69results about How to "Reduce deflection angle" patented technology

The invention discloses a wavelength selective switch. The wavelength selective switch comprises an input fiber port, an output fiber port, a fiber collimator array, a polarization control unit, a beam shaping system, a chromatic dispersion unit, an achromatism processing unit and a miniature reflection switch engine, wherein the polarization control unit decomposes incident light signals into two parallel beams which are transmitted in the same direction and are identical in polarization direction, so that polarization dependent loss of an optical system is reduced; a miniature reflection unit of the miniature reflection switch engine has the characteristics of a high fill factor, high mirror surface flatness and the like, so that the characteristic of a superflat transmission band of the wavelength selective switch is achieved.

A method for machining a helical bore of a stator comprises providing a stator body with a bore. In addition, the method comprises providing a first and a second machining device. The first machining device comprises a milling head coupled to the end of a shaft and a rotary cutter mounted to the milling head for rotation about an axis transverse to the longitudinal axis. The second machining device comprises a whirling head on the end of a shaft and a whirling cutter mounted to the whirling head for rotation about an axis parallel to the longitudinal axis but offset therefrom by a selectively variable degree. Further, the method comprises driving the first machining device through the bore multiple times with the rotary cutter following a helical path. Still further, the method comprises driving the second machining device through the bore with the whirling cutter following the same helical path.

The invention discloses a transverse and lateral control method and system for a plane-symmetry hypersonic flight vehicle by using coupling. The method comprises the following steps: (1) obtaining measurement information of an airborne sensor of the plane-symmetry hypersonic flight vehicle; (2) analyzing the roll-to-swing ratio characteristic of the hypersonic flight vehicle in the transverse direction and the stability characteristic of the Dutch roll coupling mode; (3) analyzing control coupling modal characteristics of the hypersonic flight vehicle aileron during operation; (4) feeding backthe roll angle rate to the aileron to improve the damping characteristic of the Dutch roll; (5) feeding back the sideslip angular rate to a rudder to improve the damping characteristic of the Dutch roll coupling mode, and restraining the motion coupling influence; (6) feeding back the sideslip angle deviation to the rudder to improve the stability characteristic of the Dutch roll coupling mode; and (7) feeding back a roll angle deviation to a sideslip angle instruction, and realizing roll control by using Dutch roll coupling. The requirement of coupling control on the pneumatic control surface control capacity is lowered, and the overall design pressure of the aircraft is reduced.

A beam deflector for deflecting an incident beam (9) of light for a preset wavelength has a plate (3) of electrooptical material between two electrode structures (19,23) and first (5) and second (7) mirrors (5,7) plane-parallel to each other. The first mirror turned towards the incident beam of light has lower reflectivity than the second mirror. The first or second mirror can have multiple layers (11,13) of dielectric material each with a different refraction index. A Independent claim is also included for a connection method for use with multiple beam deflectors that has multiple connections for optical signals and connector ends for the entry/exit of optical signals as beams of light.

The invention discloses a low cross-axis sensitivity piezoresistive accelerometer structure and a manufacturing method thereof and belongs to the field of micro-electro-mechanical systems. A low cross-axis sensitivity piezoresistive accelerometer is formed by a mass block (1), eight support beams (2), four sensing beams (3) and a frame (4). The center of gravity of the mass block (1) is located ina neutral plane of the support beams (2). The upper surfaces of the sensing beams (3) are located on the surface of a chip such that piezoresistors (5) are made on the surfaces of the sensing beams.The thickness of the sensing beams is far smaller than that of the support beams. Under the action of Z-axis acceleration on the surface of a vertical chip, the mass block (1) moves in a Z-axis direction and drives the sensing beams (3) to move together, the strain of the sensing beams (3) is detected by the piezoresistors (5), thus Z-axis acceleration is obtained. Since the center of gravity of the mass block (1) is located in the neutral plane of the support beams (2), the deflection angle of the mass block (1) under X-axis or Y-axis acceleration within the chip surface is small, and so thestructure has small cross-axis sensitivity.

A charged particle beam system has a charged particle beam source (110) for producing a charged particle beam (EB), a beam blanker (1) and a sample stage (130) on which a sample (S) is held. The sample (S) is irradiated with the beam (EB) passed through the beam blanker (1). The beam blanker (1) has a multistage deflector assembly (20) and a first apertured portion (30). Multiple stages of deflectors (20a, 20b, 20c) for deflecting the beam (EB) are arranged in the multistage deflector assembly (20). The first apertured portion (30) is disposed between the first stage of deflector (20a) and the second stage of deflector (20b) of the deflector assembly (20). The beam (EB) which has passed through the first aperture portion (30) after being deflected by the first stage of deflector (20a) is deflected back to an optical axis (OA) by the second and subsequent stages of deflectors (20a, 20b).

The invention discloses a liquid crystal display panel. The liquid crystal display panel comprises a first substrate, a second substrate, negative liquid crystal and a color filter layer, wherein the first substrate and the second substrate are arranged oppositely, the space between the first substrate and the second substrate is filled with the negative liquid crystal, the color filter layer comprises at least two color resistors in different colors, the second substrate comprises at least two pixels corresponding to at least two color resistors respectively, each pixel comprises at least one sub-electrode, the sub-electrode on the pixel corresponding to the color resistor with the largest penetration rate has the maximum width, and the widths of the sub-electrodes on the pixels corresponding to the other resistors are smaller. By means of the liquid crystal display panel, the color cast phenomenon can be eliminated while the penetration rate of the liquid crystal display panel is effectively ensured.

A self-tapping insert is installed in a pre-existing bore hole in a workpiece by rotating the insert, causing cutting threads on the exterior of the self-tapping insert to cut new threads. Engagement threads on the exterior of the self-tapping insert engage the new threads to retain the self-tapping insert within the workpiece. The self-tapping insert may comprise internal threads which are used to replaced damaged threads in the workpiece. The exterior threads of the self-tapping insert may be configured as left-handed threads, while the internal threads are right-handed threads. The top of the self-tapping insert may comprise a plurality of castellations, and a drive head having matching castellations may be employed to install the self-tapping insert, eliminating the need for installing the insert with a drive bolt. The exterior of the self-tapping insert may further comprise a leading edge for cutting the new threads, where the leading edge has greater radial extension than the trailing edge. This feature provides greater chip relief, thereby reducing the torque required to install the self-tapping insert.

The invention discloses a single-curved strip-shaped power ultrasonic device with a linearly moving imaging probe, which includes an ultrasonic focusing transducer, a supporting structure, a water bladder and an ultrasonic imaging probe, and the ultrasonic focusing transducer is symmetrical through silicon rubber. Sealed on the left and right sides of the supporting structure, the surrounding of the supporting structure is provided with a water bag as a waterproof all-inclusive structure, the gap between the water bag and the supporting structure is filled with coupling agent, the upper part of the supporting structure The surface is an arc-shaped single curved surface, and a square through hole is arranged at the center of the support structure, and the ultrasonic imaging probe is placed in the through hole. The transducer of the present invention scans into a plane, the focus area is concentrated, and the treatment plane and the imaging plane of the imaging probe are just on the same plane; at the same time, the distance between the imaging probe and the patient's body is relatively close in the present invention, which is conducive to ultrasonic imaging and can improve the treatment process. image clarity.

The invention discloses a magnet forming die which comprises a female die, an upper punch and a lower punch. The female die comprises a die sleeve and a hard alloy sleeve, the die sleeve is made of non-magnetic-permeability materials, the hard alloy sleeve is positioned on the inner side of the die sleeve and is fixedly connected with the die sleeve, a die cavity is formed in the hard alloy sleeve, two symmetrical through holes are formed in side walls of the die sleeve, two soft magnetic material blocks are respectively inlaid in the two through holes, the inner end surfaces of the soft magnetic material blocks are in contact with the hard alloy sleeve, and the shape of the inner end surface of each soft magnetic material block is identical to that of the cross section of loosely filled magnetic powder in the die cavity along the direction of a corresponding magnetic field. The magnet forming die has the advantages that magnetic lines of force of the magnetic fields access the magnetic powder via the two soft magnetic material blocks, and magnetic powder access paths of the magnetic lines of force are guided by the two soft magnetic material blocks, so that magnetic powder entrance deflection angles of the magnetic lines of force are reduced, magnetic declination of a magnet is reduced, and an orientation degree of the magnet is increased.

The invention discloses a hyperboloid strip-shaped power ultrasonic device with a linearly moving imaging probe, which includes an ultrasonic focusing transducer, a supporting structure, a water bladder and an ultrasonic imaging probe, and the ultrasonic focusing transducer is symmetrical through silicon rubber. Sealed on the left and right sides of the supporting structure, the surrounding of the supporting structure is provided with a water bag as a waterproof all-inclusive structure, the gap between the water bag and the supporting structure is filled with coupling agent, the upper part of the supporting structure The surface is an arc-shaped hyperboloid, and a square through hole is arranged at the center of the supporting structure, and the ultrasonic imaging probe is placed in the through hole. The transducer of the present invention scans into a plane, the focus area is concentrated, and the treatment plane and the imaging plane of the imaging probe are just on the same plane; at the same time, the distance between the imaging probe and the patient's body is relatively close in the present invention, which is conducive to ultrasonic imaging and can improve the treatment process. image clarity.

The invention discloses a nozzle structure with an azimuth angle for a radial direction pre-swirling system. The nozzle structure with an azimuth angle is used in an aircraft engine and a ground combustion gas turbine radial direction pre-swirling system. The azimuth angle of the nozzle is controlled by two angles of [theta] and [alpha], wherein, the [theta] is a pre-swirling angle of the nozzle,and the [alpha] is a deflection angle of a nozzle axis in the axial direction. The nozzle structure with the azimuth angle for the radial direction pre-swirling system is widely used in the cooling system of high temperature components of a gas turbine, the nozzle structure with the azimuth angle for the radial direction pre-swirling system has the beneficial effects that the deflection angle of airflow in a disk cavity is reduced, the circulation effect of the airflow is improved, greater cooling flow can be obtained under the same inlet and outlet pressure, the cooling air quality at an inlet of a turbine blade is improved, and the temperature level of hot end parts such as a turbine disc and the turbine blade is effectively alleviated.

The invention discloses a disc rotary type multi-channel electron beam rapid forming method. The method comprises the steps that firstly, three-dimensional part models are placed on a forming zone forslicing; secondly, a polar coordinate system is established, and position information of the three-dimensional part models is determined; thirdly, scanning track points of the three-dimensional partmodels are obtained through calculation; fourthly, powder paving and forming zone positioning are carried out; fifthly, single-layer solid sheet layers are obtained through powder scanning melting; sixthly, the forming zone is reset; and seventhly, a forming base plate is lowered, the processes in the step four to the step sixth are repeatedly executed, and the single-layer solid sheet layers on the forming base plate are stacked layer by layer to obtain a three-dimensional part. By means of the disc rotary type multi-channel electron beam rapid forming method, the polar coordinate system is established on a disc working table of disc rotary type multi-channel electron beam rapid forming equipment to accurately determine the position information of the two or more three-dimensional part models on the disc working table, then scanning melting is carried out, rapid forming of the three-dimensional parts in different materials is realized, and the part forming precision is improved.

A self-tapping insert is installed in a pre-existing bore hole in a workpiece by rotating the insert, causing cutting threads on the exterior of the self-tapping insert to cut new threads. Engagement threads on the exterior of the self-tapping insert engage the new threads to retain the self-tapping insert within the workpiece. The self-tapping insert may comprise internal threads which are used to replace damaged threads in the workpiece. The means of installing the self-tapping insert may include a drive bolt having threads which make up into those of the self-tapping insert's internal threads. The self-tapping insert is aligned within the bore hole by means of a detachable pilot, which is connected to the insert with attachment means. The attachment means include the pilot being attached to the drive bolt. The pilot may be attached to the drive bolt means of left-handed threads in an axially-centered aperture of the pilot and matching left-handed threads on the end of the drive bolt.

The invention discloses a pantograph bow balancing mechanism for a small-deflection-angle pantograph. The pantograph bow balancing mechanism comprise a balancing rod system which comprises a first rodhinged to the upper end of a lower arm rod, a second rod hinged to the upper end of an upper arm rod, a fourth rod fixedly connected with the middle of a pantograph bow rotary shaft, and a third rodwith one end being hinged to the free end of the second rod and the other end being hinged to the free end of the fourth rod. The other end of the first rod is hinged to the middle of the second rod,and the upper end of the upper arm rod is provided with a connecting part in an extending mode. The connecting part is hinged to the pantograph bow rotary shaft, and the second rod is in an arc shapeand bends towards the first rod. According to the pantograph bow balancing mechanism, through changing of the relative positions of rotating hinges of all rod pieces of a pantograph balancing system,the deflection angle of a pantograph bow is remarkably decreased, thus the contact area of the pantograph and a rigid catenary is increased, the current collecting quality of the pantograph is effectively improved, and pantograph-catenary damage is reduced.

The invention discloses an optical lens, a camera module and electronic equipment. The optical lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged along an optical axis from an object side to an image side, the first lens has positive focal power, and the object side surface and the image side surface of the first lens are a convex surface and a concave surface near the optical axis respectively; the second lens has positive focal power, the image side surface of the second lens is a convex surface at the light inlet axis, and the third lens has focal power; the fourth lens has focal power, and the object side surface of the fourth lens is a convex surface near the optical axis; and the fifth lens has focal power, the object side surface and the image side surface of the fifth lens are respectively a convex surface and a concave surface near the optical axis, and the optical lens meets the relational expression: 1.2 < SD11/SD21 < 1.6. According to the optical lens, the camera module and the electronic equipment, the ultra-wide-angle imaging effect can be realized on the basis of considering the miniaturization and light and thin design of the optical lens.

The invention discloses a single-curved strip-shaped power ultrasonic device with a stereoscopic imaging probe, which includes an ultrasonic focusing transducer, a supporting structure, a water bladder and an ultrasonic imaging probe, and the ultrasonic focusing transducer is symmetrically sealed by silicon rubber On the left and right sides inside the support structure, water bladders are provided around the support structure as a waterproof all-encompassing structure, and the gap between the water bladder and the support structure is filled with coupling agent. The upper surface of the support structure It is an arc-shaped single curved surface, and a square through hole is arranged at the center of the supporting structure, and the ultrasonic imaging probe is placed in the through hole. The focus transducer of the present invention has a small element space size, which makes it easier to control the large-angle deflection of the sound beam; at the same time, the distance between the imaging probe and the patient's body is relatively short, which is conducive to ultrasonic imaging and can improve image clarity during treatment.