68 results about "Parabolic reflector" patented technology

A dual passband imaging system and method of assembly, use, and construction is disclosed. The imaging system locates a visible spectrum camera inside a parabolic mirror so as to be looking through a center hole within a flat mirror, and also locates a thermal spectrum camera to view the parabolic reflector through the center hole. A parabolic reflector is arranged to direct the exact same image-data toward the thermal spectrum camera and the visible spectrum camera.

Disclosed is a ground-based radar system (1) for observing space objects (A) in orbit, the radar system (1) comprising at least one transmit antenna (2) for transmitting incident electromagnetic waves (S) and at least one cylindrical parabolic reflector (6), the cylindrical parabolic reflector (6) being fixedly mounted and comprising a reflective outer surface (7) suitable for concentrating the incident electromagnetic waves (S) into a beam of determined pointing direction (D), the reflective outer surface (7) being exposed to bad weather, the radar system (1) comprising at least one de-icing fluidic network (10) extending under the reflective outer surface (7) of the cylindrical parabolic reflector (6), the de-icing fluidic network (10) being controllable between an inactive mode (OFF), and an active mode (ON) in which a de-icing fluid (F10) flows through the de-icing fluidic network (10) in order to de-ice the reflective outer surface (7) so as to preserve the determined pointing direction (D).

The invention discloses a split-band synthetic electromagnetic wave coupling device based on Rydberg atoms. The split-band synthetic electromagnetic wave coupling device comprises an energy collecting and processing case, a millimeter wave local oscillator source, a coaxial switch matrix, a surface plasma transmission line, a microwave local oscillator source, a laser generator and a photoelectric detector. The energy collecting and processing case comprises a plurality of frequency band antennas, a waveguide magic T, a waveguide adapter, a waveguide probe and a parabolic mirror, the frequency band antennas are connected with the corresponding coaxial switch matrix and the waveguide magic T after receiving incoming wave signals, and the coaxial switch matrix is connected to a plasma transmission line channel of the surface plasma transmission line; and the waveguide magic T is connected to the waveguide adapter, and is irradiated to the atomic gas chamber above the plasma transmission line channel through the waveguide probe and the parabolic reflector. And the laser generator irradiates the atomic gas chamber and then outputs to the photoelectric detector for detection. According to the invention, the problem of integration of a plurality of coupling channels is effectively solved, and meanwhile, efficient coupling of local oscillator signals, received incoming wave signals and the atomic gas chamber is met.

The present invention relates to a rotating multi-structure spectrometer and a design method thereof, belonging to the field of spectral measurement technology. The design method comprises the following steps: determining optical system design indicators of the rotating multi-structure spectrometer; determining a detector based on the spectral range and spectral resolution; using a parabolic reflector as a collimating lens group; selecting a plane transmission grating as a light splitting device and determining the incident angle of the plane transmission grating; calculating the wavelength range and central wavelength corresponding to each structure position based on the number of preset structure positions, the spectral range, and the spectral resolution, determining the relative position of each structure position, and deriving an equation representing the axial chromatic aberration between different wavelengths at each structure position; and performing wide-band chromatic aberration correction based on the achromatic aberration equation within each wavelength band and the derived equation representing the axial chromatic aberration between different wavelengths at each structure position. The present invention enables the spectrometer to have both a wide spectrum and high resolution, thereby improving spectral measurement efficiency and reducing measurement costs.

This invention relates to the field of microwave remote sensing precision calibration technology, and particularly to a traceable microwave radiation calibration device and method based on the Rydberg atomic quantum coherence effect. The device includes: a microwave standard radiation system, a parabolic reflector (5), a Rydberg atomic electric field measurement system (1), a radiometer receiving antenna (3), a data acquisition and control system (6), and a data processing system (14). The microwave electromagnetic signal from the microwave transmitting antenna (4) is reflected by the parabolic reflector (5), so that the microwave electromagnetic signal alternately irradiates the Rydberg atomic electric field measurement system (1) and the radiometer receiving antenna (3). The interaction between the microwave electric field and a specific Rydberg energy level causes the Euler-Townes effect energy level splitting, resulting in a peak position evolution of the electromagnetically induced transparency spectrum in the atomic laser system. The data processing system (14) calculates the electric field strength and converts the electric field strength into the corresponding brightness temperature, thereby calibrating the radiometer receiving antenna (3).

A measurement method and a measurement device for profile accuracy of parabolic trough reflector are provided, which solves the problem of existing technology relying on the final assembly plant for detection and the inability to detect on the final application site, as well as the high requirements of existing optical detection device for the plant. The method and device of the present disclosure use light emitted from a light source to simulate the light emitted from the focal point of a parabolic reflector to be detected, then emitting onto the parabolic reflector to be detected. The shape and position accuracy of the parabolic reflector to be detected are measured based on the deviation of the reflected light, and it no longer rely on the final assembly plant and can detect the final profile accuracy of parabolic reflectors on the application site or after regular operation, significantly reducing costs.

A parabolic trough collector module with an absorber tube with a central axis; a parabolic reflector which focuses solar radiation onto the absorber tube and which includes a reflector surface; and a stand device, on which the parabolic reflector is pivotally mounted, the stand device having at least one stand post and the absorber tube being mounted on the stand post. In the reflector surface, the parabolic reflector has a cut-out section running perpendicularly to the longitudinal direction, and a support device extends through the cut-out section and has an absorber tube mount that forms a linear guide, on which mount the absorber tube is slidingly mounted in the longitudinal direction.

This invention relates to the field of wireless communication technology, and provides a shaped antenna reflector and a reflector antenna, having a shaped reflector surface, including a parabolic reflector surface that is at least a portion of a semi-parabolic rotator and a swept reflector surface that is at least a portion of a swept surface; the generatrix of the semi-parabolic rotator is a parabolic segment whose vertex is on the parabola, and the semi-parabolic rotator is formed by rotating the generatrix by 180° about the axis of symmetry of the parabola; the edge of the parabolic reflector has a connecting edge that is located on the same parabola as the generatrix, and the swept surface is formed by sweeping the connecting edge in a direction away from the parabolic reflector surface, and the swept reflector surface is tangent to the parabolic reflector surface at the connecting edge; the shaped reflector surface is used to reflect spherical waves emitted from the feed on the concave side of the parabolic reflector surface, the reflected beam is a deformed cosecant square beam in a first plane direction and a narrow beam in a second plane direction, the first plane direction is consistent with the direction of the central symmetry plane of the semi-parabolic rotator, and the first plane direction and the second plane direction are perpendicular.

This invention belongs to the field of precision optomechanical assembly and adjustment technology, and discloses a quantitative measurement system for the pointing accuracy of a laser sensor output beam based on a theodolite. The system includes: a laser under test, a standard cube, a small standard plane mirror, a parabolic reflector, a second optical platform, a laser photosensitive target paper, a laser target paper holder, a high-precision theodolite, a first optical platform, and a level. An off-axis imaging optical path is constructed on the first optical platform. The laser target paper is fixed to the focal plane of the parabolic reflector via the laser target paper holder. The laser under test is placed on the second optical platform, and the laser under test is adjusted so that the output beam is focused onto the laser target paper by the parabolic reflector. During measurement, after determining the laser's reference plane using the high-precision theodolite, the position of the laser's output beam spot is measured, achieving a quantitative measurement of the deviation between the laser output beam and the laser mounting base and reference plane. This invention can quickly and accurately measure errors, is easy to assemble, adjust, and test, and effectively ensures the consistency of batch products.

The present application relates to the field of laser equipment performance test, especially to a kind of laser equipment optical axis consistency and beam divergence angle combined test system and test method, test system includes off-axis parabolic reflector, photoelectric detector is arranged in its focal plane, movable target source is arranged in front of photoelectric detector, illumination device and data processor. By movable target source, different observation channel of laser equipment is provided with aiming target, and the shadow image and laser spot image of target source are collected in succession using the same photoelectric detector. Data processor calculates the deviation between different observation axes according to the shadow image, or the deviation between observation axis and laser beam optical axis;According to the laser spot image, the beam divergence angle and the optical axis stability are calculated. The present application integrates multiple test functions in the same optical path and hardware platform, realizes the efficient, compact combined test of optical axis consistency, beam divergence angle and other key indicators, significantly improves the test efficiency and saves space.

The invention provides a PDMA-based ultra-long distance speech enhancement system, which comprises a hardware acquisition end and a signal processing end, and is characterized in that the hardware acquisition end comprises a parabolic reflector and a differential microphone array, the hardware acquisition end is used for acquiring an original mixed signal, the original signal passes through the parabolic reflector to obtain a pre-enhanced signal, and the pre-enhanced signal is used for processing the pre-enhanced signal; an original signal passes through the differential microphone array to obtain a differential signal, the obtained pre-enhanced signal and the differential signal are input to the signal processing end, and the signal processing end carries out fusion processing on the received pre-enhanced signal and the differential signal to realize secondary enhancement of a target and output a target voice signal. According to the invention, the voice signal can be effectively enhanced in an ultra-long distance scene of more than 20 meters, the voice quality and intelligibility can be obviously improved, the requirements of daily communication transmission are met, the complexity of the system is reduced, the declaration cost is controlled, and the performance of the system is improved.

Parabolic trough collector module (1) with an absorber tube (3) having a central axis (A), with a parabolic reflector (5) focusing solar radiation onto the absorber tube (3) and having a reflector surface (7), wherein the parabolic reflector (5) has two longitudinal sides (5b) extending parallel to the central axis (A) of the absorber tube (3) and two end faces (5a), and with a support (9) comprising a first support (9a) and a second support, each arranged on one of the end faces (5a) of the parabolic reflector (5), wherein the parabolic reflector (5) has a support structure (11) extending along the two longitudinal sides (5b) and the two end faces (5a), wherein the parabolic reflector (5) is rotated about an axis of rotation via the support structure (11) by means of a radial bearing (10) on an upper section (9b) of the first support (9a). (D) is pivotably mounted, and with a drive device (19),which pivots the parabolic reflector (5) around the axis of rotation (D) to track the sun's position and return it to a starting position, wherein the drive device (19) comprises a drive motor (20) and an output device (22) connected to the support structure (11), the drive motor driving the output device (22) to transmit the rotational movement to the parabolic reflector (5), the output device (22) being axially mounted on a lower section (9c) of the first stator (9a) to form an axial bearing (24) for the parabolic reflector (5).

The application provides a sectional CPC solar concentrator and a design method thereof. A compound parabolic reflector is fixed in a frame. A flat plate receiving surface is a heat absorbing surface of a flat plate light receiving body. The compound parabolic reflector is symmetrically arranged on both sides of the flat plate receiving surface. The compound parabolic reflector is composed of multiple sub-reflectors. The sub-reflectors are sequentially connected in a head-to-tail mode. The focal lines of the sub-reflectors on the flat plate receiving surface are evenly arranged from the middle to both sides. The focal lines of the sub-reflectors are different and parallel to each other. The sectional design of the traditional trough type parabolic concentrator profile is adopted, so that the energy flow density on the flat plate receiving surface is evenly distributed in multiple focal lines. The uniformity of the energy flow density distribution on the flat plate receiving surface of the concentrator is effectively improved. The thermal stress concentration on the flat plate receiving surface is greatly reduced. The service life of the concentrator is effectively prolonged.

The application provides a light and small full polarization SAR satellite system based on a reflecting surface mechanism, which comprises a comprehensive electronic cabin, a load cabin, a support cabin, an antenna unfolding mechanism, a multi-polarization phased array feed, and a reflecting surface antenna. The reflecting surface antenna is a double-focus ellipsoidal parabolic reflector, the azimuth focal point and the range focal point do not coincide, and the multi-polarization phased array feed is located at the azimuth focal point. The multi-polarization phased array feed comprises N dual-polarization radiation units arranged in a column in the longitudinal direction, penetrating through the top surface of the feed shell from the inside of the feed shell, and the dual-polarization radiation unit comprises a horn radiation port, a V-polarized radio frequency connection port, and an H-polarized radio frequency connection port; and N double-channel T / R components. The SAR satellite system of the application adopts a double-focus ellipsoidal parabolic surface combined with a multi-polarization phased array feed, has scanning and shaping capabilities along the range direction while realizing full polarization function.

The invention relates to the technical field of microwave remote sensing precision calibration, in particular to a microwave radiation traceable calibration device and method based on the Rydberg atomic quantum coherence effect. The device comprises a microwave standard radiation system, a parabolic reflector (5), a Rydberg atomic electric field measurement system (1), a radiometer receiving antenna (3), a data acquisition and control system (6) and a data processing system (14), and a microwave electromagnetic signal of a microwave transmitting antenna (4) is reflected through the parabolic reflector (5); a microwave electromagnetic signal is alternately irradiated to a Rydberg atomic electric field measurement system (1) and a radiometer receiving antenna (3), and the interaction between a microwave electric field and a specific Rydberg energy level causes Eutlet-Touth effect energy level splitting, so that an electromagnetic induction transparent spectrum in an atomic laser system generates peak evolution; and the data processing system (14) calculates the electric field intensity and converts the electric field intensity into the corresponding brightness temperature, so that the radiometer receiving antenna (3) is calibrated.

The invention belongs to the technical field of material monitoring, and discloses a quantum dot material in-situ monitoring device, which comprises a shell serving as an integral protection structure of the in-situ monitoring device; the chimney is connected to the shell; the end cover is connected to the shell; the sample table is connected to the shell and is positioned below the chimney; the two lamp holders are connected to the interior of the shell and are symmetrically arranged along the center line of the sample table; the halogen lamp is connected to the interior of the lamp holder and used for irradiating the quantum dot raw materials in the sample table; the halogen lamp has the beneficial effects that the lamp holder is driven by the magnetic driving structure to move integrally, so that the halogen lamp and the abutting ring form extrusion sealing, and the problem of light source leakage caused by traditional fixed installation is solved; meanwhile, the lamp holder moves to compress the divergence angle of the halogen lamp by automatically driving the parabolic reflector to rotate, so that the light is output in a more concentrated form, and the condensation effect is greatly enhanced.

The application discloses a kind of ninety degrees off-axis parabolic reflector fiber coupling methods.The method of this application is as follows: first, the position relationship between the laser interferometer and the ninety degrees off-axis parabolic reflector is calibrated using a standard spherical mirror, then the standard spherical mirror is replaced with an optical fiber to determine the position of the Z-axis. Fix the plane mirror on the tooling of the ninety degrees off-axis parabolic reflector, so that the plane mirror is located behind the ninety degrees off-axis parabolic reflector, and the parallel light emitted by the laser interferometer can reach the parabolic mirror and the plane mirror at the same time. Adjust the angle of the plane mirror so that the light beams reaching the plane mirror and the parabolic mirror are parallel. Replace the laser interferometer with a parallel light pipe, and adjust the XY position of the optical fiber so that the spot position of the optical fiber coincides with the spot position reflected by the plane mirror, thereby confirming the position of the XY axis of the optical fiber. This method has the characteristics of simple operation and high coupling efficiency.

The invention discloses a terahertz near-field imaging light path system, and the system comprises a collimation light path group which is used for collimating a terahertz wave source which is transmitted after being gained by a horn antenna; the interference light path assembly comprises a first light path assembly and a second light path assembly, and the first light path assembly is used for transmitting a first light path to the needle tip above the sample table and receiving a local field wave beam scattered back after interaction of the sample and the needle tip; the second light path assembly is used for transmitting a second light path to the metal plane mirror and then reflecting the second light path to a beam splitter shared by the first light path and the second light path assembly for interference, and a light beam formed by interference of the first light path and the second light path is focused by a focusing lens of the focusing mirror and then enters the detector. Through reasonable arrangement of materials and lens parameters of a collimating lens, a parabolic reflector and a planar reflector in a light path, collimation and focusing of wave beams of a wave source are realized, and the light spot collimation and the light spot focusing degree are optimized.

The application provides a kind of parabolic reflector framework deployable antenna mechanism based on asymmetric four-pyramid unit, which includes rhombic, rectangular and adaptive four-pyramid unit, each asymmetric four-pyramid unit includes a central flower disc, four outer flower discs, four central connecting rods and four groups of outer connecting rods, the asymmetric four-pyramid units are connected together through shared outer flower discs and outer connecting rods, and are connected through inner connecting rods and boundary connecting rods to form a single-degree-of-freedom parabolic reflector framework deployable antenna mechanism, and the height difference formed by the asymmetric four-pyramid units is used to construct a parabolic reflector.The deployable antenna mechanism of the application only contains a single degree of freedom, has the advantages of simple structure, easy-to-control deployment process, high deployment reliability, high degree of structural symmetry and good expansibility, and can form a parabolic reflector framework deployable antenna mechanism with any size and any curvature by changing the number of asymmetric four-pyramid units, the length of each connecting rod and the offset angle of the central connecting rod.

The present invention relates to the technical field of satellite signal receivers, and specifically discloses a device and method for receiving data communication signals, comprising: a base and an adjustment mechanism, wherein the adjustment mechanism is disposed in the inner cavity of the base; two first motor protection covers are disposed at the upper and lower ends of the rear side of the base; the bottom end of a steering rod is disposed at the top end of the adjustment mechanism; the rear side of a U-shaped bracket is fixedly sleeved on the top end of the outer wall of the steering rod; and a conversion mechanism is disposed in the inner cavity of the U-shaped bracket. When the device is in use, the high-frequency head at the focus of the parabolic reflector can be adjusted according to the TV program being watched, thereby increasing the reception strength of the satellite signal and enhancing the user's experience. At the same time, the device can automatically adjust the angle of the parabolic reflector, reducing the need for manual adjustment, thereby reducing the waste of labor resources and improving work efficiency.

Acoustic locating and tracking device for flying objects, comprising two parabolic reflectors (1a, 1b), each with two microphones (2a-2d) for detecting acoustic signals, a mechanical swiveling device (3), a control unit (4) and an evaluation unit (5), characterized in that by comparing the four microphone signals both a horizontal and a vertical direction angle is calculated and a three-dimensional vector to the sound source is determined from this.

The utility model discloses a portable flashlight which comprises a head cover, a flashlight body, a tail cover, a light source assembly, a battery and a control assembly, and is characterized in that the light source assembly comprises a main lamp light source, a colorful light source, a COB light source and a parabolic reflection cup, the colorful light source is arranged on the periphery of the main lamp light source in a surrounding mode, and the COB light source and the parabolic reflection cup are arranged below the main lamp light source. The control assembly comprises a driving plate and a conductive part, the driving plate is arranged in the flashlight body, the conductive part is arranged in the center of the driving plate, and the conductive part is in contact with the battery electrode. According to the LED lamp, the requirement for illumination diversification is met, the battery can be detached and replaced, meanwhile, different electrode structures of a plane battery and a convex top battery can be automatically adapted through the conductive piece additionally arranged on the driving plate, a user does not need to distinguish battery types deliberately, and use convenience is greatly improved.

A dual passband imaging system and method of assembly, use, and construction is disclosed. The imaging system locates a visible spectrum camera inside a parabolic mirror so as to be looking through a center hole within a flat mirror, and also locates a thermal spectrum camera to view the parabolic reflector through the center hole. A parabolic reflector is arranged to direct the exact same image-data toward the thermal spectrum camera and the visible spectrum camera.

This invention discloses a design method for a Fresnel-type composite parabolic cylindrical reflector antenna, applicable to the field of microwave energy space transmission, and particularly suitable for use as a large-size antenna operating at a fixed point frequency. The antenna utilizes a parabolic segment between the origin and point B0, and point B... n With point D n The straight line segment between them, and point D n With point B n+1 The parabola segment between and point B N‑1 The straight line segment between point E and point D and point E and point D N The straight segments between them form a composite curve. Extending along the curve's normal with the composite curve as the generatrix, a Fresnel-type composite parabolic cylindrical reflector antenna is obtained. When it needs to be used in an offset-feed mode, a portion of the surface can be truncated according to actual needs. By replacing the ordinary parabolic cylinder with a Fresnel composite parabolic cylinder, the overall thickness of the parabolic cylindrical reflector antenna is reduced, enabling the segmentation, splicing, and folding of large-size parabolic reflector cylinders. This significantly reduces the processing difficulty and cost of large-size parabolic cylindrical reflector antennas, while also facilitating transportation, assembly, debugging, and adjustment.

Corrective meta surface lens is used to reduce the illumination and spill-over losses and improve the overall efficiency of a parabolic antenna when is horn-mounted, and / or top-mounted, and / or deposited directly on the frontal reflector surface of the parabolic antenna. For the horn-mounted model, a meta surface lens is placed in front of or in the aperture of the feed horn to reduce side lobe level, which results in lower parabolic antenna spill-over losses and overall efficiency improvement by more than 40% (1.5 dB). For the top-mounted model, the meta surface lens is mounted on top of (or above) the parabolic reflector, which results in reduction in illumination losses, and greater than 70% (2.5 dB) efficiency. The meta surface lens has a wideband response, is lightweight and has a lattice structure which makes it a great candidate for withstanding wind forces.

The utility model discloses an emergency communication antenna, and specifically relates to the technical field of communication antennae, the emergency communication antenna comprises a parabolic reflector and a feed source arranged at the top of the parabolic reflector, the emergency communication antenna also comprises a protection assembly used for protecting the parabolic reflector and the feed source, the protection assembly comprises a base, the top of the base is hinged with four sealing plates, and the sealing plates are arranged on the base. Each sealing plate is provided with a connecting plate, the bottom of the parabolic reflector is detachably connected with a connecting block, a rotating rod fixedly penetrates through the interior of the connecting block, and the top of the base is provided with a driving mechanism used for driving the rotating rod to rotate. The angles of the parabolic reflector and the feed source are automatically adjusted through the driving mechanism, so that the arrangement efficiency of the communication antenna can be improved, meanwhile, the base and the four sealing plates are arranged to wrap the parabolic reflector and the feed source in a matched mode, the safety of the parabolic reflector and the feed source can be improved, and the four sealing plates and the base can be used as a support. And a supporting effect is achieved, so that the convenience can be improved.

The invention belongs to the technical field of applied optics, and particularly relates to a multi-sensor photoelectric equipment optical axis consistency detection and correction device and method. The detection and correction device is used for multi-sensor photoelectric equipment and comprises an off-axis parabolic mirror collimator, an auto-collimation front lens, a short-wave infrared camera, a laser color development cross plate, a heat source plate, a strong light source, a rhombic prism, a dichroic mirror and an image processing and control system. According to the invention, optical axis consistency detection and calibration can be carried out on photoelectric equipment comprising an infrared imaging system, a television imaging system, a laser irradiation system and a laser receiving system at the same time, the equipment does not need to be disassembled in the whole process, and the device has the advantages of high efficiency and various compatible sensors; by introducing an image processing and control program based on pixel point identification, the optical axis deviation after correction of each sensor is less than one pixel, and the correction precision is greatly improved.

This invention discloses an infrared weak light radiation calibration device and method for optoelectronic reconnaissance equipment, belonging to the field of optoelectronic technology. The calibration device includes an infrared light source system, an infrared beam transmission channel, the optoelectronic reconnaissance equipment under test, a vacuum interface, a vacuum enclosure, a first off-axis parabolic reflector, a field stop, a second off-axis parabolic reflector, a filter, a third off-axis parabolic reflector, a blocking impurity band detector, a pulse tube cooler, and a vacuum pump unit. The blocking impurity band detector of this invention has advantages such as high sensitivity, large array size, wide detection spectrum, and fast response speed; it can achieve picowatt-level optical radiation power measurement and calibration, and its unique performance is widely used in fields such as space imaging; using the blocking impurity band detector as a value transfer detector can improve measurement accuracy, reduce the influence of standard light source power fluctuations, and improve measurement accuracy.

The invention provides a terahertz antenna array with low cost, low cross polarization and high gain. The terahertz antenna array comprises a metal waveguide feed layer and a radiation array layer, the metal waveguide feed layer comprises a feed waveguide, an E-plane T-shaped junction, two offset waveguides and two differential excitation plane parabolic reflectors, the feed waveguide is used for vertical feed, the E-plane T-shaped junction is connected with the feed waveguide and the two offset waveguides, the two offset waveguides are located at the focal points of the two plane parabolic reflectors respectively, and the two plane parabolic reflectors are connected with the E-plane T-shaped junction. The two plane parabolic reflectors are in mirror symmetry, the reflecting surfaces of the plane parabolic reflectors are paraboloids, and the short-circuit surfaces are the short-circuit ends of the plane parabolic reflectors; the radiation array layer is used for coupling and radiating energy from the metal waveguide feed layer. Two plane parabolic reflectors which are distributed in a mirror image mode and feed in a differential mode are arranged in the metal waveguide feed layer, the high-gain characteristic can be achieved, and the whole antenna array can keep extremely low cross polarization.