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90results about How to "High degree of miniaturization" patented technology

Biosensor circuit and sensor array consisting of a plurality of said biosensor circuits and biosensor array

Biosensor circuit arrangement including a substrate, a sensor element formed in or on a surface region of the substrate with a physical parameter, which is coupled to a substance to be examined, the type of coupling having a resistive component, the sensor element having an electrically conductive sensor electrode that is coupled to the substance to be examined, the sensor element having a measuring transistor the gate terminal of which is coupled to the electrically conductive sensor electrode, and the physical parameter being the threshold voltage of the measuring transistor, and a calibration device formed in or on the substrate, the calibration device being set up such that it is used to at least partly compensate for an alteration of the value of the physical parameter of the sensor element.
Owner:INFINEON TECH AG

Shaped Ground Plane For Radio Apparatus

This invention refers to an antenna structure for a wireless device comprising a ground plane and an antenna element, wherein the ground plane has a slot with at least a short end, an open end and a length substantially close to a quarter wavelength. The feeding and ground connections of the antenna structure are placed at the two different sides of said slot and the distance of at least one of them to the short end of the slot is equal or smaller than an eighth of the wavelength. The invention further refers to an antenna structure for a wireless device comprising a ground plane and an antenna element, wherein the ground plane has a slot with at least two short ends, and a length substantially close to half wavelength. The feeding and ground connections of the antenna structure are placed at the two different sides of said slot and the distance of at least one of them to a short end of the slot is equal or smaller than a quarter of the wavelength. Further the invention refers to a corresponding wireless device, a corresponding mobile phone and to a method for integrating such an antenna structure within a wireless device.
Owner:FRACTUS

Adhesive-Mountable Head-Wearable EEG Apparatus

An adhesive-mountable head-wearable EEG apparatus is disclosed. The apparatus includes an EEG sensor for acquiring an EEG signal of a wearer, a central processing unit for receiving the EEG signal, a small circuit board including the EEG sensor and the central processing unit, and a compact enclosing shell for enclosing the small circuit board, the EEG sensor, and the central processing unit. An adhesive electrode assembly attaches to the compact enclosing shell, or to the small circuit board within the enclosing shell, via snaps or magnets. The adhesive electrode assembly includes two or more gel electrodes for acquiring an EEG signal, and for adhering to the forehead so as to wearably support the EEG apparatus on the forehead. The compact enclosing shell includes chamfered edges, and is sized so as to reduce lateral forces on the compact shell that would tend to detach the EEG apparatus from the wearer's forehead.
Owner:VASAPOLLO CURZIO

Quartz capillary tube embedded all-silica fiber Fabry-Perot interferometric sensor and manufacturing method thereof

The invention discloses a quartz capillary tube embedded all-silica fiber Fabry-Perot interferometric sensor which comprises a single-mode optical fiber, a quartz capillary tube, a reflective optical fiber and a protective film, wherein the reflective optical fiber is a single-mode optical fiber or a multimode optical fiber, the two ends of the quartz capillary tube are respectively connected with one end of the single-mode optical fiber and one end of the reflective optical fiber by way of welding, and the hollow part of the quartz capillary tube is taken as the interferometric cavity of the interferometric sensor. In the interferometric sensor disclosed by the invention, a quartz capillary tube is adopted without plating a film, therefore, the cost for manufacturing the Fabry-Perot interferometric sensor is reduced, and the high contrast of the fiber Fabry-Perot interferometric sensor can be realized. The invention also discloses a method for manufacturing the sensor. The quartz capillary tube embedded all-silica fiber Fabry-Perot interferometric sensor disclosed by the invention has the characteristics of low cost, simple processing method, high miniaturization degree and good mechanical stability, and is convenient for production on large scale; and the practicability of the interferometric sensor is easy to realize, and the interferometric sensor has a potential practical value and a broad market in the field of interferometric sensors.
Owner:CHONGQING UNIV

Method for manufacturing a hybrid integrated component

A manufacturing method for hybrid integrated components having a very high degree of miniaturization is provided, which hybrid integrated components each have at least two MEMS elements each having at least one assigned ASIC element. Two MEMS / ASIC wafer stacks are initially created independently of one another in that two ASIC substrates are processed independently of one another; a semiconductor substrate is mounted on the processed surface of each of the two ASIC substrates, and a micromechanical structure is subsequently created in each of the two semiconductor substrates. The two MEMS / ASIC wafer stacks are mounted on top of each other, MEMS on MEMS. Only subsequently are the components separated.
Owner:ROBERT BOSCH GMBH

Method for manufacturing a hybrid integrated component

A simple and cost-effective manufacturing method for hybrid integrated components including at least one MEMS element, a cap for the micromechanical structure of the MEMS element, and at least one ASIC substrate, using which a high degree of miniaturization may be achieved. The micromechanical structure of the MEMS element and the cap are manufactured in a layered structure, proceeding from a shared semiconductor substrate, by applying at least one cap layer to a first surface of the semiconductor substrate, and by processing and structuring the semiconductor substrate proceeding from its other second surface, to produce and expose the micromechanical MEMS structure. The semiconductor substrate is then mounted with the MEMS-structured second surface on the ASIC substrate.
Owner:ROBERT BOSCH GMBH

Production technique for chicken powder with great freshness flavor

The invention discloses a production technique for chicken powder with a great freshness flavor, and belongs to the technical field of processing food seasoning. The chicken powder comprises the following materials according to mass: 30kg of fresh chicken skeletons, 30kg of fresh chicken, 7kg of maltodextrin, 2.5kg of disodium nucleotide, 0.1kg of sodium citrate, 7kg of trehalose, 10kg of edible salt, 10kg of monosodium glutamate, 2kg of lentinula edodes, 1kg of radix puerariae, and 0.4kg of pepper; the production technique comprises the steps: pretreating active ingredients, and carrying out high-temperature high-pressure sealed cooking, fine treatment, enzymolysis for flavor, mixing, spray drying, filling and capping. According to the production technique, the processes are simple, the energy consumption can be reduced, the loss of flavor components can be effectively reduced and sufficient release of flavor substances is promoted, the chicken powder is rich in chicken flavor, harmonious in saline taste, delicate flavor and perfume, luminous in color, good in rehydration property, smooth in mouthfeeling, free from sand grains, and milkily white in soup feeling.
Owner:GUANGDONG JIALONG FOOD

Semiconducting pixel, matrix of such pixels, semiconducting structure for the production of such pixels and their methods of fabrication

A pixel comprises three adjacent sub-pixels, formed by respective stacks of semi-conducting layers wherein: each sub-pixel comprises a first active layer, adapted for emitting a light at a first wavelength when an electric current passes through it; another sub-pixel comprises a second active layer, adapted for emitting a light at a second wavelength greater than the first wavelength; another sub-pixel comprises a third active layer, adapted for emitting a light at a third wavelength greater than the first wavelength and different from the second wavelength; at least one from among the second and third active layers being adapted for emitting light when it is excited by the light at the first wavelength emitted by the first active layer of the same sub-pixel. Semi-conducting structure and methods for the fabrication of such a pixel are provided.
Owner:CENT NAT DE LA RECHERCHE SCI

MASSIVE MIMO antenna

The invention relates to a MASSIVE MIMO antenna. The MASSIVE MIMO antenna comprises a reflecting plate, a plurality of radiating units and a calibration module, wherein a calibration network, filtersand RF connectors are integrated on a PCB of the calibration module, so that the calibration module has the functions of signal calibration and filtering simultaneously, and an external filter is notneeded in the use process of the MASSIVE MIMO antenna. Moreover, the calibration network, the filters and the RF connectors are integrated by the PCB, and the structure of the calibration module is more compact. Therefore, the MASSIVE MIMO antenna has a higher degree of miniaturization, and a communication base station is miniaturized. Besides, due to integral design of the filters and the calibration module, matching performance of electrical parameters of the two cascaded components can be fully considered in design and can be optimized as much as possible, and accordingly, optimal interconnection design between the filter performance and the antenna performance is achieved.
Owner:COMBA TELECOM TECH (GUANGZHOU) CO LTD

Producing process for microfined organic pigment, microfined organic pigment and microfined organic pigment coloring composition

The invention relates to a producing process for microfined organic pigment, a microfined organic pigment and a microfined organic pigmet coloring composition. the problem to be addressed is to provide a producing method for obtaining microfined organic pigment which can be applied on the coloring film of the liquid crystal television with low lantency, excellent view angle dependency, high transparency, a microfined organic pigment produced thereby, and microfined organic pigment coloring composition using the microfined organic pigment. The invention solves the problem by the producing process of the microfined organic pigment, which is characterized in that an organic pigment, a water-soluble inorganic salt, a water-soluble organic solvent and a resin (A) are mechanically compounded toobtain a compounding composition, then the water-soluble inorganic salt and the water-soluble organic solvent are removed by water, wherein the resin (A) has solubility of over a weight part with respect to 100 weight parts of water-soluble organic solvent under 25 DEG C., and containing an amino group and / or a quaternary ammonium cations.
Owner:TOYO INK SC HOLD CO LTD

Adjustable and controllable optical flow control dye laser based on electrorheological effect

The invention discloses an adjustable and controllable optical flow control dye laser based on an electrorheological effect. A system in the prior art has the defects of complexity, incapability of adjusting and controlling and very high requirement on the preparation process. The electrorheological effect and an optical flow control technology are combined to form an adjustable and controllable optical resonant cavity, thereby constructing a tunable laser with an electric field adjusting and controlling laser output mode. Incident pump beams are form a converged pump light field after being subjected to beam shaping and spatial light modulation in sequence; the resonant cavity is a cylindrical cavity, two circular end faces are high-reflecting surfaces for forming optical feedback, the cavity is filled with a dye suspension, and the cavity is provided with an electrode for an external control electric field, thereby realizing an electric field adjusting and controlling optical resonance condition and a laser emitting mode. The adjustable and controllable optical flow control dye laser has the advantages of the conventional optical flow control laser as well as the characteristics of adjustable resonance cavity performance, controllable output beam mode, simplified system structure, simple preparation process, high miniaturization degree, good beam quality, axially symmetric optical pumping, high pumping optical energy utilization ratio and the like.
Owner:上海微鸢电子科技有限公司

Microflow control chip integrated unit in integrated constant temperature system in high efficiency

This is a kind of miniflow control chip integral device of highly efficient constant temperature system. It includes a temperature thermostat and a micro 3D controller. The 3D controller is fixed on one side of the bed flatform, and the temperature thermostat is made up of two micro metal incubators, one on the top and the other on the bottom. In the incubators there are circulate conduits for the temperature-controlling working substance, and between the incubators the miniflow control chips are set on the flatform. Also there are the sustainer and the spiral controlling nuts between the incubators to make the height between two incubators almost the same as the thickness of the chip. This invention is miniflow control chip integral device of the integrated temperature thermostat, and using it can make the experiment run in the temperature set before and cancel the perturbance of the temperature in and outside the system. As a resut, we can greatly improve the replaying ability of the experiment and widen the use and researching area of the electrophoretic chip.
Owner:NANJING UNIV

Spark plug and method for production of a spark plug

The invention describes a spark plug having an outer electrode (12), a central electrode (10), an inner conductor (2) connected to the central electrode (10) and an insulator (3) enclosing the inner conductor (2). It is provided according to the invention that the insulator (3) is produced by extrusion. The invention further relates to a method for production of a spark plug of that kind.
Owner:FEDERAL MOGUL IGNITION +1

Mono-coil self-unloading type two-component electromagnetic valve

The invention discloses a mono-coil miniaturized self-unloading type two-component electromagnetic valve structure. The mono-coil miniaturized self-unloading type two-component electromagnetic valve structure is composed of a base body (an integrated valve body), a valve element, a spring, a coil, a gasket, a magnetic isolation pad, rubber O-shaped rings and the like. The electromagnetic valve is used for controlling startup and shutdown of an engine. Through the optimal matching design of the sealing positions of two-channel propulsive agents, self-unloading is achieved through a coaxial valve element by means of the mutual differences of the two-channel propulsive agents in the directions of medium force on the valve element, the carrying capacity caused by the medium force can be substantially reduced, and it is beneficial to reduce driving loads of an electromagnet and achieve the quick-response design of the valve. According to the electromagnetic valve structure, the two-channel valve element and the unloading structure are highly integrated and the mono-coil drives two-channel supply so that the miniaturization degree of the two-component control valve can be greatly improved. The pressure adaptive capacity of the valve is greatly improved through the self-unloading structure, the improvement of the high-pressure adaptive capacity of the valve based on the theory also becomes very easy, and a new pressure working condition can be adapted only by matching the spring force with the working pressure.
Owner:XIAN AEROSPACE PROPULSION INST

Small side-feed antipodal Vivaldi antenna with resistor loading

The invention belongs to the ultra wide band antenna technology in the field of airborne communication and particularly relates to a small side-feed antipodal Vivaldi antenna with resistor loading. The antenna is a microstrip antenna with a simple structure and is formed by the order stacking of an upper layer metal layer, a medium base plate, and a lower layer metal layer. According to the antenna, on the basis of a traditional antipodal Vivaldi antenna, a feeder is bent to a side, the size of the antenna is reduced greatly, and the miniaturization degree is raised. The width of the feeder is changed in a step way, and thus the antenna maintains good input impedance matching in a wider bandwidth. The directivity is improved by using the modes of resistor loading and a parasitic patch. A loading metal with a special shape is used, and thus a high gain is maintained while the directivity is improved.
Owner:ENG UNIV OF THE CHINESE PEOPLES ARMED POLICE FORCE

Multiservice Antenna System Assembly

This invention relates generally to a multiservice antenna system assembly. The multiservice antenna system assembly may include one antenna that is fastened by means of a support, or at least two antennas that are grouped together by means of a support. The support may, for example, be a plastic packing. This invention is particularly useful when the antenna assembly is located in automobile rear-view mirrors and more particularly in exterior rear-view mirrors.
Owner:ADVANCED AUTOMOTIVE ANTENNAS

Fine pitch package structure

The invention relates to a fine pitch package structure which includes a line substrate, a chip and a heat dissipating sheet. The line substrate has a plurality of lines. Each line has a thickness of 4-8 [mu]m, and the width among the lines is between 10-18 [mu]m. The chip is disposed on the line substrate, and the right side of the chip faces towards the surface of the line substrate and is in electrical connection to the lines. The heat dissipating sheet is disposed on the back side of the chip and the surface of the line substrate so as to guide the heat generated by the chip to air and the line substrate. The fine pitch package structure can achieve fine effects and the effects of fast heat dissipation by means of the lines and the heat dissipating sheet.
Owner:CHIPBOND TECH

Sensor element

A sensor element is provided for sensing accelerations in three spatial directions, which furnishes reliable measurement results and moreover can be implemented economically and with a small configuration. The sensor element encompasses at least one seismic mass deflectable in three spatial directions, a diaphragm structure that functions as a suspension mount for the seismic mass, and at least one stationary counterelectrode for capacitive sensing of the deflections of the diaphragm structure. According to the exemplary embodiments and / or exemplary methods of the present invention, the diaphragm structure encompasses at least four electrode regions, electrically separated from one another, that are mechanically coupled via the seismic mass.
Owner:ROBERT BOSCH GMBH

Miniature waveguide filter

The invention discloses a miniature waveguide filter. The miniature waveguide filter comprises a waveguide body and a concave structure body, wherein the waveguide body is of an integral structure, and comprises a waveguide side wall and a waveguide bottom part; the concave structure body is of an integral structure, and comprises a concave structure side wall and a concave structure bottom part; the single concave structure body is embedded into the single waveguide body to form a miniature waveguide resonator with a hollow concave structure; a plurality of miniature waveguide resonators with different volumes are mutually embedded to form a miniature waveguide filter body through the hollow concave structures; the attaching part of the embedded miniature waveguide resonators is provided with a coupling window; the miniature waveguide filter body is provided with an input and output port. The miniature waveguide filter has the advantages that the miniature effect of waveguide filter is realized; the volume and weight of waveguide filter are effectively reduced.
Owner:储鹏

Microflow control chip integrated unit in integrated constant temperature system in high efficiency

This is a kind of miniflow control chip integral device of highly efficient constant temperature system. It includes a temperature thermostat and a micro 3D controller. The 3D controller is fixed on one side of the bed flatform, and the temperature thermostat is made up of two micro metal incubators, one on the top and the other on the bottom. In the incubators there are circulate conduits for the temperature-controlling working substance, and between the incubators the miniflow control chips are set on the flatform. Also there are the sustainer and the spiral controlling nuts between the incubators to make the height between two incubators almost the same as the thickness of the chip. This invention is miniflow control chip integral device of the integrated temperature thermostat, and using it can make the experiment run in the temperature set before and cancel the perturbance of the temperature in and outside the system. As a resut, we can greatly improve the replaying ability of the experiment and widen the use and researching area of the electrophoretic chip.
Owner:NANJING UNIV

Bionic flapping wing actuating mechanism capable of realizing flapping and torsion composite motion

InactiveCN112340015AAchieve active twistAchieving flutter-twisting compound movementsOrnithoptersFlapping wingCrank
The embodiment of the invention discloses a bionic flapping wing actuating mechanism capable of realizing flapping and torsion composite motion. The actuating mechanism comprises a rack, a motor, a first gear, a main swing mechanism and an auxiliary swing mechanism, the main swing mechanism comprises a left special-shaped gear swing rod, a right special-shaped gear swing rod and linkage swing rods; the first gear and any one of the left special-shaped gear swing rod and the right special-shaped gear swing rod form a first crank swing guide rod mechanism; the linkage swing rods are arranged onthe two sides of the rack in a swing mode respectively, second crank swing guide rod mechanisms are formed between the linkage swing rods and the left special-shaped gear swing rod and between the linkage swing rods and the right special-shaped gear swing rod, and the main swing mechanism and the auxiliary swing mechanism are symmetrical in structure and are arranged on the front side and the rearside of the rack respectively. The auxiliary swing mechanism is in synchronous linkage with the first gear through a transmission shaft. By the adoption of the bionic flapping wing actuating mechanism, the microminiaturization degree is higher, the flapping amplitude is closer to the actual flying level of insects, large-angle active torsion of the wing can be achieved, and the bionic flapping wing actuating mechanism has the very high bionic level and application value.
Owner:SHANTOU UNIV

Calibration circuit, calibration network and intelligent antenna

The invention relates to a calibration circuit, a calibration network and an intelligent antenna. The calibration circuit comprises a power distribution network module and a plurality of directional couplers. And each branch port of the power distribution network module is electrically connected with one end of each directional coupler in a one-to-one correspondence manner. The directional couplercomprises a first coupling section and a second coupling section which are coupled and connected. The first coupling section is used for being electrically connected between the intelligent antenna port and the antenna array. One end of the second coupling section is electrically connected with a branch port of the power distribution network module, and the other end of the second coupling section is grounded. The characteristic impedance of the first coupling section is smaller than that of the second coupling section, and the electrical length of the first coupling section is larger than that of the second coupling section. The directional couplers in the calibration circuit are modified, the asymmetric directional couplers are composed of the two coupling sections with different characteristic impedances and different electrical lengths, the asymmetric directional couplers and the power distribution network module form a new calibration circuit, and the miniaturization degree of the calibration network is greatly improved.
Owner:COMBA TELECOM TECH (GUANGZHOU) CO LTD

Micro integrated CMOS optical fiber spectrometer

The invention discloses a micro integrated CMOS optical fiber spectrometer, which comprises a light source, an optical fiber, a blazed grating, a concave lens, a linear CMOS sensor, an upper computerand the like. When the selected light source is irradiated to a to-be-tested sample and enters the optical fiber spectrometer, due to different absorption and reflection by different substances towards spectrums in different bands, the spectral characteristics of a to-be-tested substance can be detected, and the kind and the concentration of the substance can thus be judged. The spectrometer is characterized in that an incident optical fiber is adopted, and through optical fiber coupling, a modular measurement system can be formed by the light source and the optical fiber spectrometer. On onehand, the optical fiber replaces an incident slit, the used optical fiber core diameter is changed to adjust the slit width, and on the other hand, the optical fiber is used for transmitting light source signals and sample output signals at the same time, the blazed grating and the concave lens carry out splitting and imaging on the tested light source, the sensor adopts the linear CMOS digital sensor, the CMOS sensor can put a driving circuit, an amplification circuit and a signal processing circuit together, and the size of the spectrometer can be greatly reduced.
Owner:NANJING UNIV OF POSTS & TELECOMM

Mechanical agitation type magnetized fuel water doping device

The invention discloses a mechanical agitation type magnetized fuel water doping device. The mechanical agitation type magnetized fuel water doping device comprises an emulsifier, a magnetization treatment device, a water-doped fuel tank and a monitoring system, wherein the emulsifier is provided with three quick connectors, namely a water-doped fuel outlet, a water inlet and a fuel inlet respectively; the magnetization treatment device is a permanent magnet material non-contact device and comprises two permanent magnets, a support frame, an adjustable screw and a connecting and fixing part; the two permanent magnets are positioned on two sides of an oil delivery pipeline; and the magnetization treatment device is fixed at the oil delivery pipeline. According to the emulsifier disclosed by the invention, a high-speed agitation technology is combined with a magnetization treatment technology, so that the traditional advantages of respective technologies can be ensured and are organically combined to reach the better effects of saving fuel and reducing pollutants. Two technologies are combined to prepare water-doped fuel and no additive for emulsifying is used; and compared with a pure mechanical agitation technology and other preparation processes, the combined technologies have the advantages of higher uniformity in oil-water mixing, higher micronized degree of water drops and higher uniformity in dispersion of the water drops.
Owner:DALIAN MARITIME UNIVERSITY

Microfluidic chip, microfluidic device, associated uses and methods

The present invention relates to a chip equipped with a plurality of compact microfluidic valves with multiple inlets and outlets, actuated by means of a flexible membrane system. The chip preferably comprises a deformable sealing layer made of at least one flexible, elastic, and insulating material; a structure formed by a succession of one or several microstructured layers, wherein said structure comprises one or several micro-chambers, one or several microfluidic channels, and one or several fluidic inlets and outlets; and wherein said structure is installed on a base substrate. The invention likewise relates to a microfluidic device that comprises the aforementioned chip, to a method for the fabrication of the chip, and to the uses associated with the chip and the microfluidic device.
Owner:UNIV DE ZARAGOZA +2

Electric lamp and manufacture method therefor

A high pressure gas discharge lamp (1) which comprises a ceramic discharge vessel (3) having a container wall (2) enclosing a discharge space (4) having a filling (6). A first (11) and a second electrode (13) are mutually oppositely arranged in the discharge space and are mounted on a first (19) and a second feed-through (21) respectively, which extend in a gas-tightly sealed manner through the container wall (2). A UV-enhancer (23) comprises a wall portion (24) and a chamber (29), said chamber being enclosed by the wall portion (24) of the UV-enhancer (23) and an end part (26) of the container wall (2).
Owner:SIGNIFY HLDG BV

Optical system, camera module and electronic equipment

Provided are an optical system, a camera module and electronic equipment. The optical system sequentially comprises, from an object side to an image side, a first lens element with negative refractive power which has an object-side surface being concave in a paraxial region thereof; a second lens element; a third lens element with positive refractive power which has an object-side surface and an image-side surface being convex in a paraxial region thereof; a fourth lens element with positive refractive power which has an image-side surface being convex in a paraxial region thereof; a fifth lens element with negative refractive power which has a concave object-side surface in a paraxial region thereof; a sixth lens element which has a concave image-side surface in a paraxial region thereof; a seventh lens element with positive refractive power which has an object-side surface and an image-side surface being convex in a paraxial region thereof; and an eighth lens element with negative refractive power which has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. By reasonably configuring the surface types and refractive power of the first to eighth lens elements, the imaging quality of the optical system is improved.
Owner:JIANGXI JINGCHAO OPTICAL CO LTD

Panoramic digital output camera

The invention discloses a panoramic digital output camera. The panoramic digital output camera comprises a spherical pedestal, a group of camera devices are uniformly arranged on the spherical pedestal, and the camera further comprises a half-round transparent sphere cover, a base and a cover shell; a working space is formed between the half-round sphere cover and the lower end surface of the base; the spherical pedestal is arranged in the working space; a through hole is formed on the lower end surface of the base; the bottom surface of the cover shell is arranged above the upper end surfaceof the base; the periphery wall wrapping the whole base extends from the cover shell along the lower end surface direction of the base, the periphery wall is cambered, and a gap is reserved between the opening edge of the periphery wall and a connecting part; an air inlet pipe for communicating the external of the cover shell and the internal of the base is arranged between the bottom surface of the cover shell; an air hole for communicating the internal of the cover shell with the internal of the base is further formed on the top surface of the base; and a draft fan for drafting air to the external of the base is arranged in the air hole. The camera disclosed by the invention completely eradicates the fogging problem in the camera, and the dual-layer arrangement of the sphere cover greatly relieves the problem that the sphere cover surface is fogging.
Owner:QINGYUAN QISHENG TECH CO LTD
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