42results about How to "Reduce reflection loss" patented technology

The invention provides a hollow-core-to-hollow or solid-core-to-hollow optical fiber connection jumper wire and a preparation method thereof. The jumper wire comprises a transmission fiber and connectors connected to the two ends of the transmission fiber. The transmission fiber is a hollow-core optical fiber, the connector comprises an optical fiber fixing device and an integrated welding structure fixed in the optical fiber fixing device, the integrated welding structure comprises a transmission fiber, a coating film and a transition fiber which are fixedly connected in sequence, the coating film performs anti-reflection on a set wavelength, the transition fiber is a solid-core optical fiber, and the outer side end of the transition fiber serves as the output end of the connector; and the output ends of different connectors are oppositely arranged so as to realize transmission connection between different jumpers. Pluggable, stable and reliable connection between the hollow-core optical fibers or between the hollow-core optical fibers and the solid-core optical fibers is achieved.

This invention provides an infrared thermal imaging method, relating to the field of infrared thermal imaging technology. The method utilizes a germanium infrared lens in an infrared thermal imaging system, whose surface is sequentially composed of subwavelength micro / nano structures and an anti-reflection film structure from the inside out. The infrared thermal imaging method includes: focusing target infrared radiation through the germanium infrared lens onto an infrared detection array; the infrared detection array converting the target infrared radiation into an electrical signal matrix; performing noise reduction and gain correction on the electrical signal matrix to obtain a preprocessed electrical signal matrix; performing temperature compensation on the preprocessed electrical signal matrix based on a temperature compensation formula and a transmittance temperature model to obtain a corrected signal matrix; and sequentially performing non-uniformity correction, image enhancement, and pseudo-color mapping on the corrected signal matrix before outputting and displaying the result. Using the method of this invention, higher transmittance, lower reflection loss, and more stable thermal imaging can be achieved.

The utility model relates to the technical field of retroreflective sheeting provides an environmental protection type hard PVC retroreflective sheet, solves the problem that the reflectivity of existing retroreflective sheet is low, and the optical performance is relatively weak, and the surface layer anti -peeling impact force is not good, including the retroreflective sheet body, the retroreflective sheet body includes the protective surface layer, prism air microcapsule layer, degradable back film layer from top to bottom sequentially laminated, the prism air microcapsule layer includes wall material and core material, the core material includes prism reflection matrix layer and air layer, the protective surface layer is by PVC material layer and acrylic material layer composite, the prism reflection matrix layer is by several microangle pyramid prism structure unit close arrangement, the microangle pyramid prism structure unit is cutting obtains to cubic angle pyramid prism.

The application provides a fiber-optic Fabry-Perot sensor based on light beam convergence and a manufacturing method thereof, and relates to the technical field of semiconductors. The sensor comprises a diaphragm layer, an intermediate layer and a bottom layer which are arranged in layers; the diaphragm layer is provided with a first groove, the intermediate layer is attached to the diaphragm layer in a manner that a first layer surface thereof faces the first groove, so as to form a Fabry-Perot cavity based on the first groove; the bottom layer is provided with a second groove, the intermediate layer is attached to the bottom layer in a manner that a second layer surface thereof faces the second groove, so as to form a nano-containing cavity based on the second groove; the second layer surface of the intermediate layer is formed with a micro-nano anti-reflection structure comprising array-distributed anti-reflection units located in the nano-containing cavity; and the bottom layer is formed with a micro-nano collimation structure comprising array-distributed collimation units located in the nano-containing cavity and in a symmetrical positional relationship with the micro-nano anti-reflection structure. The application at least reduces the manufacturing complexity.

The application discloses a kind of self-sealing inorganic sealing welding LED light source and inorganic sealing welding method, LED light source includes substrate, LED chip and light window, substrate top surface is equipped with electrode layer, welding layer, and LED chip is welded on electrode layer;Light window includes tube shell, lens, and the lower end of tube shell is welded on welding layer;It is equipped with ring cup-shaped light cup around LED chip in tube shell, and the outer side of the bottom surface of light cup is equipped with the positioning gap of opening outward along circumference, and the corresponding position of welding layer is equipped with the positioning dam for cooperating with positioning gap to position light cup, and positioning dam is equipped with the sealing glue for bonding fixed light cup, and part of sealing glue overflow is connected with welding layer and is sealed;Positioning dam includes inner dam, middle dam and outer dam sequentially arranged from inside to outside, and satisfy middle dam height h2>Inner dam height h1≥Outer dam height h3.The application has the advantages of good air tightness and high light extraction efficiency.

The utility model relates to gem processing detection technical field more specifically, relate to a gem cutting and grinding process three -dimensional dynamic optical detection module, including mounting bracket, the mounting bracket includes upper roof, left side board, lower bottom plate and right side board, the upper roof, left side board, lower bottom plate and right side board combine and form the rectangular structure, wherein the middle part of upper roof is provided with fixed hole, the middle part of lower bottom plate is open, the right side and left side of lower bottom plate are provided with first off -axis parabolic mirror and second off -axis parabolic mirror respectively, the upside of first off -axis parabolic mirror and second off -axis parabolic mirror is provided with semiconductor laser and acquisition camera respectively. First off -axis parabolic mirror focuses laser to gem surface, second off -axis parabolic mirror captures the laser signal of gem surface reflection, and reflects it to acquisition camera, realizes the dynamic focusing of curved surface gem detection without aberration, and this detection mode adopts non -contact detection, avoids the damage of gem surface.

The application discloses a kind of natural rubber filling nickel-aluminum bimetallic hydroxide multi-walled carbon nanotube composite material for electronic component packaging, belong to packaging material technical field, the composite material includes natural rubber matrix and dispersed nickel-aluminum bimetallic hydroxide / multi-walled carbon nanotube hybrid filler, the hybrid filler is made of multi-walled carbon nanotube and nickel-aluminum layered double hydroxide grown in its surface in situ.Its preparation method is: multi-walled carbon nanotube, nickel source, aluminum source, urea and ammonium fluoride are dissolved in water and prepared hybrid filler by hydrothermal reaction;Then it is mixed with natural latex, vulcanization aid dispersion, freeze-drying, vulcanization is obtained.The application improves the dispersibility of filler by constructing LDH / MWCNT hybrid structure, uses phonon transmission optimization, synergism of loss and impedance, combustion inhibition and the friction and reinforcing mechanism of hybrid filler and natural rubber molecular chain, so that the thermal conductivity, electromagnetic wave absorption capacity, flame retardancy, mechanics and damping performance of the composite material are simultaneously improved, suitable for electronic component packaging field.

The invention discloses a radio frequency chip integrated packaging structure and technology, and the structure comprises the following steps: carrying out the primary packaging of a first line which is parallel and is uniformly arranged at intervals, and forming a first packaging layer; holes are drilled in the surface of the first encapsulation layer to expose all end points of the first lines, metal is electroplated on the exposed end points to fill the drilled holes, wiring connecting columns are electroplated on a set of diagonal end points arranged on the two edge first lines, and first stand columns are electroplated on the other exposed end points; electroplating a wiring layer on one surface of the encapsulation layer, and electrically rearranging the wiring connecting columns; the electrical end of the bare chip is electrically connected and mounted with the corresponding wiring layer, and the bare chip and the wiring layer are encapsulated again to form an encapsulation layer II; drilling holes in the surface of the encapsulation layer II to expose the end points of the upright posts I, and electroplating upright posts II on the exposed end points to fill the drilled holes; the bare chip is located in the geometric center of the three-dimensional coil, the induction current and the signal intensity are optimal, the three-dimensional coil has the more omnidirectional induction characteristic, and stable coupling can be kept.

The utility model relates to display equipment technical field especially LED packaging structure and display device, LED packaging structure includes wiring layer, with the LED chip of wiring layer electricity connection, the filling layer that sets up around LED chip, set up in the sapphire layer that LED chip far away from wiring layer one side and LED chip are pasted, LED packaging structure still includes the fluorescent layer that sets up around filling layer and sapphire layer, fluorescent layer sets up around filling layer and sapphire layer, realizes spectrum conversion, when the blue light that LED chip emits irradiates on fluorescent layer, fluorescent layer absorbs part blue light and emits other color light, and the white light that mixes with blue light is obtained to realize MIP white light product, make the light that emits from LED packaging structure more uniform, improve illumination quality and visual comfort.

The optical path system comprises a red light, a green light, a beam splitter and a lens, and further comprises a special-shaped prism, the red light and the green light are separately arranged front and back, and the special-shaped prism comprises a first reflecting surface and a second reflecting surface; light rays emitted by the red light and light rays emitted by the green light can be gathered together after being reflected by the first reflecting surface and the second reflecting surface respectively and pass through the lens, and the light rays passing through the lens can be visible by human eyes after being reflected by the beam splitter. According to the light path system, the special-shaped prism is used for integration, after achromatism and collimation are conducted through the lens, the collimated light is reflected, compared with a solving method in the market, the light path system reduces one reflecting mirror besides solving the problems of dislocation, parallax and chromatic aberration of the two-color lamp, only one beam splitter is needed, and the cost is reduced. The reflection loss of light energy can be greatly reduced, the brightness of reflected light is increased, the service life of the power supply is indirectly prolonged, and the power consumption can be reduced under the condition of consistent brightness.

This application provides an optical system and a laser cutting device. The system includes a first focusing lens, a concave lens, and a focusing lens group arranged coaxially along a first direction. The first direction is the initial transmission direction of the light emitted by the target light source. The optical axis of the first focusing lens passes through the virtual focal point of the target light source. The virtual focal point is the point where the reverse rays of the light emitted by the target light source converge. The distance between the first focusing lens and the virtual focal point of the target light source is greater than the focal length of the first focusing lens. The concave lens is configured to change the distance between itself and the first focusing lens to adjust the aberration of the light emitted by the target light source. As the distance between the first focusing lens and the concave lens in the collimating lens group changes from far to near, the optical system exhibits the following trends: negative defocus beam convergence and tending towards a flat top, positive defocus dispersion and tending towards Gaussianization, then the distribution of positive and negative defocus beams becomes equal, and finally, negative defocus dispersion and tending towards Gaussianization, and positive defocus beam convergence and tending towards a flat top.

An organic electroluminescence device comprises an anode, a cathode and an organic layer formed between the anode and the cathode, the organic layer comprising a hole injection layer, a hole transport region, an electron blocking layer, a light emitting region, an electron transport region; the hole transport region comprises a first material and a second material, the first material and the second material are sequentially evaporated to form two layers of hole transport layer, the first material is selected from the compound shown in formula 1; the second material is selected from the compound shown in formula 2. The first material with high refractive index is arranged as the first hole transport layer, the second material with low refractive index is arranged as the second hole transport layer, and the structure of the first material and the second material is limited respectively, through the comprehensive regulation of the material structure, the energy level and the refractive index of the double-layer hole transport layer, the limitations of single material or simple mixed material in the hole transport and the light emitting efficiency are overcome.

The application discloses a bacteriostatic sunscreen self-dehumidifying mask, and relates to the technical field of masks.The bacteriostatic sunscreen self-dehumidifying mask is characterized by a three-layer gradient structure of a hydrophobic layer, a hydrophilic layer and a photothermal layer, synergistic effect of the three layers, efficient directional migration of water under a one-way moisture guiding mechanism, rapid evaporation and self-dehumidification realized in combination with the light-heat conversion characteristics of the photothermal layer, significant reduction of moisture accumulation in the mask, avoidance of facial moisture and bacterial breeding risks during wearing, and improvement of overall comfort and hygiene level.The air vent is located at the lower side to guide the directional circulation of air flow, reduce facial discomfort, and the user can fix the mask through a detachable plastic frame, replace the composite moisture-absorbing gel module conveniently, and ensure long-term and efficient protection.

The application discloses a flexible tactile sensor based on a functional substrate, preparation and an intelligent sensing system. The sensor takes an elastomer matrix doped with mechanical luminescent micro-nanoparticles as a functional substrate, discards a traditional non-functional inert substrate, directly constructs a flexible transparent electrode and a photoelectric conversion function stack on the surface, and forms a vertical structure without medium separation. The structure not only greatly reduces the modulus of the device, realizes close conformal coating on a complex curved surface, but also significantly improves the photoelectric coupling efficiency and sensitivity. The intelligent sensing system comprises a special signal conditioning circuit and an intelligent decision center. By configuring a programmable action threshold library and a multi-mode discrimination logic, the system can realize unmanned aerial vehicle dark field tactile priority control, robot dynamic slip detection and structure impact energy evaluation. The application solves the problems of poor flexibility of traditional devices and low system integration, and is suitable for the field of self-powered dynamic pressure sensing.

The invention provides a three-terminal laminated solar cell based on a silicon nanowire structure, and relates to the technical field of solar cells. A first electrode layer is arranged in the perovskite top cell in the direction facing the incident light, a second electrode layer and a third electrode layer are arranged in the crystalline silicon bottom cell in the direction deviating from the incident light, and a plurality of nanowire structures are arranged on one side, facing the incident light, of an N-type silicon absorption layer at intervals. The nanowire structure can enhance coupling and propagation of long-wave photons to the N-type silicon absorption layer through a waveguide effect and a light field modulation effect, and the nanowire structure presents a sub-wavelength optical characteristic, so that an anti-reflection effect in a wide spectrum range is realized, and the absorption efficiency of the crystal silicon bottom cell on the long-wave photons is improved. In addition, by arranging a three-electrode structure, the overall energy output performance of the battery is improved.

This utility model discloses an impedance-gradient composite honeycomb sandwich integrated sound absorption and insulation structure, including an upper surface plate, a lower surface plate, and a composite honeycomb sandwich layer located between the upper and lower surface plates. The composite honeycomb sandwich layer is composed of multiple honeycomb units of different specifications, with the pore size of the honeycomb units gradually decreasing from near the upper surface plate to near the lower surface plate. This structure achieves impedance gradation through the design of the impedance-gradient composite honeycomb sandwich layer, which can gradually adapt to impedance changes, reduce sound wave reflection loss at the interface, and allow more sound waves to enter the interior of the structure and be absorbed and consumed, significantly improving sound absorption and insulation performance. Furthermore, the different materials work together to fully utilize their respective sound absorption and insulation advantages, forming a good synergistic effect and further improving the overall noise reduction effect. At the same time, a positioning structure is designed between the upper and lower surface plates and the composite honeycomb sandwich layer to ensure the stability of the subsequent overall adhesive assembly.

This invention belongs to the field of high-entropy ceramic materials technology, and discloses a perovskite ceramic material, its preparation method, and its application. The general chemical formula of the perovskite ceramic material of this invention is: (Ba y1 Sr y2 Ca y3 )Fe x O3, where x = 0.5–1.5, y1 = y2 = y3 = 0.2–0.4. The resulting perovskite-type ceramic material, when composited with paraffin at a mass ratio of 9:1 and a thickness of 1.2 mm, exhibits an absorption bandwidth of 4.16 GHz and a minimum reflection loss of -40.58 dB, demonstrating a wide effective absorption bandwidth and high absorption intensity even at low thicknesses. Furthermore, the material preparation method uses water as a solvent, eliminating the need for highly toxic chemical reagents, making it environmentally friendly and pollution-free. The preparation process is simple, low-cost, and suitable for large-scale industrial production.

This utility model discloses an encapsulation component for improving the power generation of a module under low irradiance, comprising, from top to bottom, an antireflective front glass, an antireflective film, a stacked crystalline silicon cell, a transparent film, and a grid-coated high-reflectivity back glass. The antireflective front glass includes high-transparency glass and a double-layer coating layer disposed on the upper surface of the high-transparency glass. The antireflective high-refractive-index film includes a cross-linked elastomer film layer disposed near the antireflective front glass and a high-refractive-index film layer disposed near the stacked crystalline silicon cell. This utility model features a double-coating design for the upper high-transparency glass, which improves light transmittance and incident rate, thereby increasing the incident energy of light reaching the solar cells and increasing module power. The middle anti-reflective high-refractive-index film layer, through a double-layer refractive index difference design, reduces the loss of light due to refraction and reflection caused by the refractive index difference, thereby increasing the incident light reaching the solar cells and increasing module power generation efficiency. The bottom layer of high-reflective grid-coated glass is a white grid-coated glass, which improves the secondary utilization rate of incident light. Matching the uppermost low-thickness anti-reflective glass, it can effectively ensure the overall mechanical load design of the module.

The invention belongs to the technical field of functional composite materials, and particularly relates to a hollow porous magnetic carbon fiber framework material, a composite coating with electromagnetic wave absorption and anti-corrosion functions, a preparation method and application. The hollow porous magnetic carbon fiber framework material is prepared by adopting a method comprising the following steps: transferring a mixture of nickel nitrate hexahydrate, 2, 5-dihydroxyterephthalic acid and DMF (Dimethyl Formamide) into a reaction kettle, and heating for reaction to obtain a nickel metal organic framework material; taking a mixture of PAN, copper nitrate monohydrate, a nickel metal organic framework material and PMMA as a shell layer solution, taking a polymethyl methacrylate solution as a core layer solution, and performing coaxial electrostatic spinning to obtain a core-shell structure nanofiber felt; and carrying out pre-oxidation, template sacrifice and carbonization treatment. Impedance matching of the coating filler can be effectively optimized, and excellent electromagnetic wave absorption performance is achieved through the synergistic effect of dielectric loss, magnetic loss and multi-interface polarization.

The application discloses a kind of millimeter wave waveguide transmission loss compensation methods, it is related to millimeter wave waveguide transmission technical field, including multidimensional transmission loss real-time monitoring step, collection signal amplitude, phase and other electrical parameters and temperature, humidity, structural deformation and other parameters, ensure data time synchronization;Loss mechanism hierarchical analysis step, distinguish three kinds of loss proportion, clear dominant factor;Self-adapting compensation strategy matching step, according to loss type select exclusive or collaborative compensation mode;Dynamic compensation parameter optimization step, adapt signal frequency adjustment device parameter;Real-time feedback and fine adjustment step, compare signal quality dynamic correction parameter;Closed-loop iterative optimization step, construct mapping model iterative update, form whole-process closed loop.The application realizes the accurate and efficient compensation of millimeter wave waveguide transmission loss, improves signal transmission stability and environmental adaptability;With fast response and long-term operation reliability, provide support for millimeter wave technology scale application.

The invention relates to the technical field of terahertz communication, in particular to a terahertz radiation source SiP module and a design method thereof, and the terahertz radiation source SiP module comprises a packaging shell, a built-in power amplifier chip, a packaging substrate, a metal micro coaxial feed network and an antenna array. The feed network is integrated in an antenna array and is composed of a plurality of stages of T-shaped micro coaxial power dividers, and a part of ports are provided with two impedance conversion structures, so that broadband impedance matching within a 110-170GHz frequency band is realized. The output end of the power amplifier chip is connected with the input end of the feed network through the packaging substrate, the broadband radiation unit of the antenna array is in butt joint with the output port of the feed network, and amplified terahertz signals are radiated to a free space. The module optimizes the performance through integrated design, is suitable for high-frequency terahertz communication and detection scenes, and has the characteristics of compact structure, wide frequency band and high efficiency.

The application discloses a light adjusting module with a three-layer composite structure, which comprises a scattering layer, a gap layer and an angle control layer which are arranged in a composite manner, the gap layer is arranged between the scattering layer and the angle control layer, the surface of the scattering layer is provided with a plurality of first optical microstructures, the surface of the angle control layer is provided with a plurality of second optical microstructures, and the gap layer comprises a plurality of light adjusting channels for guiding light from the scattering layer to the angle control layer. The light adjusting device with the three-layer composite structure is a whole of the scattering layer, the gap layer and the outer angle control layer, the functions of the light adjusting channels and the angle control layer are coupled, high light efficiency is realized, the synchronization optimization of light angle control, anti-dazzle and light spot uniformity is completed, and the contradiction between'scattering reduction' and 'anti-dazzle loss of uniformity' in the traditional technology is broken through.

The invention discloses light-cured piezoelectric ceramic slurry and a preparation method and application thereof.According to the light-cured piezoelectric ceramic slurry, two-functional-group aliphatic polyurethane acrylate, hexanediol diacrylate and trimethylolpropane triacrylate are compounded, a phosphate hyperdispersant is combined, firm chemical anchoring can be formed with modified barium titanate, and the piezoelectric ceramic slurry can be applied to light-cured piezoelectric ceramics. In addition, a curing system composed of low-viscosity active monomer hexanediol diacrylate, high-crosslinking-density trimethylolpropane triacrylate and a visible light initiator is adopted, the curing system is matched with the light absorption characteristic of modified barium titanate, and therefore the light absorption property of the modified barium titanate is improved. And enough penetration depth and interlayer binding force are ensured. A DLP technology is adopted to accurately print a ceramic green body framework at one time, a barium titanate ceramic framework with a complete structure and high density is obtained after degreasing and sintering, the 3-3 type piezoelectric composite material with controllable precision is prepared, the reflection loss of sound waves is reduced, and the quality of the material is further ensured.

This invention discloses a method for manufacturing a circuit board and the circuit board itself. The method includes the following steps performed sequentially: taking a core board with an inner patterned circuit layer on its surface; installing a chip: machining a recessed groove at a predetermined position on the core board and inserting the chip into the recessed groove; laminating: laminating and fixing a layer board onto the surface of the core board to drive the chip to be hidden inside the layer board; conducting: setting patterned circuits and connecting holes on the surface of the layer board, with the connecting holes corresponding to the chip, and the hole walls of the connecting holes being able to be copper-clad to drive the patterned circuits to connect with the chip, thereby forming a multilayer board; taking a copper block with a thickness matching the thickness of the multilayer board; installing the copper block: embedding and installing the copper block into the multilayer board; surface circuit processing: machining an outer patterned circuit layer on the surface of the multilayer board. This method can achieve efficient circuit connection, shorten the signal transmission path, reduce delay and reflection loss, and solve the problem of copper block lamination, thereby improving quality and efficiency.

A cross-band multistage adjustable radar wave-absorbing structure, a design method and a preparation method belong to the technical field of electromagnetic wave regulation and control. The cross-band multistage adjustable radar wave-absorbing structure is prepared by using a photoetching process and a magnetron sputtering process, can realize absorption of a specific wave band under S / C / X wave bands, and sequentially comprises a patterned microwave absorbing layer, a chalcogenide phase change material layer, a heat bearing layer, a metal electrode layer and a flexible dielectric layer. The metal-insulating state conversion of the chalcogenide phase change material is realized by controlling the conductivity of the chalcogenide phase change material, the Fermi level of the chalcogenide phase change material is adjusted by controlling the chalcogenide phase change material, multi-band absorption adjustment is realized, perfect absorption is realized at multiple specific frequency points, and a certain angle insensitivity characteristic is possessed. Meanwhile, the structure of the chalcogenide phase change material layer is simple, mass production and processing requirements are met, the application of the phase change material in the GHz field is expanded, and the design is flexible, electrically adjustable, and widely applied.

The application discloses a kind of intelligent reflecting surface unit with wideband low loss and intelligent reflecting surface, including interval air layer arrangement first dielectric substrate and second dielectric substrate, the first dielectric substrate one side is provided radiation patch, the one side of the second dielectric substrate is provided metal ground plate, the other side of second dielectric substrate is provided direct current control line, the radiation patch includes multiple coplanar metal patches, each metal patch is slotted in vertical direction and is connected using varactor, by controlling the direct current voltage at both ends of multiple varactors, so that the phase shift of intelligent reflecting surface unit continuously changes.The application not only reduces the reflection loss of unit, improves the directivity coefficient bandwidth of intelligent reflecting surface antenna, and the radiation performance has good stability in frequency band.

This invention provides an antenna device comprising a resonant shell, a substrate, a high-frequency unit, and a low-frequency unit. The substrate is disposed on the resonant shell. The high-frequency unit is disposed on the substrate and has a high-frequency excitation slot and a high-frequency matching slot. The low-frequency unit includes a first low-frequency body, a second low-frequency body, and a third low-frequency body. The first, second, and third low-frequency bodies are located on one side of the high-frequency unit. The second low-frequency body is connected to the high-frequency unit and adjacent to the high-frequency matching slot. The high-frequency unit, the first low-frequency body, and the second low-frequency body together surround the third low-frequency body. A low-frequency matching slot is located on the side of the second low-frequency body away from the third low-frequency body. The solution provided by this invention can improve the communication stability of the antenna device, thereby improving the communication quality of the antenna device.

The application discloses a structure for preventing light guide from yellowing and aging, and relates to the technical field of automobile lighting. The structure comprises a substrate provided with LED chips, a silica gel lens covering the light emitting surface of the LED chips, and a light guide fixed above the substrate. The silica gel lens is in a semi-spherical structure, and an air gap is arranged between the highest point of the outer surface of the silica gel lens and the incident end surface of the light guide. The incident end surface of the light guide is provided with an optical tooth structure. The silica gel lens is preferably formed by curing high-refractive two-component silica gel. The application pre-converges light through the semi-spherical silica gel lens, realizes uniform total reflection of the light in combination with the optical tooth structure, and makes up for the light beam divergence loss caused by the air gap. Meanwhile, the air gap physically blocks heat conduction, reduces the heat load and high-temperature light radiation damage of the light guide, effectively solves the aging and yellowing problem caused by thermal deformation of the light guide, and improves the overall light efficiency and the service life of the lamp.

The loudspeaker waterproof structure comprises a loudspeaker assembly, the loudspeaker assembly comprises a loudspeaker body and a loudspeaker support, the loudspeaker support is provided with a mounting groove, and the loudspeaker body is arranged in the mounting groove; the loudspeaker bracket is provided with a mounting groove for accommodating the loudspeaker body; the loudspeaker support is provided with a loudspeaker hole and forms a first cavity with the loudspeaker body. The front shell assembly is provided with a sound guide hole corresponding to the horn hole, and the sound guide hole is in butt joint with the first cavity to form a second cavity; the waterproof gum covers the sound guide hole. A coherent acoustic channel is formed through a dual structure of a first cavity formed by the loudspeaker support and the loudspeaker body and a second cavity in butt joint with the sound guide hole, it is ensured that sound is directly transmitted from the front face of front sound output, and distortion or volume attenuation caused by shielding is avoided. And water vapor and dust are directly prevented from entering from the outside through the sealing of the waterproof gum at the outer side of the sound guide hole, so that the waterproof performance is ensured, the acoustic path is optimized in cooperation with the cavity structure, and the sound quality loss is reduced.