43 results about "Optical contrast" patented technology

Embodiments described include adhesive bus bars for electrochromic or other optical state changing devices. The bus bars are configured to color match and / or provide minimal optical contrast with their surrounding environment in the optical device, provide better adhesion than ink based bus bars, as well as obviate the need to mitigate defects in underlaying layers.

The invention provides a high-performance electrochromic compound capable of realizing switching between a blue system and a transparent state by adjusting the proportion of a polymer receptor and a preparation method of the high-performance electrochromic compound. The electrochromic film prepared on the basis of the compound shows a blue system in a neutral state, and the color is switched to a transparent state along with the increase of external voltage. The optical contrast of the electrochromic compound in the wavelength range of 642 nm is 52.65%, the coloring time is 0.65 s, and the fading time is 0.32 s. The optical contrast ratio of the electrochromic film can keep 95.29% of the initial contrast ratio after 1000 cycles under the step voltage of 0V and 1.0 V. The electrochromic film is a solution-processable electrochromic material which has excellent performance and can be switched between blue and transparent colors.

This invention relates to a method for preparing and applying polyamides from a monomer containing 7-methyldibenzo[c,g]carbazole and triphenylamine: 4-({9-[(4-aminophenyl)(4-methoxyphenyl)amino]-7-methyldibenzo[c,g]carbazole-5-yl}(4-methoxyphenyl)amino)aniline. To address the problems of low solubility, difficulty in film formation, poor cycling stability, narrow color change range, and limited functionality in polyamide materials, this invention constructs two triphenylamine groups on 7-methyldibenzo[c,g]carbazole and introduces a methoxy group onto the triphenylamine to increase the polymer's solubility and stability. The polymer of this invention exhibits excellent electrochromic properties, including excellent cycling stability, fast switching time, and high optical contrast. Furthermore, to address the material's multifunctionality, a naphthalene unit is added to the molecular structure, resulting in a polymer with fluorescent emission. This invention can be applied to displays, rearview mirrors, camouflage applications, and the fluorescence detection of p-trinitrophenol.

The invention discloses multicolor optical anti-counterfeiting alumite and a production process thereof. The alumite sequentially comprises a magnetic-sensitive enhanced substrate layer, a dynamic separation layer, a temperature-magnetic composite nanofiber multicolor layer, a polyelectrolyte alternate deposition barrier layer and a gradient magnetic-sensitive aluminized layer from bottom to top, wherein the magnetic-sensitive enhanced substrate layer, the dynamic separation layer, the temperature-magnetic composite nanofiber multicolor layer, the polyelectrolyte alternate deposition barrier layer and the gradient magnetic-sensitive aluminized layer are arranged on the alumite; wherein the magnetic-sensitive enhanced substrate layer comprises a graphene modified PET supporting layer and a three-dimensional net-shaped micro-channel embedded with Fe3O4 particles, the dynamic separation layer is temperature-sensitive phase change fluororesin, the temperature-magnetic composite nanofiber colorful layer is electrostatic spinning nanofibers of a core-sheath structure, and the blocking layer is of a polyelectrolyte alternate deposition structure and is embedded with infrared invisible identification particles. According to the invention, four anti-counterfeiting functions of multicolor optical response, magnetic response activation and infrared invisible two-dimensional codes are integrated, the advantages of high multicolor optical contrast, fast response, multiple reuse times, excellent barrier performance, stable transfer printing and the like are achieved, the method is suitable for scenes of high-end tobacco and wine, luxury packaging, high-added-value labels and the like, and the anti-counterfeiting grade and the practicability are obviously improved.

Hyperbranched polyamides containing methylpiperazine and polytriphenylamine structures, and preparation method and application thereof. The present application relates to a monomer containing methylpiperazine and triphenylamine core: N1, N1-bis(4-aminophenyl)-N4-(4-(bis(4-aminophenylamino)phenyl)4-(4-(4-methylpiperazine-1-yl)phenyl)phenyl-1,4-diamine, and a preparation method and application of hyperbranched polyamides. In order to solve the problems of low solubility in organic solvents, poor thermal stability, single color change, low optical contrast and poor electrochemical stability of triphenylamine-based polyamide materials, methylpiperazine electron-donating groups and multiple electroactive centers are introduced in the molecular design process, and hyperbranched polyamides are synthesized, which increase the color change ability and cycle stability of the polymer. The solubility of the hyperbranched polyamide is significantly improved, and at the same time, it has excellent electrochromic performance, including excellent cycle stability, multiple color changes and high optical contrast. The present application is applied to the fields of electrochromic display, sensing and photoelectric detection.

The invention provides a solid material surface processing method which comprises the following steps: S1, arranging a conductive film layer on the surface of a solid material to obtain a semi-finished product A; s2, a groove is formed in the surface of the semi-finished product A with the ion beam current of 0.05-0.5 [mu] A through the focused ion beam technology, and a semi-finished product B is prepared; and S3, removing the conductive film layer on the surface of the semi-finished product B. According to the processing method for the surface of the solid material, the current of the ion beam can be accurately regulated and controlled, so that grooves with different depths are accurately formed in the surface of the solid material, and the bottoms of the grooves protrude towards the notch direction of the grooves. The surface of the finished product prepared by the processing method provided by the invention is provided with nanoscale grooves with different depths, the bottoms of the grooves protrude towards the notch direction of the grooves, and the protrusions at the bottoms of the grooves enable design patterns formed by the grooves to present higher definition and contrast through enhanced optical contrast characteristics, so that the product quality is improved. Good mechanical stability and damage resistance are realized.

The application belongs to the technical field of high-reflectivity extreme ultraviolet elements, and provides a LaNx / La / B4C extreme ultraviolet multilayer film mirror and a preparation method thereof.The LaNx / La / B4C extreme ultraviolet multilayer film mirror comprises a plurality of periodic LaNx / La / B4C layers which are stacked on a substrate; the plurality of periodic LaNx / La / B4C layers comprise a plurality of LaNx / La / B4C layers which are stacked; the LaNx / La / B4C layer comprises a LaNx layer, a La layer and a B4C layer which are stacked in sequence; and the LaNx layer in the LaNx / La / B4C layer is in contact with the substrate. The La layer is introduced between the B4C layer and the LaNx layer to reduce the interaction between the LaNx and the B4C, thereby reducing the interface diffusion to enhance the optical contrast between the layers and improve the theoretical reflectivity of the LaNx / La / B4C extreme ultraviolet multilayer film mirror.

This invention relates to the field of integrated circuit packaging substrate manufacturing technology, specifically to an automated reading method for laser drilling target identification based on transient optical contrast. The method includes: laser windowing to expose the underlying target pattern; integrating a cleaning device on the spindle of the laser drilling equipment to apply a volatile cleaning liquid to the target surface, utilizing the inherent microscopic height difference between the target pattern and the gap between the patterns to form a gradient liquid film; controlling the waiting time after cleaning, utilizing the difference in evaporation rate of the liquid film in the raised and recessed areas to form transient optical contrast, which the laser equipment uses to identify the target boundary; and establishing a processing coordinate system based on the grasped target for laser drilling. This invention provides an automated reading method for laser drilling target identification based on transient optical contrast, solving the target identification problem caused by the copper structure background and similar reflectivity of the target pattern, achieving full automation of target reading, and improving reading success rate, equipment utilization rate, production efficiency, and yield stability.

This invention provides a cyan-transparent electrochromic polymer, its preparation method, and its applications, belonging to the field of electrochromic polymer technology. The invention uses 6,6'-(2,6-dibromo-4H-cyclopentano[2,1-b:3,4-b']dithiophene-4,4-diyl)bis(hexyl-1-ol), 2,6-di(trimethyltin)-4,4-di(2-ethylhexyl)-dithiophenecyclopentadiene, and 4,7-dibromobenzo[c][1,2,5]thiadiazole as main raw materials, reacting them under the action of a catalyst to obtain a cyan-transparent electrochromic polymer. The film made from the cyan-transparent electrochromic polymer of this invention has an optical contrast ratio of 47.01% in the 719 nm wavelength range, a coloring time of 0.81 s, and a fading time of 0.32 s.

A method for imaging tissue is provided. The method includes illuminating a target tissue via a light-emitting diode. The method further includes acquiring a plurality of timed images of the target tissue including an excitation image corresponding to an excitation state of the light-emitting. Additionally, the method includes generating a relative lifetime map of the target tissue based on the plurality of timed images.

This application relates to the field of electrochromic materials technology, and discloses a polymeric electrochromic material and its application in anti-glare rearview mirrors. The polymeric electrochromic material is formed by in-situ polymerization and curing under ultraviolet light of a solvent, a polyurethane prepolymer with terminal double bonds, a violet derivative containing double bonds, a complementary electrochromic material, and a photoinitiator. The violet derivative containing double bonds is covalently anchored to the three-dimensional polymeric gel network framework formed by the crosslinking of the polyurethane prepolymer with terminal double bonds. This invention restricts the directional migration of the chromogenic groups through chemical bonding, effectively solving the problems of easy leakage and delamination during long-term operation of traditional devices. Simultaneously, the use of polyether soft segments to construct ion channels ensures that the device has a second-level response speed and high optical contrast. The material has a simple preparation process, good weather resistance, and is particularly suitable for automotive anti-glare rearview mirrors.

The invention discloses a method for improving the photoelectric property of a 3, 4-propylene dioxythiophene-based polymer through molecular weight change, and relates to an organic photoelectric material. By designing 3, 4-propylene dioxythiophene-based polymers based on different molecular weights and researching the changes of light, electricity, heat, force, morphology and the like, especially the electrochromic performance, the electrochromic optical contrast and coloring efficiency are improved, and the method is a novel electrochromic functional layer material screening method and has wide application prospects. The preparation method has important guiding significance on electrochromic application of the polymer.

The invention discloses a PEDOT conductive polymer based on a ClO4 <-> and PF6 <-> doping system, and relates to an organic photoelectric material. According to the invention, based on different doping systems (ClO4 <-> and PF6 <->), the electrochemical performance, the electrochromic behavior, the thermal stability and the change of the surface appearance of poly (3, 4-ethylenedioxythiophene) (PEDOT) are researched. The electrochromic performance of PEDOT is improved through doping, and the method has important guiding significance on electrochromic application of the polymer. The invention discloses a preparation method for doping ClO4 <-> and PF into a polymer PEDOT (poly (3, 4-ethylenedioxythiophene)), the series of conductive polymers are doped by using different doping agents, so that the optical contrast and coloring efficiency of electrochromism are improved, and the conductive polymers are novel electrochromism functional layer materials.

To provide a new type of electrochromic polymer and a device using this polymer. [Solution] Electrochromic polymers are JPEG2026057544000090.jpg21170 (In the formula, MCL represents the meta-conjugated linker, and Ac represents the aromatic moiety) The disclosed electrochromic polymer has absorption initiation below 420 nm in the neutral state and absorption in the visible and / or near-infrared wavelengths in the oxidized state. Therefore, when used in an electrochromic device, the disclosed electrochromic polymer exhibits high transparency and high optical contrast.

The application discloses a kind of optical satellite multi-star radiation reference correction and consistency evaluation method, using the field observation data of global radiation field network respectively to selected optical reference satellite, each optical contrast satellite is re-corrected, and the radiation reference of the optical reference satellite, each optical contrast satellite is corrected to the same level;After re-correcting, optical reference satellite and each optical contrast satellite are combined two by two, and the following operations are completed for each pair of combination: spatial matching and spectral matching factor matching are carried out, and star matching data set is obtained;The consistency evaluation coefficient of star matching data set is calculated, and the results of optical reference satellite and optical contrast satellite are evaluated.The application can accurately evaluate the consistency of multi-star radiation by optimizing the calibration difference of satellite itself when evaluating the consistency of optical satellite.

The invention belongs to the technical field of organic photoelectric materials, and particularly relates to a halogenated anisole side chain-containing dithienyl pyrrole monomer, a conjugated polymer, a preparation method and application. The structural general formula of the monomer is shown in the specification; wherein R is selected from any one of the group. In conclusion, the invention provides the halogenated anisole side chain-containing dithienyl pyrrole conjugated polymer as well as the preparation method and the application thereof, and the conjugated polymer and a film formed by the conjugated polymer have good electrochemical stability, relatively high optical contrast and high response speed, and have excellent application value in the field of electrochromism.

The invention belongs to the technical field of electrochromic materials, and discloses an epiindoledione polymer as well as a preparation method and application thereof. The invention provides the epiindoledione polymer, the epiindoledione serves as a heterocyclic monomer which is unique in structure and easy to functionalize, the molecular structure of the epiindoledione contains amide and a conjugated aromatic system at the same time, and the epiindoledione polymer has good electron transmission capacity and controllable electrochemical activity. A film prepared from the compound is orange in a neutral state and transparent in an oxidation state, the optical contrast ratio is 37% in the wavelength range of 408 nm, the coloring time is 0.96 s, and the fading time is 2.94 s. The optical contrast ratio after 1250 cycles under the step voltage of 0V and 1.0 V can still keep 25% of the original contrast ratio, and the electrochromic material is high in chemical stability, high in sensitivity and short in response time.

Electronic arrangement (1) with: - a carrier (2), - at least one connecting surface (6) on the support (2), - at least one optoelectronic component (3a) which is attached at least to the connecting surface (6) by means of a contact material (4), - a cover surface (5) that surrounds the connecting surface (6) on the support (2), and - at least one covered area (15, 16, 17, 18, 19) which is covered by a covering material (10), wherein - the cover surface (5) is highly reflective with a reflectivity greater than 70%, and exposed areas on the connecting surface (6) and on the contact material (4) are covered with the cover material (10), wherein the cover material (10) is colored by titanium dioxide (TiO2) particles such that the titanium dioxide particles in the cover material (10) are provided at a proportion of 25% to 70% by weight, so that the cover material (10) is highly reflective with a reflectivity greater than 70%, thereby minimizing optical contrast between the cover surface (5) and the covered area (15, 16, 17, 18, 19), wherein the difference in reflectivity between the cover surface (5) and the cover material (10) is less than 20%, - that at least one optoelectronic component (3a) is a radiation-emitting component that is encapsulated with a potting material (13) in which scattering centers (12) are introduced, and - the area covered by the covering material (15, 16, 17, 18, 19) comprises side surfaces (7) of the optoelectronic component (3a).

The present invention relates to novel transparent free-standing Al (III) incorporated Li-ion based solid-gel electrolyte for enhancement of optical contrast of electrochromic device. More particularly, the present invention relates to Al (III) incorporated Li-ion based free-standing solid-gel electrolyte for enhancement of optical contrast which comprises of a unique transparent, flexible, free-standing, solid-gel polymer electrolyte, its composition and process for preparation thereof. The unique Al(iii) incorporated Li-ion based free-standing solid-gel electrolyte reveals a high optical contrast, as well as faster switching kinetics from bleached state to colored state or vice versa on changing the external voltage. A significant increase in optical contrast from 50% to 82% is obtained with a faster switching kinetics.

Port wine birthmark, also known as port wine stain (PWS) is a skin discoloration characterized by red / purple patches caused by vascular malformation. In this disclosure, we propose a photoacoustic (PA) guided US focusing methodology for PWS treatment which combines the optical contrast-based selectivity with US penetration to focus the US energy onto the vasculature. The PA signals collected by the transducers when time-reversed and transmitted converge onto the PWS, thus, minimally affecting the neighboring tissue. We performed simulations that mimic realistic transducers and medium properties for this proof of concept study demonstrating the feasibility of the proposed methodology.

The invention belongs to the technical field of high polymer materials and electrochromism, and provides a preparation method and application of a column [5] arene conjugated polymer containing a D-A-D structure. The preparation method comprises the following steps: derivatizing column [5] arene, and synthesizing column [5] arene with thienyl on a side chain through Suzuki coupling reaction; and further taking the column [5] arene conjugated polymer as a polymeric monomer, and polymerizing with a triphenylamine derivative containing a donor-acceptor structure through a Heck reaction to obtain the column [5] arene conjugated polymer with an electrochromic function. A D-A-D structure is introduced into a column [5] arene electrochromic system for the first time, and an electrochromic device manufactured based on the column [5] arene electrochromic system is yellow in a neutral state and green in an oxidation state, and is short in response time, high in optical contrast, good in cycling stability, simple and convenient in synthesis process, low in cost and easy for industrial production; wide application prospects are shown in the fields of dimming glass, intelligent portholes and the like.

The invention discloses an antimony-tellurium-based all-optical phase change brain-like computing device based on a novel pulse programming mode. The antimony-tellurium-based all-optical phase change brain-like computing device sequentially comprises a substrate and a waveguide dielectric layer from bottom to top, the waveguide dielectric layer comprises a square structure on the bottom surface and a ridge-shaped central bulge positioned above the bottom surface; the phase change material layer and the protective layer are sequentially positioned above the central bulge; the phase-change material layer is an antimony-tellurium alloy, the chemical formula is SbxTe100-x, x is larger than or equal to 55 and smaller than or equal to 75, x is atomic percent, and the phase-change material layer has three states of an amorphous phase, a metastable crystal phase and a stable crystal phase. The length L of the phase change material layer is larger than or equal to 0.5 mu m and smaller than or equal to 2 mu m, the reverse optical characteristic of the metastable crystal phase structure of the antimony-tellurium phase change material is utilized, uniform stepping attenuation pulses are adopted to replace the phase change material layer of a traditional rectangular pulse switching device, and conversion between an amorphous phase and a metastable crystal phase can be achieved. According to the invention, the optical contrast window of the phase-change brain-like computing device is effectively expanded, and a large number of continuously adjustable logic state programming is realized.

The application provides a color-adjustable polymer film and a preparation method and application thereof, and belongs to the technical field of functional polymer materials and organic electrochromic technology. Three kinds of electrochromic polymers respectively showing red, green and blue are dissolved in appropriate organic solvents to prepare three kinds of primary color solutions, which are sequentially named as primary color solution (R), primary color solution (G) and primary color solution (B). Two of the three kinds of primary color solutions are blended according to a certain proportion, and are coated on the surface of a substrate to form a wet film. Then, the wet film is finally obtained through heat curing to obtain the color-adjustable polymer film. As the electrochromic material, the film can realize reversible conversion of a variety of colors from transparent to red, green and blue three primary colors obtained by binary blending, and has high optical contrast, fast response time and good cycle stability.

Embodiments described include adhesive bus bars for electrochromic or other optical state changing devices. The bus bars are configured to color match and / or provide minimal optical contrast with their surrounding environment in the optical device, provide better adhesion than ink based bus bars, as well as obviate the need to mitigate defects in underlaying layers.

Mechanical device provided with a first and a second mutually movable mechanical member, a track (1) formed by several optical sections (2) being obtained on the second member. The sections (2) are of two types with different optical contrast, distributed according to a predetermined bit number pseudo-random code. The mechanical device is provided with a sensor (3) comprising several optical transducers (5), spaced with a resolution (R) equal to or less than half the width (L) of a section (2) and arranged for framing a measurement window (6) on the track (1) extended for a number of sections (2) equal to the predetermined bit number and for each generating a measurement signal. Furthermore, the mechanical device comprises an electronic unit, configured for associating, with each section (2) in the measurement window (6), a corresponding group (G) formed by a first and a second optical transducer (5', 5") and by at least a third optical transducer (5"') interposed therebetween. The electronic unit is configured for associating, with the measurement signals of the first, second and third optical transducers (5', 5", 5"') at least a first, a second and a third comparison parameter, respectively. The electronic unit is configured for comparing these parameters in order to identify the coinciding ones and, if most of them are coinciding, to obtain, as a function of their measurement signals, a position binary number having a number of bits equal to the predetermined bit number, in which each bit corresponds to a group (G). Furthermore, the electronic unit is configured for associating the position binary number with a position of the second member.

The application belongs to the technical field of high-reflectivity extreme ultraviolet elements, and provides a La / C / B4C extreme ultraviolet multilayer film mirror and a preparation method thereof.The La / C / B4C extreme ultraviolet multilayer film mirror comprises a primer layer and a multi-period La / C / B4C layer which are sequentially and layerwisely arranged on a substrate; the multi-period La / C / B4C layer comprises a plurality of layerwisely arranged La / C / B4C layers; the La / C / B4C layer comprises a La layer, a C layer and a B4C layer which are sequentially and layerwisely arranged; and the La layer in the La / C / B4C layer is in contact with the primer layer. The application introduces the C layer at the B4C-on-La interface, reduces interface diffusion, improves optical contrast, and further improves the theoretical reflectivity of the La / C / B4C extreme ultraviolet multilayer film mirror.

Relates to the technical field of optical contrast detection, in particular to tumor tissue sample optical contrast detection equipment which comprises a base, an operation table, a preset image film assembly, a transverse moving frame, a horizontal frame, a lifting frame and a ray device. The lateral pressing plate is arranged on the lateral moving plate and coincides with a rear preset image film assembly in a coplanar mode through three-dimensional regulation and control of the transverse moving frame, the horizontal frame and the lifting frame, detection rays emitted by the ray device penetrate through a normal tissue image and then only transmit in a tumor heterotype area to form a lesion mark, and in the detection process, the lateral pressing plate slides from one side to the other side through the lateral moving plate. When the lateral moving plate is in place, the second rotating handle is rotated to generate negative pressure adsorption, the image film is actively tensioned to maintain flatness, and meanwhile, the dust collection roller removes dust on the front surface and the rear surface of the image film in the moving process of the lateral moving plate, so that dust or fibers are prevented from interfering with detection.

The invention discloses a release film production detection method and system, and relates to the field of release film performance detection. Comprising a hardware entity terminal and a software control platform. The microscopic thickness change of silicone oil coating can be clearly captured through high-resolution imaging, the detection sensitivity is ensured, and in addition, the optical contrast ratio of uneven coating is enhanced by adopting a double-light-source scheme (white light and ultraviolet light); 5-degree inclined installation avoids mirror reflection interference and ensures stable image quality; and objective and quantitative defect judgment is realized through FFT (Fast Fourier Transform) frequency domain analysis and a high-frequency energy ratio threshold value in an algorithm level. And in the judgment process, noise suppression (Gaussian filtering) retains key textures, so that misjudgment is avoided. Edge interference is eliminated through ROI extraction, and the analysis accuracy is improved. The influence of uneven illumination is eliminated through gray normalization, and the robustness of the algorithm is enhanced. The problems that in the prior art, a direct detection method or an indirect detection method is not timely in feedback and cannot directly correspond to the coating amount due to interference of various factors are solved.

This invention discloses a highly stable electrochromic thin film, its preparation method, and its applications. The electrochromic thin film comprises a conductive material and an electrochromic layer. The electrochromic layer is a quasi-planar heterojunction metal oxide with a thickness of 10–1000 nm. The preparation method includes the following steps: fixing the conductive material on a sample holder and placing it in an electron beam cavity; pretreating the conductive material; and then using high-energy ion-assisted electron beam evaporation to deposit the metal oxide onto the conductive material, thereby obtaining the electrochromic thin film. This invention, employing the aforementioned highly stable electrochromic thin film, its preparation method, and its applications, overcomes the trade-off between high stability and ultrafast switching performance with the assistance of high-energy ions, exhibiting significant overall electrochromic performance, including high optical contrast, ultrafast switching speed, and excellent stability.