38results about How to "Has rotational symmetry" patented technology

The invention discloses an unshielded three-reflector optical system, which can be used in a wide spectral imaging system with wave band from ultraviolet to infrared, and is particularly applicable to a preposed object lens of a spectrum imager. The system consists of a main reflector, a secondary reflector and a third reflector with aperture ratio of 1 / 0.5-1 / 3; the system avoids shielding through inclining elements; a beam path of the system is telecentric beam path in the image side; a principle ray of zero field coverage is spread along links of the vertex of each element; a diaphragm is arranged on the secondary reflector; the secondary reflector is arranged on a focal plane of the third reflector; focal power of the main reflector, the secondary reflector and the third reflector is positive, negative and positive respectively; curvature radiuses of the vertexes of the three reflectors approximately meet the condition of Petzval; and types of the three reflectors are Zernike free surfaces. The system has reasonable residual aberration distribution to greatly improve image quality, and can easily avoid shielding, so that the effective use area of each mirror face is equivalent to an original mirror; and the primary ray of the zero field coverage of the system moves along the links of the vertex of each surface, thereby facilitating the processing, assembly and regulation ofthe system.

The invention relates to a solenoid valve, in particular for controlling a brake pressure of a wheel brake of a motor vehicle, comprising an axially moveably mounted armature, wherein one end of the armature is associated with a pole core and a valve sealing element is arranged at another end of the armature, wherein the armature has an axial through-opening, wherein a closure element is force-lockingly and / or interlockingly retained in the axial through-opening in a selectable position, and a plunger is axially moveably mounted in the axial through-opening, which provides a connection to thepole core in an installation position, wherein a pressure spring is positioned in the axial through-opening, wherein the pressure spring is retained in a pretensioned manner between the plunger and the closure element, characterised in that the closure element is designed as a three-dimensionally convex element.

A device for recovering drinking water from condensate includes a self-supporting moulded part 11 formed of a transparent synthetic resin such as PET or PC, which is resistant to UV radiation. The moulded part 11 presents an open bottom area 16 with a collecting channel 15 on the edge side, with the collecting channel 15 presenting an inner wall 18 oriented towards the circumferential surface 12 and serving, at the same time, as floating aid, and with the moulded part 11 being provided with a pouring opening in its upper section 13 . For the manufacture of this device, a vacuum is created in a special deep-drawing tool not only in the region of the circumferential surface to be produced but also in the region of the collecting channel to be formed, and the moulded part is separated from a separated deep-drawing tool element outside the zone of the collecting channel.

A first substrate includes, on one side thereof that is closer to a liquid crystal layer, a picture element electrode provided for each picture element region, a switching element, and a bus line. A second substrate includes a counter electrode opposing the picture element electrode. The picture element electrode includes a plurality of openings and a solid portion that includes a plurality of unit solid portions. In each picture element region, the liquid crystal layer takes a vertical alignment in the absence of an applied voltage, and forms a plurality of liquid crystal domains, each of which takes a radially-inclined orientation, in the plurality of openings and the solid portion by inclined electric fields produced at respective edge portions of the plurality of openings of the picture element electrode in response to an applied voltage. In each picture element region, at least one of the plurality of openings of the picture element electrode that is located along the bus line and located between two adjacent ones of the plurality of unit solid portions is superposed on the bus line.

The invention discloses a small-size high-isolation three-unit MIMO antenna based on a printed circuit board. The antenna comprises a substrate, slot antenna bodies with an open-loop terminal and a micro-strip feed circuit with a micro-strip decoupling structure. The substrate is a double-face printed circuit board with a rotational symmetry structure, the micro-strip feed circuit is etched on the front face of metal of the substrate, the slot antenna bodies are etched on the reverse side of the substrate, the substrate is provided with feed through holes used for feed and short-circuit through holes used for matching, the micro-strip feed circuit is composed of standard micro-strip feeder lines and the corresponding micro-strip decoupling structure, and the micro-strip feeder lines pass through the slot antenna bodies, carry out feed on the slot antenna bodies through coupling and are matched with the short-circuit through holes; the micro-strip decoupling structure is connected with the micro-strip feeder lines to provide a new coupling component for offsetting an original coupling component of the connecting position so as to achieve decoupling. The size of the antenna is reduced, high isolation and directional radiation characteristics are achieved, and the antenna can be applied to small-sized wireless communication equipment with the MIMO technology adopted.

The application relates to an interface and an electronic device using the same. The interface comprises a plurality of conductor rings of different sizes, wherein each of the conductor rings is rotationally symmetric; each of the conductor rings is geometrically similar and nested in a concentric ring structure according to size; and an insulating material is filled between the conductor rings toform an insulating layer. Based on the rotational symmetry characteristic of the aforementioned interface, any one of the two interfaces that need to be connected to each other can be adaptively rotated to a certain angle and plugged according to the environmental factors of the interface, such as the factor whether there is an obstacle and the angle of the obstacle, so as to bypass the obstacle;at the same time, direct plugging of two electronic devices can be realized, no need to configure connecting lines, and no consideration of the influence of the obstacle.

A first substrate includes, on one side thereof that is closer to a liquid crystal layer, a picture element electrode provided for each picture element region, a switching element, and a bus line. A second substrate includes a counter electrode opposing the picture element electrode. The picture element electrode includes a plurality of openings and a solid portion that includes a plurality of unit solid portions. In each picture element region, the liquid crystal layer takes a vertical alignment in the absence of an applied voltage, and forms a plurality of liquid crystal domains, each of which takes a radially-inclined orientation, in the plurality of openings and the solid portion by inclined electric fields produced at respective edge portions of the plurality of openings of the picture element electrode in response to an applied voltage. In each picture element region, at least one of the plurality of openings of the picture element electrode that is located along the bus line and located between two adjacent ones of the plurality of unit solid portions is superposed on the bus line.

The invention provides a liquid crystal lens array and a stereoscopic display apparatus, and relates to the technical field of stereoscopic display. The liquid crystal lens array includes a plurality of liquid crystal microlens units, wherein each liquid crystal microlens unit includes a first glass substrate and a second glass substrate; the first glass substrate is plated with a first electrode; the second glass substrate is plated with a second electrode; liquid crystal is filled between the first glass substrate and the second glass substrate; and the first electrode includes a circular electrode at the center position, and at least two annular electrodes which are arranged in the shape of a concentric ring and take the circular electrode as the center. As the 3D display effect formed by the liquid crystal lens array has no directionality, a user can watch the required 3D effect from a wider angle, and the watching angle is more continuous, so that the 3D display effect of a stereoscopic display apparatus using the liquid crystal lens array becomes better and has no shear zones and the problem that the watcher becomes giddy because of being in the shear zone is effectively avoided.

The invention discloses a three-section surface plasmon polariton lens, and relates to a surface plasmon polariton. The lens is formed by three layers of rectangular grooves etched on the surface of a metal, a small-size surface plasmon polariton focus breaking through the diffraction limit is formed under the illumination of linearly polarized light, the width of the grooves is lambda / 2, the center positions of each layer of grooves are distributed on three line segments, and for the i layer (i=1, 2, 3), the length and the center position of each layer of grooves are designed as follows: the distances from the midpoints of the left and right sides of the i layer of grooves to the focus separately satisfy f+(i-1)d+k lambda / 3 and f+(i-1)d+(k+1) lambda / 3, wherein k is the level of a groove, namely the k difference of two adjacent grooves on the same layer is 3, and each groove corresponds to a Fresnel zone in the traditional zone plate; and when the plane wave polarizing in the y direction is perpendicular to the illumination structure on the surface of the metal, the surface plasmon polaritons are excited by the same phase on each grove, and constructively interfere with one another when being propagated to a focus to form the focus.

The invention relates to a source arrangement of a VPE deposition device, comprising a container (2) containing a liquid or solid starting material (1) and having a top opening, a feed line (3) for a reactive gas (4) which reacts with the starting material (1) in order to produce a process gas (5) that contains the starting material. The aim of the invention is to temporally stabilize the source reaction. For this purpose, a cover (6) rests directly on the starting material (1) and defines a volume (8) between the cover and the surface (7) of the starting material (1), the reactive gas (4) flowing through said volume and the feed line (3) running into it.

Disclosed is a small-sized transceiving shared broad-wave-beam coverage antenna. The coverage antenna comprises an antenna radiator, an octagonal-prism table and octagonal-prism column structure, a built-in transceiving assembly, a bottom plate, radio-frequency connectors, a low-frequency connector and an octagonal-prism table upper cover plate, wherein the antenna radiation body comprises eight receiving antenna units and eight transmitting antenna units, and a group of receiving and transmitting units are arranged on the side surface of each prism table; the octagonal-prism table and octagonal-prism column structure adopts an integrated structure with the octagonal-prism table on the upper part and the octagonal-prism column on the lower part; the built-in transceiving assembly comprises a receiving assembly and a transmitting assembly; the bottom plate is used for fixing the built-in transceiving assembly; and the radio-frequency connectors comprise a transmitting radio-frequency connector and a receiving radio-frequency connector. The characteristics of small size, transceiving sharing, and high-gain coverage performance of 5dBi in a broad-wave-beam coverage region at a pitching angle of minus or plus 70 degrees is realized by virtue of the crossed array design of the receiving and transmitting antenna units on the adjacent side surfaces of the octagonal-prism table, 16 oval-like wave beam wide coverage wave beam design and small-sized comprehensive design.