121results about How to "Eliminate dispersion" patented technology

The speaker has a diaphragm main body 30 supported resiliently on a frame 23 via an edge portion 31 around its outer circumference, and the groove ribs 35 integrally formed in the edge portion 31, wherein a regulation member 37 for partially improving a flexural strength of the edge portion 31 is provided on a part of the front or back face of the edge portion 31.

The present invention is directed towards a golf club head having integrally incorporated twisted face angles which are selected to match a particular golfer's swing speed. The twisted profile front face is defined by a first horizontal plane through the center of the face and having a first tangent at an intersection between the first horizontal plane and a center vertical plane and a second horizontal plane located between the first horizontal plane and a top line, wherein the second horizontal plane has a second tangent at an intersection between the second horizontal plane and the center vertical plane that is an angle to the first tangent. The invention further includes a third horizontal plane located between the first horizontal plane and a bottom line, wherein the third horizontal plane has a third tangent at an intersection between the third horizontal plane and the center vertical plane that is an angle to the first tangent. Both tangents are between 0.05° and 2.0° to the first tangent, and are selected specifically to a particular golfer's swing speed.

A server / client system provides packet communications between a server and a client by way of a network such as the Internet. The server inputs data such as MIDI data in a sporadic manner while storing timing data representing their input timings. Then, the server performs packetizing of the sporadically input data, which accompany the timing data and are subjected to transmission to the client. The client receives the packetized input data and then outputs them at timings based on the timing data. Thus, it is possible to completely secure the same time relationship of data during transmission and reception of the sporadically input data even though the client differs from the server on a time-axis basis.

The 3D image display device disclosed herein includes an image display panel outputting image signals; and a parallax barrier arranged in front of the panel, being spaced at a particular distance, and having a plurality of transparent portions. The transparent portions of the barrier have a plurality of transverse lines, each of which forms one cycle, and the transparent portions that are adjacent to each other in the longitudinal direction in one cycle are arranged to emit images to different fields of view, respectively. The panel operates on and off by lines in the transverse direction based on views.

The present invention provides a voltage regulator, with an output short circuit current limiting function, which is capable of controlling a value of an output short circuit current to a set value in order to suppress dispersion. A constant current source is used instead of an output short circuit current detecting resistor of an output short circuit current limiting circuit, whereby an output short circuit current can be controlled to a set value, and dispersion in the output short circuit current can be suppressed.

The invention relates to a laser three-dimensional scanning device and a laser three-dimensional scanning method. The device comprises a first transmission grating, a second transmission grating, a third transmission grating, a first acoustic optic deflector, a second acoustic optic deflector, a first lens, a first half wave plate, a second lens, a third acoustic optic deflector, a third lens, a second half wave plate, a fourth lens, a fourth acoustic optic deflector and a micro objective, which are arranged along the direction of a light path. The method comprises the following steps: injecting periodical sound waves in the first acoustic optic deflector and the second acoustic optic deflector; and injecting chirped sound waves in the third acoustic optic deflector and the fourth acoustic optic deflector. The device realizes three-dimensional scanning by adopting the four acoustic optic deflectors; and because existing acoustic optic deflectors can completely reach microsecond acousto-optic interaction time, the device can completely realize microsecond quick scanning in XYZ three-dimensional directions.

The invention provides a method for testing the resolution of each imaging region of a digital camera. A camera to be tested is used for shooting resolution test plates to obtain photos, and the photos are treated according to the following steps: 1. converting into gray level images; 2. calculating the diameters of the photo images; 3. carrying out dark corner light loss correction; 4. carrying out binaryzation on the images; 5. dividing a plurality of pixel blocks to be used as foreground pixel blocks; 6. removing the foreground pixel blocks positioned at edges or corners of the photos or the foreground pixel blocks with too small area; 7. establishing a plurality of concentric circles for dividing the photo images into a plurality of annular regions; and calculating the astigmation of each annular region; and 8. calculating the relative astigmation and the resolution of each annular region in the photo images. The invention can determine the clear usable region of the photos shot by a set of camera equipment, and can also compare the resolution difference in different proportions between the whole shooting picture and the middle cut image, and the shooting method with the maximum resolution can be found, so the required shooting number is minimum on the premise that the resolution in the conversion is maximum or the resolution is ensured.

Disclosed herein is a pixel circuit, including: three pixels to which three primary colors are allocated; a power supply line. In the pixel circuit, each of the three pixels includes a sampling transistor configured to sample an image signal, a retaining capacitor configured to retain the sampled image signal, a drive transistor configured to output drive current corresponding to the retained image signal within a predetermined light emission period, and a light emitting element configured to emit light in the color allocated to the three pixels in response to the drive current. The pixel circuit includes a single switching transistor disposed commonly to the three pixels for connecting the drive transistors of the pixels to the power supply line within the light emission period.

An activating grinding aid for industrial waste residues is prepared from catalyst (1-8 wt.%), activating agent (30-80 wt.%), setting regulator (0-20 wt.%), grinding aid (3-12 wt.%) and carrier (3-30wt.%). Its advantages are effective use of industrial waste residues, low electric consumption of grinder, and improve cement performance.

The present invention relates to an optical switch apparatus made to successively carry out the route switching with respect to frame signal light inputted through various paths while eliminating the dispersion of an output power value. In the optical switch apparatus, input side deflecting units are disposed in corresponding relation to a plurality of input ports and output side deflecting units are disposed in corresponding relation to a plurality of output ports. Each input side deflecting unit and each output side deflecting unit are constructed in a manner such that a plurality of optical deflecting elements made to deflect signal light in response to an electric field applied are arranged in a cascade fashion, and the optical deflecting element constituting the input side deflecting unit or the output side deflecting unit is made so as to variably adjust the level of signal light to be outputted from the output side deflecting unit to the output port.

The invention provides a method for visually testing the resolution of each imaging area of a digital camera, which comprises the following steps of: converting a photo into a gray level image; calculating the diameter of the image of the photo; performing vignetting glossiness loss correction; performing binaryzation on the image; marking a plurality of pixel blocks as foreground pixel blocks; removing the foreground pixel blocks from the corners of the photo or the foreground pixel blocks with small areas; by taking the centre of the image of the photo as the centre of a circle, establishing a plurality of concentric circles to divide the image of the photo into a plurality of circular areas and representing image divergence degrees in each circular area by using rectangular images; and according to neighboring relations of the circular areas, sequentially splicing all the obtained rectangular images into a test result graph. The method not only can determine a clear and available area of the photo shot by a set of shooting equipment, but also can compare the resolution of the fully-shot photo with that of middle screenshots of different ratios to find a shooting method through which maximum resolution can be realized, thereby ensuring that the definition in copying can be maximal or the number of the shot photos is the smallest on the premise of ensuring the definition.

Provided is a probe set having the same level of hybrid stability when a plurality of probes are assigned to an identical nucleic acid to be detected. The probe set is adjusted in the binding strength, for example a Tm value, of each probe in consideration of the nucleotide length of single strand portions located on both sides of a hybrid composed of a nucleic acid to be detected and the probe. If necessary, a probe is assigned to a complementary strand of the nucleic acid to be detected. A probe substrate bound with the probe set is also provided.

A voltage regulator has an output MOS transistor connected between a voltage source and an output terminal. A voltage dividing circuit is disposed between the output terminal and GND. An error amplifier receives a reference voltage from a reference voltage circuit and a division voltage from the voltage dividing circuit. A current limiting circuit is disposed between the voltage source and the output terminal. The current limiting circuit has a first MOS transistor connected to the voltage source. A current source circuit is disposed between the first MOS transistor and the output terminal. A resistor is connected to the voltage source. A second MOS transistor is controlled based on a current caused to flow through the first MOS transistor. A third MOS transistor is connected between the voltage source and an output terminal of the error amplifier and is controlled based on a current caused to flow through the resistor. When a current caused to flow through the first MOS transistor reaches a predetermined current, the current limiting circuit controls the output MOS transistor to limit a current outputted through the output terminal.

Wavelength-selective external resonators can be used to greatly increase the output brightness of dense wavelength beam combining (DWBC) system beams by stabilizing the wavelengths of the beams emitted by the individual emitters of the DWBC laser source. The present invention pertains to external resonant cavities that utilize thin-film filtering elements as wavelength-selective elements in external resonators. The present invention further pertains to particular embodiments that utilize thin-film filtering elements in DWBC systems as both output beam coupling elements and wavelength selective elements. The present invention provides advantages over the prior art that include decreased cost, increased fidelity of wavelength selection, and increased wall plug efficiency.

An electrically small antenna is disclosed that is directional, has over an octave bandwidth, is non-dispersive, is inexpensive to mass produce, and allows transmitter and receiver electronic components to be integrated into the antenna.

A wavelength-selective cross-connect (WSXC) device having N input ports and M output ports and configured to route any set of one or more carrier wavelengths from a corresponding input port to any selected output port. In one embodiment, the WSXC device includes a diffraction grating and a beam-steering device optically coupled to each other and to the input / output ports so that each of the carrier wavelengths traverses the diffraction grating and the beam-steering device two or more times en route from the respective input port to a designated output port. Various unfolded configurations of the WSXC device are also disclosed.

A vehicle headlamp has semiconductor-type light sources and lenses. Emission surfaces of the lenses are made of free curved faces controlled to be curved so that: projection images of light emitting chips of the semiconductor-type light sources, which is emitted from the emission surfaces, are not convexly curved in an upward direction from cutoff lines on a screen light distribution of a light distribution pattern for low beam. As a result, the vehicle headlamp can achieve downsizing, weight reduction, and cost reduction. In addition, the precision of assembling an optical element can be improved.

The invention discloses an OFDM (Orthogonal Frequency Division Multiplexing)-technique-based TOF (Terahertz-Over-Fiber) wireless communication system device and method. The OFDM-technique-based TOF wireless communication system device comprises a central station, a base station and a subscriber unit, wherein the central unit is connected with the base station through a single mode fiber, the base station transmits OFDM terahertz wave signals generated by the central station through a high frequency antenna, and finally, the subscriber unit performs wireless receiving. The device and method disclosed by the invention can effectively solve the problems of dispersion during fiber communication and polarization mode dispersion, and meanwhile, the use ratio of channel band width can be improved, thereby realizing stable and long-distance communication.

A pixel circuit includes: a light emitting element; a driving transistor for applying current to the light emitting element in response to a signal value applied between a gate and a source thereof when a driving voltage is applied between a drain and the source thereof; first and second capacitors connected in series between the gate and the source of the driving transistor; a sampling transistor connected between the gate of the driving transistor and a predetermined signal line; a switching transistor connected to supply a potential of the signal line to a node between the first and second capacitors; and a light detection element connected between the gate of the driving transistor and the node between the first and second capacitors for supplying current of a current amount in accordance with an emitted light amount of the light emitting element.

The invention relates to the photovoltaic power generation technology, and aims at providing a compact double reflection-type photovoltaic condenser based on compound eyes. The compact double reflection-type photovoltaic condenser based on the compound eyes comprises a photovoltaic cell and an optical collector, wherein the upper surface of the optical collector comprises a free curved surface and a refraction curved surface, the lower surface of the optical collector comprises a transmission plane and a reflection plane, the center of the refraction curved surface and the center of the reflection plane are positioned at the same vertical position, the center of the free curved surface and the center of the transmission plane are positioned at the same vertical position, and the free curved surface is arranged at a focal position of the refraction curved surface; and the photovoltaic cell is arranged outside the optical collector and adjoins to the transmission plane, the photovoltaic cell is positioned at a focal position of the free curved surface, and the aperture of the transmission plane is larger than that of the photovoltaic cell. The compact double reflection-type photovoltaic condenser has the advantages that the photovoltaic conversion efficiency of the photovoltaic cell is improved, the service life of the photovoltaic cell is prolonged, an optical plastic PMMA (polymethyl methacrylate) is adopted and is prone to injection molding and processing, light in weight and applicable to large-scale processing, and the processing cost is reduced.

An optical sensor circuit has a photodiode PD, a MOS transistor Q1, a voltage controller 13 which supplies a gate voltage and a drain voltage to the transistor, etc. The voltage controller includes initial setting means 15. In the initial setting means, an electrostatic capacitance element of the photodiode is charged / discharged while setting a gate voltage of the transistor Q1 to a high gate voltage value VgH, only for a predetermined time period, and setting a drain voltage to a low drain voltage value VdL, only for a predetermined time period. Thereafter, the drain voltage is set to VdH, and, after elapse of a predetermined time period, the gate voltage is set to VgL. VgH, VdH, and VdL satisfy relational expressions of “VgH−VdH<Vth and VgH−VdL>Vth where Vth: a threshold voltage of the MOS transistor Q1”.

The invention discloses a broad spectrum optical fiber collimator. The broad spectrum optical fiber collimator comprises a thermal-expanding core optical fiber head, an achromatic lens and an outer sleeve, wherein the thermal-expanding core optical fiber head and the achromatic lens are arranged in the outer sleeve in a straight line, and an air layer is arranged between the thermal-expanding core optical fiber head and the achromatic lens, the thermal-expanding core optical fiber head and the achromatic lens have the same optical axis, and the outer sleeve is provided with a fixed central axis; the broad spectrum optical fiber collimator has the characteristics that a rear end face of the achromatic lens is vertical to the outer sleeve, the distance between the rear end face of the achromatic lens and a front end face of the thermal-expanding core optical fiber head is the thickness of the air layer in the middle, and is equal to the difference of an effective focus length of the achromatic lens and the distance between the rear end face of the achromatic lens and a primary side of the achromatic lens. Compared with the traditional collimator, the broad spectrum optical fiber collimator provided by the invention greatly reduces the insertion loss of an incident light beam; the core diameter of the thermal-expanding core optical fiber head is magnified by 3-5 times; an emergent light beam has a large spot diameter, and a small emergent aperture angle; and the chromatic dispersion caused by the broad spectrum is eliminated, the system transmission performance is improved, and the alignment error is low.

The present invention relates to an OPCPA apparatus. The OPCPA of the present invention includes an optical pulse stretcher (100) for outputting chirped laser light using odd-order dispersion (third-order dispersion is mainly used). A pump laser (200) outputs pump laser light. An OPA unit (300) receives the pump laser light and the chirped laser light (signal), amplifies the signal using the pump laser light, and generates an idler. An optical signal separation unit (400) separates output light of the OPA unit into the signal, the idler, and remaining light (pump). An optical pulse compressor (600) compensates for pulse chirping caused by odd-order dispersion that is imparted by the optical pulse stretcher, thus temporally compressing the signal and the idler, which overlap each other.

The invention discloses a profiled high conductivity copper-tungsten electrical contact material and a processing technique thereof. the processing technique is characterized by firstly choosing copper powder and tungsten powder with suitable granularity and mixing the powders according to a certain proportion; carrying out to-and-fro heat treatment, press forming and smashing on the mixed raw powder, then isostatically pressing a required shape and sintering the shape with electric sparks into copper tungsten blanks; lastly, carrying out vacuum infiltration on the prepared copper and the sintered blanks to ensure that copper can be totally infiltrated into the body during material production to produce the profiled high conductivity copper-tungsten electrical contact material with the porosity of less than 0.15%. The electrical contact produced by the contact material simplifies construction of electric switches, eliminates the dispersivity of the springs in the switches and greatly improves the reliability of components. The material is widely used in high temperature materials, electrical alloys for high voltage switches, electromachining electrodes, microelectronic materials and the like.

The invention relates to a plate structure multi-defect detection method based on DBSCAN and k-means algorithm. The method comprises the following steps: 1) collecting a damage signal of a plate structure, and performing difference processing on the damage signal and a health signal acquired under the same condition to acquire a difference signal; 2) acquiring a direct wave difference feature signal based on the difference signal; 3) determining candidate defect data points based on a pre-selected feature signal threshold; 4) performing defect quantitation and positioning by utilizing the DBSCAN and k-means algorithm according to the candidate defect data points. Compared with the prior art, the defect amount can be accurately judged by utilizing an intelligent algorithm when multiple defects are existent and the amount of the defect is unknown, the influences from the external noises, the frequency dispersion of the Lamb wave, the boundary reflection and the modal conversion at the defect can be effectively eliminated, the signal-to-noise ratio is improved, multi-defect can be accurately positioned, and the method has relatively high engineering application value.

An optical sensor circuit has a photodiode PD, a MOS transistor Q1, a voltage controller 13 which supplies a gate voltage and a drain voltage to the transistor, etc. The voltage controller includes initial setting means 15. In the initial setting means, an electrostatic capacitance element of the photodiode is charged / discharged while setting a gate voltage of the transistor Q1 to a high gate voltage value VgH, only for a predetermined time period, and setting a drain voltage to a low drain voltage value VdL, only for a predetermined time period. Thereafter, the drain voltage is set to VdH, and, after elapse of a predetermined time period, the gate voltage is set to VgL. VgH, VdH, and VdL satisfy relational expressions of “VgH−VdH<Vth and VgH−VdL>Vth where Vth: a threshold voltage of the MOS transistor Q1”.

A fiber optic scanning interferometer in a Michelson arrangement using a polarization splitting coupler is disclosed. The splitting of s and p polarization modes into the fast and slow axes of a birefringent fiber allows the temporal separation of interference phenomena from multiple reflections such that signal recovery is simplified.

The present invention relates to optical stereoscopic glasses which achieves simple structure, adjustable, cost effective, strong sense of adaptation and harmless to eyes, which allows to perceive stereoscopic vision when viewing the screen plane of movie, TV, computer and cellular phone.

A spread polarization transmitter for transmitting at least one light signal comprises a spread-spectrum communication apparatus and a polarization modulator. The spread-spectrum communication apparatus modulates the at least one light signal according to a spread-spectrum modulation technique. The polarization modulator comprises a polarizer and a magnetic bubble waveguide. The polarizer is capable of polarizing the at least one spread-spectrum modulated light signal in a polarized direction. And the magnetic bubble waveguide, which is configured in accordance with a pseudo-random polarization code sequence such that the plurality of magnetic bubble domains assume a time varying position representative of the pseudo-random polarization code sequence, is capable of receiving at least one polarized, spread-spectrum modulated light signal. Thereafter, the magnetic bubble waveguide is capable of at least partially rotating the polarized, spread-spectrum modulated light signals by a predetermined angle from the polarized direction during transmission therethrough to create spread polarization modulated light signals.