94 results about "Light sensitivity" patented technology

The invention relates to the technical field of machine vision detection, particularly discloses a mechanical part surface defect vision detection system, and aims to solve the problems of blind areas, environment light sensitivity, insufficient tiny defect detection capability and the like in the detection of complex curved surface high-reflection parts. Comprising an optical imaging module, a geometrical morphology sensing module, a dynamic polarization regulation and control module, an image fusion and enhancement module and a defect identification and decision module. The three-dimensional morphology of the surface of the part is sensed in real time, the imaging polarization state is dynamically regulated and controlled according to the three-dimensional morphology, multi-frame polarization image fusion and digital diffraction enhancement processing are combined, full-coverage and high-contrast detection of the complex curved surface part is achieved, motion blur is effectively restrained, and the detection capacity of sub-pixel-level tiny defects and the system environment adaptability are improved.

The present application provides a display panel and a display device. A light-shielding layer of the display panel comprises a first light-shielding portion, a second light-shielding portion and a third light-shielding portion, wherein the first light-shielding portion can perform light shielding on a first active portion of a driving transistor, the second light-shielding portion can perform light shielding on a third active portion of a compensation transistor, and the third light-shielding portion can perform light shielding on a fourth active portion of a first initialization transistor, thereby improving the photosensitivity and electrical properties of the compensation transistor and the first initialization transistor.

This invention discloses a coumarin-linked conjugated porous polymer, its preparation method, and its applications. The preparation method includes: subjecting a homogeneous mixture containing o-hydroxybenzaldehyde monomer, phenylacetonitrile monomer, solvent, and catalyst to a Knauven-Gail condensation reaction to obtain the coumarin-linked conjugated porous polymer. The coumarin used in this invention to prepare the coumarin-linked conjugated porous polymer is a highly planar molecule. Its full conjugation extends the absorption wavelength to the visible light region and enhances π-electron excitation, thus exhibiting strong photosensitivity. The resulting series of coumarin-linked highly conjugated nanoarray conjugated porous polymers possess high porosity and a fully conjugated structure, making them highly efficient for applications in photocatalysis, fluorescence sensing, and optoelectronic devices.

The present invention is directed to a method for printing a micro-scaled or nano-scaled XUV and / or X-ray Diffractive optic (1), including the following steps: a) providing a material (2) with a first component (2a) being photo-sensitive and being polymerizable by two-photon-absorption, b) providing data (3) of a desired geometrical structure (4) of the optic (1) and creating at least one trajectory (8) corresponding to the data (3) of the desired structure (4) of the optic (1), c) providing a high-intensity energy beam (5), in particular a laser beam, wherein the beam (5) comprises a focus (F) having a position being adjustable to a plurality of positions (F1, F2, <, Fp) being coincident with the at least one trajectory (8), d) polymerization of the material (2) by two-photon-absorption at a first position (Fn) of the focus (F), thereby creating a first voxel (vn1n2n3) of the structure (4) of the optic (1), adjusting the position of the focus (F) from the first position (Fn) to a subsequent position (Fn+1) of the focus (F) along the at least one trajectory (8) and repeating step d) at the subsequent position (Fn+1) of the focus (F), wherein a distance (d) between each of the positions (F1, F2, <, Fp) of the focus (F) and at least one of the rest of the positions (F1, F2, <, Fp) of the focus (F) is smaller than a mean diameter (vd) of the voxels produced at these positions with respect to their dimension parallel to the distance (d).

This utility model discloses a nursing medication preparation teaching workbench, belonging to the field of teaching equipment technology. It aims to solve the technical problems of high light leakage risk and insufficient light-blocking effect of traditional light-blocking measures. The workbench includes a table body with lifting mechanisms arranged on both sides inside. A teaching mechanism is connected to the lifting mechanisms and is located in the middle of the table body. The teaching mechanism includes an outer frame, inside which is an inner frame. A cavity is formed between the inner and outer frames, and sliding rails are arranged on both sides inside the cavity. This utility model, through the design of a top plate and a light-blocking curtain structure, allows the top plate, along with the light-blocking curtain mounted on its lower surface, to extend from the cavity when the outer frame is raised from inside the table body, forming a dark space. This space reduces external light, facilitating students' medication preparation operations with photosensitive drugs and reducing the risk of photolysis reactions caused by light exposure.

Disclosed are a frontside illuminated image sensor and a method of manufacturing the same. More particularly, a frontside illuminated image sensor and a method of manufacturing the frontside illuminated image sensor include a light scattering portion in a substrate, configured to increase a path of incident light, thereby preventing cross-talk between adjacent pixels and increasing light sensitivity.

The present invention concerns a new gene therapy approach to increase light-sensitivity in degenerating cones in advanced stages of rod-cone dystrophy (RCD) mediated by G-protein-gated-K+ channel (GIRK), in particular GIRK1 F137S, activated by G proteins recruited by cone opsin expressed in degenerating cones.

The application discloses a morphology-controllable sulfur-functionalized metal organic framework catalytic material and a preparation method and application thereof, ligands of the catalytic material are thiophene-2,5-dicarboxylic acid, a metal source is bismuth salt, and the MOFs material has different morphologies, including micro-flower spherical, spiderweb and micro-flower, by adjusting the ratio of the metal and the ligand. A series of S-MOFs materials are prepared by using thiophene-2,5-dicarboxylic acid as an organic ligand containing S atoms and using bismuth salt as a metal source, the performance of the catalytic material in a spiderweb shape is obviously improved compared with the performance of other morphologies, and meanwhile, the preparation experiment process is simple. Bi-TDCs with different ligand and metal ratios show different ultrasonic-light synergistic catalytic activities. The incorporation of S atoms makes the material have photosensitivity, and the utilization efficiency of visible light is increased.

This invention discloses a chemiluminescence gas sensor based on polyoxometalates (POMs), and relates to its fabrication method and application. The sensor is suitable for detecting ammonia at room temperature. The gas sensor includes an adapter base and a sensing element, wherein the sensing element consists of interdigitated electrodes and a sensitive material loaded on the electrode surface. This sensitive material is a composite material of POMs and SnO2. POMs, as excellent electron acceptors, possess good redox properties, thermal stability, and photosensitivity. When combined with SnO2, they can effectively suppress electron-hole recombination, thereby significantly improving the gas-sensing performance of the semiconductor material. Compared with existing technologies, the sensor provided by this invention exhibits high response characteristics to ammonia at room temperature, while also demonstrating excellent selectivity and repeatability.

The application discloses a kind of high transparent rare earth nanoparticles / cage polysilsesquioxane composite photoresist and its preparation method and application, the photoresist includes the composite matrix consisting of cage polysilsesquioxane, multifunctional acrylate and photoinitiator, and the rare earth nanoparticles modified by bifunctional ligand.The bifunctional ligand anchors nanoparticles by first functional group, and forms chemical bonding with matrix by second functional group, realizes the atomic level uniform dispersion of nanoparticle.The photoresist has very high optical transparency, high-efficiency up-conversion luminescence performance and very high ultraviolet photosensitivity.Its preparation process is simple, without high-temperature expensive equipment, can be adapted to a variety of photo-curing technology realizes the integration precision forming of complex three-dimensional structure luminescence device, has wide application prospect in integrated photonics device field.

The invention relates to a preparation method of a tetrahydroxy tetraphenyl ethylene photoinitiator. According to the method, tetrahydroxy tetraphenyl ethylene and a diazo naphthoquinone sulfonyl chloride compound are subjected to a condensation reaction to prepare the diazo naphthoquinone photoinitiator, and the photolysis rate of the diazo naphthoquinone photoinitiator is tested. The preparation method specifically comprises the following steps: in an organic solvent, taking tetrahydroxy tetraphenyl ethylene and diazonaphthoquinone sulfonyl chloride as raw materials, and carrying out esterification condensation reaction under the action of a catalyst to obtain the tetrahydroxy tetraphenyl ethylene photoinitiator. The tetrahydroxy tetraphenyl ethylene photoinitiator synthesized by the invention has the following advantages: compared with the traditional photoinitiator, the light sensitivity is obviously improved; the ultraviolet absorption capability is stronger, and the photosensitive performance is more excellent.

The invention discloses a polyimide precursor, a photosensitive material and application thereof, the photosensitive material comprises the polyimide precursor, and the polyimide precursor comprises a repeating unit shown in the following structure (I): (I) the photosensitive material is prepared through molecular structure design and process innovation and through the synergistic effect of a fluorine-containing monomer, a photo-crosslinking group and a crosslinking reinforcing agent; the low dielectric constant (smaller than or equal to 2.5), the high line width resolution (smaller than or equal to 1.5 microns) and the high thermal stability (Td5% is larger than or equal to 450 DEG C) are achieved, and the material is suitable for a 5G high-frequency communication substrate, a three-dimensional packaging intermediate layer, a flexible display device and an OLED display protection film. Compared with the traditional PMDA-ODA polyimide, the photosensitivity is realized, the dielectric constant is reduced by about 40%, the resolution ratio is improved by about 50%, and the thermal stability (Td < 5% >) is also obviously improved.

This invention provides a photosensitive polyurethane film with a surface grating, its preparation method, and its applications. The photosensitive polyurethane film with a surface grating exhibits well-defined and controllable photoresponse characteristics. Its core mechanism lies in the photosensitive monomer responding to light stimulation of a specific wavelength through a dimerization reaction: under ultraviolet light irradiation, the photosensitive monomer in the film undergoes a [2+2] cycloaddition to generate a four-membered cyclobutane dimer. This response mechanism is clear, the triggering path is independent, and the response efficiency is high. It effectively overcomes the limitations of existing coumarin derivatives, which can only achieve self-healing technology. By controlling parameters such as irradiation time and number of irradiations, multi-dimensional information storage can be achieved, significantly improving information storage capacity and stability. This effectively solves the urgent problem of high-capacity information storage in the current field of optical encryption materials, providing a feasible technical path for improving the performance and expanding the practical applications of optical encryption materials.

The invention discloses a bifunctional molecular group structure for photoresist. The bifunctional molecular group structure comprises a linker, PAG molecules and PDQ molecules. And the linker contains a carbon-oxygen chemical bond or a carbon-nitrogen chemical bond. PAG molecules and PDQ molecules are synthesized on each linker at the same time, wherein the number of the PAG molecules and the number of the PDQ molecules are in proportion, and the total number of the PAG molecules and the PDQ molecules is three or more. And PAG molecules are synthesized on the linker through a carbon-oxygen chemical bond. PDQ molecules are synthesized on the linker through a carbon-nitrogen chemical bond. The invention also discloses a synthesis method of the bifunctional molecular group structure for the photoresist. The invention also discloses a use method of the photoresist adopting the bifunctional molecular group structure. According to the invention, the proportion of PAG molecules to PDQ molecules can be set, so that the uniformity of PAG and PDQ in the photoresist can be ensured, the uniformity and roughness of the line width of the photoresist can be ensured, and different requirements of users on the contrast ratio and light sensitivity of chemical amplification glue can be met at the same time.

The invention relates to the technical field of light curing, in particular to light-cured resin and a preparation method thereof as well as a photosensitive resin composition and application thereof, and the light-cured resin is prepared from the following raw materials in parts by weight: 500-700 parts of epoxy resin, 2-4 parts of a catalyst, 2-4 parts of a polymerization inhibitor, 50-100 parts of acrylic acid, 90-150 parts of anhydride, 40-60 parts of a functional aid and 600-900 parts of a solvent. By introducing the specific functional auxiliary agent, the common defects of high curing shrinkage rate, insufficient adhesive force, low light sensitivity, poor chemical resistance and the like in the solder resist dry film are overcome, and the solder resist dry film shows good comprehensive performance.

The invention discloses a high-power grating carrier optical fiber and a preparation method thereof, and relates to the technical field of laser manufacturing equipment. The high-power grating carrier optical fiber comprises a fiber core, and an inner cladding, a quartz outer cladding and an organic resin coating which are sequentially sleeved on the surface of the fiber core, the fiber core is composed of a core layer with a concave central refractive index and a germanium-doped core layer which is sleeved on the core layer with the concave central refractive index and is concentric with the core layer. And the inner cladding consists of five layers of refractive index modulated germanium-fluorine-doped quartz claddings of which the refractive indexes are alternated from high to low. The high-power grating carrier optical fiber not only has good photosensitivity and does not need hydrogen-loading sensitization, but also can inhibit different high-order modes to different extents under different wavelengths, effectively solves the problem that the endurance capacity is reduced due to heating of the carrier optical fiber in a laser working state, and improves the stability of the high-power grating carrier optical fiber due to regulation and control of a mode coupling state. And the output beam quality of the laser is greatly improved.

The invention relates to the technical field of dyes, in particular to a non-photosensitive yellow dye composition and a dyeing method, the non-photosensitive yellow dye composition is prepared by compounding a compound A and a compound B, and the mass ratio of the compound A to the compound B is (10-90): (10-90); the method has the advantage that the light fastness and the dyeing uniformity of the dye can be improved at the same time.

The present disclosure provides an isolated photosensitive opsin protein that rapidly, reversibly and accurately restores the sensitivity of retinal cells to light by activating Gq signaling.

A method of selectively transferring microdevices from a donor substrate to contact pads on a receiver substrate is disclosed. The method can include providing a donor substrate including a plurality of microdevices, transferring the plurality of microdevices to an intermediate substrate, aligning a selected set of microdevices on the intermediate substrate proximate to a system substrate, providing a photosensitive layer between the selected set of microdevices and the system receiver, activating the selected set of microdevices to cure the photosensitive layer between the selected set of microdevices and the system substrate with light emitted by the selected set of microdevices, and bonding the selected set of microdevices to corresponding contact pads on the system substrate.

The invention discloses a supported copper-based nanorod heterojunction photocatalyst as well as a preparation method and application thereof. The heterojunction composite photocatalytic material provided by the invention comprises the following components: a carrier copper bismuthate nanorod and ZIF-67 on the surface of the carrier copper bismuthate nanorod. The preparation method comprises the following steps: adding a copper source and a bismuth source into water, and carrying out hydrothermal reaction to obtain a copper bismuthate nanorod CuBi2O4; mixing the obtained copper bismuthate nanorod with a cobalt source and an imidazole compound, stirring, and growing a ZIF-67 dodecahedron on the surface of the copper bismuthate nanorod in situ to obtain the heterojunction composite photocatalytic material ZIF-67 / CuBi2O4. The ZIF-67 / copper bismuthate heterojunction photocatalyst prepared by the invention has good photosensitivity, and can meet the requirement of producing methane by photocatalytic reduction of carbon dioxide; as a heterojunction composite photocatalytic material, the material has good photoelectrochemical properties, and can meet the requirements of efficient photoelectric conversion, wide spectral response, long cycle life and the like.

The invention relates to the field of dyes, and particularly discloses a low-photosensitive high-fastness reactive gray dye composition and a preparation method and a dyeing method thereof, and the dye composition comprises the following raw materials: 28-35 wt% of reactive red, 15-25 wt% of reactive blue 220, 25-40 wt% of reactive blue 222, and the balance of a solvent. The preparation method of the dye composition comprises the following steps: mixing the reactive red, the reactive blue 222 and the reactive blue 220 in proportion, performing jet milling, adding a solvent, and performing spray drying to obtain the powdery dye. The dyeing method comprises the following steps: immersing a fabric into the gray dye composition according to a water bath ratio of 1: (8-12) at 50-70 DEG C, adding anhydrous sodium sulphate, carrying out heat preservation for 25-35 minutes, adding sodium carbonate, carrying out heat preservation for 50-65 minutes, fishing out the fabric, and carrying out water washing, soaping and water washing to obtain the dyed fabric. The obtained dyed fabric is low in light sensitivity and high in fastness.

The invention provides a macromolecular photoinitiator composition, a photopolymer composition, a holographic grating and a holographic display system. The macromolecular photoinitiator composition provided by the invention is prepared from the following components in percentage by mass: 5 to 15 percent of isocyanate compound, 0.1 to 5 percent of photosensitive dye, 5 to 20 percent of coinitiator, 10 to 30 percent of acrylate compound, 1 to 15 percent of fluorine-containing compound, 20 to 60 percent of first solvent and 0.1 to 2 percent of catalyst. The macromolecular photoinitiator composition can react to form a polyurethane photoinitiator grafted with a photosensitive dye, a coinitiator, an acrylic acid compound and a fluorine-containing compound, so that not only can the solubility of the photoinitiator in an organic system be effectively improved, but also the photosensitivity and the diffusion rate of the photoinitiator can be improved; therefore, the uniformity, the light sensitivity, the resolution ratio, the diffraction efficiency and the refractive index modulation degree of the formed holographic grating can be greatly improved.

The application provides a high beam adaptive control method, system, device and medium, relates to the technical field of vehicle lighting control, and the method comprises the following steps: acquiring the driving environment of a target vehicle, and generating a first light scheme of a high beam; in combination with the first vehicle feature of the target vehicle and the second vehicle feature of an oncoming vehicle, and the distance between the target vehicle and the oncoming vehicle, generating an adjustment index of the high beam, adjusting the first light scheme according to the adjustment index, and generating a second light scheme; in combination with the driving time length of the driver of the target vehicle, the blink frequency of the driver and the pupil change rate, generating a visual fatigue parameter of the driver, calculating the light sensitivity coefficient of the driver according to the visual fatigue parameter; in combination with the visual fatigue parameter and the driving environment, generating a driving risk coefficient, and in combination with the driving risk coefficient and the light sensitivity coefficient, adjusting the second light scheme to generate a target light scheme. The application has the technical effect that the safety of night driving is ensured.

Disclosed is an apparatus and method for combating light sensitivity, or photophobia, for people with low vision. Both the apparatus and method filter particular wavelengths of light associated with photophobia. This filtering is achieved while maintaining a luminance that is acceptable to the user and that maintains contrast. The apparatus of the disclosure is a mechanical filter that can be applied over an electronic screen. The method utilizes software and a filtering module associated with either the CPU or GPU of a computer. The filtering module processes a video signal by eliminating certain targeted wavelengths of light.

The invention provides a detection system for dynamically switching multiple silicon photomultipliers. The device is characterized by comprising a silicon photomultiplier array module (1), a light intensity detection module (2), a control module (3), a signal processing module (4), a bias power supply module (5), a high-speed analog switch network (6), a PIN photodiode (7), a trans-impedance amplifier (8), a low-pass filter circuit (9), a single chip microcomputer (10), a drive circuit (11), a pole zero compensation circuit (12), a filter noise reduction circuit (13), a high-speed ADC (14) and a silicon photomultiplier independent parallel unit (15). The invention can be used for solving the technical problems that the silicon photomultiplier is easy to saturate in a wide light intensity environment and the weak light sensitivity is insufficient, and can be widely applied to the fields of laser radar, medical imaging, industrial visual inspection and the like which require wide light intensity range adaptive photon detection.

The embodiment of the invention discloses a training method of a video noise reduction model and a video noise reduction method. The training method of the video noise reduction model comprises the following steps: acquiring a training sample noise reduction data set; the training sample noise reduction data set is input into a to-be-trained video noise reduction model, a denoised center frame image corresponding to the training sample noise reduction data set is output, and the to-be-trained video noise reduction model comprises a sensitivity modulation module, an inter-frame attention modulation module and a backbone network; acquiring a loss function according to the central frame image and the reference central frame image; and adjusting model parameters according to the loss function until a training ending condition is met, and determining a target video noise reduction model. According to the invention, based on the convergent target video noise reduction model which effectively combines the sensitivity modulation module and the inter-frame attention modulation module, the center frame image after noise reduction can be accurately and reliably obtained, and meanwhile, a foundation is laid for video noise reduction processing based on the target video noise reduction model.

The invention relates to a flexible brain-computer interface with high mechanical stability and a preparation method, and belongs to the field of bioelectronics. The interface comprises a flexible polyimide substrate; the composite metal microelectrode layer is formed on the flexible polyimide substrate through a vacuum evaporation process, the composite metal microelectrode layer comprises a chromium layer serving as a transition bonding layer and a gold layer serving as a conductive functional layer, the chromium layer is in direct contact with the flexible polyimide substrate so as to enhance the interface bonding strength, and the gold layer covers the chromium layer; and the photosensitive polyimide packaging layer is formed by patterning through a photoetching process and covers the composite metal microelectrode layer and part of the flexible polyimide substrate, and the photosensitive polyimide packaging layer is provided with a window which exposes part of a gold layer in the composite metal microelectrode layer to serve as an electrode contact site and an electrode bonding pad. The core problems that the interface bonding force between the existing titanium-based metal microelectrode and the flexible substrate is weak, and the mechanical-electrical stability is difficult to cooperate under long-term implantation are solved.

Provided is a cured product that are easy to apply marking ink to the surface, have excellent adhesion with the marking ink after curing, and can form markers with excellent legibility of letters and symbols on the surface. A cured product of a curable resin composition comprising a curable resin and an inorganic filler, the inorganic filler comprising an amorphous silica, the cured product having an average linear thermal expansion coefficient of 70 to 100 ppm / °C when the temperature is changed from 0 to 180°C.

This invention belongs to the field of exhibition lighting control, and particularly relates to a method and system for optimizing and controlling the light environment parameters of exhibition spaces based on illuminance perception. The method first constructs a three-dimensional model by acquiring exhibition semantic information and spatial constraints, and extracts the light sensitivity level of exhibits and its spatial fluctuation information, thereby dividing the illuminance control zone sequence. Then, it integrates the light sensitivity damage rate and the importance of exhibits to determine a dynamic set of target light parameter control intervals. By constructing a hierarchical target mapping function that integrates adaptability, viewing experience, and energy-saving indicators, and dynamically setting the primary and secondary control functions for different time periods based on the priority factors of the control indicators, an optimization search algorithm is used to solve for the optimal light parameter set for each time period, and the light parameter control indicators are obtained through inversion. This invention achieves adaptive equilibrium optimization of the exhibition lighting environment among multiple objectives: preventive protection of cultural relics, visitor visual experience, and system energy efficiency.

The invention relates to the technical field of epoxy resin materials, in particular to a high-adhesion epoxy resin composition and application thereof in semiconductor chip packaging. The photoresponsive epoxy resin composition comprises photoresponsive modified anhydride, a nano composite filler, a photothermal dual-response accelerator, an interface modification coupling agent, an efficient release agent and heterocyclic epoxy resin. According to the invention, by introducing the photoresponsive modified anhydride grafted with photosensitive groups and the core-shell structure nano-composite filler coated with the near-infrared light absorption dye layer on the surface, and cooperating with the microencapsulated photothermal dual-response accelerator, the composition has the advantages that after an optical semiconductor chip is packaged, the photoresponse property of the composition is greatly improved; the light of a specific wave band generated by working of the chip can be utilized to trigger rearrangement and microstructure optimization of a curing network, and meanwhile, through the photo-thermal conversion synergistic effect of the nano composite filler, the comprehensive improvement of the linear expansion coefficient, the heat-conducting property, the aging resistance and the bonding strength is realized on the premise of keeping high light transmission.