82results about How to "Excellent optical properties" patented technology

According to the photopolymer system based on the fluorine-containing liquid crystal, the grating device and the preparation method of the grating device, the mixed liquid crystal containing the nematic liquid crystal and the fluorine-containing liquid crystal at the same time is adopted in the photopolymer system, and therefore the polarity and dielectric anisotropy of the mixed liquid crystal material are improved; the overall electro-optical performance, uniformity and stability of the photopolymer system are improved, so that a grating device prepared based on the photopolymer system has good optical characteristics of low haze while having relatively high diffraction efficiency. Specifically, fluorine-containing biphenyl liquid crystals, fluorine-containing alkyne liquid crystals and fluorine-containing difluoromethoxy liquid crystals of which the carbon atoms of flexible side chains are 2-5, and nematic liquid crystals of which the delta epsilon is not less than 10 are selected to jointly form mixed liquid crystals; and the balance and optimization between the diffraction efficiency and haze performance of the photopolymer system and the grating device prepared from the photopolymer system are realized.

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens which is composed of a first lens, a second lens, a third lens, a fourth lens and a prism which are sequentially arranged from the object side to the image side. The focal length and the total optical length of the shooting optical lens are f and TTL respectively, the focal length of the first lens is f1, the combined focal length of the front two lenses is f12, the combined focal length of the rear three lenses is f234, the central curvature radiuses of the object side surface and the image side surface of the first lens are R1 and R2 respectively, the axial thicknesses of the first lens and the third lens are d1 and d5 respectively, and the central curvature radiuses of the object side surface and the image side surface of the third lens are R1 and R2 respectively. The axial distance from the object side surface of the first lens to the image side surface of the fourth lens is Td, and the following relational expression is satisfied: f1 / f is greater than or equal to 0.30 and less than or equal to 0.70; -1.40 < = f12 / f234 < =-0.04; -3.00 < = R1 / R2 < =-1.00; 0.16 < = Td / TTL < = 0.21; and 0.05 < = d5 / ET3 < = 0.66.

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens, which comprises five lenses, the five lenses are sequentially a first lens with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power and a fifth lens with negative refractive power from the object side to the image side; wherein the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the curvature radius of the object side surface of the first lens is R1, the curvature radius of the image side surface of the first lens is R2, the curvature radius of the object side surface of the third lens is R5, and the curvature radius of the image side surface of the third lens is R6, the following relational expressions are satisfied:-1.00 < = f3 / (R5 + R6) < =-0.30; -0.65 < = (R1 + R2) / (R1-R2) < =-0.25; f1 / f2 is greater than or equal to-8.00 and less than or equal to-4.00.

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens which comprises a first lens with positive refraction power, a second lens with negative refraction power, a third lens with negative refraction power and a triangular prism with negative refraction power which are sequentially arranged from the object side to the image side. Wherein the axial distance from the object side surface of the first lens to the image side surface of the third lens is D, the optical total length of the camera shooting optical lens is TTL, the Abbe number of a glass lens of the camera shooting optical lens is vdi, the focal length of the camera shooting optical lens is f, the focal length of the first lens is f1, the axial thickness of the second lens is d3, and the axial thickness of the third lens is d5; the axial distance from the image side surface of the second lens to the object side surface of the third lens is d4, the combined focal length of the second lens and the third lens is f23, the curvature radius of the object side surface of the third lens is R5, the curvature radius of the image side surface of the third lens is R6, and the following relational expression is satisfied: 0.14 < = D / TTL < = 0.46; 40.00 < = vdi < = 82.00; 0.30 < = f1 / f < = 0.70; -32.08 < = f23 / (D3 + D4 + D5) < =-3.00; 1.40 < = (R5 + R6) / (R5-R6) < = 20.00.

The invention relates to the technical field of polarizing beam splitters, in particular to a polarizing beam splitter and a preparation method and application thereof. The polarizing beam splitter provided by the invention comprises a diamond substrate, a polarizing beam splitting film and a first metalized film layer which are positioned on the surface of one side of the diamond substrate, a broadband antireflection film positioned on the surface of the other side of the diamond substrate, and a second metalized film layer positioned on the side surface of the diamond substrate, the first metallized film layer is located at the edge position of the surface of one side of the diamond substrate. Diamond is adopted as a substrate material of the polarizing beam splitter, and the characteristic of high thermal conductivity of the diamond is utilized, so that heat generated when laser acts on a film layer and a substrate can be quickly conducted as soon as possible, and damage to the polarizing beam splitter caused by local temperature rise is relieved; the edge of the polarizing beam splitter is metalized, so that the beam splitter body and a metal tube shell or a water cooling structure can be integrally welded, and a high-reliability and low-leakage-rate vacuum sealing solution can be provided while the heat conduction efficiency is improved.

The invention belongs to the technical field of perovskite batteries, and particularly relates to a perovskite precursor and a preparation method thereof. According to the invention, the perovskite precursor is prepared into an emulsion form, Ge < 4 + > is adopted to prepare the perovskite precursor, and the silicon dioxide nano oxide, the additive and the stabilizer are introduced into the emulsion precursor, so that the moisture resistance and hydrophobicity of the perovskite thin film are improved, and tiny liquid drops in the emulsion are used as a template for perovskite crystal growth, so that the perovskite thin film is prepared. The size and form of perovskite crystals are controlled, the silicon dioxide nano oxide can passivate defect states on the surface of perovskite and reduce recombination of electron-hole pairs, and a precursor in the emulsion is also beneficial to passivating surface defects in the curing process, reducing defect state density and improving device performance. The device prepared by using the perovskite precursor prepared by the invention has good photoelectric property and stability.

The application relates to the field of optical lenses and discloses a camera optical lens which comprises seven lenses in sequence from the object side to the image side, namely a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, a sixth lens with positive refractive power and a seventh lens with negative refractive power; wherein the focal length of the camera optical lens is f, the focal length of the first lens is f1, the central curvature radius of the object side surface of the third lens is R5, the central curvature radius of the image side surface of the third lens is R6, the on-axis thickness of the second lens is d3, the on-axis distance from the image side surface of the second lens to the object side surface of the third lens is d4, and the following relationships are satisfied: 1.00 <= f1 / f <= 2.00; 2.00 <= d3 / d4 <= 5.00; and -10.00 <= R5 / R6 <= -1.00. The camera optical lens has good optical performance and meets the design requirements of large aperture, wide angle and ultra-thin.

A rare earth organic tetrahedral molecular cage complex and a preparation method and application thereof are constructed with rare earth europium (III) as the vertex, triphenylamine-derived tripodal β-diketone as the face-directing ligand and 1,10-phenanthroline as the auxiliary ligand. The complex is modified by Pluronic F127 to obtain a composite material containing a rare earth organic tetrahedral molecular cage complex structure, and the application of the composite material as an inner ear drug carrier delivery system in the treatment of inner ear diseases. The complex of the present invention provides a cavity with a suitable capacity for accommodating guest molecules, and has high light efficiency to facilitate the tracing of drug carriers, and can efficiently penetrate the cochlear blood-membrane labyrinth barrier to enter the endolymph, and then be taken up by inner ear sensory cells. The Pluronic F127-modified rare earth cage complex synthesized by the present invention can be used as a safe and efficient inner ear drug delivery carrier, with great clinical value and application prospects.

The application provides a saturable absorption device, a preparation method and a low-threshold starting pulse mode-locked laser, and relates to the technical field of lasers. The application discloses a method for preparing a high-quality bismuth copper selenium oxide single crystal by a chemical vapor transport method, and a saturable absorption device prepared by simply using the high-quality bismuth copper selenium oxide single crystal can be applied to a pulse mode-locked laser, and can generate super-short pulse laser output, has high stability and a high signal-to-noise ratio, and has a low starting threshold.

This invention relates to the field of optical lenses and discloses a camera optical lens comprising seven lenses arranged sequentially from the object side to the image side: a first lens with negative refractive power, a second lens with positive refractive power, a third lens with positive refractive power, a fourth lens with negative refractive power, a fifth lens with positive refractive power, a sixth lens with negative refractive power, and a seventh lens with negative refractive power. The fifth lens is made of glass. The Abbe number of the fifth lens is v5, and the central curvature of the object side of the first lens is half... The diameter is R1, the central radius of curvature of the image side of the first lens is R2, the axial thickness of the first lens is d1, the radian value of the field of view of the camera optical lens is FOV (rad), the image height of the 1.0 field of view of the camera optical lens is IH, and the aperture value of the camera optical lens is FNO, and the following relationships are satisfied: 60.00≤v5≤82.00; -16.00≤(R1+R2) / d1≤-8.00; 6.00≤(FOV(rad)IH) / FNO≤7.30.

This invention belongs to the field of back-contact battery technology, specifically relating to a back-contact battery and its battery assembly with a specific front-side structure. This specific front-side structure includes a tunneling oxide layer and a specifically doped amorphous silicon layer sequentially disposed on the front side of a silicon substrate. Within the specifically doped amorphous silicon layer, a low-doped amorphous silicon layer, a high-doped amorphous silicon layer, and an oxygen-doped amorphous silicon layer are sequentially disposed along the direction away from the tunneling oxide layer. The specifically doped amorphous silicon layer is doped with phosphorus (P) and contains hydrogen (H). The P doping concentration C1 in the low-doped amorphous silicon layer and the P doping concentration C3 in the oxygen-doped amorphous silicon layer are both lower than the P doping concentration C2 in the high-doped amorphous silicon layer. This specific front-side structure enables the back-contact battery to achieve an absorption rate exceeding 85% for incident light within 400 nm. The back-contact battery of this invention maintains good performance even after long-term exposure to ultraviolet light, improving the battery's UV reliability while achieving high transmittance and high battery efficiency.

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens which comprises seven lenses which are sequentially a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side. The center curvature radius of the object side face of the third lens is R5, the center curvature radius of the image side face of the third lens is R6, the center curvature radius of the object side face of the fifth lens is R9, the center curvature radius of the image side face of the fifth lens is R10, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the sixth lens is f6, and the focal length of the seventh lens is f7. The axial distance from the image side surface of the first lens to the object side surface of the second lens is d2, the axial distance from the image side surface of the sixth lens to the object side surface of the seventh lens is d12, the Abbe number of the first lens is v1, the Abbe number of the second lens is v2, and the following relational expressions are met: 1.10 < = R9 / R10 < = 1.90; 1.50 < = (R5 + R6) / (R5-R6) < = 2.80; (f6-f7) / d12 is greater than or equal to 17.00 and less than or equal to 20.00; 0.17 < = (v1-v2) * d2 / (f1-f2) < = 0.32.

The application discloses a heterojunction solar cell and a preparation method thereof. The method comprises the following steps: forming a first microcrystalline silicon layer on one side of a light-receiving surface of a silicon substrate; forming a second microcrystalline silicon layer on the first microcrystalline silicon layer; and forming a third microcrystalline silicon layer on the second microcrystalline silicon layer; the deposition rates of the first microcrystalline silicon layer, the second microcrystalline silicon layer and the third microcrystalline silicon layer are respectively v1, v2 and v3; wherein v2 is less than v1, and v2 is less than v3. By arranging three microcrystalline silicon layers on the light-receiving surface of the silicon substrate and adjusting the relationship of the deposition rates of the three microcrystalline silicon layers during preparation, the optical property of the light-receiving surface of the silicon substrate can be improved, the parasitic absorption of the film layers to ultraviolet light during the working of the heterojunction solar cell is fundamentally prevented, and the performance of the solar cell after illumination is greatly reduced.

A keyboard is described, having a total recycled and renewable content of equal to or greater than 35% by weight, based on the total weight of the keyboard. The keyboard comprises: a keycap comprising a mechanically recycled polycarbonate polymer or a chemically recycled cellulose-based polymer; a pair of cross arms forming a scissor-like structure comprising a polymer composition comprising 60% to 100% by weight of a polyoxymethylene polymer and 0% to 40% by weight of a filler comprising glass; and a backlight module comprising a polycarbonate polymer from a renewable source or a chemically recycled polyester polymer.

Provided are a semiconductor nanoparticle, a method of manufacturing the same, and a composite, a color conversion structure, and an electronic device including the same. The semiconductor nanoparticles include silver, indium, gallium, and sulfur, in which the semiconductor nanoparticles are configured to emit green light, and in which the semiconductor nanoparticles have a relative molar value of zinc of greater than or equal to about 0.25 and less than or equal to about 0.9 as defined by Equation 1: Relative molar value of zinc of Equation 1 = [Zn] / ([Ag] + [In] + [Ga] + [Zn]), in Equation 1, in Equation 1, in Equation 1, in Equation 2, in Equation 3, in Equation 4, in Equation 5, in Equation 6, in Equation 6, in Equation 6, in Equation 7, in Equation 6, in Equation 7, in Equation 6, in Equation 7, in [Ag], [In], [Ga], and [Zn] are molar amounts of silver, indium, gallium, and zinc in the semiconductor nanoparticles, respectively, and wherein the molar ratio of gallium to indium is greater than about 2.5: 1 and less than about 5.6: 1.

The present invention provides a polarizing film having excellent optical characteristics and excellent durability even in harsh heating environments. Also provided are: a polarizing plate using such a polarizing film; and an in-vehicle image display device using such a polarizing plate. This polarizing film is composed of a polyvinyl alcohol-based resin film having a thickness of 8 [mu] m or less, the polyvinyl alcohol-based resin film containing iodine and potassium, the iodine concentration being 5.0 wt% or more, and the molar ratio (I / K) of the iodine concentration to the potassium concentration being 2.5 or less.

The present invention relates to the field of optical fiber technology, and further to a wide-wavelength optical fiber array based on thin-film lithium niobate optical fiber. It comprises: a substrate, a dispersion compensator, an optical coupler and an optical fiber array; a lithium niobate thin film formed by lithium niobate deposition is disposed on the substrate; a waveguide structure is formed on the lithium niobate thin film by photolithography and etching; the optical fiber array comprises a plurality of optical fibers; the optical coupler is used to couple the optical signal in the waveguide structure to the optical fiber array or to couple the optical signal in the optical fiber array to the waveguide structure; the dispersion compensator is used to perform dispersion compensation on all optical fibers in the optical fiber array. The present invention solves many problems in the prior art, such as insufficient dispersion compensation, signal distortion and signal loss caused by nonlinear effects, etc.

This invention provides an organic eutectic material with a controllable charge-transfer exciton diffusion coefficient and its preparation method. The molecular formula of this organic eutectic material is (TSB). x (TSB-Br) 1‑x (TCNB)2, wherein TSB is trans-1,2-stilbene, TSB-Br is trans-4-bromostilbene, TCNB is 1,2,4,5-phenylenetetraacetonitrile, and x is the proportion of TSB molecules. The organic eutectic material prepared by this invention has a regular morphology, high crystallinity, and exhibits both strong and delayed fluorescence emission, with continuously tunable diffusion coefficients for singlet and triplet charge-transfer excitons. The preparation method described in this invention has advantages such as low raw material cost, mild conditions, and simple operation. The prepared (TSB)2... x (TSB-Br) 1‑x (TCNB)2 organic eutectic materials have potential applications in fields such as imaging, photoelectric conversion, and spintronics.

The present application provides a polarizing plate having excellent optical properties and suppressing deviation of the optical properties. The polarizing plate of the present application has a polarizing film having a thickness of 8 μm or less, a monochromatic transmittance of 48% or more, and a degree of polarization of 85% or more, and a protective layer provided on at least one side of the polarizing film, wherein the difference between the maximum and minimum values of the monochromatic transmittance of the polarizing plate in a region of 50 cm 2 width is 1% or less. Another polarizing plate of the present application has a polarizing film having a thickness of 8 μm or less, a monochromatic transmittance of 48% or more, and a degree of polarization of 85% or more, and a protective layer provided on at least one side of the polarizing film, wherein the width of the polarizing plate is 1000 mm or more, and the difference between the maximum and minimum values of the monochromatic transmittance of the polarizing plate at positions in the width direction is 1% or less.

The present application relates to the field of optical lens, provide a kind of zoom lens, the zoom lens is sequentially by the first lens with negative refractive power, the second lens group with positive refractive power, the fifth lens with positive refractive power and the sixth lens with negative refractive power from object side to image side, in zooming, the first lens, the second lens group, the fifth lens and the sixth lens, the interval of adjacent lens or lens group in the direction of optical axis changes, the second lens group is composed of the second lens with positive refractive power, the third lens with negative refractive power and the fourth lens with negative refractive power, and satisfy the following relationship: 1.80≤f_Tele / f_Wide≤2.044;-1.75≤f3 / f2≤-1.35;-1.75≤f4 / f2≤-1.35.The present application becomes small in contraction, in photography, FNO is bright, and has good optical characteristics.

An optical system disclosed in an embodiment of the present invention includes first to eighth lenses disposed along an optical axis in a direction from an object side to a sensor side, wherein: the first lens has a positive (+) refractive power on the optical axis and has a meniscus shape protruding toward the object side; an eighth lens having negative (-) refractive power on the optical axis and having a meniscus shape protruding toward the object side; an object-side surface of the seventh lens has a critical point; a sensor-side surface of the third lens has a critical point, and a sensor-side surface of the eighth lens has a critical point, and when an effective diameter of a sensor-side surface of the third lens is CAL3S2, an effective diameter of an object-side surface of the fourth lens is CAL4S1, a maximum thickness among center thicknesses of the first to eighth lenses is CTMax, a maximum gap among gaps between the first to eighth lenses is CGMax, and the effective diameter of the sensor-side surface of the third lens is CAL3S2. The following mathematical relationship is satisfied: 0.5 lt; cAL3S2 / CAL4S1lt, and CAL4S1lt; 1.5 and 0 lt; cTMaxt / CGMaxt, and CTMaxt / 1.

Examples relate to thin films, transparent laminates, applications as cover films, and multilayer electronic devices incorporating the thin film, which possess excellent optical properties such as refractive index, haze, and yellowness, as well as excellent mechanical properties. The thin film includes an elastic layer with a refractive index of 1.48 to 1.58 and a low-temperature damage index (the difference between tensile modulus and tensile strength at a specific temperature), wherein the low-temperature damage index of the elastic layer at -40°C is below 1300 MPa.

The invention relates to an AIE material for marking rabies virus as well as a preparation method and application of the AIE material, and belongs to the technical field of intracellular visualization after virus infection and virus infection mechanism research. In order to obtain an AIE material capable of being used for marking rabies virus and further realize real-time visual tracking after virus infection, an alkynyl group is artificially introduced on the AIE material TPE-BP-cho through a chemical synthesis method, so that the AIE material has the capability of carrying out click reaction with amino groups. The RABV can be simply and quickly marked by using the modified AIE material, and the marked RABV not only has excellent properties of the AIE material, but also has good infection ability; and in combination with a confocal microscope, real-time tracking can be carried out in living cells after virus infection is marked, RABV intracellular transport activity can be analyzed through statistical algorithm analysis, and a good tool is provided for virus pathogenic mechanism research and antiviral drug screening.

An optical system according to an embodiment of the present invention includes first to seventh lenses aligned along an optical axis from an object side toward a sensor side, in which: a refractive power of the first lens is negative; the combined refractive power of the third to seventh lenses is positive; the first lens has a meniscus shape protruding from the optical axis toward the sensor side. A center thickness of the first lens is greater than a center thickness of each of the second to seventh lenses; the first to seventh lenses include a plurality of aspheric lenses. And each of the plurality of aspheric lenses may have a meniscus shape protruding from the optical axis toward the object side.

The present invention provides a UV-curable protective material composition having excellent flame retardancy and an LED display using the same, and more particularly, to a UV-curable protective material composition including an oligomer having at least one skeleton selected from among polyisobutylene and hydrogenated polybutadiene and having a bifunctional acrylic group; an acrylic monomer; a photoinitiator; and a solid flame retardant including phosphorus, in which the solid flame retardant has a D90 particle size of 2 [mu] m to 20 [mu] m, and the content of the phosphorus is 10 wt% or more based on the total weight of the solid flame retardant. The UV-curable protective material composition exhibits excellent flame retardancy, optical properties, and durability, and is suitable for use in LED displays and the like.

An optical system disclosed in an embodiment of the present invention may include first to eighth lenses disposed along an optical axis from an object side to a sensor side, in which an object-side surface of the first lens is convex, and at least one of an object-side surface and a sensor-side surface of the seventh lens has at least one critical point, at least one of an object-side surface and a sensor-side surface of the eighth lens has a free-form surface shape in which lens surfaces in a first direction and a second direction orthogonal to each other with respect to the optical axis are asymmetrical, and in a free-form surface, lens surfaces in the first direction and the second direction are asymmetrical. The opposing lens surface has a symmetrical shape in a first direction with respect to the optical axis, and the opposing lens surface has a symmetrical shape in a second direction with respect to the optical axis.

This invention belongs to the field of optoelectronic material preparation technology, specifically relating to a Mg-doped C12A7 translucent ceramic and its preparation method. The method includes the following steps: mixing a calcium-containing precursor, an aluminum-containing precursor, and a magnesium-containing precursor in a specific molar ratio; ball milling the mixture in anhydrous ethanol; drying and sieving to obtain (Ca... 1‑x Mg x )12A7 precursor powder; the (Ca 1‑x Mg x )12A7 precursor powder was pressed and subjected to cold isostatic pressing to obtain (Ca 1‑x Mg x )12A7 precursor block; the (Ca 1‑x Mg x The Mg-doped C12A7 precursor block is placed in an oxygen atmosphere and heated to the target sintering temperature for pressureless sintering to obtain Mg-doped C12A7 ceramic. This invention significantly simplifies the process flow, reduces the complexity and cost of preparation, and effectively achieves high densification of the ceramic.

This invention provides a chemically strengthened glass-ceramic and its preparation. The chemically strengthened glass-ceramic includes a glass-ceramic substrate and a compressive stress layer formed on the surface of the substrate through ion exchange chemical strengthening. The glass-ceramic substrate comprises crystal family 1 and crystal family 2. Crystal family 1 includes crystals having the following structural formula: (Zn x Mg 1‑x‑y Al 2‑2y (Al) 2y Mg y O4, wherein: 0≤x≤1; 0≤y≤1; and 0≤x+y≤1; the crystal group 2 includes zirconium oxide; the compressive stress layer has a CTLD_saf value of 15000~70000 MPa. Compared with the existing LAS microcrystalline glass system, the chemically strengthened microcrystalline glass of the present invention not only has excellent mechanical properties and impact resistance, but also significantly reduces the overall cost.

The present invention provides quantum dots, quantum dot dispersions containing the same, curable compositions, cured films and image display devices. The quantum dots of the present invention have a ligand layer on the surface, and the ligand layer contains a combination of organic ligands of a specific structure, thereby not only exhibiting excellent optical properties, dispersibility, adhesion and coating hardness, but also being able to suppress outgassing. Thus, the quantum dots can be effectively used in a variety of quantum dot application fields such as color filters and light conversion sheets to achieve image display devices with excellent reliability.