obtain the cesium lead bromide quantum dot / single-layer molybdenum disulfide 0D / 2D heterojunction photoelectric sensor. According to the invention, CsPbBr3 QDs with efficient light absorption and single-layer MoS2 with high carrier mobility are integrated together, and CsPbBr3 QDs are used as an effective light absorbent to enhance a local electric field around MoS2. And by utilizing the synergistic effect of the CsPbBr3 QDs and the single-layer MoS2, the separation rate of photon-generated carriers in the heterojunction is accelerated, and the light absorption capability of the MoS2 device is improved. The p + type silicon substrate is combined with the annealing process, a Br-rich passivation ultra-clean II type heterojunction interface is constructed, and the charge separation efficiency and the environmental stability are remarkably improved.

The invention discloses hydrogel microsphere-based bio-ink capable of being used for layer-by-layer photocuring 3D printing, and belongs to the field of biomedical and tissue engineering materials. The invention provides bio-ink which is composed of hydrogel microspheres capable of being photo-crosslinked, a small amount of cross-linking agent (the microspheres can be self-crosslinked without being added), a photoinitiator and a light absorber, and a printing structure is formed through a photo-crosslinking reaction among the hydrogel microspheres in layer-by-layer photo-curing 3D printing. An object printed by the bio-ink is composed of a three-dimensional structure formed by closely packing microspheres, the cell entrapment capacity and biological activity of the bio-ink are effectively improved through pores among the microspheres, and printing of a complex heterostructure can be achieved through modularization of the microspheres. The bio-ink disclosed by the invention has relatively small swelling property, excellent printing performance and cell loading capacity, is specifically applied to loading cell printing and multi-material printing experiments, and has good application prospects in biological manufacturing and tissue engineering.