99 results about "Symmetric design" patented technology

A planar optical device, comprised of sets of nanometer-scale holes milled into a thin metal or ceramic film of subwavelength thickness serves to form arbitrary waveform of light. The holes form a pattern, preferrably rings, of various sizes in order to achieve a given phase front of light due to photonic effect. When designed as a lens, the device focuses incident light into a tight focal spot. In symmetric design, the focusing property of the device does not depend on the incident polarization angle. The lens can be manufactured based on high-throughput fabrication methods and easily integrated with a chip or placed at the end of an optical fiber.

A planar optical device, comprised of sets of nanometer-scale holes milled into a thin metal or ceramic film of subwavelength thickness serves to form arbitrary waveform of light. The holes form a pattern, preferrably rings, of various sizes in order to achieve a given phase front of light due to photonic effect. When designed as a lens, the device focuses incident light into a tight focal spot. In symmetric design, the focusing property of the device does not depend on the incident polarization angle. The lens can be manufactured based on high-throughput fabrication methods and easily integrated with a chip or placed at the end of an optical fiber.

A Scotch yoke actuator is disclosed with a dual yoke and a diagonally symmetric design. A pair of shafts and pushing devices apply equal, opposing forces to the yoke, causing end loading forces applied to a rotatable shaft attached to the center of the yoke to be cancelled. In embodiments, the weight of the pushing devices is balanced about the yoke, each shaft extends in only one direction from the yoke, and / or the shafts are supported only by the yoke and the pushing devices. In embodiments that use yoke pins, the yoke pins include rollers or bearings to reduce friction, and / or two pair of yoke pin slots support protruding ends of the yoke pins. The yoke pin slots can extend to edges of a yoke housing face, allowing easy shaft removal and reinstallation, and each shaft can include a split end with extensions on opposing sides of the yoke.

The invention relates to a flower transplanting paw with a function of gathering leaves, and belongs to the field of agricultural automatic offspring seed transplanting equipment. The structure has a symmetric design and is eudipleurally arranged on two sides of a transverse sliding device; an arm, a longitudinal sliding rail group, a longitudinal sliding block group, a sliding block linkage rod, a gathering plate, a synchronous gathering plate linkage rod, a catch fixing device and a paw are arranged on each side; the paw is fixedly connected with the tail end of the arm; the catch fixing device is fixedly connected with the lower part of the arm; the gathering plate is hinged with the middle of the arm; the longitudinal sliding rail group is fixedly connected with the upper part of the arm; the longitudinal sliding block group is arranged on the longitudinal sliding rail group; the arm is fixedly connected with the lower part of a paw fixing frame on one side of the transverse sliding device; the sliding block linkage rod is connected between a transverse moving device and the longitudinal sliding block group; and the synchronous gathering plate linkage rod is connected between the gathering plate and the longitudinal sliding block group. The flower transplanting paw can automatically gather the leaves during catching, so that the phenomenon of damage to seedlings is avoided; the automation degree is high; and the practicability and the applicability are high.

A latch that can be used as a mechanical aid for insertion / extraction of a circuit pack into / from a slot in an equipment cabinet. In an example embodiment, a handle of the latch contains a spring-biased locking lever that automatically locks the latch in the closed position when the pawl of the latch engages the keeper. Some embodiments may include an integrated micro-switch that enables a graceful shutdown of the circuit pack, e.g., to avoid an extraction without a proper power-down. At least some embodiments of the latch may also have one or more of the following beneficial characteristics: (i) a relatively large and / or variable leverage ratio; (ii) a relatively small footprint on the faceplate of the circuit pack; (iii) a fully symmetric design with or without the integrated micro-switch; and (iv) enhanced electromagnetic compatibility with the use of an electrically conducting latch base and / or gasket.

A vehicle headlight, having multiple LEDs provided on a carrier and organized into a group arrangement having an asymmetric design arrived at by starting with an overall symmetric design and providing therein at least one area with non-functional or missing LEDs; and at least one optical element functioning as a common collection lens, wherein the vertical angle of beam spread φ is less than 5° and the horizontal angle of beam spread φ is in the range of less than 20° relative to the central optical axis of the optical element.

The invention discloses a five-stage coupling bridge, and relates to the technical field of bridges. The five-stage coupling bridge is composed of a cavity, a cover plate, dielectric plates and additional dielectric plates, wherein the cover plate is installed above the cavity, the cavity is internally provided with the circuit board, the upper surface and the lower surface of the circuit board are provided with a microstrip line respectively, four ends of the microstrip lines are connected with the external part through the cavity, the dielectric plates are arranged above and below the circuit board respectively, and the dielectric plates are externally provided with the additional dielectric plates respectively. The five-stage coupling plate adopts a coupling strip line five-stage microstrip line symmetric design, not only can meet requirements of general columnar coupling rod bridges for the bandwidth and change a circumstance that the strip lines cannot be guaranteed in rigidity and easy to deform because the strip lines are too long at the same time, but also reduces the required processing accuracy, assembling requirements and the production cost in the production process.