321results about How to "Realize the filtering function" patented technology

The invention discloses a full-duplex active phased filter antenna array surface, and aims at providing an antenna array surface with high-isolation array transmitting and receiving and good filter characteristic. A transmitting antenna array surface of a transmitting array antenna and a receiving antenna array surface of a receiving array antenna consist of a plurality of arrayed radiation units;a multi-layer printed board integrally integrating a radiation circuit, a feed switching circuit and a filter circuit achieves connection between different circuits by vertical interconnection structures of metallized via holes; a metal upper cavity body of a transmitting-receiving component serves as a metal ground; a metal upper cavity body base of a metal floor is consubstantially connected byradio-frequency fuzz button connectors; and then a radiation unit and transmitting-receiving component integrated box-type submatrix module filter antenna unit is formed. With the adoption of the full-duplex active phased filter antenna array surface, high-isolation array transmitting and receiving can be achieved; insertion losses of array transmitting and receiving can be reduced; and high-precision amplitude and phase control can be achieved.

The invention relates to a light filter, in particular to an integrated narrowband micro light filter. The integrated narrowband micro light filter is provided with a substrate, a dielectric film layer structure and a metal grating, wherein the dielectric film layer structure is arranged on the upper surface of the substrate and provided with at least two dielectric film layers; the refractive indexes of the dielectric film layers are different; the metal grating is arranged on the upper surface of the dielectric film layer structure and is a one-dimensional metal grating or two-dimensional metal grating. By adjusting the period of the grating and the refractive indexes and thickness of the dielectric film layers, the center wavelength and bandwidth of a passing band of the light filter can be adjusted. The integrated narrowband micro light filter is small in size and can be integrated and applied on a micro optical system and a photoelectric device conveniently. The integrated narrowband micro light filter is used for integrating the micro optical system or being integrated on the photoelectric device to achieve the light filtering function. The integrated narrowband micro light filter can be manufactured on a transparent dielectric substrate to serve as a unit element to be used on the micro optical system, and can also be integrated in the photoelectric device to serve as a structural unit so as to filter light reflected by the photoelectric device.

The invention discloses a thin-film lithium niobate-based integrated chip and a preparation method thereof. A substrate material is silicon-based thin film lithium niobate; the waveguide is a lithiumniobate ridge waveguide; the structure comprises an input / output port, a Mach-Zehnder electro-optic intensity modulator and a coupled double-ring resonator, a Mach-Zehnder modulator comprises two 1*2multimode interference couplers, two modulation arms and a GSG electrode, two coupling regions of the coupled double-ring resonator adopt coupling coefficient tuning units based on a Mach-Zehnder interference structure, and regulation and control electrodes are arranged in the coupling regions and the cavity; a radio frequency signal is loaded to an optical carrier through the modulator and thenis processed by the resonator, and the output signal is output to a detector or other unit chips through the output end, so that the functions of filtering, time delay and the like are realized. The electro-optical modulator and the micro-ring resonator are integrated, the filtering and time-delay functions are achieved, the all-silicon-based thin film lithium niobate material is adopted, and theadvantages of being large in bandwidth and rapid in tuning are achieved.

The invention discloses a cigarette filter tip with a health care function. The cigarette filter tip comprises a cavernous body, wherein a traditional Chinese medicine capsule is arranged in the cavernous body and comprises a capsule body and liquid traditional Chinese medicine composition arranged in the capsule body; the liquid traditional Chinese medicine composition is formed by brewing, concentrating and purifying following raw materials; the raw materials comprise radix angelicae, herba eupatorii, almond, red ginseng, pummelo peel, donkey-hide gelatin, peppermint, tendril-leaved fritillary bulb, lily, radix paeoniae alba, siraitia grosvenorii, honeysuckle, asparagus fern, radix ophiopogonis, American ginseng and liquorice. The cigarette filter tip is 6 to 7 mm in diameter and 20 to 30 mm in length; and the traditional Chinese medicine capsule is 3.5 mm in diameter and 10 to 13 mm in length. Compared with the prior art, the cigarette filter tip has the effects of relieving a coach, eliminating phlegm, moistening the lung and removing bad breath by adding the traditional Chinese medicine capsule in the cavernous body, can reduce the side effects of cigarettes to the body of a smoker, and has an obvious effect.

The invention discloses a display panel and a display device. The display panel comprises a substrate, pixel units positioned on the substrate and an encapsulation layer, each pixel unit comprises multiple sub-pixel units, and the encapsulation layer covers the sub-pixel units and has a filtering function; the encapsulation layer comprises a first reflection layer, a second reflection layer, a dielectric layer and at least one inorganic layer; the different sub-pixel units in the pixel unit correspond to different thicknesses of dielectric layers in the encapsulation layer; and the dielectriclayer, the first reflection layer and the second reflection layer corresponding to the same sub-pixel unit form a micro cavity structure, the micro cavity structure allows light corresponding to colorof the sub-pixel unit to pass and does not light of other color to pass, thus, the filtering function is realized. The encapsulation layer has functions of encapsulation and filtering, so that it isnot required to set colored optical filters, the thickness of outlet light is reduced, cross-color phenomena can be reduced among the pixels, a visual angle of the display panel is increased, and a product is more competitive.

The invention discloses a polarization-insensitive micro-ring filter based on a silicon nanowire waveguide. The polarization-insensitive micro-ring filter comprises a first micro-ring filter and a second micro-ring filter, wherein a heating electrode used for adjusting resonant wavelength is arranged above each of the first micro-ring filter and the second micro-ring filter, the first micro-ring filter and the second micro-ring filter operate in a single-polarization and have the same resonant wavelength, the first micro-ring filter and the second micro-ring filter are respectively used for filtering in a TM polarization mode and a TE polarization mode in an interchangeable manner, each micro-ring filter is provided with a group of metal regions or the micro-ring filters are provided with the same group of metal regions, and the resonant wavelength is corrected through heating the two groups of metal electrodes or combining with a laser oxidizing waveguide. The polarization-insensitive micro-ring filter disclosed by the invention has the advantages of small size and simple structure, and provides a feasible scheme for solving the polarization sensitive problem of the micro-loop filter.

The invention provides an LCL-type active power filter and a control method thereof. The LCL-type active power filter comprises a converter T1 and a control system, wherein one side of the converter T1 is connected in parallel with a DC capacitor C, an LCL filter circuit is arranged at the other side of the converter T1 and comprises a filter capacitor Cf, a converter T1 side is connected with a filter inductor L1, a power grid side is connected with a filter inductor L2, the control system is connected with an output end of the single-phase converter T1, the filter capacitor Cf, the DC capacitor C and a load respectively by a filter inductor L1 current sampling circuit, a filter capacitor voltage sampling circuit, a DC capacitor voltage sampling circuit and a load current sampling circuit, and the control system is used for closed-ring control on a current of the inductor L1 at the converter T1 side. According to the control method of the LCL-type active power filter, a filtering effect of the LCL-type active power filter can be improved by introducing virtual impedance control and phase compensation control.

This invention relates to one instant message filter method, which comprises the following steps: in instant message chat room system to establish and activate, customer end sends instant message filter conduction message to servo; after filtering the message received by servo to analyze the message for effective validation; if pass, then ergo stores instant message filter condition according to the instant message filter condition; if not feeding back error codes response to customer end.

The invention discloses field emergency water treatment equipment. The equipment mainly comprises a pre-treater and a drinking water treater, wherein the pre-treater is connected with a suction pipe capable of being put in a water source through a water pump; the rear of the pre-treater is connected to the drinking water treater through a pipeline and at least one drinking water pipe from which clean water can flow out is connected; a filter net capable of filtering to remove visible particles is arranged in the pre-treater; a strainer mainly made of at least one material of a metal net, a non-woven fabric, a plastic and asbestos and capable of filtering big particles is arranged on the head of the suction pipe; and the rear of the pre-treater is connected with the drinking water treater consisting of at least one filtration work chamber, one ultrafiltration work chamber and one ultraviolet sterilization work chamber. The equipment has the characteristics of convenient carrying, simple and convenient filtration, optional moving, no limitation for using environment, realization of filtering function by automatically controlling water pressure without requirements on power supply and water pressure, and the like.

The invention provides a cell separation system and a method thereof, the system comprises a centrifugal device, wherein a centrifugal frame is arranged in the centrifugal device, the centrifugal frame is connected with a centrifugal motor, the centrifugal frame is driven to rotate, a holder for placing a centrifuge tube is provided at the centrifugal frame to centrifuge the liquid in the centrifuge tube; and the centrifugal device is provided with a corner positioning device; at least one liquid adding device is provided, the liquid adding device is provided with a pump for injecting a presetliquid into the centrifuge tube; least one precise dosing device is provided, the precise dosing device is provided with a screw push device, a peristaltic pump or a diaphragm pump to achieve precisefilling of the liquid into the centrifuge tube; at least one suction device is provided, the suction device is provided with a suction pipe which can be lifted and lowered, the suction pipe is connected with a vacuum device or a suction pump, the suction device extends the suction pipe into the centrifuge tube to a predetermined depth, and the liquid in the centrifuge tube is pumped away. The system is capable of automating the process of cell separation, thereby achieving automated cell separation operation at a low cost, and ensuring separation quality.

The invention provides a preparation method of a novel high-efficiency haze filtration silver nanowire net and MOFs (metal-organic frameworks) composite porous fiber film material. The preparation method is characterized by comprising the following steps of preparation of silver nanowires, preparation of MOFs, preparation of a spinning precursor solution, preparation of a spinning solution, electrostatic spinning, preparation of suction filtration dispersing liquid and suction filtration and filming. The preparation method has the benefits that the preparation method of the novel high-efficiency haze filtration silver nanowire net and MOFs composite porous fiber film material prepares a composite fiber film by using the silver nanowires in certain diameters and the MOFs in certain particlesizes for doping; pore sizes of the fiber film formed by the spinning are used for filtration; at the same time, lower voltage is applied; particulates are collected by a remote electrostatic force of the silver nanowire; an filtration effect is improved; and since the silver nanowires have a sterilization function, the composite porous fiber film material can achieve a multifunctional haze filtration effect.

The invention provides an automatic glue dispenser for a linear module rectangular coordinate. The automatic glue dispenser for the linear module rectangular coordinate comprises an electric telescopic rod, a scraper, lantern rings, a flow guide pipe, glue leakage holes, resistance heating wires, a liquid collection table and a glue liquid collection box, wherein the electric telescopic rod is mounted on the lower end surface of a glue storage tank; the scraper is mounted in the middle of the inner annular side surface of the lantern rings; the lantern rings are fixed on the lower end surfaceof the electric telescopic rod and are mounted on the outer surface of a glue dispensing head in a sleeving manner. According to design of the automatic glue dispenser, residual glue remained on the surface of the glue dispensing head of the automatic glue dispenser is quickly cleaned, and a cleaning effect is good; the glue leakage holes are formed in a glue dispensing table, the resistance heating wires are mounted in the glue dispensing table, the liquid collection table is mounted on the lower end surface of the glue dispensing table, the flow guide pipe is mounted in the middle of the lower end surface of the liquid collection table, and the glue liquid collection box is mounted on the lower end surface of the liquid collection table. According to the design, quick recycling of the residual glue is realized, and the recycling rate of the glue liquid is increased. The automatic glue dispenser for the linear module rectangular coordinate disclosed by the invention has a reasonable structure and a good treatment effect on the residual glue; moreover, the practicability is strong, and the reliability is high.

The invention discloses a silicon-based optical random waveform generation chip. The chip comprises an optical frequency comb generation module, a filter module and an amplitude phase regulating arraymodule. The optical frequency comb generation module is composed of a tunable micro-ring resonator, the filter module is composed of cascading Mach-Zehnder interferometers, and the amplitude phase regulating array module is composed of a feedback array waveguide optical grating, a variable optical attenuator and a phase shifter. Any waveform generation inside the optical frequency region can be achieved, the chip has the advantages of being small in size, low in consumption, high in stability and the like, and the key role can be brought into play in an optical communication network and system.

The invention belongs to the technical field of three-phase active power filter, in particular to a three-phase active power filter based on LCL filter and a control method thereof. Three-phase activepower filter based on LCL filter includes a three-phase inverter, an output filter and a control system. The three-phase inverter is a voltage-type inverter, and the energy storage original is a direct current capacitor; The output filter is a third-order filter, comprising an inverter-side filter inductor, a filter capacitor and a grid-side filter inductor; The control system is a current doubleclosed loop control of current detection and current feedback at the inverter side. The invention directly controls the harmonic component of the electric network current through the electric networkcurrent closed-loop control mode, thereby avoiding the detection delay and the assignment phase offset existing in the traditional load current detection method. Virtual damping is introduced to suppress the resonant peak of LCL filter through current feedback on inverter side.

The invention relates to a method for deep treatment on difficultly-degraded organic nitrogen-containing industrial wastewater and belongs to the field of industrial wastewater treatment methods. The method comprises the following steps of 1, putting a suspended filler into a moving-bed biomembrane reactor, carrying out biomembrane culture, after the biomembrane culture, inputting difficultly-degraded nitrogen-containing industrial wastewater subjected to biochemical treatment into the moving-bed biomembrane reactor, and carrying out treatment, wherein the moving-bed biomembrane reactor operates by continuous water feeding, continuous draining and continuous aeration methods, 2, inputting the wastewater treated by the moving-bed biomembrane reactor into a membrane bioreactor, wherein the membrane bioreactor is added with activated sludge and operates by the continuous water feeding, continuous draining and continuous aeration methods, and 3, through a cartridge filter, treating the wastewater treated by the membrane bioreactor, and then filtering the treated wastewater by a reverse osmosis device. According to recycle water demands, it is determined if the step 3 is adopted so that quality-classification recycle is realized.

The invention discloses a sealed culture dish which comprises a dish bottom and a dish cover which can be tightly buckled with the dish bottom, wherein the dish bottom comprises a bottom wall and dish bottom side walls; the dish cover comprises a cover wall and dish cover side walls; friction sealing devices are arranged on contact surfaces of the dish bottom side walls and the dish cover side walls, so that the air tightness of the contact surfaces can be defined. Through holes or small holes are formed in the cover wall, a micro-hole filtering membrane and a hole plug are arranged in the through hole, or a filter is arranged in the small hole through a leather collar, a structure defined according to the condition is used as a gas exchange channel, the stability of an air component in a cavity of the culture dish is maintained, the balance of internal and external air pressure is maintained, the burst of the dish bottom and the dish cover is prevented, air flowing through can be filtered, a harmful gas solution such as thallus or spore of pathogenic microorganisms in the culture dish is prevented from passing or diffusion pollution, and the security of operators is ensured.

The invention relates to a multi-beam signal interleaving DDC method based on super-speed ADC, and belongs to the technical field of microwave signal measurement. According to the method, the signal interleaving processing technology of a high-speed chip and unique parallel-structure characteristics of a multi-phase filter are utilized, and frequency mixing and filtering are carried out at the end of low data processing speed under the condition that high real-time sampling rate is maintained. Signal interleaving of the high-speed ADC chip realizes RF signal collection and ADC, serial-to-parallel processing is carried out, and thus, rapid processing is realized while space is increased.

The invention discloses a programmable power-on reset system which comprises a low-dropout regulator, an RC oscillator, a partial voltage stabilizer, an A / D converter and a counter control and judgment logic module, wherein the low-dropout regulator is used for converting a battery voltage into a supply voltage which is required by a controlled circuit, and outputting the supply voltage to the partial voltage stabilizer as a voltage to be detected; the RC oscillator is used for producing a clock signal; the partial voltage stabilizer is used for outputting partial voltage, voltage stabilization and filtration of the voltage to be detected to the A / D converter; the A / D converter is used for converting a voltage signal to be detected into a digital signal, and outputting the digital signal to the counter control and judgment logic module; the counter control and judgment logic module is used for comparing the output of the A / D converter with a programmable digital code, timing the time when the voltage to be detected is higher than a programmable power on threshold, and outputting a correct control signal according the results of timing and comparing.

The embodiment of the invention discloses an oil tank anti-theft device which is arranged on an oil filling port of an oil tank and is used for preventing fuel oil from being stolen from the oil filling port of the oil tank. The oil tank anti-theft device comprises a box body and an oil filling pipe, wherein the at least one first filter screen is arranged on at least one side wall of the box body; and the oil filling pipe stretches out of the box body from the upper top surface of the box body, one end of the oil filling pipe is provided with a detachable top cover, the other end of the oil filling pipe is connected with the box body, the interior of the oil filling pipe is communicated with that of the box body, a pipe body of the oil filling pipe is internally and detachably provided with a second filter screen, the fuel oil is filled from one end of the oil filling pipe, which is provided with the top cover, and then the fuel oil passes through the second filter screen to flow into the box body and passes through the first filter screen to flow into the oil tank. The invention also relates to an anti-theft oil tank which is provided with the oil tank anti-theft device. The oil tank of the oil tank anti-theft device and the anti-theft oil tank with the oil tank anti-theft device can realize theft prevention and filtration and can also ensure the maintenance simplicity.

The invention discloses a surface plasmon polariton type flat channel filter based on a metal-insulator-metal structure. The surface plasmon polariton type flat channel filter is composed of two metal interlayers and an insulator layer between the two metal interlayers, the insulator layer comprises alternately-arranged insulators in two kinds of refractive indexes, which form N cycles; the N cycles are same in the structure and are composed of K subcycles, each of the subcycles contains one insulator 1 with high index of refraction and one insulator 2 with low high index of refraction, and the Kth subcycle n the Nth cycle is lack of one insulator with low high index of refraction. For the N cycles, the lengths of the K insulators with high index of refraction in each cycle are increased progressively and linearly in the same rule, the consistency of dispersionloss in multiple filtering channels is improved, and the multichannel flat filtering is achieved. The surface plasmon polariton type flat channel filter based on the metal-insulator-metal structure, disclosed by the invention has important application on photo-communication and photoelectric signal processing, and miniaturization integrated photoelectronic devices and modules.

The invention discloses a low profile dipole antenna comprising an upper layer structure having a dipole, a middle layer structure, and a lower layer structure having a metal ground; the middle layer structure is provided with a semi-wavelength open circuit resonator connected with a feed structure, so the microwave signal can be coupled to the dipole, thus realizing the antenna low profile structure, developing the bandwidth, and improving the high end out of band rejection level; furthermore, the middle layer structure is provided with a short circuit branch so as to form a frequency low end radiation zero point, thus improving the antenna low end out of band rejection level, and realizing the antenna filtering function; compared with the conventional dipole antenna low profile technology, the low profile dipole antenna can realize antenna low profile design without increasing antenna sizes, and a filter function can be obtained; the bandwidth can be also improved when compared with a conventional dipole antenna of the same thickness.

The invention belongs to the technical field of atomic light filtration and particularly relates to a 1.5-micron waveband polarization pump atomic light filter. The atomic light filter makes the magneton energy level of the atomic excitation state of alkali metal to generate atomicity difference through polarization of pumping light, the atomicity difference will bring about circular double fraction, and thus incident light has the rotation effect, and the light filtering function is achieved. Specifically, the emphasis is laid on the most common 1.5-micron waveband laser signals of a communication waveband, alkali metal rubidium atoms are selected as working atoms, Rb86 is pumped from 5S1 / 2 to 5P3 / 2 with a 780-nm semiconductor laser, and the polarization pump atomic light filter of the communication waveband is manufactured through the transition from 5P3 / 2 to 4D3 / 2 of Rb87. Because light is filtered in a polarization pumping mode, the light filtering function can be achieved by the light filter without a magnetic field, a magnetic field part structure in a traditional light filter is omitted, so that the structure of the light filter is simplified, and the 1.5-micron waveband polarization pump atomic light filter can be used in special situations with no need for a magnetic field.

The invention relates to the technical field of film blowing and particularly relates to a filtering device of a film blowing machine. The filtering device of the film blowing machine comprises a first shell and further comprises a filtering part, a first clamping part, a second clamping part, a second filtering net, a second clamping groove, a first clamping groove and a first filtering net, wherein one side of the filtering part is outwards and convexly provided with a connector part and is connected with the first shell by the connector part; the first clamping part and the second clamping part are detachably clamped at the upper end of the filtering part; the second clamping groove and the first clamping groove are formed in the inner side of a bottom plate of the filtering part in an embedded manner; the first clamping net is clamped between the first clamping groove and the first clamping part; the second clamping net is clamped between the second clamping groove and the second clamping part. When the filtering device of the film blowing machine needs to be replaced, a new filtering net is prepared in advance and then the filtering net needing to be washed is taken out; the process does not stop normal work so that time is saved.

The invention discloses an automobile electric tail door ECU control main board. The automobile electric tail door ECU control main board comprises a main board body, a microprocessor arranged on themain board, an EEPROM circuit module, a high-speed CAN transceiver, a first bridge type motor drive module driving a supporting rod motor, a power supply power module, a power source reverse connection protection circuit module, a high-end voltage drive module driving a tail door unlocking motor, a second bridge type motor drive module driving a tail door self-suction motor, a debugging downloading connector facilitating peripheral equipment inserting and connecting, and a data state monitoring connector. The input end of the high-speed CAN transceiver is electrically connected with the outputend of a signal collection module. The signal collection module is electrically connected with an electric supporting rod motor Hall sensor, a tail door unlocking motor Hall sensor and a tail door self-suction motor Hall sensor. The output end of the high-speed CAN transceiver is electrically connected with the microprocessor. The ECU control main board is stable in performance, program upgradingis convenient, the maintaining cost is low, power source step control is achieved, power supply is stable, power source reverse connection protection is achieved, reliability is high, and the fault rate is low.

The invention discloses a no-reflection bandpass low-pass filter based on a transmission wire structure. The no-reflection bandpass low-pass filter comprises two absorbing resistors, a quarter wavelength terminal open end transmission line segment, a quarter wavelength terminal short-circuit transmission line segment and two input / output ports. The two absorbing resistors are placed in a close manner, The absorbing resistor is provided with one common end point and two independent end points. The quarter wavelength terminal open end transmission line segment is connected between the common endpoints of the two absorbing resistors. Two end points of the quarter wavelength terminal open end transmission line segment are respectively connected with the two independent end points of the two absorbing resistors. The two input / output ports are respectively connected with the independent end points of the two absorbing resistors. Through reasonably setting the resistance of each element, theno-reflection transmission wire type filter can be obtained, a bandpass and low-pass filtering function can be realized. The no-reflection bandpass low-pass filter is suitable for filter circuit realization in a microwave frequency range, and furthermore has advantages of low cost, easy machining property, stable performance, etc.

The invention discloses a wheat drying device for flour processing, and belongs to the technical field of flour processing equipment. The wheat drying device for flour processing comprises a heat pumpmain machine, a condenser auxiliary machine and a drying bin, wherein a heat pump main body is arranged on the outer side of the drying bin; a heating chamber is arranged in an inner cavity of the drying bin through a partition plate in a surrounding mode; a drying chamber is formed between the inner side wall of the drying bin and the partition plate; the condenser auxiliary machine is installedin the heating chamber; the top of the drying bin is fixedly connected with a centrifugal fan communicating with the heating chamber and the drying chamber; the bottom of the drying bin is fixedly connected with a collecting bin; the center of the bottom of the collecting bin is fixedly connected with a driving motor; the driving end of the driving motor is fixedly connected with a cross-shaped transmission plate through a rotating shaft arranged in the drying bin; and the end of the cross-shaped transmission plate is fixedly connected with a driven gear through a rotating cylinder. Accordingto the wheat drying device for flour processing provided by the invention, wheat is dispersed and dried after being screened and subjected to impurity removal, meanwhile, the dispersion performance of hot air in the drying chamber is improved, and the drying uniformity is improved.

The invention discloses a rotary shaft type double-cylinder distance-measuring telescope. The rotary shaft type double-cylinder distance-measuring telescope comprises a left lens cylinder, a right lens cylinder and a middle shaft, wherein a laser transmitting mechanism is arranged on the middle shaft; a laser receiving mechanism is arranged on one lens cylinder, and is rigidly connected with the lens cylinder with the laser receiving mechanism. The rotary shaft type double-cylinder distance-measuring telescope has the advantages that at the premise of not changing the basic shape of the telescope, the relative displacement between the laser transmitting mechanism and the lens cylinder with the laser receiving mechanism in the telescopic eye distance adjusting process is effectively avoided, the change of optical axes of optical systems of laser transmitting mechanism and laser receiving mechanism is avoided, and the distance can be stably, reliably and accurately measured by laser; the requirement of processing accuracy of all parts is the same as the requirement of traditional telescope product, the difficulty in production is greatly decreased, the production cost is reduced, the batched production is convenient, and the rotary shaft type double-cylinder distance-measuring telescope is suitable for being widely popularized and applied.

The invention discloses an electrooptical adjustable filter based on a sub-wavelength high-contrast grating and relates to the technical field of photoelectrons. The electrooptical adjustable filter comprises a substrate, an interdigital sub-wavelength grating, a transparent conduction layer and electrodes that are stacked sequentially from the bottom up, wherein an electrooptic material layer flush with the transparent conduction layer is arranged at an exposed part on the surface of the substrate; the two electrodes are connected with an external circuit to form an electric field between grating ridges; and a refractive index of a material of the interdigital sub-wavelength grating is much greater than those of materials of the substrate, the photoelectric material layer and the transparent conduction layer. The filter is reasonable in structural design, and can obtain high quality factor resonance and an adjustable filtration spectral range via reasonable selection of grating parameters, and tune filtration wavelength via voltage modulation; further, the refractive index of an electrooptic material is regulated based on an electric field effect; and compared with a mechanical adjustable filter, the tuning precision and tuning speed are greatly improved and increased. The filter is simple in structure, the materials are easy to obtain, and large-scale production and application are facilitated.

The invention discloses a system for collecting, storing and recycling roof rainwater and a mounting method thereof. The system comprises a rainwater harvesting device, a vertical pipe rotational flow filtering device, a rainwater collecting device and a full-automatic water taking device. The rainwater harvesting device is arranged on a roof, and the vertical pipe rotational flow filtering device, the rainwater collecting device and the full-automatic water taking device are arranged on the earth surface. The mounting method comprises the following steps that (a) the mounting position is chosen; (b) the vertical pipe rotational flow filtering device is mounted; (c) the rainwater collecting device is mounted; (d) the full-automatic water taking device is mounted; (e) the rainwater harvesting device is mounted; and (f) the system for collecting, storing and recycling the roof rainwater is debugged. According to the system for collecting, storing and recycling the roof rainwater, rainwater early-stage flow abandoning and filtering are integrated, cost is low, the occupied space is small, mounting and maintenance are convenient, pipeline blocking is avoided, and the system can be used for a long period and is free of running managing and maintenance cost; and the roof rainwater can be filtered, collected, stored and used, and run off pollution of the rainwater can be effectively controlled, so that the environment is improved.