15 results about "Optical stability" patented technology

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

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

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

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

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

The present invention relates to an optical stability transfer device (16), which comprises an interferometer (20) including: an acousto-optic filter (26), configured to receive a reference optical signal (Soref) and at least one target optical signal (So1, So2), to emit a plurality of acoustic signals (Saref, Sa1, Sa2), and to diffract each optical signal to form zero-order reference and target optical signals (Soref(0), So1(0), So2(0)) and first-order reference and target optical signals (Soref(1), So1(1), So2(1)); and an optical coupler (34), configured to combine the optical signals into recombined optical signals (Soref(comb), So1(comb), So2(comb)). The optical stability transfer device (16) also comprises a photodetector (22), configured to convert each recombined optical signal into output electrical signals (Seref, Se1, Se2); and a control unit (24), configured to keep the optical delay (T) of the interferometer (20) constant and to keep the frequency (fo1, fo2) of the or each target optical signal constant.

The application relates to the technical field of optical microscope imaging, and discloses an optical stability evaluation and prediction method based on an improved LSTM model, which realizes accurate evaluation of imaging stability by acquiring imaging data, environmental sensor data and running state data of the optical microscope to be measured and performing multi-source data fusion analysis by using an improved LSTM model. The improved LSTM model can accurately identify the root cause of unstable imaging, significantly improves the accuracy and reliability of the evaluation result, adopts a dynamic weight adjustment strategy and real-time data processing technology, enables the model to quickly respond to environmental changes and equipment state fluctuations, realizes efficient prediction of the imaging stability, solves the problem of poor real-time performance of the traditional method, combines the real-time evaluation and prediction results, further provides an intelligent early warning function, helps researchers to find and solve unstable problems in the imaging process in advance, effectively prevents the imaging quality from being reduced, and reduces experimental uncertainty.

The application relates to preparation and application of a polar fluorescent probe based on triphenylamine-malonitrile, and the structural formula of the probe is: the application provides a preparation method of the fluorescent probe synthesized by taking 5-[4-[bis[4-methoxyphenyl]amino]phenyl]thiophene-2-methyl formaldehyde and 2-[3-cyano-4,5,5-trimethyl furan-2-ylidene]malonitrile as raw materials; the fluorescent probe is a near-infrared polar fluorescent probe with high sensitivity, high selectivity and wide response range; firstly, the fluorescent probe has good sensitivity to the fluorescence response of system polarity change; secondly, the fluorescent probe is not interfered by various cations, anions and biological thiols, and only shows good selectivity to polarity; and the fluorescent probe basically keeps constant in 120 min in pure water and 99% 1,4-dioxane solution, which shows that the fluorescent probe has excellent optical stability; in addition, the fluorescent probe can be applied to the detection of polarity in living cells.

This invention discloses a submicron-thickness waveplate based on niobium oxychloride and its polarization modulation measurement method, belonging to the field of polarization optics. The waveplate preparation method includes: cleaning and drying a silicon wafer; mechanically peeling off a bulk NbOCl2 sample using adhesive tape to form a thin NbOCl2 sample on the blue tape; attaching PDMS to the NbOCl2 sample area on the blue tape, then peeling it off to allow the NbOCl2 sample to adhere to the PDMS; attaching the PDMS with the NbOCl2 sample to the surface of the silicon wafer and heating it; and finally removing the PDMS to obtain the NbOCl2 waveplate on the silicon wafer. The obtained waveplate is subjected to polarization response testing and control analysis using a polarization modulation device, which can systematically obtain its modulation characteristics and phase delay behavior for different incident polarization directions. This invention's preparation method is simple to operate, has high device compatibility, good optical stability and scalability, and can be widely used in multifunctional photonic devices, photoelectric detection, polarization imaging, and on-chip integrated optical paths.

The present invention relates to quantum dots comprising a core / shell structure. The quantum dots of the present disclosure form a compositional gradient between a core and a shell to enhance interfacial stability, to suppress defect-induced emission, and to provide high-efficiency and high-color purity emission characteristics through adjustment of an emission center wavelength and a reduction in an emission linewidth (FWHM). In addition, the present invention provides a high-performance light-emitting material that maintains optical stability of quantum dots for a long time through a protective effect of the outer shell and is suitable for various application fields such as displays, lighting, and bioimaging.

The application discloses a shrink film and a preparation method thereof, and relates to the technical field of shrink films. The shrink film comprises a plurality of first polyethylene layers, a first ethylene / vinyl acetate layer arranged on the polyethylene layer, a polyvinylidene chloride layer arranged on the first ethylene / vinyl acetate layer away from the polyethylene layer, a second ethylene / vinyl acetate layer arranged on the polyvinylidene chloride layer away from the first ethylene / vinyl acetate layer, and a mixed functional layer arranged on the second ethylene / vinyl acetate layer away from the polyvinylidene chloride layer. The application solves the problem that the blue compensation scheme in the prior art is mostly added by manual experience, cannot be dynamically adjusted in real time according to the color change of the film body, is prone to cause local color difference, transparency fluctuation and haze increase, and is difficult to meet the requirements of high-end transparent packaging on color consistency and optical stability.

This invention discloses a beam splitter structure, including a lens with reflective films on both sides and multiple oblique apertures on the lens. When the lens is placed vertically, the angle between the axis of the oblique aperture and the surface of the lens is α. During operation, the beam splitter is placed at an angle of 90°-α to the horizontal plane. This invention employs a manufacturing method of integral coating on both sides of the lens and directly creating oblique apertures. The integral coating process of this solution is mature and has a high yield. The oblique apertures can be quickly processed using mature processes such as laser drilling and mechanical drilling, eliminating the need for complex customized coating procedures. This significantly simplifies the processing flow, shortens the production cycle, and greatly reduces manufacturing costs. The integrally coated reflective film layer has stable reflectivity; the axis of the oblique aperture is parallel to the incident light direction, and the light propagates along the aperture axis, reducing scattering and stray light from the aperture walls; the beam splitting accuracy is high, and stray light is low, making it suitable for optical path systems with high optical stability requirements.

This invention provides a modified fluorophlogopite powder and its preparation method, as well as a silvery-white mica titanium pearlescent pigment and its preparation method and applications, relating to the field of inorganic pigment technology. The preparation method of the modified fluorophlogopite powder provided by this invention includes the following steps: sequentially subjecting the fluorophlogopite powder to calcination activation, alkali activation, acid activation, water washing, and drying to obtain the modified fluorophlogopite powder. This invention also provides a silvery-white mica titanium pearlescent pigment, comprising the modified fluorophlogopite powder and a rutile titanium dioxide layer coating the modified fluorophlogopite powder. This invention uses the modified fluorophlogopite powder as a substrate and coats its surface with a rutile titanium dioxide layer, forming a silvery-white mica titanium pearlescent pigment with excellent high-temperature stability. It can maintain the integrity of its layered structure and the optical stability of the coating layer above 1000℃, showing great application potential in high-temperature fields such as ceramics.