12 results about "Continuous irradiation" patented technology

This invention discloses a low-energy laser pretreatment method for enhancing the paracrine function of mesenchymal stem cells. Specifically, the method includes irradiating human umbilical cord mesenchymal stem cells with an 808nm laser. The irradiation parameters are: output power density, irradiation time of 60-120 s per irradiation, continuous irradiation of cells for 3 days, and irradiation twice a day.

This application discloses a laser protective plate and its preparation method. The provided laser protective plate includes a substrate layer and a reflective layer disposed on at least one side of the substrate layer; wherein, the substrate layer contains a substrate and a composite absorber and a silane coupling agent modified heat dissipation agent uniformly dispersed in the substrate; the reflective layer contains a distributed Bragg reflective film formed by alternating deposition of high-refractive-index materials and low-refractive-index materials. The provided laser protective plate, through a photothermal low-temperature synergistic design, achieves an OD value greater than or equal to 8 at both 532nm and 1064nm wavelengths on a plastic substrate, with a visible light transmittance ≥50%; the plate shows no perforation under continuous irradiation with a 1kW-level laser for 60 seconds. It can be widely used in industrial, medical, and military fields.

This invention relates to the field of ultraviolet (UV) light modification technology for biomass precursors, and particularly to a continuous UV irradiation device and method for biomass precursor modification. The device includes a reactor comprising a cylindrical body, conveying spiral blades, a spiral drive support plate, an internal light source, external light sources, and a conveying motor driving the conveying spiral blades. The conveying motor is fixedly mounted at the end of the cylindrical body. The spiral drive support plate is rotatably mounted inside the cylindrical body and is connected to the conveying motor. The conveying spiral blades are fixedly mounted on the spiral drive support plate. The internal light source is fixedly mounted on the central axis of the cylindrical body and extends axially. Multiple external light sources are fixedly mounted on the outer side walls of the cylindrical body and extend axially. This method effectively reduces the irradiation dead zones present in traditional static stacking methods, significantly improves modification uniformity and reaction sufficiency, and simultaneously enables continuous biomass modification production, meeting the capacity requirements of industrial mass production.

The present invention provides a laser processing apparatus, a microscope apparatus, and a laser processing method that can suppress the deterioration of the quality of the processed cross-section. [Solution] The laser processing apparatus 20 includes a polarization adjustment unit 45 that adjusts the polarization direction of the laser light L3 so that the laser light L4 includes a first component C1 in a first polarization direction P1 and a second component C2 in a second polarization direction P2; a spatial light modulator 46 that modulates the first component C1 of the laser light L4 emitted from the polarization adjustment unit 45 and emits it as modulated light Lm, and emits the second component C2 of the laser light L4 as unmodulated light Ln; a ​​lens 49 that focuses the modulated light Lm and unmodulated light Ln emitted from the spatial light modulator 46 toward the sample A to form a single continuous irradiation region R on the sample A that includes the modulated light Lm and the unmodulated light Ln; and a galvanometer mirror 48 for scanning the irradiation region R with respect to the sample A.

This invention discloses a perovskite quantum dot composite film and its preparation method. The raw materials for preparing the composite film include a perovskite quantum dot dispersion, lauryl methacrylate, zinc undecanoate, methacryloyloxyethyl phosphate, polyurethane acrylate oligomer, mercapto monomer, and a photoinitiator. The preparation process includes: ligand exchange between zinc undecanoate and the quantum dot dispersion; addition of lauryl methacrylate and removal of the original solvent under reduced pressure; subsequent addition of the remaining components for degassing and mixing; coating a wet film; and curing by dual-band continuous irradiation. This invention utilizes zinc undecanoate as a bridge, enabling its terminal double bonds to undergo cross-linking reactions with the matrix resin, thus covalently anchoring the quantum dots in situ within the polymer network. This reduces the spatial migration and aggregation of quantum dots, helping to delay the degradation of the optical properties of the composite film.

The application relates to a preparation method and application of a metal-organic framework (MOFs) material with photochromic and long persistent luminescence (LPL) characteristics. Specifically, X-MOFs (X=Cl, Br) are prepared by high-temperature self-assembly of ligand 1,1'- (6-hydroxy-1,3,5-triazine-2,4-diyl) bis (pyridine-4 (1H)-ketone) and CdCl2.2.5H2O and CdBr2. Research finds that, under the continuous irradiation of ultraviolet light, the X-MOFs realize photochromic behavior from yellow to gray. In addition, after the removal of different excitation light sources, the X-MOFs exhibit multicolor LPL which is dependent on excitation, temperature and time evolution. The X-MOFs material synthesized by the application provides potential application value in the fields of data encryption and anti-fake patterns.

This invention belongs to the field of biodetection and medical technology, and relates to a high-performance photothermal diagnostic and therapeutic integrated fiber optic probe based on rare-earth nanomaterials. The probe includes a photothermal diagnostic and therapeutic composite material. This material consists of a tumor-specific environmental fluorescence responsive material, 1,8-naphthalimide fluorophore, and Yb that can be used for photothermal therapy. 3+ / Er 3+ The probe is composed of co-doped Bi₂WO₆ nanomaterials. Under 450nm laser excitation, the fluorescently responsive material in the probe emits 550nm green fluorescence in a tumor cell environment, which is received and fed back by the fiber optic probe, enabling specific recognition of tumor cells. After recognition, the fiber optic probe emits fluorescence that can be detected by Yb 3+ / Er 3+ The co-doped Bi₂WO₆ nanomaterials absorb and convert infrared light in the 980nm near-infrared band into photothermal radiation. Under continuous irradiation, the nanomaterials continuously heat up, destroying cell structures and killing tumor cells, thus achieving targeted photothermal monitoring and treatment of tumor cells. This probe is minimally invasive and has high photothermal conversion efficiency, providing a new approach for minimally invasive diagnosis and treatment of early-stage tumors.

The application discloses a laser processing method of a group III nitride micro-nano structure and a light-emitting device, and the method comprises the following steps: S1, providing a group III nitride micro-nano structure, wherein the group III nitride micro-nano structure comprises a group III nitride thin film and a group III nitride nanowire array structure on the group III nitride thin film; and S2, continuously irradiating the group III nitride nanowire array structure by using an ultrafast femtosecond laser to improve the light-emitting performance of the group III nitride micro-nano structure. The continuous irradiation of the ultrafast femtosecond laser can improve the crystal quality of the group III nitride material, improve the light-emitting performance of the group III nitride material, and make the light-emitting intensity irreversibly enhanced. The application has the characteristics of low cost, simple operation and precise selected area irradiation, and can be applied to light-emitting devices such as Micro-LED and Nano-LED.

The present application provides a kind of surface light source projection device, comprising: light emitting module and diffraction optical component module. Wherein, the diffraction optical component module has two micron diffraction layers, the multiple micron diffraction layers contain multiple micron structures, the shape of the multiple micron structures is set as conical, discoid or the combination of the above shape, the multiple micron structures have an outer diameter, and the outer diameter of the multiple micron structures is between 5 times and 200 times of the narrow half-wave width of the incident wavelength of the light beam output by the light emitting module. Therefore, a surface light source projection device with heat accumulation generated after high-energy laser continuous irradiation is provided, to facilitate long-time irradiation and long-distance sensing surface light source projection device.

The application provides a perovskite non-invasive blood glucose detection sensor based on a photoelectric plethysmography, when the light absorption layer of the sensor is subjected to light radiation, absorbs photons to generate excitons, and diffuses to the metal electrode and the glass electrode on the two sides to form a potential difference, through the potential difference, a closed loop is formed in the sensor to further perform blood glucose detection and analysis. In the traditional lead-based perovskite, SnI2 is doped in the same proportion as PbI2 to reduce the band gap; at the same time, a protective layer is added between the light absorption layer and the transmission layer, which can not only passivate the perovskite and reduce the surface non-radiation recombination loss, but also can isolate the invasion of external water and oxygen due to the smooth film, large crystal grains and complete coverage of the perovskite light absorption layer, so as to serve as a self-sealing layer. The sensor has strong stability, can still maintain excellent photoelectric properties under atmospheric environment and high light intensity continuous irradiation, is more sensitive, accurate and scientific compared with the existing blood glucose detection.

This invention relates to the field of gemstone irradiation processing technology and discloses a tooling for continuous gemstone irradiation processing, including a support frame, a loading box, an irradiation mechanism, and a lifting and rotating mechanism. Both the irradiation mechanism and the lifting and rotating mechanism are mounted on the support frame. The loading box is mounted on the execution end of the lifting and rotating mechanism, which drives the loading box to lift and rotate. A conveyor belt is installed on the support frame. Multiple clamping plates are arranged inside the loading box, with multiple arc-shaped cuts at the edges of the clamping plates. A driving component is also arranged inside the loading box to drive the multiple clamping plates to move towards each other along the width direction of the loading box. This invention, through the cooperation of the clamping plates and anti-slip pads, clamps and fixes the gemstones in adjacent clamping plates, enabling the gemstones to be arranged in a uniform array, avoiding problems such as stacking, obstruction, and uneven density. This ensures that each gemstone receives highly consistent irradiation energy, resulting in uniform color change and minimal color difference, significantly improving the quality stability and consistency of gemstone irradiation color change.