55results about How to "Effective focus" patented technology

This invention relates to methods and apparatus for displaying images holographically. A method of displaying an image holographically using a spatial lightmodulator (SLM), said SLM having a plurality of SLM pixels, the method comprising: displaying a diffraction pattern on said pixels of said SLM; and illuminating said pixels of said SLM such that light diffracted by said diffraction pattern on said SLM pixels comprises a content of said displayed image, a variation in brightness of said displayed image across said displayed image being modulated by an intensity envelope determined by the diffraction pattern of an individual said pixel, for example a sinc envelope; and wherein the method further comprises moving a peak or centre of gravity of said intensityenvelope away from a zero order spot and towards a centre of said displayed image by imposing a pattern of phase delay across said SLM pixels, said pattern of phase delay repeating at a spatial interval corresponding to a pixel interval of said SLM.

The invention discloses a sand collecting device of a highway and railway dual-purpose track sand removing vehicle, which can be articulated with driving equipment capable of traveling on the highway and the railway simultaneously. According to the invention, a sand collecting motor is in butt-joint with a hydraulic system of the driving equipment, sand accumulated in a scattered mode on railway tracks can be effectively centralized through cooperation between scraping plates and a bottom plate and discharged from the tail end of the bottom plate, a transverse conveying mechanism is arranged at the discharge position, and the centralized sand is discharged out outside the tracks or two sides of the highway subgrade. Meanwhile, the bottom plate of the sand collecting device is provided with an inward convex groove, the track can be accommodated in the groove when a railway sand removing operation is carried out, and the middle part of the front end of the bottom plate can be directly placed at the upper surface of the track, thereby being more thorough in sand removing. Compared with existing manual sand removing and small sand removing equipment, the sand collecting device disclosed by the invention is higher in efficiency, higher in automation degree, and capable of cleaning the accumulated sand on the railway outside the subgrade quickly and efficiently no matter what kind of sand discharging equipment is equipped at the outlet end of the bottom plate, thereby ensuring safe operations of a line.

The invention discloses a migration tube and an ion mobility spectrometer with the migration tube for axial focusing under atmospheric pressure. The migration tube comprises an outer wall, wherein the outer wall comprises electrode rings and insulating rings, which are arranged at intervals; the inner diameters of an inlet and an outlet are kept consistent; the insulating rings wrap the electrode rings; symmetrical drift air inlets are arranged in the outer wall of one end, close to the outlet; a focusing electrode is arranged in the migration tube and is coaxial with the migration tube; and an axial hole is arranged in the middle of the focusing electrode. The ion mobility spectrometer with the migration tube for axial focusing under the atmospheric pressure comprises a straight migration part, the migration tube and a mass spectrometer which are sequentially connected; an ion gate is arranged at the connected part of the straight migration part and the migration tube; and set voltage is applied to the migration tube. Ion axial focusing is achieved by optimizing parameters of the migration tube, applying certain voltage to the electrode and arranging the focusing electrode with the hole on the outer side; and the number of ions passing through the hole is increased, so that the mass spectrometry detection performance and sensitivity are improved.

The invention discloses a device for interpreting fractured reservoir prediction. By the device, the seismic wave nonlinear dynamics properties, such as redundant dictionaries and chaos, of a fractured reservoir are computed; and by adopting a high order accumulation processing technology, non-gaussian seismic signals of the fractured reservoir can be processed and computed, so that the density aggregation projection analysis of acquired seismic attributes representing the fractured reservoir can be realized. According to the device, a computer is used for assisting in the completion of the interpretation of the fractured reservoir, so that favorable reservoir prediction files are formed. The device has the advantages of high computational efficiency, objective and accurate fractured reservoir interpretation results, and the like; and by the device, the accuracy of the reservoir interpretation and the seismic interpretation efficiency can be effectively improved.

The invention provides a high-frequency electromagnetic induction focusing welding device comprising a welding platform, a high-frequency focusing induction heating head arranged at the upper end of the welding platform and a high-frequency electromagnetic generator arranged at the lower end of the welding platform and connected with the high-frequency focusing induction heating head. A three-dimensional movement mechanism used for driving the high-frequency electromagnetic generator to conduct three-dimensional movement is arranged above the welding platform, the high-frequency focusing electromagnetic induction heating head comprises a plurality of conical ferrites and hollow induction coils wound around the peripheries of the conical ferrites, and each hollow induction coil is filled with cooling liquid capable of flowing circularly. The high-frequency electromagnetic induction focusing welding device is simple in structure, the conical ferrites are the solid conical ferrites, a magnetic field generated by each hollow induction coil can be effectively focused on the conical tip of the corresponding conical ferrite, and therefore the magnetic flux density of the conical near-end position of each conical ferrite is greatly enhanced, and good induction heating can be achieved even in a micro-nano scale. Therefore, the purpose of micro-nano-scale welding is achieved, and the warping phenomenon of substrates can be reduced.

The invention discloses a reflecting cover for a LED lamp. The reflecting cover for the LED lamp comprises reflecting cavities, LED lamp holes are formed in the roots of the reflecting cavities, lightoutlets are formed in the tops of the reflecting cavities, and reflection layers are arranged on the inner cavity walls of the reflecting cavities; and the calibers of the reflecting cavities are gradually increased from the roots to the tops, the reflecting cavities are at least two, the reflecting cavities are arranged side by side and are connected with one another, and the tops of the reflecting cavities are further provided with an outer ring end surfaces. According to the reflecting cover for the LED lamp, due to the fact that LED bulbs in a LED lamp illuminating device are independent,the reflecting cover of the LED lamp is also provided with a plurality of reflecting cavities which can cooperated with each independent LED bulb, so that the focus can be effectively carried out, and the LED lamp can illuminate more far; and in addition, the outer ring end surface more facilitates the installation.

The invention discloses a small-volume large-view-field multi-channel terahertz array detection imaging system comprising a terahertz imaging front end, a signal processing module and a main control module. The terahertz imaging front end includes a terahertz lens including a curved microlens group and a folding lens, a terahertz array chip with a detection antenna structure as a basic pixel, anda readout circuit. The target tracking and recognition are realized by using an image stitching algorithm, a detection-and-tracking algorithm, and an abnormal pixel detection and interpolation compensation method and the system robustness is improved. The system is suitable for the military defense application fields like the wide airspace supervision and guidance.

The invention discloses a sand collecting device of a highway and railway dual-purpose track sand removing vehicle, which can be articulated with driving equipment capable of traveling on the highway and the railway simultaneously. According to the invention, a sand collecting motor is in butt-joint with a hydraulic system of the driving equipment, sand accumulated in a scattered mode on railway tracks can be effectively centralized through cooperation between scraping plates and a bottom plate and discharged from the tail end of the bottom plate, a transverse conveying mechanism is arranged at the discharge position, and the centralized sand is discharged out outside the tracks or two sides of the highway subgrade. Meanwhile, the bottom plate of the sand collecting device is provided with an inward convex groove, the track can be accommodated in the groove when a railway sand removing operation is carried out, and the middle part of the front end of the bottom plate can be directly placed at the upper surface of the track, thereby being more thorough in sand removing. Compared with existing manual sand removing and small sand removing equipment, the sand collecting device disclosed by the invention is higher in efficiency, higher in automation degree, and capable of cleaning the accumulated sand on the railway outside the subgrade quickly and efficiently no matter what kind of sand discharging equipment is equipped at the outlet end of the bottom plate, thereby ensuring safe operations of a line.

The invention discloses a full-screen focusing method and a camera. The full-screen focusing method includes the following steps: dividing the full screen into a plurality of first focusing areas according to predetermined rules; focusing on each of the first focusing areas to obtain The first lens of each first focus area needs to run the distance value; Run the lens and take the first photo respectively according to each described first lens needs to run the distance value; Select the corresponding first focus area on each first photo, and each A focus area is stitched into a second photo and output to the display screen. The full-frame focusing method provided by the present invention divides the whole frame into a plurality of first focus areas, each of the first focus areas respectively focuses and takes pictures, and cuts these pictures to form the whole picture, so that each area of ​​the full picture have been effectively focused.