92 results about "Visible infrared" patented technology

A 100-meter gridded spatialization method for carbon emissions of different land use types based on multi-source heterogeneous data is provided, including the following steps: S1, fitting Luojia-1A Satellite nighttime light data year by year with defense meteorological satellite program-operational linescan system (DMSP-OLS) and national polar-orbiting partnership-visible infrared imaging radiometer (NPP-VIIRS) fused 1-kilometer gridded nighttime light data, performing additive fusion on previous light data and current light data, introducing a time inertia weight factor to improve particle swarm optimization-back propagation (BP) neural network algorithm, and forming 100-meter nighttime light data correctable on a long time series; and S2, simulating a complex nonlinear dynamic changing relationship between multilevel 100-meter gridded data of different land use types in different industries and energy carbon emissions in different industries based on the 100-meter nighttime light data, and establishing a 100-meter spatialization inversion model for energy carbon emissions of different land use types in different industries.

The invention discloses a visible infrared dual-band stealth material and a preparation method thereof. The material structurally comprises a metal Mo layer, a Ge dielectric layer and an Al2O3 dielectric layer, and the metal Mo layer, the Ge dielectric layer and the Al2O3 dielectric layer are sequentially laid from bottom to top. According to the method, the absorptivity, the refractive index and the transmittance of the thin film structure in visible light and infrared bands are calculated through combination of a transmission matrix and simulation software, and simulated absorption spectrums of the thin film structure in the visible light and infrared bands under the normal incidence condition are obtained; by changing the thickness of each layer of material in the thin film structure, different thickness absorption spectrums of the thin film structure in visible light and infrared bands are obtained through calculation; comparing the different thickness absorption spectrums with the simulated absorption spectrums to obtain an optimal thin film structure and the thickness of each layer of material; and according to the thickness of each layer of material of the optimal thin film structure, a target thin film structure is prepared by setting a preparation mode. The structure is simple, the manufacturing process is simplified, and preparation and large-scale integration are easy.

The invention relates to the field of re-recognition model processing, and discloses a re-recognition model training method and system based on a multi-mode collaborative learning framework, and the method comprises the steps: generating visible light text semantic information and infrared light text semantic information based on a pre-trained CLIP model; performing dynamic contrast learning based on a sample input into the visible-infrared pedestrian re-recognition model to obtain a dynamic contrast loss function; calculating the text contrast loss of the visible light image, calculating the text contrast loss of the infrared light image, and constructing a contrast loss function from the image to the text according to the text contrast loss of the visible light image and the text contrast loss of the infrared light image; training a visible-infrared pedestrian re-recognition model by using the dynamic comparison loss function and the image-to-text comparison loss function; according to the method, the problem that the existing visible-infrared pedestrian re-recognition training cannot fully capture the semantic relationship between samples and is easily influenced by noise is solved.

The invention relates to the technical field of sports biomechanics, in particular to an automatic track and field action recognition and capture method based on image data, which comprises the following steps: synchronizing a visible infrared image, a polarization image and an event stream according to a mutual information criterion and generating a polarization phase diagram; inputting a polarized neural radiation field network and a skeleton graph neural network based on Lie group message passing, and alternately optimizing to obtain a continuous voxel light field and a joint rotation sequence; performing Vietoris-Rips persistent homology and third-order path signature on the sequence to extract topological path features, encoding the topological path features into a pulse sequence to drive a liquid state machine, and generating a semantic confidence flow by combining bone potential tensor and action text embedding; and constructing a saliency curve by using the voxel light field time derivative, the neuromorphic difference, the semantic complementary value and the skeleton difference, carrying out strategy gradient on-line adjustment on the weight, taking curve minimum mapping as a key frame index, and outputting an image frame. The track and field action key frames can still be accurately captured in real time under complex illumination and shielding conditions.

The invention relates to an ultraviolet-visible-infrared tri-spectral image adaptive fusion method, which comprises the following steps: acquiring a tri-spectral image of high-voltage equipment as an original image, and preprocessing to obtain a preprocessed image; constructing a feature extraction calculation network to obtain feature vectors of the three-spectrum image; calculating the contribution weight of each image in the fusion result; and carrying out multi-scale weighted fusion on the three-spectrum image, and carrying out post-processing on the final fused image. According to the method, the information integrity and accuracy are remarkably improved, the characteristics of a target under different spectrums can be obtained, the problem that information of a single spectrum is one-sided is solved, and tiny flaws which are difficult to distinguish by naked eyes and are fuzzy in thermal imaging can be accurately positioned in industrial defect detection; the imaging of the visible light spectrum is limited in a severe environment, and the ultraviolet and infrared spectrums can still work in low-light, smog, haze and other scenes; after fusion, the system can stably acquire images in a complex environment.

The invention discloses a variable array type piping detection radar device, a piping monitoring device and an identification method. Comprising a radar support which is adjustable in a longitudinal-transverse three-level mode, 16 radar units are distributed in a 4 * 4 matrix mode, an edge calculation module is integrated to achieve local noise reduction and preprocessing of signals, the device is carried on a self-propelled platform, and a multi-mode monitoring system is constructed by combining a visible infrared double-spectrum probe of an acoustic-optical-electric integrated mast, a voiceprint recognition module and a Beidou positioning system. According to the monitoring method, day and night monitoring weight is dynamically adjusted, bidirectional LSTM is combined with an attention mechanism to extract features, noise robustness is optimized through adversarial training, and piping risk factor fusion calculation is achieved. According to the invention, a closed-loop monitoring system with environment self-adaption, signal multi-source perception and intelligent decision is constructed, and high-efficiency and high-precision monitoring and early warning of piping are realized; and comprehensive breakthrough is realized on core indexes such as positioning precision, identification accuracy and environmental adaptability.

The invention relates to the technical field of electrochromic materials, in particular to a long-life electrochromic intelligent window and a preparation method thereof. Comprising a conductive substrate and an electrochromic device, the electrochromic device is arranged above the conductive substrate and comprises a transparent conductive film, an anode electrochromic film, a cathode electrochromic film and an electrolyte layer, and a plurality of layers of visible near-infrared anti-reflection infrared high-emission multilayer films are arranged above the electrochromic device. According to the structure, the optical regulation and control amplitude of the electrochromic device can be increased, visible infrared rays, near infrared rays and middle and far infrared rays are effectively blocked, the temperature of the colored electrochromic device is reduced, and the service life of the electrochromic intelligent window is prolonged.

The invention discloses a determination method, an application method and a product of a dairy cow limb and hoof performance abnormity identification model, and relates to the technical field of image identification and livestock breeding, and the method comprises the steps: obtaining a dairy cow walking image, a visible-infrared light image of a cow hoof part, and integrated data; the integrated data comprises environment temperature and humidity data and cow walking ground condition data; inputting the milk cow walking image into a key part walking performance identification model to obtain a key part image, and identifying a key part joint point position according to the key part image; calculating a posture characteristic value and a gait parameter value of the dairy cow according to the joint point position; and training a machine learning algorithm model by taking the posture characteristic value, the gait parameter value, the visible-infrared light image of the cow hoof and the integrated data as inputs and the cow hoof injury degree as an output to obtain a cow limb and hoof expression abnormity identification model. According to the invention, the data is analyzed by using the image processing and machine learning algorithm model, and the later video processing does not depend on manual work.

The invention discloses a laser, visible and infrared portable composite target simulator which comprises a composite light source, a target, a card type optical system and a comprehensive control system. The composite light source adopts an integrating sphere structure, the integrating sphere is provided with a visible light source, an infrared radiation source and a laser fiber interface, the integrating sphere is also provided with an outlet, and the outlet can output a composite light beam; the cassette optical system comprises a secondary mirror and a primary mirror, and the target is arranged on a focal plane of the cassette optical system; the secondary mirror, the primary mirror, the target and the integrating sphere are coaxially arranged in sequence, and the composite light beam is emitted from an outlet of the integrating sphere, passes through the target and finally enters the cassette optical system; the comprehensive control system is connected with the integrating sphere through the visible light source, the infrared radiation source and the laser fiber interface, and is used for controlling the parameters of the laser, the visible light and the infrared radiation source. The device has basic functions of a specific wave band target simulator, can perform function verification on composite detection equipment, and is small in size, capable of being carried by one hand and good in portability.

The invention relates to the technical field of photoelectric pod optics, in particular to a photoelectric pod optical axis stability control device based on an MEMS fast reflecting mirror. Comprising a refraction window, an RC module, a light splitting module, a visible light imaging optical module and an infrared light imaging module. The refraction window is used for primarily transmitting and refracting incoming and outgoing light; the RC module is used for collecting and primarily focusing light and reflecting the focused light; the light splitting module is used for splitting light into two wavebands, namely visible light and infrared light, and reflecting and transmitting the light of the two wavebands; the visible light imaging optical module is used for receiving visible light and focusing and imaging the visible light; the infrared light imaging module is used for receiving visible infrared light and focusing and imaging the visible infrared light; through the above structure, image motion compensation can be carried out by using the fast reflecting mirror in small and medium photoelectric pod optical systems, and the imaging quality of a photoelectric pod is improved.

The invention discloses an up-conversion luminescence modified BiOBr-based composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: preparing a raw material A into an aqueous solution to obtain a turbid liquid; adding a polymer additive into the turbid liquid to obtain a precursor solution; putting the precursor solution into a hydrothermal reaction kettle for hydrothermal reaction to obtain white powder; centrifuging the white powder, washing and drying to obtain upconversion particles; fully and uniformly mixing the raw material B with up-conversion particles and ethylene glycol to obtain a turbid liquid; adding a polymer additive into the turbid liquid, fully and uniformly mixing to obtain a precursor solution, putting the precursor solution into a solvothermal reaction kettle to obtain powder, and centrifuging, washing and drying the powder to obtain the composite photocatalyst. The photocatalyst disclosed by the invention has a certain absorption effect on ultraviolet-visible-infrared band sunlight, so that the utilization efficiency of the photocatalyst on the sunlight is improved; the specific surface area is large, the adsorption capacity on pollutants is high, and degradation on the pollutants is facilitated.

The invention discloses an organic light emitting diode with a visible-infrared multispectral band free switching function. The organic light emitting diode sequentially comprises an anode, a hole injection / transmission layer, an infrared light emitting unit, a charge generation layer, a visible light emitting unit, an electron injection / transmission layer and a cathode, the charge generation layer sequentially comprises a P-type semiconductor layer, a transparent conductive layer, a buffer layer and an N-type semiconductor layer, the P-type semiconductor layer is arranged adjacent to the visible light emitting unit, and the N-type semiconductor layer is arranged adjacent to the infrared light emitting unit. The infrared light-emitting unit is prepared by thermally activating the delayed fluorescent material, so that the internal quantum efficiency of the organic light-emitting diode is effectively improved. In addition, the charge generation layer with high conductivity is designed to be connected in series with the light-emitting units, so that an organic lighting source with a visible-infrared multispectral band free switching function can be constructed.

The invention discloses a spectrum simulation control method and system for all-weather illumination and a storage medium, and belongs to the technical field of illumination control, and the method comprises the steps: constructing a reference spectrum model with solar terms, time and weather conditions as indexes, the model being established based on multi-band solar spectrum data of a target area and associated environmental parameters; configuring a composite LED light source covering ultraviolet, visible and infrared bands, calling the reference spectrum model in combination with the current solar term, time and environmental parameters, and resolving to generate a multi-channel driving signal to drive the light source to fit a target spectrum; and closed-loop control is formed through real-time feedback and correction of the spectrum sensor. The system for realizing the method comprises a data acquisition and modeling module, a spectrum fitting and control module, a composite LED light source module and other core units. The system can reproduce a natural spectrum in a high-fidelity manner, has dynamic self-adaption, all-weather coverage and personalized adjustment capabilities, is stable and reliable in operation, and can be widely applied to various illumination scenes.

The present invention discloses a variable array piping detection radar device, piping monitoring device, and identification method. The device comprises a radar bracket with three levels of vertical and horizontal adjustment, with 16 radar units arranged in a 4×4 matrix. An integrated edge computing module implements local signal noise reduction and preprocessing. The device is mounted on a self-propelled platform and combines a visible infrared dual-spectrum probe, a voiceprint recognition module, and a Beidou positioning system with an integrated acoustic, optical, and electrical mast to construct a multimodal monitoring system. The monitoring method dynamically adjusts daytime and nighttime monitoring weights, utilizes a bidirectional LSTM combined with an attention mechanism to extract features, and optimizes noise robustness through adversarial training to achieve fusion calculation of piping risk factors. The present invention constructs a closed-loop monitoring system with environmental self-adaptation, multi-source signal perception, and intelligent decision-making, enabling efficient and high-precision monitoring and early warning of piping, and achieving comprehensive breakthroughs in core indicators such as positioning accuracy, recognition accuracy, and environmental adaptability.

The invention relates to the technical field of control systems, in particular to a tool reference intelligent control system and method based on vision measurement. The control system comprises a high-definition camera, a standard ball and a controller, the standard balls are respectively mounted at a preset position easy to photograph and measure in a machine tool and on a cutter bar; the high-definition camera is in signal connection with the controller; the high-definition camera comprises a structured light camera, a visual camera and a light time-of-flight camera; wherein the structured light camera obtains position information of an object by emitting invisible infrared laser with a specific wavelength and calculating distortion of a returned coding pattern through a Harris corner detection algorithm, and is used for determining key feature points in an image; and the visual camera is used for simulating human eyes to obtain 3D data through two common cameras with a certain distance. According to the invention, unstable factors caused by manual participation in the machining process are removed, so that the production changing time is shortened, the product quality is stabilized, manual operation errors are avoided, and the working efficiency is improved.

The invention discloses a photoelectric detector, a preparation method of the photoelectric detector and a visible-infrared dual-band imaging system, and belongs to the field of semiconductor optoelectronic integration. The insulating layer is positioned on the upper surface of the substrate; the vertical heterojunction comprises a bipolar semiconductor layer and a channel semiconductor layer located on the upper surface of the bipolar semiconductor layer, and the bipolar semiconductor layer is located in the opening area. Due to the pyroelectric characteristic of the substrate, a dynamic polarization electric field can be generated when back gate voltage is applied to the substrate, and therefore the type and concentration of carriers in the bipolar semiconductor can be instantaneously regulated and controlled. The regulation and control mechanism and the vertical heterojunction jointly form a system in which the polarity of the vertical heterojunction is overturned under the induction of an electric field, so that the dual-band detection of visible light and infrared light is realized. The polarity of the vertical built-in electric field of the heterojunction interface can be accurately controlled by utilizing the polarization vector overturning of the pyroelectric substrate; a light splitting element is omitted, so that an optical link is extremely simple, and high-speed image processing and storage are supported.

The invention discloses a preparation method of a PEDOT: PSS-based visible-infrared electroluminescent spectrum regulation and control device, and belongs to the technical field of electrochromism. The invention aims to solve the problems of low emissivity regulation and control amplitude, single color change of a visible light area of the PEDOT: PSS film and incapability of adapting to various camouflage scenes due to the fact that the existing PEDOT: PSS film cannot be deeply reduced due to disconnection and isolation between conductive domains in the reduction process of the PEDOT: PSS film. The method comprises the following steps: 1, preparing a PEDOT: PSS-coated SWCNTs film; 2, solvent treatment; 3, dyeing the PEDOT: PSS (at) SWCNTs thin film; and 4, assembling the electro-emission device. The emissivity change delta epsilon of the PEDOT: PSS-based visible-infrared electroluminescent spectrum regulation and control device assembled in the invention in an infrared band is greater than or equal to 0.35, and the thermal radiation regulation and control capability of the PEDOT: PSS-based visible-infrared electroluminescent spectrum regulation and control device is remarkably improved through the final device functions and performances of multicolor visible light conversion (green / yellow / red system) and rapid and stable response.

The invention relates to a visible-infrared narrow spectrum dynamic regulation and control device based on reversible metal electrodeposition and a construction method thereof. The device is sequentially provided with a top substrate layer, a multilayer film structure, an electrolyte layer and a bottom transparent electrode layer from top to bottom; the top substrate layer and the multi-layer film structure jointly form a working electrode, and reversible deposition and metal dissolution are carried out on the working electrode by controlling external voltage; the multi-layer film structure comprises a micro-nano structure and a conductive layer, and narrow spectrum regulation and control are carried out in a visible-infrared band by regulating and controlling the multi-layer film structure. The device provided by the invention can realize narrow spectrum dynamic regulation and control of a specific wavelength in a visible-infrared band range, and is low in energy consumption, simple in structure and relatively low in cost.

The present invention provides a multispectral target detection model training method, a target detection method and a system, which belong to the field of target detection technology based on deep learning. When faced with problems such as poor target visibility due to bad weather, the present invention achieves the effect of data enhancement in the contour enhancement module, significantly improving the accuracy and robustness of target detection. A lightweight fusion focusing module is added to subdivide features into high-frequency and low-frequency features. While ensuring a low computational load of the model, detail information can be better extracted from visible light and infrared modalities, and the key information of targets in different spatial positions can be focused on the visible light-infrared modality. The self-attention mechanism of Transformer is used to appropriately fuse the complementary information of visible light-infrared features. The contrast bridge module uses the idea of ​​contrast learning to guide the model to improve its ability to perceive modality-invariant features in VIS-IR scenes, bridge the gap between visible light and infrared modalities, and adapt it to real complex visible-infrared scenes.

The invention provides a flexible cross-band compatible electromagnetic camouflage metasurface and a preparation method thereof, and the metasurface achieves high-absorptivity electromagnetic camouflage of visible-infrared bands through a micro-nano feature structure formed by a metal-dielectric material, and achieves high transmittance in a microwave band through the design of gaps of periodic patterns. The preparation method comprises the following steps: preparing the cross-band compatible electromagnetic camouflage structure on a hard substrate, and transferring the cross-band compatible electromagnetic camouflage structure to a flexible substrate through wet stripping or laser stripping and other processes. According to the invention, a visible-infrared wave-absorbing structure and a microwave transmission structure are organically integrated to form a cross-band compatible electromagnetic camouflage function layer, and the cross-band compatible electromagnetic camouflage function layer can be transferred to a flexible substrate to realize conformal fitting of complex curved surfaces such as a radome.

The utility model provides a kind of multispectral collaborative imaging structure, comprising: light source device, object carrying device and imaging device;The imaging device is movable imaging device.For the limitation of prior art, it is difficult to meet the technical problem of efficient, accurate multi-band collaborative test, the utility model can carry out ultraviolet-visible-infrared multi-band imaging to object simultaneously, and the device of standardized process provides more faster and accurate qualitative spectral test method;Greatly reduce the test error caused by human operation.

The invention discloses a carbon-based metastable-state photoacid composite material, a preparation method thereof and application of the carbon-based metastable-state photoacid composite material in CO2 capture, and belongs to the field of CO2 capture and solar energy utilization. The carbon-based metastable-state photoacid composite material is formed by compounding a carbon-based material and metastable-state photoacid, and the mass ratio of the carbon-based material to the metastable-state photoacid is 1: (1-30). According to the composite material, the metastable-state photoacid is used for absorbing an ultraviolet band in a solar spectrum, and the carbon-based material is used for absorbing a visible-infrared band in the solar spectrum, so that full-spectrum absorption of the sun is realized; wherein photons in the ultraviolet band are converted into chemical energy through the metastable-state photoacid, and photons in the visible-infrared band are converted into heat energy through the carbon-based material. The CO2-rich solution is subjected to chemical desorption and thermal desorption at the same time under the synergistic conversion effect of sunlight chemistry and heat, and quality improvement and efficiency improvement of desorption of the CO2-rich solution driven by solar energy are achieved. According to the invention, full-spectrum utilization of solar energy can be realized, and the problem of low-efficiency solar energy utilization caused by single conversion mode and low conversion efficiency in the existing solar energy carbon capture technology is solved.

A visualizer for use with an immunoassay rapid diagnostic test (RDT) with fluorescent probes includes a housing sized to enclose the RDT, an opening in the housing for insertion of the RDT, a viewing window in the housing positioned to align with a result window in the RDT when inserted in the housing, a UV / visible / infrared light source inside the housing for illuminating fluorescent probes in the result window so they may be viewed through the viewing window, and a switch for activating the light source. An RDT incorporating a UV / visible / infrared light source within its housing is also disclosed.

A method for preparing a self-supporting bismuth sulfide fiber membrane and its application in a flexible wide-spectrum photodetector. The self-supporting Bi2S3 fiber membrane is prepared by a simple one-step hydrothermal method without using any template or organic matter. The self-supporting Bi2S3 fiber membrane is self-assembled by interweaving ultra-long one-dimensional nanowires with a length of up to millimeters and an aspect ratio greater than 1000, and its size can reach at least about 7 cm × 2.5 cm. More importantly, the self-supporting Bi2S3 fiber membrane has excellent flexibility and plasticity, can be bent at will and can be cut into any shape. A flexible wide-spectrum photodetector is constructed based on the prepared self-supporting Bi2S3 fiber membrane, which can achieve wide-spectrum detection from ultraviolet, visible to infrared bands in both flat and bent states, and has high responsiveness, fast response speed and excellent stability.

The invention discloses a sandwich silicon-based heterojunction self-energized broadband photoelectric detector based on a Sb2O3 carrier barrier layer and a preparation method thereof, a Sb2O3 intermediate layer is prepared on a cleaned and pre-masked silicon substrate through an electron beam evaporation method to play a carrier blocking role, then a bismuth compound film is prepared on the Sb2O3 layer, and the Sb2O3 intermediate layer and the bismuth compound film are combined to form the Sb2O3 heterojunction self-energized broadband photoelectric detector based on the Sb2O3 carrier barrier layer. And finally, preparing a pair of electrodes on the surfaces of the silicon substrate and the bismuthide film to obtain the bismuthide / Sb2O3 / silicon sandwich heterojunction photoelectric detector. Compared with a bismuth compound / silicon heterojunction detector, the existence of the Sb2O3 carrier barrier layer can effectively reduce dark current and improve light current, excellent detection performance on ultraviolet-visible-infrared bands under the condition of room temperature and without external bias voltage is achieved, the detection rate and responsivity are improved by 2-4 orders of magnitude, the maximum is 1012 Jones and 10 <-1 > A / W, and the detection efficiency and responsivity are improved by 2-4 orders of magnitudes, the maximum is 10 <-1 > Jones and 10 <-1 > A / W. And meanwhile, excellent stability and a unit device imaging function are realized.

The utility model relates to the technical field of micro-magnetic induction dust adsorption, in particular to a micro-magnetic induction dust adsorption device, which is characterized in that a module IR (infrared) component emits specially modulated invisible infrared light to a shot object and simultaneously receives the invisible infrared light reflected back by the shot object; the module IR is used for receiving infrared light signals and obtaining space information of a shot object through calculation, the module IR converts the received infrared light signals into electric signals and transmits the electric signals to the chip assembly for processing, meanwhile, the dust collection assembly is powered on, the dust collection assembly conducts suction adsorption on dust, and therefore poor imaging of the module IR assembly is improved, and POG is reduced. Comprising a module IR assembly and a chip assembly, the module IR assembly is installed on the chip assembly, and the dust collection assembly is arranged between the module IR assembly and the chip assembly.

The application discloses a kind of building translucent multilayer composite glass and intelligent window, it is related to energy-saving equipment field, including the first transparent substrate, photoelectric layer, gas layer, photothermal layer, second transparent substrate, Low-e film layer, vacuum layer and third transparent substrate arranged in sequence.The building translucent multilayer composite glass of the present application can effectively collect and capture solar energy in ultraviolet band and part of visible and near-infrared band, and convert solar light into electric energy efficiently, and allow most of visible light to pass through;At the same time, the remaining near-infrared band sunlight is converted into heat energy for storage or use;Combining Low-e film layer and vacuum glass structure can reflect infrared band sunlight and environmental thermal radiation, effectively insulate heat exchange and improve thermal insulation performance.Therefore, the building translucent multilayer composite glass of the present application, as an intelligent window, can efficiently collect and utilize solar energy in ultraviolet-visible-infrared full band, helping to solve the problem of energy saving and emission reduction and energy supply in green building.

The invention discloses a visible light target detection method based on infrared guidance, and belongs to the field of computer vision. The method comprises the following steps: acquiring a visible-infrared target detection data set; constructing an infrared-guided visible light target detection network model; the constructed network model is trained; and obtaining a visible light image and an infrared image in an actual scene, and inputting the visible light image and the infrared image into the trained network model to obtain the type and the coordinate position of an interested target in the actual scene. According to the invention, a normal form of visible light target detection guided by the infrared sensor is designed, feature-level intelligent fusion is realized, and the target detection precision can be improved. In addition, the algorithm is low in calculation complexity and suitable for reasoning operation of edge equipment.

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.

The application discloses a carbon-based visible-infrared photodetector adopting carbon nanohorns and a preparation method thereof, which comprises a substrate, a composite carbon-based film located on the substrate, a source electrode and a drain electrode; the composite carbon-based film comprises a carbon nanotube network or array film and carbon nanohorns deposited in sequence; the drain electrode is located on the composite carbon-based film or between the composite carbon-based film and the substrate, and the source electrode is located on the composite carbon-based film or between the composite carbon-based film and the substrate. Advantages of the application are as follows: 1) the carbon nanohorns have good conductivity, which is beneficial to the transport of photo-generated carriers; 2) the carbon nanohorn structure has good absorption to infrared light; and 3) the device is simple to manufacture and compatible with traditional semiconductor processes.