21 results about "Visible band" patented technology

The invention relates to the technical field of carbon detection, in particular to an online real-time dynamic detection method for the carbon content of converter steelmaking molten steel, which comprises the following steps: acquiring multi-source sensing data, and acquiring a molten steel surface temperature image acquired by a thermal infrared imager; acquiring multiband spectral data, namely controlling a visible band sensor to acquire radiation intensity in a range of 500-600nm, and controlling a near-infrared band sensor to acquire reflectivity characteristics in a range of 850-1100nm; analyzing and fusing the data, analyzing the temperature image, and generating a molten pool two-dimensional temperature field; analyzing the multiband spectral data, and extracting a spectral feature vector related to the carbon content; fusing the two-dimensional temperature field and the spectral feature vector, and generating a molten steel surface carbon content distribution diagram based on a pre-trained carbon content machine learning model; and outputting an optimized detection result, processing multi-node data through a distributed computing framework, and outputting a dynamic carbon content detection report. According to the invention, the effects of breaking through the limitation of traditional static detection, real-time component monitoring, full molten pool covering and dynamic feedback are achieved.

The invention discloses a self-reference three-phase polarization imaging system and method based on an integrated photon neural network, and the method comprises the steps: setting a fixed phase difference in a silicon-based photon chip to achieve three-phase projection and single-port reading, outputting a three-phase interference signal at the same time, obtaining all phase and polarization information in one-time imaging to achieve full-polarization measurement, and carrying out the single-port reading of the silicon-based photon chip; according to the invention, the effective resolution ratio is consistent with that of an original detection array, power and temperature drift is eliminated, single-frame acquisition has no time sequence error and motion artifact, a stable and compact single-port self-reference reading mode is realized through a three-phase interference measurement architecture constructed on a chip in combination with channel normalization and rotation correction, and complete Stokes parameters and polarization information can be measured. According to the system provided by the invention, the MZI is adopted, so that the phase bias can be flexibly adjusted, and different bandwidth requirements can be met by adjusting an interference path. The silicon-based photon platform has a broadband response characteristic and can cover a visible wave band, so that the device can keep stable interference performance in a communication wave band.

The application discloses a kind of visible band tunable femtosecond pulse laser generation device, including input side single-mode optical fiber jumper component, visible light frequency comb generation module, collimating lens, tunable filter module, focusing lens and output side single-mode optical fiber jumper component in turn along laser light path, visible light frequency comb generation module includes germanium core optical fiber, germanium core optical fiber is tapered optical fiber, including core and cladding, core is SiO2 core of GeO2 doping concentration 98mol.%, cladding is SiO2 cladding, the input end of germanium core optical fiber is fused with the output end of input side single-mode optical fiber jumper component.The device has high integration, and through the structure of all-fiber realizes integrated all-fiber and tunable stable, accurate single-wavelength femtosecond pulse laser output, does not need to adjust optical path frequently to complete coupling in use process, saves manpower and material resources, and the laser generator structure is small and exquisite, compatibility is good, and it is convenient to be applied in large-scale complex optical system.

The invention discloses a visible-infrared image fusion detector structure and a preparation method thereof. The detector structure comprises a substrate, a visible light absorption layer, an infrared light absorption layer, a metal electrode layer and a protection layer from bottom to top. The structure monolithic integrates a visible light detector and an infrared detector. P-type and N-type doping of the same semiconductor material is realized by regulating and controlling the number of atomic layers (or the thickness of the material) by utilizing the self-doping effect of the number of atomic layers of the two-dimensional semiconductor, so that regulation and control of an electric field built in a heterojunction and a photon-generated carrier transport process are realized through energy band engineering. In combination with a differential mechanism of a spatial domain current signal, detection and imaging of an independent visible band (450-700 nanometers) and an independent infrared band (1.5-4 microns) are realized in a single device. The planar heterojunction detector does not need a complex optical system and a bias circuit, the preparation process is simple, and a novel device design scheme is provided for visible-infrared image fusion detection.

An AlO x A method for preparing an Al2O3 low-reflection, etch-resistant composite coating includes the following steps: In a first chamber, the surface of a substrate is cleaned by ion bombardment; in a second chamber, argon and oxygen are introduced, and at least one layer of Al2O3 is deposited on the surface of the substrate using pulsed DC magnetron sputtering. x Layer; containing AlO x The substrate of the layer is fed into the third chamber, argon and oxygen are introduced, and AlO is sputtered using pulsed DC magnetron sputtering. x An Al2O3 layer is deposited on the surface of the layer and cooled in the furnace to obtain AlO. x - Al2O3 low-reflection, etching-resistant composite coating. This invention constructs a non-stoichiometric Al2O3 composite coating within the composite coating. x A gradient structure of oxygen content gradually transitioning from a layer to a dense Al2O3 layer, with low oxygen content AlO2O3. x The layer has a high oxygen vacancy concentration and low reflectivity, which can effectively reduce the reflection intensity in the ultraviolet-visible band. The dense Al2O3 layer formed on the surface has good structural stability and chemical inertness, thus significantly improving the etching resistance of the coating in the plasma etching environment.

The application provides a visible band photonic spin Hall device based on a plasmonic metasurface, which comprises: an anisotropic metasurface, which is designed based on a PB geometric phase principle and is formed by periodic arrangement of supercells; the supercells are arranged by homochiral superatoms every interval p and rotation angle by turns, so that the last superatom of each supercell rotates 180 DEG relative to the first superatom; the superatom is a half-wave plate working in a wide frequency visible light band, that is, when left-handed or right-handed circularly polarized light is incident on the superatom, the reflected light is converted into right-handed or left-handed circularly polarized light; under parallel circularly polarized light incidence, the reflected circularly polarized light of the metasurface device follows the generalized Snell law, and left-handed light and right-handed light are reflected towards opposite directions respectively, that is, a photonic spin Hall effect is generated.

The invention discloses a preparation method and application of a wafer-level palladium ditelluride-palladium diselenide vertical heterojunction thin film for a nonlinear saturable absorber. The structure of the material sequentially comprises a palladium ditelluride thin film and a palladium diselenide thin film from top to bottom, and the wafer-level two-dimensional palladium ditelluride-palladium diselenide thin film vertical heterojunction is prepared by adopting a chemical vapor deposition technology assisted by electron beam evaporation coating. Experimental results show that the nonlinear absorption performance of the obtained heterojunction thin film is superior to that of a single palladium ditelluride thin film in a visible wave band of 550 nm; in the near-infrared band of 1550 nm, the modulation depth can reach 31.92%, and the wide-spectrum response characteristic from the visible band to the near-infrared band is shown. The material obtained by the invention has the advantages of controllable wafer-level growth, excellent nonlinear performance, wide operating wavelength range and the like, provides important material strategy and theoretical support for the design of ultrafast photonic devices such as high-performance mode-locked lasers and all-optical switches, and has important application value.

The invention discloses a three-band common-caliber satellite-borne optical imaging system, relates to the technical field of satellite-borne multispectral optical imaging, and solves the problems that true color imaging and fusion comparison of visible light and infrared information cannot be realized in the prior art. The system is composed of a primary mirror, a secondary mirror, a visible light band system, a medium-wave infrared band system and a long-wave infrared band system which are sequentially arranged on an optical axis. The first beam splitter prism divides the light reflected by the secondary mirror into two paths, and one path is focused on a visible band detector for imaging through a visible band compensating mirror group; the other path is divided into two paths through a second beam splitter prism, and one path is focused on a medium-wave infrared band detector through a reflector, a medium-wave infrared band compensating mirror group and a medium-wave infrared band cold diaphragm; and the other path is focused on a long-wave infrared band detector through a long-wave infrared band compensation mirror group and a long-wave infrared band cold diaphragm. While the imaging performance of each wave band is ensured, the manufacturing cost, the size and the weight of the system are remarkably reduced, and the system is more suitable for aerospace application scenes.

This invention discloses a nitride single-transverse-mode dual-pass racetrack-shaped microring waveguide for the external cavity of a visible-light FP laser. It employs an AlN ridge waveguide system or a GaN strip waveguide system, achieving low-loss transmission of a single transverse mode in the visible-light band through precise control of waveguide cross-sectional parameters. The waveguide structure consists of two main straight waveguides and a racetrack-shaped microring waveguide forming a dual-pass coupling structure. The main waveguides are equally spaced on both sides of the microring straight track, forming three ports: input, pass-through, and download. This invention utilizes the dual-pass structure to feed back specific mode optical signals into the FP laser cavity, achieving self-injection locking and spectral purification. This invention features rigorous design logic and a compact structure, possessing significant monolithic integration application value in the fields of laser displays and precision atomic clocks.

Techniques for fluorescence imaging are provided. A tissue region comprising a target fluorophore is illuminated with an excitation light in a wavelength range of 380-490 nm. First image data of the tissue is captured at an image sensor, wherein the first image comprises an autofluorescence contribution from the tissue and a fluorescence emission contribution from the target fluorophore, wherein the first image data comprises red channel data and green channel data. A corrected fluorescence image is generated, based on the first image data, wherein generating the fluorescence image comprises subtracting a second component based on one of the green channel data or the red channel data from a first component based on the other of the green channel data or the red channel data.

A kind of water color three-element quantitative analysis method and system of UV-visible absorption and reflection spectrum coupling, comprising: obtaining the reflection signal of multiple sample water bodies, and calculating reflectivity based on the reflection signal;Obtain the total absorption spectrum of each sample water body in ultraviolet-visible band and the absorption spectrum and concentration of each component of water color three-element;Based on the reflectivity and total absorption spectrum of each sample water body, the total absorption spectrum inversion model of water body is constructed;Based on the absorption spectrum characteristics of each component in sample water body, the water color three-element absorption spectrum separation and concentration inversion model is constructed;The reflection signal of the water body to be measured is obtained, the total absorption spectrum of the water body to be measured is obtained based on the total absorption spectrum inversion model of water body, and the water color three-element absorption spectrum separation and concentration inversion of the water body to be measured are realized using water color three-element absorption spectrum and concentration inversion model.The present application overcomes the problem that CDOM and NAP visible band absorption spectrum is difficult to separate, and can realize high-precision remote sensing observation of water color three-element concentration.

Techniques for fluorescence imaging are provided. A tissue region comprising a target fluorophore is illuminated with an excitation light in a wavelength range of 380-490 nm. First image data of the tissue is captured at an image sensor, wherein the first image comprises an autofluorescence contribution from the tissue and a fluorescence emission contribution from the target fluorophore, wherein the first image data comprises red channel data and green channel data. A corrected fluorescence image is generated, based on the first image data, wherein generating the fluorescence image comprises subtracting a second component based on one of the green channel data or the red channel data from a first component based on the other of the green channel data or the red channel data.

The application discloses a near-infrared fluorescent powder, a preparation method and application thereof, and has a chemical general formula of Ba5La3Mg 1‑x MO 15 :Cr x ; wherein M is Al and / or Ga; 0.001<=x<=0.07, the near-infrared fluorescent powder has a brand-new crystal structure, takes Cr 3+ as an activator, the fluorescent powder can be excited by light in a wavelength range of 350-800 nm to emit near-infrared light with a peak wavelength in a range of 700-1400 nm, so that the near-infrared fluorescent powder can absorb light in the ultraviolet and visible bands to be converted into near-infrared light. Meanwhile, the near-infrared fluorescent powder has the advantages of simple preparation method, stable chemical performance, high efficiency and being beneficial to industrial production, and shows an application prospect in NIR-LED (infrared light-emitting diode) devices, and can be used as a high-efficiency, heat-stable broadband NIR-LED light source, and shows practical potential in night vision and nondestructive testing.

The novel visible wave band multi-wavelength laser comprises a machine body, a pumping source, a total reflection lens, a neodymium-doped yttrium vanadate crystal, a Q switch, a middle lens, a first BBO crystal, a second BBO crystal and an output lens are sequentially arranged in the machine body, and the total reflection lens and the output lens form an oscillation cavity. The axial center lines of the pumping source, the total reflection lens, the neodymium-doped yttrium vanadate crystal, the Q switch, the middle lens, the first BBO crystal, the second BBO crystal and the output lens are overlapped, a horizontal rotation adjusting table is arranged at the lower end of the first BBO crystal, a fixed platform is arranged at the lower end of the second BBO crystal, and the first BBO crystal is rotated through fine tuning to adjust the axial center lines of the neodymium-doped yttrium vanadate crystal, the Q switch and the middle lens. And the light passing direction of the first BBO crystal is consistent with the phase matching angle required by the output of the corresponding wavelength, so that the frequency mixing of the corresponding fundamental frequency light or each order of Stokes light in the laser resonant cavity is selectively realized, and the visible band laser with different wavelengths is correspondingly output. The technical scheme is reasonable in structural design, high in laser efficiency, stable in output and good in practicability.

The invention relates to the technical field of optical fiber spectrometers, and discloses a transmission-type broadband optical fiber spectrometer device for experiments and a measurement method, and the device comprises a defocus lens which is used for aligning with the same detection area to be measured so as to receive light from the detection area and converge the light, the defocus lens is set to be in a defocus state, and the defocus lens is used for receiving the light from the detection area; the defocused spot generated by the out-of-focus lens has a preset size; the surface of the front end of the rod-shaped optical waveguide is arranged in the defocused spot area of the defocused lens, and the rod-shaped optical waveguide is used for receiving the mixed optical signals from the defocused lens, homogenizing the mixed optical signals in the rod-shaped optical waveguide and then transmitting the homogenized mixed optical signals to the surface of the rear end of the rod-shaped optical waveguide; and the spectrum acquisition module comprises at least three optical fiber receiving ends which cover an ultraviolet band, a visible band and a near-infrared band in a spectral response range, and the optical fiber receiving ends are arranged on the surface of the rear end of the rod-shaped optical waveguide in a manner of being close to each other in space and are used for receiving the homogenized optical signals and performing spectral measurement in different bands.

The embodiment of the invention discloses wavelength division imaging equipment and an image registration following method. According to one specific embodiment, the wavelength division imaging device comprises a visible light camera, an infrared camera, a dichroscope, a wide spectrum window and a mechanical shell, and one side of the mechanical shell comprises a light inlet; the visible light camera is mounted on one side in the mechanical shell, comprises a visible light imaging lens and is used for receiving a visible wave band and carrying out visible light imaging; the infrared camera is mounted on the other side of the interior of the mechanical shell, comprises an infrared lens and is used for receiving an infrared band and performing infrared imaging; the wide spectrum window is installed at a light inlet included in the mechanical shell and used for preventing dust and rainwater from entering the mechanical shell. The dichroscope is installed in the mechanical shell and used for reflecting infrared band light and transmitting visible band light. According to the embodiment, the situation of view angle difference caused by multi-band lens superposition imaging is avoided.

An organic light-emitting diode and a display device using the same are provided. An organic light-emitting diode includes: a hole injection layer, a hole transport layer on the hole injection layer, a first emission layer configured to generate light of a short wavelength in a visible band, the first emission layer being on the hole transport layer, wherein one or more of the hole injection layer and the hole transport layer includes a phosphorescent dopant material at an interface between the hole injection layer and the hole transport layer.

Devices and methods are disclosed for enhancing drying, dehumidifying, cooling, dehydrating, and evaporating processes by harnessing direct, non-thermal photon-induced removal of liquid molecules from a surface. Each apparatus integrates a configurable photon-emitting module (LED, laser, or array) that delivers predominantly TM-polarized light in the visible band (e.g., 495 nm-570 nm) at an incidence configured to approximate the Brewster angle, such as within ±5° of the Brewster angle. Placement of these light sources, together with light-permeable or patterned surfaces, maximizes the normal electric-field component at the interface and enlarges the illuminated area, thereby enhancing cluster ejection and vapor formation while minimizing bulk heating. Representative embodiments include a regenerating desiccator, clothes dryer, solvent extractor, indirect and direct evaporative coolers, food dehydrator, and a valveless microfluidic pump. Integrated control units modulate wavelength, pulse width, incidence geometry, airflow, and ancillary actuators in real time to match load and environmental conditions.

Devices and methods are disclosed for enhancing drying, dehumidifying, cooling, dehydrating, and evaporating processes by harnessing direct, non-thermal photon-induced removal of liquid molecules from a surface. Each apparatus integrates a configurable photon-emitting module (LED, laser, or array) that delivers predominantly TM-polarized light in the visible band (e.g., 495 nm – 570 nm) at an incidence configured to approximate the Brewster angle, such as within ±5 ° of the Brewster angle. Placement of these light sources, together with light-permeable or patterned surfaces, maximizes the normal electric-field component at the interface and enlarges the illuminated area, thereby enhancing cluster ejection and vapor formation while minimizing bulk heating. Representative embodiments include a regenerating desiccator, clothes dryer, solvent extractor, indirect and direct evaporative coolers, food dehydrator, and a valveless microfluidic pump. Integrated control units modulate wavelength, pulse width, incidence geometry, airflow, and ancillary actuators in real time to match load and environmental conditions.

The invention provides a method and a system for realizing variable wavelength correlated imaging based on a thermal light source. The method comprises the following steps: firstly, generating a first light beam and a second light beam which are orthogonal in polarization, and combining the first light beam and the second light beam; then, the combined light is subjected to a second harmonic generation effect under the II-type phase matching condition, and part of infrared photons are coherently converted into visible photons, so that cross-wavelength intensity correlation between infrared and visible wavebands is established; separating infrared fundamental frequency light and visible frequency doubling light, and respectively detecting the infrared fundamental frequency light and the visible frequency doubling light; and finally, carrying out intensity correlation calculation on the two paths of signals, and inverting and reconstructing an infrared image of a target. According to the method, coherent transfer of intensity correlation is realized through a physical nonlinear process, and the problem of mismatching of double-color speckles is fundamentally solved; based on a classic thermal light source, quantum entanglement is not needed, and the system is stable and simple; the imaging quality can be optimized by regulating and controlling the coherence length of the light source, the flexibility is high, and the method has wide application prospects in the fields of infrared remote sensing, biological imaging, safety monitoring and the like.