17results about How to "Implement reflection" patented technology

The invention discloses an optical module which comprises a circuit board and a lens assembly, and a first sealing piece is arranged between the lens assembly and the circuit board. One end of the first lens assembly is provided with a wrapping cavity. A light port groove, a blocking piece and a third sealing piece are arranged on the light source module, the third sealing piece is located on the outer side wall of the blocking piece, the blocking piece covers the light port groove, and the light port groove is provided with a reflecting surface; the optical fiber bracket is fixed in the wrapping cavity; the first end face of the optical fiber support is buried in the wrapping cavity, a second sealing piece is arranged between the optical fiber support and the wrapping cavity, the wrapping cavity is provided with a first air hole, the spreading range of the second sealing piece in a gap between the top face of the optical fiber support and the wrapping cavity does not exceed the first air hole, and a twelfth sealing piece is arranged in the first air hole. According to the cooling device, the twelfth sealing piece is arranged in the first sealing piece, the second sealing piece, the blocking piece and the first air hole, so that cooling liquid is isolated; the sealing glue is isolated by embedding the first end face of the optical fiber support in the wrapping cavity.

The invention belongs to the technical field of frequency selective surface radomes, and particularly relates to a frequency selective surface-based low-frequency wave-transparent and high-frequency reflection device and a satellite radome, which sequentially comprise a first low-pass layer, a first dielectric isolation layer, a first band-stop layer, a second dielectric isolation layer and a second low-pass layer from top to bottom, the first low-pass layer and the second low-pass layer are the same in structure, and each of the first low-pass layer and the second low-pass layer comprises first metal patch patterns which are periodically arranged; each first metal patch pattern is composed of four square ring patterns and a cross-shaped pattern, and the four ends of the cross-shaped pattern are connected with the four square ring patterns respectively; and the first band stop layer comprises second metal patch patterns which are periodically arranged. The novel low-pass layer / band-stop layer pattern multilayer structure is constructed, the effects of ultra-wideband low-frequency wave transmission and high-frequency reflection are achieved under the condition that the thickness is sacrificed, the problem that in-band ultra-wideband wave transmission and out-of-band ultra-wideband reflection are difficult to give consideration to in-band ultra-wideband wave transmission and out-of-band ultra-wideband reflection at the same time in existing frequency selection is effectively solved, and then normal work of a satellite antenna housing is guaranteed.

The invention relates to a multi-absorption-band ultra-wideband common-mode filter based on a mixed resonator structure. The multi-absorption-band ultra-wideband common-mode filter comprises a coupling microstrip line, a dielectric substrate, a main resonator, an auxiliary resonator and a resistor, the filter has an upper surface and a lower surface, and a coupling microstrip line comprises a metal conduction band located on a dielectric substrate and a metal ground layer located below the dielectric substrate; two ends of the coupling microstrip line are respectively connected with the input port and the output port; the main resonator is etched in the middle of the metal ground layer; the auxiliary resonator is etched on the outer side of the main resonator in the metal ground layer; the coupling microstrip line is mutually coupled with the main resonator and the auxiliary resonator to realize mixed resonance; the resistor crosses the gap of the auxiliary resonator at the intersection of the auxiliary resonator and the symmetric line, and the two ends of the resistor are connected with the metal ground layers inside and outside the metal conduction band; according to the invention, the ultra-wideband common-mode suppression bandwidth and a plurality of absorption bands are provided, and the absorption bands dissipate common-mode noise in the form of heat energy, so that the problem of potential common-mode electromagnetic interference in the system is reduced, and normal transmission of differential-mode signals is not damaged at the same time.

The utility model provides an intelligent interference skin based on a reconfigurable metasurface. The intelligent interference skin comprises an incident wave direction sensor, an FPGA controller, a signal generator, a power amplifier and the reconfigurable metasurface which are connected in sequence. The reconfigurable metasurface comprises a dielectric substrate, a plurality of metal patches and diodes, wherein the metal patches are arranged on the dielectric substrate and are of the same structure, and the diodes are arranged on the metal patches respectively. The eight metal patches are divided into two groups, each group comprises a first patch, a second patch, a third patch and a fourth patch, one group is arranged clockwise according to the sequence number, the other group is arranged anticlockwise according to the sequence number, and the two groups of metal patches are connected end to end. And the diodes on the two groups of metal patches are correspondingly conducted and are respectively used for generating adjustable phases of 0 degree, 90 degrees, 180 degrees and 270 degrees. According to the utility model, the anti-reflection of incident electromagnetic waves is realized, and the frequency of echoes is changed, so that the signal received by the own detector can be enhanced without influence, and interference on the enemy detector is realized at the same time.

The utility model discloses a transverse excitation bulk acoustic wave resonator and a filter, and relates to the technical field of resonators. The transverse excitation bulk acoustic wave resonator comprises a substrate, an insulating layer arranged on the substrate, a piezoelectric layer arranged on the insulating layer and an interdigital electrode arranged on the piezoelectric layer, the interdigital electrode comprises two electrode structures which are oppositely arranged, each electrode structure comprises a busbar and a plurality of electrode strips which are connected to the same side of the busbar in parallel in the first direction, and a gap area is formed between the electrode strip of one electrode structure and the busbar of the other electrode structure; the transverse excitation bulk acoustic wave resonator further comprises a phononic crystal structure located on the substrate and arranged in the gap area, the phononic crystal structure comprises a plurality of phononic crystal parts arranged in a matrix mode, the phononic crystal parts are arranged in M columns in the first direction and arranged in N rows in the second direction, M is an integer larger than or equal to 3, and N is an integer larger than or equal to 0. According to the transverse excitation bulk acoustic wave resonator, the mechanical quality factor of the resonator can be improved, and the stray mode can be suppressed.

This application discloses an optical parametric oscillator and a laser generating device, relating to the field of laser technology. The optical parametric oscillator includes a first optical fiber, a mirror assembly, a nonlinear crystal, and a second optical fiber. The first optical fiber has a first receiving end and a first output end. The first receiving end is used to receive pump light. The second optical fiber has a second receiving end and a second output end. Light output from the first output end can be transmitted to the second receiving end via the mirror assembly and the nonlinear crystal. The second output end is used to output signal light. The mirror assembly includes multiple mirrors. The nonlinear crystal is located in the optical path between two mirrors. A first grating is disposed on the first optical fiber, and a second grating is disposed on the second optical fiber. Both the first and second gratings are fiber Bragg gratings. Because this application uses a first optical fiber and a second optical fiber to define the light transmission path, compared to a free-space optical path, the optical fiber can be coiled, which is beneficial for reducing the overall size and improving integration.

The utility model discloses a hot bending machine heating device with an IR lamp as a heat source. The hot bending machine heating device comprises a lamp tube, a lampshade is arranged above the lamp tube, a mounting plate is arranged above the lampshade, and a cooling mechanism is arranged in the lampshade. A screw is arranged in the middle of the upper end of the mounting plate, a lifting plate is arranged on the screw, the middle of the lifting plate is matched with the screw, and a lifting rod is fixedly connected to the end of the lifting plate and penetrates through the mounting plate to be connected with the lampshade; the hot bending machine heating device with the IR lamp as the heat source is reliable in use, even in temperature distribution and capable of improving product quality.

The invention provides a virtual reality system. The virtual reality system comprises a first optical system and a second optical system, the first optical system comprises a first optical lens group, a second optical lens group and a third optical lens group, and the second optical system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens; when the following conditions are satisfied: f2'gt; f ', the axial distance TD' from the first side surface of the first lens of the first optical system to the second side surface of the last lens, the air interval T12'of the first lens and the second lens of the first optical system on the first optical axis, and the air interval T23 'of the second lens and the third lens of the first optical system on the first optical axis satisfy: 7lt; tD ' / (T12' + T23 ') lt; 12, the effective focal length f1'of the first optical lens group of the first optical system and the effective focal length f1 of the first lens of the second optical system meet the following conditions:-44lt; f1 ' / f1lt; and-26. The problems that in the prior art, a virtual reality system is large in size, and the field angle of a perspective system is small are solved.

This invention provides a three-dimensional heat-reflective thermal insulation material and its preparation method, belonging to the field of functional textile technology. The preparation method includes the following steps: bonding a heat-reflective metal foil layer to one surface of a flexible textile substrate, the heat-reflective metal foil layer comprising a heat-reflective functional layer of metal and / or metal oxide; then embossing the heat-reflective metal foil layer with a three-dimensional embossing roller to obtain the three-dimensional heat-reflective thermal insulation material; the surface of the three-dimensional heat-reflective thermal insulation material has a three-dimensional pattern with a uniform closed pattern array. The heat-reflective metal foil layer on the surface of the flexible textile substrate of this invention can effectively reflect its own infrared radiation, ensuring a smaller thickness while improving the thermal insulation effect; moreover, its specific three-dimensional pattern structure further improves the thermal insulation performance. The thermal insulation material of this invention can be very thin, thus maintaining the comfort of clothing and other application products.

The invention provides an ultrasonic transducer, an ICE ultrasonic probe for generating multiple ultrasonic section images and equipment. The ultrasonic transducer comprises a control mechanism and an ultrasonic channel switching unit, the ultrasonic channel switching unit is composed of an acoustic transmission material layer and N different types of morphological change material layers; the N morphological change material layers and the acoustic transmission material layer are arranged in sequence, reflecting surfaces with different inclination angles are formed between the adjacent material layers, and under different morphologies of the target morphological change material layer, an ultrasonic signal passes through a target reflecting surface or is reflected by the target reflecting surface to form different emission echo paths; the control mechanism is used for controlling each morphological change material to be in different morphologies at different time points, so that the ultrasonic signals at different time points detect the target tissue through different emission echo paths to generate a plurality of ultrasonic section images of the target tissue at different angles. According to the invention, a plurality of ultrasonic section images at different angles can be displayed at the same time, and the comprehensiveness and efficiency of inspection are remarkably improved.

The utility model discloses a transparent reflective optical system, which comprises a line light source system and an imaging system, the line light source system comprises a collimation unit and a reflection unit, in a vertical plane, the contour line of the reflection unit is a first parabola, the focus of the first parabola is located at the F point, the reflection unit is located in the light emitting direction of the collimation unit, the reflection unit is used for totally reflecting light emitted by the collimation unit, and in the vertical plane, the reflection unit is located at the F point. Reverse extension lines of the reflected light rays converge at a point F. The imaging system is provided with a total reflection surface which is located in the light emitting direction of the reflection unit, the section of the total reflection surface is of a V-shaped structure, the focal point of the imaging system is located at the point F in a vertical plane, and the imaging system is used for imaging a line light source passing through the point F. The utility model has the advantages that the use of an aluminum plating process is avoided, the optical efficiency and the optical performance are improved, and the production cost is reduced.

The application relates to the technical field of photoelectric communication, in particular to a high-low rate mutually compatible PWDM optical device which comprises a first controller, one end of the first controller is provided with a second controller, a transmission mechanism is connected between the first controller and the second controller, a processing mechanism is installed at one end of the first controller, and a mounting mechanism is installed on the first controller; through the installation of the transmission mechanism and the first controller and the second controller, data can be processed, optical signal receiving and sending can be realized, high-speed data transmission can be realized while the compatibility of low-speed data transmission is reserved, thereby meeting the experience of mutual use of two rates of users, through the installation of the processing mechanism, different optical signals can be further processed, the stability of data transmission can be realized, through the connection of the mounting mechanism, the equipment can be conveniently installed, operation is more convenient, and the equipment can work more stably.

The present invention discloses a reflective laser cleaning device suitable for small-sized metal pipes, comprising a front shell, a rear shell and a metal pipe, a central axis is arranged at the bottom of the rear shell, the bottom of the central axis is connected to the front shell, a compression spring is fixedly installed on one side of the inner wall of the central axis, and one end of the compression spring is rotatably connected to a spring lifting wheel. The present invention relates to the technical field of pipeline cleaning equipment. The reflective laser cleaning device suitable for small-sized metal pipes transmits a laser beam to a laser emission port through an optical fiber, and the laser emission port transmits the laser beam to a reflector, which is reflected by the reflector and focused on the inner wall of the metal pipe to be cleaned, and the reflective laser is used to clean the inner wall of the object to be cleaned, thereby improving the cleaning quality and cleaning efficiency of the laser, and the control system is used to control the action of the laser and the laser cleaning device.

The invention discloses a preparation method of a functional fabric and a knapsack assembled by the functional fabric, and belongs to the technical field of fabric preparation. A flexible continuous interface is constructed through PA latex, Cu2O antibacterial particles form a semi-embedded fixed structure, composite optical microspheres can be stably attached and orderly assembled, and the attachment firmness and surface functional activity of a functional layer are considered; through evaporation-induced self-assembly of the monodisperse composite optical microspheres, a periodic microstructure is formed on the surface of the fabric, so that a stable structural color is generated; a DA3261-dopamine conjugate and TPU are compounded and subjected to ultraviolet polymerization to form a temperature-sensitive layer, so that the outer surface of the knapsack has visual thermal response capability, the temperature-sensitive layer starts to have obvious color change at 35 DEG C and turns from bluish violet to amaranth at 40 DEG C, the comprehensive chromatic aberration delta E reaches 28.7, the delta E exceeds 30 at 45 DEG C or above, and the knapsack shows remarkable temperature early warning capability.

The invention discloses a military anti-infrared electromagnetic shielding intelligent stealth fabric, and relates to the technical field of intelligent fabrics, the military anti-infrared electromagnetic shielding intelligent stealth fabric comprises an aramid fiber base layer, an electromagnetic shielding layer, an anti-infrared composite layer, a functional layer and an induction adjustment integration module, the outer side of the aramid fiber base layer is provided with the electromagnetic shielding layer, and the electromagnetic shielding layer is arranged on the outer side of the functional layer; an anti-infrared composite layer is arranged on the outer side of the electromagnetic shielding layer, and an induction adjustment integrated module is arranged on the outer side of the aramid fiber base layer. The anti-infrared composite layer is arranged on the outer side of the electromagnetic shielding layer, graphene forms an isolation layer to reflect infrared rays emitted by a human body and effectively guide energy of electromagnetic waves so as to achieve electromagnetic shielding, and diethylene glycol monobutyl ether is beneficial to uniform dispersion of graphene in the water-based acrylic emulsion; the titanium oxide powder with low emissivity and the cobalt ion doping amount of 1.3% is selected for the infrared stealth layer, infrared radiation is reduced, and it is avoided that the infrared stealth layer is found by an infrared detector.

The utility model relates to the technical field of building wallboards, and discloses a wallboard with a noise reduction function, which comprises a mounting wallboard, a metal isolation board is mounted on the inner side of the mounting wallboard, a first sound insulation board is mounted on the inner side of the metal isolation board, a vacuum board is mounted on the inner side of the first sound insulation board, and a second sound insulation board is mounted on the inner side of the vacuum board. A first sound insulation plate is installed on the inner side of the metal isolation plate, a second sound insulation plate is installed on the inner side of the vacuum plate, and the second sound insulation plate, the vacuum plate and the first sound insulation plate are all arranged in the installation wall plate, and according to the wall plate with the noise reduction function, through arrangement of the metal isolation plate, the first sound insulation plate, the vacuum plate and the second sound insulation plate, reflection and absorption of sound waves with different propagation frequencies in the environment are achieved; most noise can be absorbed and filtered, the sound insulation and noise reduction effects of the device are greatly improved, and noise interference is reduced.

The utility model discloses aluminum foil detection equipment with a deviation rectifying mechanism, which relates to the technical field of aluminum foil detection and comprises an equipment base and an aluminum foil tape, a positioning sleeve is fixedly mounted on the equipment base, and the deviation rectifying mechanism is mounted on the positioning sleeve. The deviation rectifying mechanism comprises a telescopic column slidably mounted in the positioning sleeve and an adjusting lead screw rotatably mounted in the positioning sleeve, the adjusting lead screw is mounted on a lead screw nut in a threaded mode, a rotating base is rotatably mounted at the upper end of the telescopic column, and a detection mechanism is fixedly mounted on the rotating base. The deviation rectifying mechanism further comprises a servo motor fixedly installed on the equipment base, a small gear is fixedly installed at the output tail end of the servo motor, and a large gear is fixedly installed at the lower end of the adjusting lead screw. According to the aluminum foil detection equipment with the deviation rectifying mechanism, the deviation rectifying mechanism can adjust the detection box body, the quality of a shot picture is guaranteed, and the detection mechanism can detect the two faces of an aluminum foil only through one set of CCD cameras.