237results about How to "Excellent optical properties" patented technology

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens which sequentially comprises a first lens with negative refraction power, a second lens with negative refraction power, a third lens with positive refraction power, a fourth lens with positive refraction power, a fifth lens with negative refraction power and a sixth lens with negative refraction power from an object side to an image side. A fifth lens element with positive refractive power; and a sixth lens element with negative refractive power. Wherein the on-axis distance from the image side surface of the first lens to the object side surface of the second lens is d2, the optical total length of the camera shooting optical lens is TTL, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the center curvature radius of the object side surface of the fourth lens is R7, the center curvature radius of the image side surface of the fourth lens is R8, the following relational expression is satisfied: 0.10 < = d2 / TTL < = 0.20; 0.60 < = f3 / f4 < = 1.40; 0.01 < = R7 / R8 < = 0.30.

The invention belongs to the technical field of high polymer materials, and discloses a force-induced unclonable label as well as a preparation method and application thereof. Electronegative monodisperse polymer nanospheres are prepared through emulsion polymerization, and after being swelled by using an isooctyl acrylate monomer, the nanospheres, acrylamide and ethylene glycol dimethacrylate are mixed, polymerized and photocured to form the structural color hydrogel film. The hollow-out steel template is used for mechanical force pressing, randomly-distributed microcrystalline light spots are obtained after a solvent is volatilized, the optical property of force-induced discoloration is displayed, and rapid and effective identification can be achieved. Compared with a traditional hydrogel anti-counterfeit label, the label has higher stability and reusability, does not need a solvent, and is environmentally friendly and practical. The technology not only realizes high-level anti-counterfeiting and encryption, but also has the potential of large-scale production.

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 belongs to the technical field of preparation of nano fluorescent materials, and particularly relates to a preparation method and application of a polymer-based sulfur quantum dot water treatment agent. The preparation method comprises the following steps: (1) adding sulfur powder and a dispersing agent into an alkaline solution to prepare a mixed solution; (2) putting the mixed solution obtained in the step (1) into a water bath at 70-90 DEG C, heating, stirring and reacting for 15-20 minutes, and then adding an etching solvent; and (3) continuously reacting for 5-6 hours until the reaction is finished, adding the etching solvent again, and keeping the temperature for 0.5-1 hour to obtain a brownish red solution which is the sulfur quantum dot water treatment agent. The preparation method of the polymer-based sulfur quantum dot water treatment agent has the advantages of simple process, short preparation time, mild reaction conditions, low energy consumption, low cost and the like, and the prepared fluorescent sulfur quantum dot water treatment agent is simple in component and good in water solubility, can be used for inhibiting mineral scales and bacteria in industrial water, and has good application prospects. The concentration of the water treatment agent is monitored and controlled on line, and industrial production and market application prospects are achieved.

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 aquaculture, in particular to a carboxyl fluorescent quantum dot loaded gene editing system and application thereof in aquatic animal gene editing. The invention provides a preparation method of a carboxyl fluorescent quantum dot loaded gene editing system, which comprises preparation of functionalized carboxyl fluorescent quantum dots and connection of the functionalized carboxyl fluorescent quantum dots and plasmid DNA to obtain the carboxyl fluorescent quantum dot loaded gene editing system, and the carboxyl fluorescent quantum dot loaded gene editing system can be subsequently used for aquatic animal fertilized egg gene editing or cell transfection. According to the method, safe and efficient egg shell digestive enzymes and nano materials are used for gene editing breeding of aquatic animals.

The invention belongs to the technical field of SERS (Surface Enhanced Raman Scattering) substrate preparation, and particularly relates to an optimized preparation method of a high-stability composite nanostructure SERS substrate, which comprises the following steps: obtaining three-dimensional morphology characteristic data of a nano rough surface; establishing an overall physical model of the composite substrate by utilizing simulation software, setting material attributes and initial conditions of simulation, dividing grids, and carrying out solution calculation; processing parameters are selected, and a transition metal oxide TiO2 nano rough surface is prepared; the method comprises the following steps: combining an ultrasonic field with a laser ablation method, and compounding gold nanosphere particles on a transition metal oxide TiO2 nano rough surface, so as to obtain a composite nanostructure SERS (Surface Enhanced Raman Scattering) substrate; and evaluating the SERS activity through a Raman spectrum to complete the preparation of the substrate. According to the method, contact points of the gold nanospheres and the surface can be increased, so that a nano narrow slit structure on the substrate is increased, and the'hot spot 'density and the detection intensity of the SERS substrate are further improved.

The invention belongs to the technical field of organic synthesis, and particularly discloses a near-infrared organic amine BODIPY fluorescent probe capable of recognizing A beta fibers with high sensitivity and a preparation method and application thereof.The near-infrared organic amine BODIPY fluorescent probe is synthesized by enabling para-organic amine substituted benzaldehyde and BODIPY fluorescent dye to be subjected to a Knoevenagel condensation reaction; according to the present invention, the synthesized organic amine BODIPY compound can be combined with diphenylalanine dipeptide so as to achieve the selective recognition of the Abeta fiber in the hippocampus, the organic amine is combined with the BODIPY fluorescent dye, such that the optical property of the BODIPY can be effectively regulated due to the strong electron supply ability and the low steric hindrance so as to achieve the selective recognition of the Abeta fiber in the hippocampus; and the sensitivity and the performance in AD application are improved. The enhanced signal response is helpful for realizing the rapid identification of the A beta fiber, and provides a potential strategy for the prevention and treatment of AD (Alzheimer's disease).

The invention belongs to the technical field of analytical chemistry, and particularly discloses a magnetic fluorescent gold nanocluster molecularly imprinted polymer and a preparation method and application thereof in sulfadiazine fluorescence detection.The surface of Fe3O4 nanoparticles is coated with a silicon dioxide shell layer, the shell layer is subjected to surface modification, and then the Fe3O4 nanoparticles are combined with gold nanoclusters (AuNCs). On the basis, sulfadiazine (SD) is selected as a template molecule by utilizing a molecular imprinting technology, a mixed type silane coupling agent (APTES) is used as a functional monomer, and the surface of the Fe3O4 (at) SiO2 (at) AuNCs is coated with a molecular imprinting layer, so that the magnetic fluorescent gold nanocluster imprinted polymer Fe3O4 (at) SiO2 (at) AuNCs-MIPs is prepared. By combining a magnetic separation technology, high selectivity of the molecularly imprinted polymer, simplicity, convenience and rapidness and high sensitivity of fluorescence detection, sulfadiazine can be accurately and specifically recognized, and the method can be effectively applied to analysis and detection of sulfadiazine.

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens, which comprises five lenses in sequence from an object side to an image side: 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 and a sixth lens with negative refractive power, a fifth lens element with positive refractive power; the following relational expressions are satisfied: 3.00 < = (d5 + d7) / d6 < = 4.50; 3.00 < = (f5-f2) / f < = 4.00; -2.15 < = R3 / R4 < =-1.55; and 0.15 < = d9 / TTL < = 0.25. The camera shooting optical lens provided by the invention can meet the design requirements of large aperture, ultra-thinness and wide angle.

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 relates to an aperture-adjustable porous radiation refrigeration material and a preparation method thereof. The aperture-adjustable porous radiation refrigeration material is prepared by introducing inorganic nanoparticles onto a polymer-based composite material, wherein the polymer matrix composite material is prepared by compounding cellulose acetate and poly (vinylidene fluoride-co-hexafluoropropylene); the material is endowed with a layered porous structure through a solvent-nonsolvent induced phase separation method, and materials with different pore sizes are prepared by adjusting the proportion of a mixed solvent. By adjusting the proportion of the mixed solvent, the size and morphology of the pores can be adjusted, so that the reflectivity of the material to sunlight is enhanced, and the preparation method has a good application prospect.

The invention discloses a preservative film as well as a preparation method and application thereof, and the preparation method comprises the following steps: preparing ascorbic acid carbon quantum dots; preparing an acetic acid solution of chitosan; the ascorbic acid carbon quantum dots and an acetic acid solution of chitosan are mixed to obtain a film forming solution, and the film forming solution is dried to form the preservative film. The preservative film prepared by the invention is used for fruit preservation, and can inhibit the growth of mould in fruits, reduce the weight loss ratio of the fruits, slow down the reduction of soluble solids in the fruits, and realize a better fruit preservation effect.

The invention relates to the field of optical lenses, and discloses a camera shooting optical lens which comprises five lenses which are sequentially a first lens with positive refraction power, a second lens with negative refraction power, a third lens with positive refraction power, a fourth lens with refraction power and a fifth lens with negative refraction power from the object side to the image side. The following relational expression is satisfied: (R5 + R6) / (R5-R6) is more than or equal to 0.50 and less than or equal to 0.81; -4.00 < = (f2 + f5) / f < =-2.50; 0.60 < = d9 / d8 < = 2.00; 2.80 < = R9 / R10 < = 6.00; -8.00 < = (R7 + R8) / f < =-4.00. The camera shooting optical lens provided by the invention can meet the design requirements of large aperture, ultra-thinness and wide angle.

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 invention discloses a fluorescent carbon quantum dot, a preparation method thereof and application of the fluorescent carbon quantum dot in organelle and organoid imaging and mitochondrial membrane potential monitoring, and the method comprises the following steps: S1, mixing 1, 5-diamino-anthraquinone, vanillic acid and ethidene diamine in a solvent, carrying out a hydrothermal reaction under heating, and cooling to room temperature after the reaction is completed; s2, centrifuging the product obtained in the step S1, taking the centrifugate, adding silica gel, performing rotary evaporation, eluting with an eluent, collecting the eluent, and performing freeze drying to obtain the fluorescent carbon quantum dots; wherein the solvent is deionized water or ethanol, and the eluent is a mixture of dichloromethane and methanol. The G-CDs and the R-CDs provided by the invention both show excellent optical characteristics and specific mitochondrial and lysosome targeting characteristics, so that the G-CDs and the R-CDs can be used for imaging and dynamic tracking of living organelles. Meanwhile, the carbon dots are verified to have the capability of realizing efficient biological imaging in an organoid system.

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.

The present invention relates to a method for preparing a perovskite composite material based on light induction, which comprises the following steps: preparing a mixed precursor solution containing lead oleate and cesium oleate; preparing a mixed precursor powder containing a covalent organic framework material, lead oleate and cesium oleate; adding a halogenated alkane to the mixed precursor solution or the mixed precursor powder, and reacting under the action of invisible light, and after the reaction is completed, post-processing is performed to obtain a perovskite composite material CsPbX3 NCs or CsPbX3@S-COFs. The present invention has the advantages of mild and simple preparation conditions, green and environmental protection, ability to improve the stability of the composite material, and convenience in regulating the size of the perovskite.

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.

The camera module base comprises a shell and a circuit board, the upper portion and the lower portion of the shell are open, the interior of the shell is hollow, the shell is provided with a containing cavity, a circular ring clamping assembly is arranged in the containing cavity, and the circuit board is clamped in the circular ring clamping assembly. According to the camera module base, the circular ring clamping assembly is arranged in the shell, the circuit board is clamped in the circular ring clamping assembly, glue bonding and high-temperature baking of the shell and the circuit board are not needed so as to fix the circuit board, the circuit board is directly clamped through the circular ring clamping assembly, and the circuit board is not required to be damaged. Therefore, good optical characteristics of the module are maintained, and the process of installing the circuit board is simplified.

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.