100 results about "Optical stability" patented technology

The invention discloses a gasket structure capable of eliminating real-shot stray light, which comprises the following steps of: S1, designing a chamfering structure, namely, accurately setting the thickness of an ultra-thin gasket to be 0.022 / 0.033 mm, manufacturing the chamfering structure in an inner hole, and performing rigorous optical simulation and experimental optimization; s2, material selection and surface treatment are coordinated, material screening focuses on the characteristics of low reflectivity and high optical stability, and optical-grade polycarbonate has good optical transparency, low refractive index and excellent mechanical performance. The light propagation path is changed through unique design, and the influence of stray light on imaging is reduced to the maximum extent. By effectively eliminating the stray light, the image contrast of the imaging system is improved, the definition is obviously improved, more image details can be clearly presented, and the application scene requirement harsh for the imaging quality is met. The reduction of stray light interference helps to reduce the noise level of an optical system, improves the stability and reliability of the system, reduces the equipment fault and maintenance frequency caused by the stray light problem, and reduces the use cost.

The invention discloses a UV curing adhesive for coating a low-refractive-index optical fiber and a processing method thereof, belongs to the technical field of adhesive preparation, and is used for solving the technical problem that the refractive index and the damp-heat resistance of the UV curing adhesive for coating the optical fiber in the prior art need to be further improved. The preparation method comprises the following steps: introducing a low-refractive-index hybrid siloxane prepolymer, a multi-component interface bonding prepolymer and a modified branched polyester prepolymer into a system together, and constructing a compact and uniform organic-inorganic three-dimensional network in a curing process by utilizing silica condensation, interface chemical bonding and a flexible chain segment cross-linking reaction, the low-refractive-index hybrid siloxane prepolymer endows a film layer with a stable refractive index, the multi-component interface bonding prepolymer enhances the binding force of a base material, the modified branched polyester prepolymer improves stress buffering and toughness, and the obtained cured film is low in refractive index, firm in interface bonding and small in mass change in a humid and hot environment and shows excellent optical stability and long-term reliability.

The invention relates to the technical field of biological medicines, and particularly discloses a BODIPY (boron dipyrromethene)-based compound and an application of the BODIPY-based compound in photodynamic oxidation of beta-amyloid protein (Abeta). The compound takes iodo-BODIPY as a photosensitive core and is connected with 4-t-butyloxycarboryl benzene as an A beta recognition group. The introduction of iodine atoms significantly enhances the intersystem crossing ability of molecules, so that the molecules have excellent reactive oxygen species (ROS) generation ability. The compound has high ROS yield, good optical stability and biocompatibility, can specifically target A beta aggregate, realizes photodynamic oxidative degradation, and provides a novel potential tool for treatment of Alzheimer's disease.

The invention relates to the technical field of peep-proof film manufacturing, and discloses a high-light-transmittance peep-proof film based on surface modification and a preparation method of the high-light-transmittance peep-proof film. The preparation method comprises the following steps: sequentially carrying out plasma activation, ALD atomic layer deposition and HEMA carboxyl-based layer polymerization on a PET film to obtain a modified PET film; coating the modified PET film with a dispersion liquid prepared from a polystyrene-polymethylacrylic acid solution and graphene quantum dots to form a peep-proof layer; depositing a TiO2 layer and a SiO2 layer on the modified PET film to form a high refractive index layer; diamond particles, MoS2 nanosheets and resin are mixed and coated on the high-refractive-index layer to form the wear-resistant layer. The PET film is modified through plasma activation, atomic layer deposition and free radical polymerization, the physical adsorption limitation of a traditional coating is broken through, chemical covalent binding with a subsequent functional layer is achieved, meanwhile, a light scattering path is optimized by preparing a TiO2 / SiO2 alternating layer, and the peep-proof effect and the optical stability are improved.

The invention belongs to the technical field of reflectors, and particularly discloses a reflector preparation method based on micro-channel heat dissipation, and the method comprises the steps: obtaining a first mirror body and a second mirror body, and plating a reflecting film on one side of the first mirror body and one side of the second mirror body; the method comprises the following steps: performing micro-fluidic groove parameterization design according to three-dimensional data of a lens body, establishing an optimization model which only takes geometric parameters as independent variables, outputting performance evaluation indexes through coupling heat transfer-fluid-structure simulation, and performing iterative updating on the geometric parameters based on an evaluation result; processing parameters are generated, a micro-flow groove is formed through picosecond laser etching, and the groove wall is polished through femtosecond laser; deionized water washing, cerium oxide grinding, sodium bicarbonate cleaning and secondary washing are sequentially carried out; and bonding the two mirror bodies into a mirror surface. According to the method, under the condition that processing, tolerance and operation boundary constraints are met, comprehensive optimization of low temperature rise, low surface shape change and low pressure drop of the mirror surface is achieved, and the optical stability and reliability under high-power application are improved.

The application discloses an anti-ultraviolet aging polycarbonate modified material and application thereof, and belongs to the technical field of polymer material modification. The material comprises synergistically modified polycarbonate, an organic small-molecule functional regulator, an antioxidant, a light stabilizer, a lubricating dispersant and an inorganic filler, wherein the synergistically modified polycarbonate is constructed into a multiple synergistic network by introducing a borate dynamic covalent structure, a Schiff base structure and a rare earth coordination structure, and the organic small-molecule functional regulator is p-hydroxybenzophenone. The preparation method comprises preparation of the synergistically modified polycarbonate and a subsequent melt blending and extrusion process. Through the technical scheme, the synergistic effect of ultraviolet absorption, energy transfer and free radical inhibition is realized, the yellowing degree of the material is significantly reduced, the mechanical property retention rate and the optical stability are improved, and the material is suitable for the fields of automobile transparent parts, outdoor optical materials and electronic and electrical shell.

The application belongs to the technical field of automobile intelligent display and polymer optical material, and relates to a front windshield anti-reflection film for automobile AR-HUD and a preparation method thereof. The anti-reflection film comprises modified optical acrylic resin, 9,9-bis(4-hydroxyphenyl) fluorene, nano-silica sol, ultraviolet absorber, light stabilizer and leveling agent. The modified optical acrylic resin is modified by introducing o-diphenol structural unit, aryl boronic acid structural unit, beta-cyclodextrin structural unit and adamantane structural unit into the acrylate base structure to form a dynamic borate ester bond and a host-guest inclusion synergistic topological network structure through free radical copolymerization. The anti-reflection film significantly improves the reflection efficiency of the target wave band of AR-HUD while maintaining high visible light transmittance, and exhibits excellent optical stability and double image control ability in a humid heat environment, and is suitable for the field of optical functional film of automobile front windshield.

This invention relates to the field of perovskite solar cell technology, and more particularly to cesium-based perovskite solar cells and their fabrication methods. In the fabrication process of perovskite solar cells, aromatic nitrile molecules are used in combination with cesium halide as a SAM layer. The two synergistically optimize the crystal quality, interface passivation, and charge transport process of the perovskite layer, reducing non-radiative recombination losses, thereby significantly improving the cell efficiency; Cs + The synergistic effect with halogen elements enhances the water, thermal, and optical stability of the perovskite material interface, ensuring that the device can maintain a high initial efficiency after long-term operation. At the same time, cesium halide optimizes the crystallization process of perovskite, and aromatic nitrile molecules can improve the wetting characteristics of perovskite precursors on SAM substrates. The two work together to promote the formation of more uniform, dense, and high-quality perovskite films and reduce interface defects.

The application discloses a kind of high fluorescent quantum efficiency and high stable molecular sieve confined CsPbBr3 quantum dot composite material and preparation method thereof, and relates to the technical field of optoelectronic materials.Adopt high-temperature solid-phase reaction and in-situ encapsulation strategy to restrict CsPbBr3 quantum dot in Mg-doped pure-silicon zeolite molecular sieve inside, and obtain molecular sieve confined CsPbBr3 quantum dot composite material.The molecular sieve confined CsPbBr3 quantum dot composite material provided by the application shows excellent optical stability and extremely high fluorescent quantum efficiency, and the fluorescent quantum efficiency can reach 97.4%, and the preparation method is suitable for mass production.

The invention belongs to the technical field of fluorescent materials, and particularly relates to a planar chiral [2.2] cycloaromatic compound as well as a preparation method and application thereof, and the planar chiral [2.2] cycloaromatic compound comprises a planar chiral [2.2] cycloaryl-4-(dicyanomethylene)-4H-pyran compound with a structure as shown in a formula (I). The planar chiral [2.2] cycloaromatic compound is prepared and is modulated under the assistance of acid to obtain the white-light organic circularly polarized light-emitting solid material, the white-light material has circularly polarized light-emitting performance, a white light preparation method is simple, and the planar chiral [2.2] cycloaromatic compound is convenient to purify, high in yield and good in optical stability and can be used for preparing the white-light organic circularly polarized light-emitting solid material. The white circularly polarized luminescent material can be prepared, and the technical problems that in the prior art, a planar chiral white light circularly polarized luminescent material of a [2.2] cyclic aromatic structure is complex in preparation process, high in cost and difficult to widely apply are solved. # imgabs0 #

The invention belongs to the technical field of biological detection, and particularly relates to a nitrogen-containing heterocyclic compound, a preparation method thereof, a fluorescent probe and application. The nitrogen-containing heterocyclic compound provided by the invention has a structure as shown in the following general formula (I): # imgabs0 #, is simple in structure, has good chemical and optical stability, can be used for imaging fungi such as cryptococcus neoformans, has application potential for judging fungal infection conditions, and in addition, has good application prospects. The compound can be combined with intein of fungi through sulfydryl reaction, shows good specificity as a targeted fluorescent probe, and realizes rapid evaluation and screening of Prp8 intein inhibitor candidate compounds.

The invention relates to the technical field of stimulated emission depletion (STED) super-resolution imaging probes, in particular to design synthesis based on curcumin compound molecules containing a beta-dicarbonyl fluorine boron skeleton and a preparation method of a low-power STED nano-particle probe. According to the invention, the curcumin derivative compound with the beta-dicarbonyl fluorine boron skeleton is synthesized, and the constructed host and guest body type TADF nanoparticles realize low-power STED biological imaging. The preparation method of the host-guest doped nanoparticles is simple and economical, and the host-guest doped nanoparticles have high luminance and TADF characteristics. As an STED nano-particle probe, the material has the advantages of high optical stability and low saturation power, so that ultrahigh-resolution imaging is realized.

The invention discloses a lens for a projector, and relates to the field of lenses, the lens comprises an aluminum alloy frame, the bottom of the inner cavity of the aluminum alloy frame is provided with an optical substrate layer, the outer wall of the optical substrate layer is provided with a micro-groove, and the inner cavity of the micro-groove is internally provided with a shape memory alloy micro-spring array. The top of the optical substrate layer is provided with an infrared reflection metamaterial layer, and the top of the infrared reflection metamaterial layer is provided with an anti-reflection layer. According to the lens for the projector, by means of the lens composed of the optical substrate layer, the infrared reflection metamaterial layer, the anti-reflection layer and the shape memory alloy micro-spring array, the heat dissipation requirement during use of the lens can be guaranteed, heat generated by a high-power light source can be rapidly conducted out, and the lens has good optical stability and is suitable for being used for a projector. According to the invention, focal length drift and imaging blurring caused by thermal expansion can be avoided, light source bearing and heat conduction effects can be achieved through the optical substrate layer, and a directional heat conduction effect can be achieved in cooperation with the micro grooves.

This application discloses a radiation-resistant glass, a chemically strengthened glass, and their preparation methods and applications, belonging to the field of glass material technology. The radiation-resistant glass, based on the mass percentage of oxides, comprises: SiO2: 64.0~72.0%, Al2O3: 1.0~7.0%, MgO: 1.0~2.0%, ZnO: 2.0~5.0%, Na2O: 5.0~9.0%, K2O: 3.0~5.5%, CaO: 0.1~2.0%, B2O3: 0~6.0%, TiO2: 0~3.0%, CeO2: 2.0~6.0%, Sb2O3: 0.01~2.0%; and satisfies: 1.5≤(B2O3+Na2O) / (Al2O3+ZrO2)≤5; 1.70≤Na2O / K2O≤1.80; 0≤TiO2 / CeO2≤1.0. This application enables the glass to possess excellent radiation resistance and optical stability, low coefficient of thermal expansion, high strength and safe breakage characteristics by adjusting the basic components and proportions. It can be used in applications that require ultraviolet cutoff and resistance to high-energy radiation, such as in solar modules, as a cover plate for solar modules in aerospace or outer space environments.

The invention provides cathodoluminescent lamps with improved optical stability and extended lifetimes through advanced enclosure and electron emission configurations. A filament emits electrons via thermionic emission, which are accelerated by an anode toward a cathodoluminescent emitter to produce photons. The vacuum enclosure comprises glass, fused silica, and metal portions coupled with vacuum-compatible epoxy, with the metal providing thermal and electrical conduction. The lamp can include anode current monitoring and filament power control to stabilize emission. An electrically activated getter maintains vacuum conditions by chemically bonding contaminants and can be refreshed over time. The designs enable effective vacuum maintenance, stable operation, and long-term reliability suitable for commercial applications.

The invention relates to the technical field of functional polymer composite materials, in particular to a polyvinyl butyral composite material as well as a preparation method and application thereof. According to the polyvinyl butyral composite material provided by the invention, the initial dispersity of the ITO nanoparticles is excellent, polymer yellowing and degradation caused by photocatalysis of the ITO nanoparticles can be remarkably inhibited, and the polyvinyl butyral composite material is excellent in optical stability and durability in the long-term use process. According to the polyvinyl butyral composite material provided by the invention, the indium tin oxide nanoparticles are high in dispersion and light aging resistance, so that the polyvinyl butyral composite material is endowed with excellent anti-yellowing performance and efficient near-infrared shielding performance and can be used for laminated glass, for example, the polyvinyl butyral composite material is used as an interlayer of the laminated glass, the application problem of the ITO nanoparticles is solved, and the performance of the laminated glass is improved.

The invention discloses a high-temperature-resistant non-metal sleeve insulation optical fiber unit, and relates to the technical field of special optical cable manufacturing. The cable comprises a cable body, the cable body comprises a fiber core, a buffer layer, an insulating layer and a sheath, and the fiber core, the buffer layer, the insulating layer and the sheath are sequentially distributed from inside to outside; the high-temperature-resistant optical fiber has an all-nonmetal insulation structure, can fundamentally avoid the problems of electromagnetic induction and electrochemical corrosion, is free of electromagnetic interference, prolongs the design life, has excellent high-temperature-resistant performance, and ensures that the optical fiber unit continuously works for a long time in a high-temperature environment through the composite design of multiple layers of high-temperature-resistant materials of the fiber core, the buffer layer, the insulation layer and the sheath; the optical fiber has the advantages of simple structure, stable and reliable performance, light weight and convenience in installation, can effectively buffer thermal stress of different materials at high temperature, ensures long-term mechanical strength and optical stability of the optical fiber at high temperature, and has high safety and reliability.

The present disclosure relates to a liquid crystal compound, a preparation method therefor, and a use thereof. The liquid crystal compound provided by the present disclosure has relatively large negative dielectric anisotropy and the characteristics of high clearing point, relatively high optical anisotropy, moderate rotational viscosity, and liquid crystal miscibility, exhibits excellent low-temperature working effect, and shows good properties such as thermal stability, chemical stability, optical stability, and mechanical properties. Therefore, the driving voltage of a liquid crystal display device in which the liquid crystal compound is used can be effectively reduced, the response speed of the liquid crystal display device is increased, and the liquid crystal display device has the characteristics of moderate optical anisotropy numerical value, high charge retention rate, etc.

The invention discloses a high-strength low-melting-point glass binder and application thereof in photovoltaic glass. According to the binder, Bi2O3-B2O3-ZnO is used as a main body system, and SiO2, Al2O3, CeO2, ZrO2 and other components are introduced, so that the glass network stability and the interface bonding strength are remarkably improved while the low softening temperature is kept. When being used for a reflective coating of photovoltaic backboard glass, the coating can form a compact coating under a low-temperature sintering condition, and has excellent damp-heat durability and optical stability.

The present invention discloses a backlight module, which includes a back plate, a light guide plate, an optical film group and a positioning and resilient structure. The light guide plate is disposed on the back plate, and a first space and a second space are respectively reserved between opposite two wall portions of the back plate and opposite two side surfaces of the light guide plate. The optical film group is disposed on the light guide plate and extends into the first space, and a limiting groove is formed on the extending end. The positioning and resilient structure includes a first elastic piece and a second elastic piece. The first elastic piece includes a first deformation portion, a first chamfer portion and a first positioning portion which are sequentially connected. The second elastic piece includes a second deformation portion, a second chamfer portion and a second positioning portion which are sequentially connected. The first elastic piece and the second elastic piece are respectively disposed in the first space and the second space. The first deformation portion faces one side surface of the light guide plate and is inserted into the limiting groove, and the second deformation portion faces the other side surface of the light guide plate. This backlight module has better optical stability.

The application discloses an environmentally-friendly chalcogenide glass material with excellent acousto-optic characteristics and application thereof. The chemical composition of the chalcogenide glass material is Ga x Sn y Se 100‑x‑y‑z Te z , wherein x, y and z are molar fractions of Ga, Sn and Te respectively, x = 5-10, y = 15-20, and z = 3-7. The chalcogenide glass material contains stable [GaTe n Se 4‑n ] and [SnTe n Se 4‑n ] tetrahedral structures in the micro-network structure. The value of n is 0, 1, 2, 3 or 4. The chalcogenide glass material can be applied to the acousto-optic field as an acousto-optic medium. The chalcogenide glass material has excellent comprehensive performance, remarkable environmental-friendly characteristics, low cost advantage, good mechanical processing performance and optical stability in a variable temperature environment, and provides an ideal material for low-cost and large-scale manufacturing of high-performance acousto-optic devices such as acousto-optic modulators and deflectors.

The application discloses an oxygen-enriched recombinant human I / V type collagen corneal repair gel and a preparation method thereof. Methyl methacrylic acid is added into recombinant human I / V type collagen to prepare a methyl methacrylate anhydride recombinant human collagen RHC-I / V-MA solution, the solution is dissolved in an EDC solution for reaction for 2-4 hours to obtain a RHC-I / V-MA-EDC sponge-like solid sample, then the sample is dissolved in a photoinitiator to obtain a mixed solution, an oxygen-containing gas is continuously introduced into the mixed solution by using a micro-nano bubble generator, the flow rate of the oxygen-containing gas is 0.1-2 L / min, and the oxygen-containing gas is introduced for 1-15 minutes to obtain the oxygen-enriched recombinant human I / V type collagen corneal repair gel. The light transmittance of the oxygen-enriched recombinant human I / V type collagen corneal repair gel is extremely high in a spectral range of 400-700 nm, the oxygen-enriched recombinant human I / V type collagen corneal repair gel has good optical stability, is suitable for repairing a corneal transparent layer and provides a material selection with excellent optical performance for corneal repair.

The invention discloses a halogen anion substituted rare earth fluoride nano scintillator for improving X-ray excitation luminescence intensity and afterglow intensity and a preparation method and application thereof, and belongs to the technical field of biological nano materials. The chemical formula of the nano scintillator is NaAF (4-n) Xn: m% Tb, A represents Y, Er, Gd, Lu or Yb, X represents Cl, Br or I, n is larger than or equal to 0.1 and smaller than or equal to 1.6, and m is larger than or equal to 5 and smaller than or equal to 20. Part of F <-> ions are replaced by halogen anions (Cl <->, Br <-> and I <->), and the X-ray excitation luminescence intensity and afterglow intensity can be remarkably improved. A transmission electron microscope (TEM) shows that the prepared nanoparticles are spherically distributed in morphology, uniform in size and good in dispersity, and the particle size is intensively distributed at 25nm. After continuous six times of cyclic irradiation by X-rays (80kV, 0.7 mA), long-term optical stability can still be maintained.

The invention relates to a one-dimensional pyrenyl organic framework nonlinear optical material as well as preparation and application thereof. The material is prepared from a pyrenyl amino monomer (Py) and different dialdehyde monomers (PTDE, PTBE and PDA) through direct Schiff base condensation reaction under a solvothermal condition, a series of one-dimensional linear organic framework material (COF) chain segments are constructed, and a thin film material is further prepared. The obtained material has highly ordered crystallinity, an expanded pi-conjugated skeleton and an obvious donor-acceptor (D-A) charge transfer channel. The one-dimensional pyrenyl D-A COF (Py-PTDE, Py-PTBE and Py-PDA) has the advantages that the one-dimensional pyrenyl D-A COF (Py-PTDE, Py-PTBE and Py-PDA) has the obvious RSA (Reverse Saturated Absorption) effect under the excitation of femtosecond laser (800 nm and 1550 nm) for the first time; compared with the prior art, in particular to a Py-PTDE material, the effective nonlinear absorption coefficient (beta eff) of the Py-PTDE material reaches 116.89 cm. GW <-1 > and 337.03 cm. GW <-1 > at 800 nm and 1550 nm respectively, so that the Py-PTDE material is obviously superior to a precursor material and another two COF materials, and shows a lower optical limiting threshold value at a near-infrared band. The excellent performance is mainly derived from more effective D-A interaction, narrower optical band gap and more efficient intramolecular charge transfer channel in the material. The material disclosed by the invention is simple in preparation method and high in repeatability, and the obtained COF film has excellent thermal stability and optical stability, can be directly used for preparing optical limiting devices and ultrafast optical response devices and can be applied to other three-order nonlinear optical fields.

The invention discloses an adhesive for a polaroid. The adhesive comprises the following components in parts by mass: 100 parts of an acrylate copolymer, 2-30 parts of an isocyanate compound, 1-10 parts of a metal chelate, 1-10 parts of an epoxy compound and 50-500 parts of a solvent, the acrylate copolymer is synthesized by copolymerizing the following raw materials in percentage: 60 to 80 percent of acrylate monomer, 10 to 30 percent of carboxylic acid vinyl ester monomer and 5 to 10 percent of acrylate containing carboxyl. The adhesive for the polaroid has high light transmittance and high cohesive force, can show good yellowing resistance under illumination and oxidation conditions, and can still keep good adhesive performance and optical stability in a high-temperature and high-humidity environment.

The invention discloses a compact shear speckle interference system, which is suitable for detection scenes with large view field and small view field in narrow space, and a replaceable front lens is arranged between an object to be detected and an interference imaging optical system and comprises a wide-angle lens, a standard lens, a micro-focus lens, an endoscopic lens and the like; the interference imaging optical system comprises a beam splitter prism, double interference arms and hyperboloid reflectors, and the two hyperboloid reflectors are tightly attached to the beam splitter prism; diffuse reflection speckle light of an object to be measured is divided into transmission light beams and reflection light beams by the beam splitter prism, the transmission light beams and the reflection light beams are transmitted through the double interference arms, reflected and focused through the curved reflector and then return along the same path, and interference fringe patterns carrying object deformation information are formed through beam combination interference. The PZT assembly drives the single curved-surface reflector to perform nanoscale micro-movement along the optical axis to realize phase modulation, and the two-dimensional precision displacement table drives the curved-surface reflector to perform micro-movement perpendicular to the optical axis to regulate and control the imaging shear amount. The optical system is compact in structure, excellent in dynamic response, flexible and adjustable in view field and high in optical stability.

The invention relates to the technical field of optical microscope imaging, and discloses an optical stability evaluation and prediction method based on an improved LSTM model, and the method comprises the steps: obtaining the imaging data, environment sensor data and operation state data of a to-be-tested optical microscope, and carrying out the multi-source data fusion analysis through the improved LSTM model, and obtaining the optical stability of the to-be-tested optical microscope. And accurate evaluation of the imaging stability is realized. According to the method, the improved LSTM model is utilized to accurately identify the root cause of imaging instability, and the accuracy and reliability of an evaluation result are remarkably improved; a dynamic weight adjustment strategy and a real-time data processing technology are adopted, so that the model can quickly respond to environment change and equipment state fluctuation, efficient prediction of imaging stability is realized, and the problem of poor real-time performance of a traditional method is solved; and in combination with real-time evaluation and prediction results, an intelligent early warning function is also provided to help researchers to find and solve the problem of instability in the imaging process in advance, so that the imaging quality is effectively prevented from being reduced, and the experimental uncertainty is reduced.

A diffractive optic reflex sight (DORS) is provided for aiming devices in which a virtual image, such as a reticle, is produced and appears in the distance of a user's view when looking through the reflex sight. A light source illuminates a diffractive optical element (DOE) that includes a modulation pattern that generates a patterned illuminations corresponding with the virtual image. A reflective image combiner then reflects the patterned illumination so that the virtual image appears in the distance of the viewer's view. The DORS optical design system is mechanically and optically stable for precision aiming across a range of environmental conditions and in different use scenarios or applications including use in rapidly changing temperatures, varying light conditions, and a wide range of user proficiencies. The DORS optical design system is a readily manufacturable aiming and sighting device for a wide range of applications from handguns to astronomical telescopes.

The present inventive concept relates to a hybrid wavelength converter including both a metal halide perovskite nanocrystal particles and non-perovskite-based quantum dots or non-perovskite-based phosphors converting a wavelength of light generated from an excitation light source to specific wavelengths, and a light-emitting device including the same. By including metal halide perovskite nanocrystal particles and non-perovskite quantum dots or non-perovskite phosphors in the dispersion medium, the hybrid wavelength converter according to the present inventive concept enables to make simultaneous wavelength conversion to red and green light, and to be optically stable and improved color purity and luminescence performance without changing the emission wavelength range even with a lower cadmium content than the conventional quantum dot wavelength converter.

The application provides a cement-based aerogel material with intrinsic anti-aging ability and stable optical performance and a preparation method thereof, anti-aging functional groups are chemically bonded to the cement-based aerogel network through in-situ copolymerization, the pore structure and optical performance are optimized, and the synergistic improvement of anti-aging performance and optical stability is realized. The raw materials of the cement-based aerogel material include a matrix material and a functional monomer, the matrix material is composed of silicate cement and silica sol, wherein the cement accounts for 50-70wt%, and the silica sol accounts for 30-50wt%; the functional monomer includes ultraviolet absorbing monomer A, antioxidant monomer B and hydrophobic monomer C, and the total amount of the functional monomer ranges from 1wt% to 8wt%. The cement-based aerogel material obtained in the application has excellent physical performance (such as optical performance), greatly promotes the important application value and application potential of the material in the fields of optoelectronic devices, gas-sensitive sensors, space high-speed particle capture and electrochemical energy storage devices, thermal insulation and the like.