19 results about "Paraboloid" patented technology

Light-emitting unit, comprising: a light source (10); and a reflector (20; 20a) having a reflective surface of a first partial paraboloid (21) and a reflective surface of a second partial paraboloid (22), wherein the first partial paraboloid (21) and the second partial paraboloid (22) are spaced apart from each other in the direction of an optical axis of the light source (10), wherein the first partial paraboloid (21) and the second partial paraboloid (22) have a focal point (O) at the light source (10), where: the second partial paraboloid (22) between the light source (10) and the first partial paraboloid (21) in the direction of the optical axis; the second partial paraboloid (22) has a coefficient that is different from that of the first partial paraboloid (21); the second partial paraboloid (22) is positioned on a reflection direction side of a light from the light source (10) reflected by the first partial paraboloid (21), with respect to a plane obtained under the assumption that the first partial paraboloid (21) extends to the side of the light source (10), according to the coefficient of the first partial paraboloid (21); the first partial paraboloid (21) and the second partial paraboloid (22) by z + a = (x 2 + y 2 ) / 4a (a > 0) are expressed where the direction of the optical axis is a Y-axis, a reflection direction of the first partial paraboloid (21) and the second partial paraboloid (22) is a Z-axis, an axis perpendicular to the Y-axis and the Z-axis is an X-axis, and a coefficient “a” is; and the coefficient “a” of the second partial paraboloid (22) is smaller than the coefficient “a” of the first partial paraboloid (21).

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.

The application provides a symmetrical parabolic surface structure deployable antenna mechanism based on equilateral triangle surface division, which is formed by networking of shared flower discs among six identical basic folding and unfolding units, and the surface is formed by dividing a regular hexagon into six identical equilateral triangles. 2 The first flower disc, the second flower disc, the fourth flower disc and the seventh flower disc are respectively used as the shared flower discs of the first flower disc, the third flower disc, the sixth flower disc and the tenth flower disc of the adjacent basic folding and unfolding units, so that the parabolic surface deployable antenna mechanism is formed by networking of the shared flower discs among the six identical basic folding and unfolding units, the deployable antenna mechanism has high rotational symmetry and structural symmetry, the number of kinematic pairs is small and the arrangement is simple, only a single folding degree of freedom is contained, and the unfolding reliability is high.

The invention belongs to the technical field of education and teaching, and relates to a mathematical paraboloid structure display method comprising the following steps: receiving paraboloid parameters set by a user and coordinate system origin offset; according to the received parameters and based on the received parameters, horizontal section planes are generated in the z-axis direction through layer-by-layer sectioning according to the step length, and an implicit solution set of an algebraic equation on each section plane is solved to obtain a quadratic curve contour; after stacking processing is conducted along the z axis, a continuous smooth curved surface is generated, and a space grid model for generating a paraboloid is obtained; and rendering the space grid model of the paraboloid to obtain a space geometric model, and by constructing a complete technical system which takes algebraic parameters as drive, geometric generation as a core, multi-modal interaction as support and mathematical preciseness as guarantee, realizing normal form transformation from static result display to a dynamic construction process. The generation logic and geometric characteristics of the paraboloid can be visually, accurately and interactively revealed, and the teaching cognition effect is effectively improved.

The invention relates to an expandable rotating paraboloid double-reflector system SAR (Synthetic Aperture Radar) antenna, belongs to the technical field of spacecraft antennas, and solves the technical problems that the expandable rotating paraboloid double-reflector system SAR antenna is large in folding envelope and low in profile precision. The SAR antenna comprises a reflector and a phased array feed source device, the reflector comprises a main reflector body, an auxiliary reflector body and a conical force bearing barrel, the main reflector body is of a rotating paraboloid structure after being unfolded, the auxiliary reflector body is located on the inner side of the rotating paraboloid structure and connected with the main reflector body through the conical force bearing barrel, and the conical force bearing barrel is connected with the main reflector body. The phased array feed source device is arranged in the conical force bearing barrel, the phased array feed source device comprises a horn radiation unit, a T / R assembly and a heat conduction table, the cross section of the heat conduction table is of an axial symmetry structure shaped like a Chinese character'ji ', and the phased array feed source device is fixedly connected with an upper cabin plate of a load cabin of a satellite through the bottom face of a heat conduction table unit. The SAR antenna is high in precision, small in size, good in heat dissipation effect and high in stability.

The invention provides an installation method of a large-span hyperbolic paraboloid type cantilever grid, and relates to the field of building steel structures. According to the method, the middle arch and the side arch are temporarily supported and installed, the large-size cantilever beam is divided into three sections to be installed respectively, and the problem that after the large-size cantilever beam is installed, downwarping and deformation are large, and consequently the installation precision of the cantilever grid is low is solved. Meanwhile, the middle arches and the side arches are temporarily supported and installed, synchronous installation operation of multiple types of rod pieces such as the middle arches, the cantilever beams and the longitudinal tie rods can be achieved, the installation efficiency is greatly improved, and the problem that in an existing installation method, the side arches, the cantilever beams, the longitudinal tie rods and the middle arches need to be installed in sequence, and consequently the installation period is long is solved.

The application provides a collimating film, which comprises a reflecting layer and a plurality of optical lenses arranged in an array on the reflecting layer, the optical lenses comprising a cylindrical part and a paraboloid-like truncated cone part, the curved surface of the paraboloid-like truncated cone part having a parabolic curvature in the radial direction and a circular arc structure in the circumferential direction; one end of the paraboloid-like truncated cone part is inwardly recessed to form a cylindrical recess, and the bottom of the cylindrical recess is outwardly protruded to form a convex lens; the reflecting layer comprises a reflecting area and a plurality of circular light-transmitting areas arranged in an array, the circular light-transmitting areas and the optical lenses are arranged in the same way and one-to-one correspondence. The application also provides a display module containing the above-mentioned collimating film. According to the principle that the incident light on the focal point of the convex lens is emitted as parallel light, the collimating film of the application collimates the light rays in the central part of the optical lens, improves the collimating effect of the existing collimating film, and has a broad application prospect.

The embodiment of the invention discloses a portable large-area alpha and beta detection system. The system comprises a signal detection unit, wherein the signal detection unit comprises a large-area composite scintillator; the large-area composite scintillator is formed by compounding a plastic scintillator layer and a ZnS coating attached to the surface of the plastic scintillator layer, and the surface of the ZnS coating is covered with a light-proof film; a reflection cabin; the reflection bin is provided with an inner reflection wall in an elliptical paraboloid shape, the reflection bin is arranged above the large-area composite scintillator, and a closed light chamber is formed between the inner reflection wall of the reflection bin and a plastic scintillator layer of the large-area composite scintillator; a hemispherical lens; the hemispherical lens comprises a plane end and a spherical end; the hemispherical lens is arranged at the geometric center part of the reflection bin, and the spherical end extends into the reflection bin; and the photoelectric converter is arranged at the plane end of the hemispherical lens.

The invention relates to the technical field of solar heating, and discloses a composite reflector which comprises a reflector body, a first reflection paraboloid is arranged on the surface of the reflector body, the vertex of the first reflection paraboloid is O point, and the focus of the first reflection paraboloid is a1; a second reflection paraboloid is arranged on the first reflection paraboloid, the focus of the second reflection paraboloid is a2, a2 and a1 do not coincide, and a1, a2 and O point are collinear. According to the invention, the plurality of reflecting paraboloids are arranged on the surface of the composite reflecting mirror, and different focuses of the reflecting paraboloids are gathered to form the linear heating area for heating an object or a cavity with a larger axial size, so that the temperatures of different axial parts of the object or the cavity are more uniform, and the heating effect is better.

The present application relates to the technical field of concentrator, in particular to a kind of optimization method of asymmetric paraboloid and hyperboloid combined concentrator.The method includes the following steps: S1, the concentrator includes left CHC part and right CPC part, in the CHC part, asymmetric hyperboloid design is used, multiple equations are solved simultaneously to obtain the geometric parameters of CHC;S2, in the CPC part, asymmetric paraboloid design is used, according to the standard equation and asymmetric equation set of composite paraboloid, asymmetric concentrator parameters are obtained by solving;S3, according to the solving results of multiple equations, the standard equation and asymmetric equation set of composite paraboloid, the receiving half-angle of concentrator and the concentrator concentration efficiency of asymmetric concentrator and CPC concentrator are compared.The present application provides a kind of optimization method of asymmetric paraboloid and hyperboloid combined concentrator, by asymmetric paraboloid and hyperboloid combination, both increase the receiving half-angle of concentrator, and improve the concentrator concentration efficiency.

The application provides a double-sound-source wave front non-common-cavity horizontal coupling tweeter waveguide, which is Y-shaped and comprises two horizontally arranged waveguide channels; the first waveguide channel is used for connecting a spherical wave tweeter driver and is composed of a first channel, a first reflecting surface, a second channel, a second reflecting surface and a third channel connected in sequence; the first channel is a parabolic surface; the first reflecting surface is an elliptical surface; the second channel is a hyperboloid; the second reflecting surface is a rectangular surface; and the third channel is a rectangular surface; the second waveguide channel is used for connecting a plane wave sound source and is composed of a fourth channel, a third reflecting surface, a fifth channel, a fourth reflecting surface and a sixth channel connected in sequence; and each channel and reflecting surface is a rectangular surface. The waveguide of the application enables two or more sound sources to be coupled in a horizontal position without a common cavity and converts sound waves into a wave front in the shape of a plane wave without acoustic interference.

The invention discloses a reentry three-mirror improved Newton reflection astronomical telescope, and belongs to the technical field of optics. The three mirrors are respectively a primary mirror, a top reflecting mirror and a bottom reflecting mirror, wherein the primary mirror is a spherical toroidal mirror or a paraboloid toroidal mirror; the structure further comprises a diaphragm, an eyepiece group, a lens cone and a shell. According to the basic installation relation, the primary mirror is installed at the bottom of the lens barrel, the reflecting face faces the top of the lens barrel, the top mirror is installed at the top of the lens barrel, the reflecting face faces the primary mirror, and a light-passing aperture is formed between the top mirror and an opening in the top of the lens barrel; starlight firstly irradiates on the spherical toroidal mirror or the paraboloid toroidal mirror and is reflected to the area of the edge of the top reflecting mirror to form an annular light spot, and then the annular light spot is reflected to the edge of the bottom reflecting mirror to form an annular light spot; the purpose of the concentric ring projection is to change the reflection angle of the return light beam between the top reflector and the bottom reflector, and the small angle can increase the return times of the light beam, thereby facilitating the support of a higher telescopic multiple. The concentric ring bulges can also solve the problem of residual spherical aberration; the method is widely applied to astronomical observation.

The invention relates to a laser cleaning system and a working method and a design method thereof. The laser cleaning system comprises a point light source, an aspheric surface light source collimating lens, an off-axis paraboloid column reflector, a convex cylindrical lens, a concave cylindrical lens and a pyramid-cylindrical surface orthogonal composite lens which are sequentially arranged in the light path direction. The point light source forms a collimated light beam after passing through the aspheric surface light source collimating mirror, and the optical axis of the collimated light beam is a first optical axis and is parallel to the horizontal axis of the three-dimensional coordinate system; after the collimated light beam passes through the off-axis paraboloid column reflector, the first optical axis is turned by 90 degrees to form a second optical axis, and the second optical axis is parallel to the vertical axis of the three-dimensional coordinate system. According to the laser cleaning device, the laser action distance is kept within a long range through beam shaping, the same laser cleaning effect can be achieved within the range, and the problems that the focus position of a traditional laser cleaning light path is fixed, and the cleaning effect is not uniform due to defocusing in the working process are solved.

The invention discloses a paraboloid division method based on isosceles triangle and regular pentagon heterogeneous module networking and a deployable antenna mechanism formed by the paraboloid division method. The deployable antenna mechanism is formed by combining a plurality of pyramid combination units in a networking mode. Each pyramid combination unit comprises a basic pentagonal pyramid deployable unit and ten basic triangular pyramid deployable units which are arranged on the periphery of the basic pentagonal pyramid deployable unit in a surrounding mode and movably connected with the basic pentagonal pyramid deployable unit, and every two adjacent basic triangular pyramid deployable units are movably connected through foldable connecting rod pieces. According to the invention, the profile of the expandable parabolic reflector antenna is constructed through the combined pattern of the isosceles triangle and the regular pentagon, and the parabolic profile is high in precision; according to the method, conversion from two-dimensional plane division to three-dimensional profile division can be achieved, the bottom center node disc can be conveniently and rapidly determined, the complexity of the shape finding process is reduced, and the matching precision of the curvature and the focal length of the parabolic profile can be improved.

Computer assisted method for manufacturing a foldable paraboloid antenna, that comprises the following steps: - election of a two-dimensional radial Origami pattern with triangular cells and election of a paraboloid surface, - the two-dimensional radial Origami pattern with triangular cells is projected from the focus of the paraboloid surface on the paraboloid surface in order to print the Origami pattern on the paraboloid surface, obtaining triangles with curved sides, - obtention of a pattern with triangles with straight sides on the paraboloid surface by joining the vertices of the projected triangles with curved sides, - calculating the centroids of the triangles and scaling of the triangles with a homothetic operation from the focus, in order to reduce each triangle taking as a reference the corresponding centroid and to determine the spacing between triangles, obtaining a mesh with a plurality of segments and a plurality of triangular cells delimited by the segments of the mesh, - the triangular cells are filled with triangles of a reflective rigid material, - the mesh of the antenna is manufactured with a flexible material, such that the width of each segment is at least the sum of the thicknesses of the two adjacent rigid triangles, and - the cells on the periphery are manufactured with a rounded outer edge.

The invention discloses a low-power-consumption direct-injection type coaxial light source, and relates to the technical field of machine vision illumination. The light source mainly comprises a light source module, a reflecting cover and a light coordinate deviation correcting device. The reflecting cover is designed to be of a paraboloid structure, the focus of the reflecting cover coincides with the light source, light emitted by the LED can be efficiently reflected into collimated light, the light utilization rate and direction consistency are remarkably improved, and therefore power consumption and heating are reduced. The light coordinate offset correction device is composed of two prisms which are vertically arranged and have the same parameters, through accurate geometric layout, transverse offsets generated in two times of refraction of light are mutually offset, and a final emergent light path has no coordinate deviation. The technical problems that a traditional coaxial light source is low in lighting effect and serious in heating, and positioning is inaccurate due to light deviation are effectively solved, and the coaxial light source is particularly suitable for high-precision visual positioning and detection scenes.

The invention discloses a radial line power dividing feed system loaded with a shaped reflecting surface, and belongs to the technical field of high-power microwave antennas. The feed system has axial symmetry about a y axis, and comprises a coaxial injection waveguide, a first-layer radial line waveguide, a paraboloid upward transmission channel, a second-layer radial line waveguide and a phase matching structure which are connected in sequence, electromagnetic waves are fed into the first layer of radial line waveguide through the coaxial injection waveguide, spread outwards in the radial direction to a paraboloid of the paraboloid upward transmission channel and enter the second layer of radial line waveguide through reflection of the paraboloid, and an electric field is uniform. And after the electromagnetic wave reaches the second layer of radial line waveguide, the phase uniformity is realized through the phase matching structure. The antenna is simple in structure, easy to process, low in profile and high in power capacity, solves the problem that an existing feed system for outputting a quasi TEM mode is complex and huge, enables the structure of the whole antenna system to be more compact, and adapts to the development trend of compactness of a current high-power microwave system.

The application discloses a high-aperture utilization rate ultra-large quiet zone tight-field device, which comprises a tight-field reflecting surface, a feed source and a plane wave quiet zone; the feed source is an electromagnetic wave radiation source of the tight-field device; a diagonal feed layout is adopted, the vertex of the tight-field reflecting surface is arranged at a position close to the aperture diagonal line, the center of the feed source and the focal point of the reflecting surface are copointed on the virtual rotation symmetry axis of the reflecting surface; the tight-field reflecting surface is a quadric surface structure, the central entity is a rotation parabolic surface part, and is used for correcting the spherical wave radiated by the feed source into a plane wave in the quiet zone; and the plane wave quiet zone is a limited three-dimensional space region which meets the requirement of far-field test after the electromagnetic wave radiated by the feed source is corrected by the reflecting surface.