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113 results about "Parabolic reflector" patented technology

A parabolic (or paraboloid or paraboloidal) reflector (or dish or mirror) is a reflective surface used to collect or project energy such as light, sound, or radio waves. Its shape is part of a circular paraboloid, that is, the surface generated by a parabola revolving around its axis. The parabolic reflector transforms an incoming plane wave traveling along the axis into a spherical wave converging toward the focus. Conversely, a spherical wave generated by a point source placed in the focus is reflected into a plane wave propagating as a collimated beam along the axis.

Single crystal optical fiber growing device based on hollow pentagonal prism

The invention belongs to the field of single crystal optical fiber preparation, and discloses a single crystal optical fiber growth device and method based on a hollow pentagonal prism. A beam splitter prism; a beam expanding system; a planar mirror; two spatial light debuggers; self-manufacturing a hollow pentagonal prism; a parabolic mirror; a rotating electrical machine system. According to the invention, the SLM is used for replacing a large-size conical lens, so that the light path adjustment difficulty is reduced; the beam splitter prism is introduced into the optical system, so that various single crystal optical fibers with different diameters can be grown at the same time, and the production efficiency is improved; the hollow pentagonal prism is used as a reflector of an optical system, so that the stability of an optical path is improved, and the high-quality single-crystal optical fiber is obtained.
Owner:HUBEI UNIV OF AUTOMOTIVE TECH

Optical fiber coupling type focusable laser cutting device

The invention relates to an optical fiber coupling type focusable laser cutting device. According to the device, a laser transmitter transmits laser through an input optical fiber; the laser receiving module comprises a mounting seat, an optical fiber base, a transmission mechanism and a focusing mechanism, the focusing mechanism drives the optical fiber base to move in the axial direction through the transmission mechanism, and motor-free focusing in the nuclear radiation environment is achieved; the laser conduction module comprises a parabolic reflector for collimating and focusing the laser; according to the laser cutting device, the focusing technology depending on a motor in the prior art is converted into full-mechanical transmission focusing design, the failure risk of electronic elements such as the motor in the radiation environment is avoided, and through cooperation of the focusing mechanism, the transmission mechanism and the limiting pin, the laser cutting efficiency is improved. The high-precision and high-reliability focusing function is achieved, and the laser cutting device which is good in radiation resistance, high in long-term operation stability and long in service life is achieved in the nuclear radiation environment.
Owner:GUANGDONG GUOZHI PHOTONICS TECH CO LTD

COB (Chip On Board)-based lensless laser gas sensing module as well as packaging method and application

The invention discloses a COB-based lensless laser gas sensing module and a packaging method. The COB-based lensless laser gas sensing module comprises a COB board and a lensless light path module covering the COB board, the lensless light path module comprises a module shell, an inner cavity of the module shell is provided with a first parabolic reflector, a second parabolic reflector and a communicated light beam channel, and the module shell, the parabolic reflectors and the light beam channel form a detection gas chamber; a laser beam emitted by the laser chip is reflected by the first parabolic reflector to form approximately collimated light, and the approximately collimated light passes through the light beam channel and is focused on the photosensitive surface of the detector through the second parabolic reflector. According to the invention, the bare chips of the laser chip and the detector chip are directly bonded on the PCB, and are matched with the light path combination member with the two correlation type parabolic reflectors, so that interference noise caused by the lens is eliminated; the optical path is only composed of the COB board, the three-in-one sensing module and the protective cover, so that the production and assembly complexity is greatly reduced, and the assembly precision and stability of the optical path are improved.
Owner:GUANGDONG LASER SENSOR TECH CO LTD +2

Dual-band panoramic camera system

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.
Owner:PILGRIM BOB

Offset-fed reflector parallel plate antenna apparatus

An antenna apparatus described herein includes a first reflector element that comprises a first nonresonant waveguide cavity that is partially bounded by a first parabolic reflector surface. The apparatus optionally includes additional reflector elements arranged in parallel with the first reflector element, where the additional reflector elements include corresponding nonresonant waveguide cavities that are partially bounded by corresponding reflector surfaces. The antenna apparatus is configured to emit an electromagnetic signal based upon electromagnetic signals reflected by the one or more parabolic reflector surfaces and output by the one or more reflector elements. The antenna apparatus may conversely be employed to receive an electromagnetic signal.
Owner:NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA LLC

Radar system and method for de-icing its cylindrical parabolic reflector

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).
Owner:LOOK UP SPACE

Rydberg atom-based frequency-band synthetic electromagnetic wave coupling device

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.
Owner:THE 41ST INST OF CHINA ELECTRONICS TECH GRP

A rotating multi-structure spectrometer and its design method

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.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

A microwave radiation traceable calibration device and method based on the Rydberg atomic quantum coherence effect

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).
Owner:NAT SPACE SCI CENT CAS

Reconfigurable reflector for biconical antenna

An apparatus comprising a biconical antenna for generating an omnidirectional beam pattern is presented. A reflector reflects the omnidirectional beam pattern from the biconical antenna into a predetermined beamform. The reflector comprises a ground plane connected to the biconical antenna and a parabolic reflector extending from the ground plane at a predetermined angle. A curvature of the parabolic reflector reflects the omnidirectional beam pattern into the predetermined beam form. The predetermined angle corrects for beam shift of the predetermined beam form caused by the ground plane.
Owner:MASSIVE LIGHT LLC

Detection method for measuring profile accuracy of parabolic trough reflectors and detection device thereof

PendingUS20260085859A1Solar heating energyUsing optical meansEngineeringApplication site
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.
Owner:HARBIN QINGYUFENG TECHNOLOGY CO LTD

Parabolic trough collector module, parabolic trough collector module unit, and solar thermal power plant

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.
Owner:DEUTSCHES ZENTRUM FÜR LUFT UND RAUMFAHRT E V

Shaped antenna reflectors and reflector antennas

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.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

Quantitative Measurement System for the Pointing Accuracy of Laser Sensor Output Beam Based on Theodolite

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.
Owner:西安应用光学研究所

Laser equipment optical axis consistency and beam divergence angle combined test system and test method

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.
Owner:CHINESE PEOPLES LIBERATION ARMY UNIT 32201

Ultra-long distance speech enhancement system based on PDMA

PendingCN121905204Aquality improvementimprove intelligibilitySpeech analysisIntelligibility (communication)Testing Methods
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.
Owner:TIANJIN UNIV

Parabolic trough collector module and parabolic trough collector unit

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).
Owner:DEUTSCHES ZENTRUM FÜR LUFT UND RAUMFAHRT E V

A segmented CPC solar concentrator and a method of designing the same

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.
Owner:INNER MONGOLIA UNIV OF TECH

Optical splitter for laser surgical systems with overheating protection

Systems, devices, and methods for identifying a target in vivo are disclosed. A target identification system for use in electrosurgery includes a probe, an optical splitter, and a spectroscopy system. The probe includes an optical pathway to pass a first optical signal to an anatomical target and at least a portion of a second optical signal from the anatomical target. The optical splitter includes a first port to direct the first optical signal to the optical pathway and to receive the at least a portion of the second optical signal from the optical pathway, a second port to receive the first optical signal, and a parabolic reflector to redirect the portion of the second optical signal. The spectroscopy system can identify a characteristic of the anatomical target based on the redirected at least a portion of the second optical signal.
Owner:GYRUS ACMI INC

Lightweight and small full polarization SAR satellite system based on reflector mechanism

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.
Owner:AEROSPACE DONGFANGHONG SATELLITE

Three-dimensional imaging optical system for civil small unmanned aerial vehicle

The invention is applicable to the technical field of optical imaging, and provides a three-dimensional imaging optical system for a civil small unmanned aerial vehicle, which consists of a spherical positive lens, two groups of doublet spherical lenses, a diaphragm, a convex spherical reflector and a concave parabolic reflector, the two groups of doublet spherical lenses comprise a first doublet spherical lens and a second doublet spherical lens; according to the invention, high-resolution imaging can be realized under multiple wavelengths, rich spectral information is provided for a user, and more accurate analysis and judgment of a target area are facilitated. The compact design enables the system to be small in size and light in weight, is very suitable for being mounted on a low-altitude civil small unmanned aerial vehicle, and expands the application range and operation capability of the civil unmanned aerial vehicle. The three-dimensional imaging function can obtain three-dimensional information of a target area, has important application value in the fields of geographic surveying and mapping, urban planning and the like, and can provide more comprehensive and accurate data compared with a traditional imaging mode.
Owner:CHANGCHUN UNIV OF SCI & TECH

Microwave radiation traceable calibration device and method based on Rydberg atomic quantum coherence effect

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.
Owner:NAT SPACE SCI CENT CAS

Quantum dot material in-situ monitoring device

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.
Owner:XINYANG GUMAI OPTRONICS CO LTD

Energy-gathering wireless charging primary coil structure and coil device based on parabolic reflection

The invention provides an energy-gathering wireless charging primary coil structure based on parabolic reflection and a coil device. The parabolic reflector can reflect and converge electromagnetic waves generated by the primary coil and is deformable, the edge of the parabolic reflector is fixed to the coil frame, and the middle of the parabolic reflector is connected to the support through the reflector control assembly. The reflecting piece control assembly controls the reflecting piece to change the shape so as to adjust the focus of the paraboloid and is connected between the support and the paraboloid reflecting piece. A coil frame on which a plurality of primary coils are arranged is connected to the bracket. According to the wireless charging device, the electromagnetic waves generated by the primary coil are reflected by the reflecting part and are converged to the maximum at the position of the secondary coil, so that the energy-gathered charging effect is achieved, the charging efficiency and the transmission distance of wireless charging are improved, and efficient wireless electric energy transmission can also be achieved at middle and long distances; the reflector control assembly can change the shape of the parabolic reflector, thereby adjusting the focus of the paraboloid, and enabling the device to be suitable for wireless power transmission at different distances.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

A method of fiber coupling for a ninety degree off-axis parabolic mirror

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.
Owner:SHANGHAI INSTITUTE OF TECHNICAL PHYSICS CHINESE ACADEMY OF SCIENCES

Terahertz near-field imaging light path system

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.
Owner:INST OF ENERGY HEFEI COMPREHENSIVE NAT SCI CENT (ANHUI ENERGY LAB)

Laser transmitting and receiving main optical system

The invention discloses a laser transceiving primary optical system, which relates to the field of laser communication and comprises a diaphragm, a primary mirror and a secondary mirror. The primary mirror and the secondary mirror are both parabolic reflectors; the center of a clear aperture of the diaphragm is a main optical axis; the laser incident along a primary optical axis is incident to the primary mirror through the diaphragm; the laser reflected by the primary mirror forms a primary image surface; the primary image plane is located between the primary mirror and the secondary mirror; the laser passing through the primary image surface is reflected by the secondary mirror to form a secondary optical axis; an exit pupil perpendicular to the secondary optical axis is formed in the direction of the secondary optical axis; the exit pupil is connected with a laser transceiving rear end light path; the primary optical axis is parallel to the secondary optical axis. The precision and the imaging quality can be improved, and aberration can be reduced.
Owner:ABE TENDER (JIANGSU) TECHNOLOGY CO LTD

Parabolic reflector frame deployable antenna mechanism based on asymmetric four-pyramid units

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.
Owner:YANSHAN UNIV

A multi-reflection structure LED automobile low beam lamp

The present invention discloses a multi-reflection structure LED automobile low beam lamp, which includes a light source with the normal direction of the light-emitting surface facing the projection area, an ellipsoidal reflector located obliquely above the light source, a first parabolic reflector located below the light source, and a second parabolic reflector located below the first parabolic reflector; the ellipsoidal reflector includes an ellipsoidal first focus and an ellipsoidal second focus, the focus of the first parabolic reflector overlaps with the first focus of the ellipsoidal reflector, and the focus of the second parabolic reflector overlaps with the second focus of the ellipsoidal reflector; an cut-off structure for allowing the projected light to form a light spot with a clear cut-off line between light and darkness is formed at the bottom of the ellipsoidal reflector. Through the system composed of the ellipsoidal reflector, the first parabolic reflector and the second parabolic reflector, the projected light spot has a clear cut-off line between light and darkness. The ellipsoidal reflector acts as both a reflector and a baffle, greatly improving the light energy utilization rate.
Owner:陈少藩

A data communication signal receiving device and method

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.
Owner:BEIJING HUMRAIN TECH CO LTD