35results about How to "Optimize form factor" patented technology

The present invention relates to a display element for a personal display system, a personal display, and methods and uses. The display element comprises a light guide (21) capable of guiding light by total internal reflection, a diffractive in-coupling grating (22) and a diffractive out-coupling grating (25). The in-coupling grating is adapted to couple light directed thereto to the light guide to allow the light to propagate to the out-coupling grating. According to the invention, the incoupling grating is adapted to couple light into at least the light guide as at least two diffracted wavefronts, and the display element further comprises at least two different exit pupil expansion gratings (23, 24) adapted along the Different paths direct the wavefronts to the outcoupling gratings respectively. The invention allows reducing the size of diffractive display elements.

A headphone device includes a first audio output module, a second audio output module, and a head module connected between the first and second audio output modules that are located at both ends of the head module respectively. The head module stays bent when in use and stays straight when in compact storage. Thus the form factor of the headphone device in compact storage is relatively smaller.

The invention discloses a telephoto lens, comprising a lens frame and an end cover; the lens frame is internally provided with a meniscus convex lens, a double concave lens, a first meniscus concave lens, a double convex lens and a second meniscus concave lens in sequence from an object-near side to an object-far side; the contact surfaces of the first meniscus concave lens and the double convex lens are glued; a spacer is arranged between the double concave lens and the first meniscus concave lens; and a spacer is arranged between the double convex lens and the second meniscus concave lens. As the telephoto lens adopts the structure, the ray longitude has the characteristics of small viewing holes, no vignetting in the viewing field, large collecting amount of daylight, no defocusing andgood night viewing effect; and the focus reaches 12 mm, and the resolution is more than million pixels. The lens designed according to the proposal adopts an optical path with an included angle of zero degree between the principal ray and the optical axis, therefore, the optical distortion is small and the utilization rate of energy is high; and the lens is designed to be one third circle, has high resolution and excellent night viewing effect.

An embodiment of the present invention provides a method for manufacturing a fairing. The method includes: using a first composite material to form a fairing body; using a second composite material to form a cowl; combining the second composite material with the first The materials are different; the fairing body and the cowl are assembled together to form a fairing. In the solution of the present invention, the fairing adopts the separate molding of the fairing body and the hood, which effectively releases the internal stress of the molding, optimizes the outer dimensions of the fairing, and improves its overall assembly accuracy.

The invention belongs to the technical field of radar communication, and more specifically relates to a carbon-fibre composite as well as a preparation method thereof and a radar antenna using the carbon-fibre composite. The carbon-fibre composite comprises epoxy resin and high strength carbon fiber; the total weight of all components is 100%, the weight percentage of the high strength carbon fiber is 60-70%, and the weight percentage of epoxy resin is 30-40%; the high strength carbon fiber is continuous filament type carbon fiber treated by polyacrylonitrile; the fiber has low density, high tensile strength and yield strength. The preparation method comprises the following steps: obtaining of prepreg, layered paving as well as insulation and pressure maintaining. The radar antenna comprises a casing, a feed network, an upper frame and a lower frame, the cross sections of the upper frame and the lower frame are trapezoids with narrow top and wide bottom, and a gap between the upper frame and the top of the lower frame forms an arrangement area for clamping and fixing the feed network. The radar antenna has the advantages of light quality, maintenance convenience, short manufacture period, and low manufacture cost.

The invention discloses an insulated winding or electromagnetic coil for electrical equipment and a sintering and forming process of the insulated winding or electromagnetic coil. The insulated winding or electromagnetic coil for the electrical equipment is a metal conductor for winding and welding a lead outside an inner main insulating layer; an interlayer insulating film is wound among various layers of the metal conductor; end-sealed insulating layers are wound at two ends of each layer of coil while the winding of the metal conductor and the interlayer insulation are realized simultaneously and sequentially realized; and an outer main insulating layer is wound outside the metal conductor of the winding or coil wound according to the specified turn numbers and layer numbers. The sintering and forming process of the insulated winding or electromagnetic coil is mainly characterized in that the winding or coil is wound by an inner main insulating layer, an external winding welding lead metal conductor, an interlayer insulating film, the end-sealed insulating layers and the outer main insulating layer on a die core of a metal die; a reinforced insulating layer is packed at the welded part of a lead or joint and a tap; the metal die in which the winding or coil is arranged is filled into a vacuum pressure sintering furnace, so that the insulating material and the metal conductor are bonded and integrally formed; and the electrical strength and the heat radiating effect of the insulating material are improved, so that the size is reduced, the process flow is simplified and the cost is reduced.

A radial-flow turbine containing cylinder, stator and rotor installed in cylinder, featuring a complete steam flow path, steam admission pipe, steam admission chamber, at least two or plurality of endiocentric energy converting flow path groups, at least one steam flow reversible flow path group and exhausting chamber, wherein the number of steam flow reversible flow path group is one less then that of endiocentric energy converting flow path groups, all endiocentric energy converting flow path groups and steam flow reversible flow path group are alternately arranged along axial direction of rotor, plurality of convergent nozzles are set at the outlet of steam admission chamber and end of flow reversible flow path groups, comparing with current technology. Said invention has advantages of high energy conversion efficiency and fine anti overspeed, anti vibration and shock resistance performance.

The invention discloses an instantly soluble hard alloy block and a preparation method and application thereof. The instantly soluble hard alloy block is made from materials in following percent by weight by binding with an adhesive: 25-35% of high carbon ferro-chrome, 0.5-1%. of rare earth, 15-40% of ferro-boron, 25-55% of ferro-vanadium, 2-6% of ferrosilicon, and 2-3% of ferronickel, wherein the adhesive is a resin adhesive. The instantly soluble hard alloy block has high hardness (Rockwell hardness HRC > / =73), good wear resistance, manufacture process simplicity, low cost, low surfacing current, convenience of selecting dimensions and shape, low time and labor consumption for a welder, etc., the problem that a quick-wear apparatus is short in life is solved, and the life of an original member is prolonged by 3-10 times.