48 results about "Infrared window" patented technology

The invention discloses a PINN-based infrared window surface anti-reflection micro-nano structure optimization design method, which is oriented to a sub-wavelength microstructure (such as a square column array or a cylinder array) on the surface of an infrared optical window, and comprises the following steps of: integrating physical constraints into a neural network model; and high-precision prediction of the reflectivity of the micro-nano structure and intelligent optimization of structural parameters are realized. Aiming at the characteristics of data scarcity and high dimension of design parameters, the invention provides innovative designs such as a parameter space sampling strategy, a PINN model architecture, a physical constraint fusion strategy and a training optimization method, and can effectively solve the problems of long time consumption, large data demand, poor model generalization performance and the like of a traditional design method. And infrared anti-reflection micro-nano structure parameters which meet physical rules and are excellent in performance can be obtained under the condition of less simulation data. According to the technical scheme, intelligentization and high efficiency of infrared window anti-reflection micro-nano structure parameter design are achieved.

This invention relates to the field of pyroelectric infrared sensor technology, and discloses a patch-type pyroelectric sensor with thermally insulating pins. The sensor includes a housing with insulating pins fixedly connected to its outer wall. An infrared window is disposed on the upper surface of the housing, and a backplate is disposed on the lower surface. A pyroelectric material element module is disposed inside the housing. The fabrication method of the pyroelectric sensor includes the following steps: Step 1, raw material preparation; Step 2, tool preparation; Step 3, solution preparation; Step 4, thin film substrate cleaning; Step 5, thin film coating; Step 6, thin film drying; Step 7, high-temperature annealing; and Step 8, polarization treatment. The insulating pins effectively isolate the sensor chip from the external environment, preventing external interference and noise from affecting the accuracy and stability of the sensor, thus ensuring the signal quality and reliability of the sensor.

The present application provides a wide-angle incident color-insensitive mid-infrared window film, which is structured from bottom to top as a base material G, a transition layer M1, a transition layer M2, a dielectric film system C, and an air layer A. The purpose of the present application is to achieve high transmittance of the infrared window in the mid-infrared spectral range under wide-angle incidence of 0-60°, while having the color-insensitive characteristic to visible light. The transition layer is composed of two oxides for improving the firmness of the film layer. The dielectric film system structure is composed of high and low refractive index materials deposited alternately, and the dielectric film system can ensure high transmittance of the infrared window in the mid-wave band range under wide-angle incidence, while having the color-insensitive characteristic to visible light. The wide-angle incident color-insensitive mid-infrared window film of the present application can be widely applied in the field of optical detection, imaging and other optical systems.

This invention proposes a rapid verification method for the imaging performance of an aperture-coded infrared hyperspectral imaging system. This method uses an N×M filter array as the indoor imaging target. This array includes a central infrared window and multiple filters with different center wavelengths surrounding the infrared window, containing rich spectral feature information and geometric and spatial positional information of the filters. Utilizing a large-area blackbody and a collimator with a large focal plane, the system can capture all the necessary information from the filter array. After image reconstruction, using the data from the central window as a reference, the spectral transmittance curves of each filter can be calculated quickly and accurately, thereby verifying the system's ability to acquire spectral information. The system's ability to acquire geometric information can also be verified by observing the geometry and relative positions of the filters in each spectral channel. This invention provides an efficient, reliable, and rapid verification method for aperture-coded infrared hyperspectral imaging systems.

This invention discloses a superhydrophobic radiation-cooling polymer coating, its preparation method, and its application. The coating is white and possesses a bicontinuous micro / nano porous structure. It is prepared by a ternary copolymerization reaction of polyurethane acrylate oligomers, acrylate reactive diluents, and vinyl siloxane porogens. The method involves initiating free radical polymerization of monomers in the porogen under ultraviolet light, inducing rapid phase separation, and naturally evaporating the porogen to obtain the coating. This coating exhibits superhydrophobicity without post-treatment, virtually no absorption in the solar spectrum, and near-100% emissivity in the mid-infrared window. Furthermore, the optical properties and superhydrophobicity of the coating are minimally affected by long-term ultraviolet irradiation, thermal aging, acids, and alkalis. This coating can be applied over large areas in high-performance radiation-cooling applications.

A thermal-image proximity gesture recognition module, a device having a thermal-image proximity gesture recognition function, and a thermal-image proximity gesture recognition method are disclosed. The device has a non-lens infrared window and a thermal-image proximity gesture recognition module. In the thermal-image proximity gesture recognition module, a thermal sensor array senses infrared irradiated from an object 5˜35 cm distant therefrom, and generates a thermal image array and output a thermally induced voltage array; an analog-to-digital converter converts the thermally inducted voltage array into a digital thermally inducted voltage array; a microcontroller receives the digital thermally induced voltage array of frames in a detection sequence, to determine whether there is a thermal object block matching a hand feature, and if yes, the microcontroller generates a gesture command based on a change of the thermal object block in at least two frames and transmits the gesture command to a main microcontroller.

The utility model relates to the technical field of infrared window processing, in particular to an optical vehicle-mounted camera infrared window processing device which comprises a bottom plate and a back adhesive film positioning block arranged on the bottom plate, and a product positioning plate is arranged above the back adhesive film positioning block. The product positioning plate is provided with an opening for exposing the upper surface of the gum film positioning block, and is provided with a PE (polyethylene) film adsorption plate capable of pressing down to fit a product. According to the utility model, the back adhesive film positioning block exposed out of the product positioning plate is used for positioning the back adhesive film, then the product positioning block is used for limiting the position of a product, and after the PE film adsorption plate adsorbs the PE film, the air cylinder is pressed downwards until the PE film is attached to the product, so that high-precision attachment of the back film and the PE film of the optical-grade vehicle-mounted camera infrared window is realized; through the technology of the utility model, the precision requirement of a product is ensured, the production efficiency is improved, and the manufacturing cost of an enterprise is reduced.

1. Name of the designed product: infrared window assembly tool. 2. Use of the designed product: for installation and disassembly. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

The utility model relates to the field of infrared technology. More specifically, the utility model relates to a blackbody radiation source device, comprising a housing with a vacuum interior, and a refrigerator, which is arranged in the housing and is attached to the inner wall of the housing; the heat conduction surface of the radiation part is attached to the refrigerator; an opening is formed in one side, opposite to the radiation surface of the radiation part, of the shell and is sealed through the infrared window; the temperature sensor is connected with the radiation part so as to acquire the temperature of the radiation part; and a suction unit. The utility model provides a blackbody radiation source device which is packaged by metal and is high in vacuum, and is applied to the field of performance index detection of infrared thermal imaging equipment.

The invention discloses a stationary satellite surface emissivity collaborative inversion method based on background field reconstruction, and belongs to the technical field of satellite remote sensing information processing, and the method comprises the steps: constructing a background field of surface temperature and atmospheric temperature space structure collaborative constraint, employing a three-dimensional variational assimilation cost function to assimilate the actually measured surface temperature of a surface meteorological observation station, and calculating the surface emissivity of a stationary satellite. The obtained surface temperature analysis field is used as a surface temperature initial guess field for inverting surface emissivity by a one-bit variation inversion cost function; generating a ground surface emissivity background field by using the ground surface emissivity in the ground surface element historical data set, and constructing a ground surface item background error covariance matrix capable of representing a coupling relationship between the ground surface emissivity and the ground surface temperature based on the ground surface element historical data set so as to construct a one-dimensional variation inversion cost function; and the inversion of the surface emissivity can be realized by combining the satellite observation brightness temperature of the clear sky observation pixel observed by the infrared window area channel of the stationary orbit radiation imager, so that the inversion level of the surface emissivity is improved.

The invention discloses an ultra-smooth low-defect polishing method for a fluorogallate infrared optical element, which comprises the following steps: preparing a special polishing solution special for fluorogallate glass, and carrying out low-defect modification and ultra-smooth polishing iteration processing on the fluorogallate infrared optical element until the technical index requirements are met. According to the processing method disclosed by the invention, the special polishing solution special for the fluorogallate glass is prepared, the deliquescence characteristic of a fluorogallate glass material is overcome, the generation of surface defects of the window mirror can be effectively inhibited, the surface shape precision and the surface quality of processing are further remarkably improved, and the processing method has the advantages of high processing efficiency, high processing quality, few processing defects and the like; and a solid foundation is laid for wide application of the fluorogallate glass material in the field of infrared window mirrors.

The invention discloses a near-infrared light-emitting material, a near-infrared fluorescent powder conversion type light-emitting diode and a preparation method, and relates to the technical field of light-emitting materials. The chemical formula of the near-infrared luminescent material is Cs2Hf (1-a) ReaCl6, and a ranges from 0.005 to 0.08. The near-infrared luminescent material Cs2Hf1-aReaCl6 provided by the invention does not contain lead and organic components, has low toxicity, good humidity and thermal stability and good biocompatibility, and can effectively inhibit self-absorption of the organic components of the near-infrared luminescent material Cs2Hf1-aReaCl6. In addition, Cs2Hf1-aReaCl6 also has excellent luminescence stability and has strong multi-peak emission crossing a first near-infrared window and a second near-infrared window, and emission peaks are respectively located at the wavelength of 726nm and 1342nm; in addition, due to the multi-stage distribution emission of the Cs2Hf1-aReaCl6, the rare photoluminescence quantum yield as high as 91.88% is achieved.

The application provides a kind of oblique incidence high-efficiency broadband long-wave light splitting film, the working angle of the light splitting film is 45°, the equivalent relationship of double-sided design and single-sided design under oblique incidence is established by numerical calculation, the target values of 45° single-sided transmittance and reflectivity are set, three kinds of refractive index alternating design methods are used for film system matching, the film system structure design optimization is completed, then the same film system is coated on the two sides of long-wave infrared substrate respectively, and the preparation of the light splitting film is realized. The purpose of the application is to realize the high-efficiency splitting of long-wave infrared window in the wavelength range of 7-12 μm with transmittance / reflectivity of 1:1 under 45° oblique incidence. The light splitting film has stable performance, small surface shape change and is suitable for optical systems such as imaging and detection.

The invention is applicable to the technical field of electrochemistry, and provides a chemical coating method for a strong-alkali-resistant broadband infrared window, which comprises the following steps: firstly, cleaning a composite infrared window with a mixed solution of H2SO4 and H2O2, and then washing with a large amount of ultrapure water; immersing the bright surface of the composite infrared window into the metal seed solution, and treating at room temperature for 2 minutes to grow a crystal nucleus; the metal seed solution is a mixed solution of an HF solution and a metal precursor solution; and clamping the composite infrared window, washing the composite infrared window with ultrapure water, placing the composite infrared window in an environment of 40-60 DEG C, contacting the composite infrared window with a mixed solution of a metal precursor solution and N2H4H2O, and depositing a metal layer within a set time. The method is simple, rapid and low in cost, and the prepared metal film is high in adhesive force with the substrate, good in stability, clean in surface and excellent in surface enhanced infrared activity.

The invention discloses a preparation method of a high-entropy LDH / MXene aerogel composite wave-absorbing material, which comprises the following steps: (1) dissolving ferric salt, cobalt salt, nickel salt, manganese salt and copper salt in water, adjusting the solution to be alkaline, and performing hydrothermal reaction at high temperature to obtain high-entropy layered double hydroxide nanoflower dispersion liquid; (2) mixing the high-entropy layered double hydroxide nanoflower dispersion liquid with the single-layer MXene dispersion liquid, fully and uniformly stirring, pre-freezing, and performing bidirectional freeze-drying to form a three-dimensional aerogel composite structure; and (3) carrying out heat treatment in an inert atmosphere to obtain the high-entropy layered double hydroxide composite MXene aerogel wave-absorbing material. The prepared composite wave-absorbing material has the characteristics of radar wave broadband absorption and infrared band low emissivity, the effective absorption bandwidth larger than 4 GHz is achieved in the range of 2-18 GHz, the minimum reflection loss is lower than-48.82 dB, and meanwhile the emissivity in an infrared window of 8-14 microns is lower than 0.35.

The invention relates to a small-sized high-precision low-temperature infrared thermal imaging device. The small-sized high-precision low-temperature infrared thermal imaging device comprises a vacuum cavity, a low-temperature temperature control module, a sample supporting and adjusting module, a medium-wave infrared window, a long-wave infrared window, a gold-plated reflector, a blackbody radiation source, an infrared detector and a signal processing module, different wave band radiation signals of the same target area are synchronously acquired through the medium wave infrared window and the long wave infrared window, and in combination with background radiation reference provided by the gold-plated reflector and standard radiation reference of the blackbody radiation source, the signal processing module can effectively distinguish self radiation of the target from environmental interference. The uncertainty caused by the fact that the emissivity changes along with the temperature and the wave band in single-wave band measurement is reduced, and the temperature measurement precision in the low-temperature environment is remarkably improved. The device solves the problems of weak infrared radiation signal, low temperature measurement precision, large measurement error caused by difficult calibration of emissivity of a complex sample and the like in a low-temperature environment in the prior art, and meets the requirements of high-precision low-temperature infrared thermal imaging measurement.

The invention discloses a VO2-based intermediate infrared window laser protection device and a preparation method thereof, and relates to an intermediate infrared window laser protection device and a preparation method thereof. The invention aims to solve the problems that the existing VO2 laser protection device is low in mid-infrared transmittance in an on state and the communication is completely cut off under laser irradiation. The laser protection device is sequentially composed of a first VO2 layer, a first HfO2 layer, a Si substrate, a second HfO2 layer and a second VO2 layer from top to bottom. The preparation method comprises the following steps: 1, respectively depositing a first HfO2 layer and a second HfO2 layer on two side surfaces of a Si substrate; 2, respectively depositing amorphous VO2 films on the surfaces of the first HfO2 layer and the second HfO2 layer, and then carrying out heat treatment to obtain a continuous VO2 film; and 3, etching the surface of the continuous VO2 film to form a plurality of micro-nano structure units arranged in an array. The invention is used for the intermediate infrared window laser protection device based on VO2 and the preparation thereof.

The application discloses a wafer-level infrared optical window with a deep cavity and relates to the field of infrared optical windows. The wafer-level infrared optical window with a deep cavity comprises a wafer, a wafer-level infrared window unit with a deep cavity is formed on the surface of the wafer, and four cross alignment marks are punched by laser on the periphery of the wafer. All photoetching patterns of the application are formed on a plane, thereby avoiding the problems of uneven spin coating of photoresist and difficult photoresist removal caused by photoetching on the wafer with the deep cavity. The application uses the photoetching method to form patterns in the whole process, thereby avoiding the problem of pattern edge divergence caused by the use of mechanical masks to form patterns in the deep groove. Furthermore, the application can meet the miniaturization requirement of the wafer-level infrared window with a deep cavity, the size of a single optical window can reach microns at the minimum, the size range of the optical window unit can be set to 500 um-5 mm, and it is difficult for general mechanical masks to complete the preparation of small-size optical windows under this specification.

The embodiment of the present application provides an infrared thermoelectric spectral imaging system and an infrared imaging method, and the system comprises: an imaging lens and a thermoelectric detector, the thermoelectric detector comprises: an infrared window, a filter film, a modulation structure and a detector array, the imaging lens, the infrared window and the detector array are sequentially arranged along the optical axis direction of the imaging lens, the filter film is attached to the infrared window, and the modulation structure is located between the infrared window and the detector array. By arranging the filter film on the infrared window and arranging the modulation structure between the infrared window and the detector array, the detection performance of the thermoelectric detector is improved without changing the structure of the current thermoelectric detector, and high-precision measurement of the spectrum of the incident light from the outside world is realized.

An infrared window cleaning system includes: an upstream robotic arm for adsorbing infrared windows from an upstream window box, the infrared windows having metallized portions, the metallized portions having a first facet and a second facet, the upstream robotic arm adsorbing the first facet; an upstream conveyor mechanism for receiving and clamping the two second facets and conveying them downstream; a first working module for receiving and clamping the two second facets and soaking them; a second working module for receiving and clamping the two second facets and wiping them with a nano-sponge on the front and rinsing them with cleaning liquid on the back; a third working module for receiving and clamping the two second facets and inverting them, wiping them with a nano-sponge on the back and rinsing them with cleaning liquid on the front; a fourth working module for receiving and clamping the two second facets and drying them on both sides; a downstream conveyor mechanism for receiving and clamping the two second facets and conveying them downstream; and a downstream robotic arm for removing the infrared window from the downstream conveyor mechanism and conveying it to the downstream window box.

The utility model discloses an infrared reflection spectrum vacuum online testing device, and belongs to the technical field of material testing devices. The infrared reflection spectrum vacuum online test device comprises a light path system, an infrared light source, an infrared window, a vacuum test cavity, a parabolic mirror, a liquid nitrogen refrigeration detector, a fixed bottom plate, a sample or a standard plate to be tested, an infrared integrating sphere and a data processing system. Wherein the parabolic mirror, the liquid nitrogen refrigeration detector, the fixed bottom plate, the to-be-tested sample or standard plate and the infrared integrating sphere are arranged in the vacuum test cavity; the infrared reflection spectrum vacuum on-line testing device is mainly used in various factor space environment tests (such as ultraviolet radiation, atomic oxygen radiation, electron radiation, proton radiation, thermal cycle and other single-factor or multi-factor comprehensive environment tests under vacuum) carried out in a vacuum test cavity or other test processes needing to be carried out in a vacuum environment. And measuring the infrared reflection spectrum of the material on line.

The application discloses a static satellite ground surface emissivity cooperative inversion method based on background field reconstruction and belongs to the technical field of satellite remote sensing information processing, which comprises the following steps: constructing a background field of spatial structure cooperation constraint of ground surface temperature and atmospheric temperature, adopting a three-dimensional variation assimilation cost function to assimilate the measured ground surface temperature of a ground meteorological observation station, obtaining a ground surface temperature analysis field as a ground surface temperature initial guess field of a one-dimensional variation inversion cost function to invert the ground surface emissivity; generating a ground surface emissivity background field from the ground surface emissivity in a ground surface element historical data set, constructing a ground surface item background error covariance matrix capable of representing the coupling relationship between the ground surface emissivity and the ground surface temperature based on the ground surface element historical data set, and further constructing a one-dimensional variation inversion cost function; and combining the satellite observation brightness temperature of a clear sky observation pixel observed by an infrared window channel of a geostationary orbit radiometer, so that the inversion of the ground surface emissivity can be realized, and thus the ground surface emissivity inversion level is improved.

The invention discloses a high-hardness oxide transparent ceramic and a preparation method thereof, which are used for solving the problem that the existing infrared optical window material cannot have high hardness and high thermal stability at the same time. The chemical formula of the ceramic is Mg < 2x > Li < 4-x > Al < 20-x > O < 32 >, wherein x is more than or equal to 0 and less than 4; the hardness reaches more than 18GPa, far exceeds that of the existing transparent ceramic, and is equivalent to that of sapphire single crystal; the linear transmittance in the range of 300-800nm is higher than 70%, and the transmittance in an atmospheric window of 3-5mu m is higher than 80%. In addition, the ceramic has excellent chemical stability, mechanical property, optical transparency and heat-conducting property, and meets the requirements of high-performance ultraviolet, visible, laser and infrared window materials; the raw materials are easy to obtain, and the preparation method is simple, convenient to operate and suitable for large-scale commercial popularization.

The invention provides an infrared window connecting device and an assembling and adjusting method thereof, and belongs to the technical field of electromagnetic compatibility and protection.The infrared window connecting device comprises a switching cylinder, an annular conductive rubber pad and a pressing ring, and the annular conductive rubber pad is installed between the pressing ring and window glass; electromagnetic waves are prevented from directly entering a gap between the window glass and the switching cylinder; the conductive silicone rubber is filled in the rubber storage groove of the stepped hole, so that electromagnetic waves are prevented from leaking from the lower end surface of the window glass and entering the thermal infrared imager through the adapter cylinder; a conductive adhesive tape is mounted between the adapter cylinder and the thermal infrared imager, so that electromagnetic waves are prevented from entering the thermal infrared imager through the adapter cylinder; and the side surface of the window glass and the upper end surface area and the lower end surface area close to the edge are respectively plated with a conductive electrode layer, so that the conductive continuity among the window glass, the switching cylinder and the pressing ring is further improved, and the electromagnetic shielding capability is improved.

A video laryngoscope including a display portion, a handle, and a camera assembly. The display portion includes a housing having a patient-facing side and a user-facing side. A display screen is disposed on the user-facing side and configured to display images captured by the camera assembly. An infrared window is disposed at another position on the video laryngoscope, such as on the patient-facing side of the housing. Infrared signals for pairing the video laryngoscope to other devices, such as monitors or external display screens, may be transmitted through the infrared window. For instance, an infrared receiver of the video laryngoscope may receive infrared signals through the infrared window and / or an infrared transmitter of the video laryngoscope may transmit infrared signals through the infrared window.

This invention provides an infrared spectroscopy detection device for operating devices, comprising a graphite flow field, a membrane electrode, an infrared window slot, and an infrared window flow field; the graphite flow field, membrane electrode, and infrared window slot are stacked together in sequence, and the infrared window flow field is engaged in the infrared window flow field slot; the infrared window flow field is made of an infrared transmitting material; and flow channels are provided on the infrared window flow field. This device can realize infrared spectroscopy detection of fuel cells or electrolyzers under operating conditions.

This invention provides a passive radiative cooling progressive freezing desalination device and method, belonging to the field of seawater desalination and water treatment technology. The device includes a radiative cooling unit, a high thermal conductivity substrate, a crystallization chamber, an insulation layer, and a concentrated brine discharge structure. The radiative cooling unit radiates heat into outer space through an atmospheric infrared window. The cooled energy is laterally homogenized by a metal extension body and then conducted to the brine crystallization surface by the high thermal conductivity substrate. With the assistance of an ice crystal nucleating agent, ice crystals gradually grow downwards from the crystallization surface, and salt is repelled to the lower liquid phase to form concentrated brine. The insulation layer blocks the intrusion of ambient heat from the sides and bottom, and the concentrated brine discharge structure achieves in-situ separation of ice crystals and concentrated brine. Using the device and method provided by this invention, the problem of low freshwater separation efficiency in existing technologies can be solved.

The invention belongs to the technical field of electromagnetic shielding materials, and particularly relates to an electromagnetic shielding infrared window with an electric heating function, which comprises an infrared base material, a metal mesh layer, an electric heating layer and an infrared antireflection film, the metal mesh layer is embedded in the outer surface layer of the infrared base material and is used for realizing electromagnetic shielding; the electric heating layer is formed by connecting a plurality of superfine metal heating wires in parallel, is embedded in the surface layer of the inner side of the infrared base material and is used for electric heating defrosting; the infrared antireflection films are plated on the surfaces of the two sides of the infrared base material and are used for improving the infrared transmittance; the metal mesh layer and the electric heating layer are embedded in the surface layer of the infrared base material through the femtosecond laser micro-nano machining technology, and an electromagnetic shielding, electric heating and infrared transmission integrated structure is formed. The embedded metal mesh, the superfine metal heating wire and the customized infrared anti-reflection film are integrated into a single window structure, the blank that multiple functions are difficult to be compatible in the prior art is filled, and the infrared anti-reflection window can be directly adapted to harsh use scenes in the high-end fields of aerospace, special vehicles, navigation photoelectricity and the like.

The invention provides an infrared multispectral imaging terminal, which comprises a vacuum box body, the temperature in the vacuum box body is lower than 120K, and the vacuum box body comprises an infrared window; the optical assembly is arranged in the vacuum box body, the optical assembly comprises a supporting cold plate and an optical element arranged on the supporting cold plate, and the optical element is used for transmitting and focusing the received infrared light; the filter wheel assembly is arranged in the vacuum box body and comprises a support, a filter wheel and a servo motor, the filter wheel and the servo motor are arranged on the support, and the servo motor drives the filter wheel to rotate in the vacuum box body; the infrared detector is arranged in the vacuum box body and is used for receiving infrared light which enters from the infrared window, is focused by the optical element and is filtered by the filter light wheel assembly; wherein the inner surface of the vacuum box body, the supporting cold plate and the surface of the filter wheel assembly are blackened, so that the infrared emissivity epsilon of the inner surface of the vacuum box body, the supporting cold plate and the surface of the filter wheel assembly is larger than or equal to 0.85. The infrared imaging quality can be improved.

The utility model provides an in-situ infrared reaction tank which comprises a cavity, a detachable front cover, a rear cover, a sample support, a heating piece, a first infrared window piece, a second infrared window piece and a sample loading infrared window piece, the front end of the cavity is connected with the detachable front cover in a clamped mode, and the rear end of the cavity is fixedly connected with the rear cover; the sample bracket is detachably connected with the sample loading infrared window sheet and is detachably connected into the chamber, and the heating sheet is arranged at the rear end of the sample bracket; the front end of the detachable front cover is detachably connected with a first infrared window sheet, and the rear cover is detachably connected with a second infrared window sheet; one side wall of the cavity is provided with an air inlet, the other side wall of the cavity is provided with an air outlet, the cavity is further provided with a wire inlet used for being connected with a heating sheet, and the front end of the cavity is provided with an inclined light source irradiation opening; the structure is compact, size is small and cost is low.