240results about How to "Achieve imaging" patented technology

New methods of ultrasound imaging are presented that provide images with reduced reverberation noise and images of nonlinear scattering and propagation parameters of the object, and estimation of corrections for wave front aberrations produced by spatial variations in the ultrasound propagation velocity. The methods are based on processing of the received signal from transmitted dual frequency band ultrasound pulse complexes with overlapping high and low frequency pulses. The high frequency pulse is used for the image reconstruction and the low frequency pulse is used to manipulate the nonlinear scattering and/or propagation properties of the high frequency pulse. A 1st method uses the scattered signal from a single dual band pulse complex for filtering in the fast time (depth time) to provide a signal with suppression of reverberation noise and with 1st harmonic sensitivity and increased spatial resolution. In other methods two or more dual band pulse complexes are transmitted where the frequency and/or the phase and/or the amplitude of the low frequency pulse vary for each transmitted pulse complex. Through filtering in the pulse number coordinate and corrections of nonlinear propagation delays and optionally also amplitudes, a linear back scattering signal with suppressed pulse reverberation noise, a nonlinear back scattering signal, and quantitative nonlinear scattering and forward propagation parameters are extracted. The reverberation suppressed signals are further useful for estimation of corrections of wave front aberrations, and especially useful with broad transmit beams for multiple parallel receive beams. Approximate estimates of aberration corrections are given. The nonlinear signal is useful for imaging of differences in tissue properties, such as micro-calcifications, in-growth of fibrous tissue or foam cells, or micro gas bubbles as found with decompression or injected as ultrasound contrast agent.

The invention discloses a star machine united bistatic synthetic aperture radar two-dimensional frequency domain imaging method based on airspace domain expansion. By utilizing the characteristic that airspace expansion of distance history and second-order time domain of reference point distance history are approximate, a phase is expressed to a quadratic polynomial with respect to the slow time, and a stationary phase method is utilized to obtain a two-dimensional spectrum of a signal, good focus results can be obtained through azimuth and distance compression, and finally linear relationship of scattering point position is utilized to peel coordinates of the distance and the azimuth from a coupling term so as to obtain the correct coordinates. Therefore, the invention overcomes the complex process of two-dimensional spectrum calculation and target spatially variable compensation and realizes star machine united bistatic synthetic aperture radar imaging in larger scenes. The invention can be applied to the fields of synthetic aperture radar imaging, earth remote sensing, and the like.

The invention discloses an MEMS (Micro Electro Mechanical System) infrared sensor based on film bulk acoustic resonator and a preparation method of the MEMS infrared sensor. The MEMS infrared sensor sequentially comprises a metal block, a piezoelectric oscillation pile and an acoustic wave reflection layer, wherein the piezoelectric oscillation pile and the metal block are sequentially deposited on the acoustic wave reflection layer; the piezoelectric oscillation pile comprises a bottom electrode, a piezoelectric layer and an upper electrode which are sequentially deposited on the acoustic wave reflection layer; the upper electrode is arranged on the surface of the infrared sensor and called as an infrared window film; the material of the infrared window film is a conductive film with infrared transmittance rate, so that infrared light irradiates the piezoelectric layer by transmitting the upper electrode; the acoustic wave reflection layer comprises a substrate, a support layer and an air cavity; the support layer is deposited on the substrate; the air cavity is formed between the substrate and the support layer; the piezoelectric oscillation pile is deposited on the support layer. The MEMS infrared sensor is small in size, low in production cost and simple in preparation process; the MEMS infrared sensor can be repeatedly used and is capable being produced in batches and integrating arrays, low in production cost, easily compatible with external circuits, free of refrigeration and sensitive to the overall infrared wave band.

The invention discloses a label-free cell detection device and method based on light sheet illumination. The method includes the steps that a light sheet generation unit is used for shaping a laser beam into a uniform illumination light sheet with the micron-order thickness through a cylinder lens; the light sheet excites particles or a cell suspension placed in a sample micro-cavity chamber controlled by a precise displacement table to move; a form microscopic image and a two-dimensional light scattering pattern of a single particle or cell are recorded by a detector under the focusing mode and the defocusing mode through an objective lens; and a result is input into an imaging analysis system for image processing and recognizing and classifying. By means of the light sheet illumination method, a stimulation area can be effectively limited, background interference in light scattering imaging is inhibited, and effective stimulation of the single particle or cell and particle size discrimination of the sub-micron resolution ratio level are realized; and a light sheet illumination stimulation two-dimensional light scattering technology can avoid complex dyeing operation and a fluorescence signal detection process, and label-free detection and classification are carried out on aging cells. The label-free cell detection device and method based on light sheet illumination are high in applicability and capable of being popularized.

The embodiment of the invention provides a photographing method and a mobile terminal. The method comprises the following steps of: monitoring brightness information of a photographing scene; while monitoring that the brightness information of the photographing scene is less than a first brightness threshold value, controlling a black and white sensor camera to focus and image a target object in the photographing scene so as to obtain a black and white image; performing object feature identification of the black and white image so as to determine feature areas of various objects in the black and white image; and complementing colours of the feature areas of various objects in the black and white image so as to obtain a coloured image corresponding to the black and white image. According to the embodiment of the invention, the image is photographed by using the black and white sensor camera in a low-illumination environment; object feature area identification of the photographed black and white image is carried out; the colours of the feature areas of various identified objects are complemented correspondingly; therefore, the coloured image corresponding to the black and white image is obtained; imaging of the coloured image in the low-illumination environment is realized; imaging is clear; and the effect is good.

The invention relates to a fundus optical full-field microangiography imaging device and method. The device comprises a fundus illumination optical path, a fundus imaging optical path, a synchronous triggering source and a data processing system, wherein the fundus illumination optical path and the fundus imaging optical path are synchronously triggered by the synchronous triggering source; the fundus illumination optical path comprises a light source controller, a laser light source, a beam expanding lens, a beam splitter lens and an eye piece objective lens which are sequentially connected; and the fundus imaging optical path comprises an eye piece objective lens, a beam splitter lens, an imaging ocular lens, a lens and a COMS (Complementary Metal Oxide Semiconductor) camera which are sequentially connected. The device and the method have the advantages that the light source gives out laser at the same frequency as the sampling frame rate of the camera; the realization of the fundus microvessel imaging is ensured; and meanwhile, the laser power is reduced, so that the value reaches the range capable of being borne by human eyes. The method and the device can realize the fundus optical full-field microangiography imaging. The method has the advantages that a contrast agent is not needed; the resolution ratio, the signal-to-noise ratio and the detection depth are high; and the fundus blood capillary can be rebuilt.

The invention relates to a metal film lens with nano-suture, and is characterized in that: an incident wave is firstly determined, and then proper substrate material is chosen, a layer of metal film is vapor deposited on a substrate, the incidence of the incident wave is vertical to the surface of a metal film, and then the skin depth of the incident wave in the chosen metal film is computed; the direction of X axis is chosen along the metal film, and sampling is implemented along the forward direction of X axis; then the width of the metal suture of each sample point is computed by computing the phase offset and the propagation constant of each sample point; a suture distribution along the negative direction of the X axis which is symmetrical to the suture distribution along the forward direction is chosen; finally the suture width of each sample point is obtained according to the design; then a metal film lens with nano-suture is produced by using the existing processing technology. The invention can change the suture distribution of the metal film lens according to the position of any given objective image to achieve the near field imaging or the distant field imaging, simultaneously the designed lens of the invention has simple structure, and can be used for the optical system integration extremely conveniently, the lens has extensive application prospect.

The invention discloses a top-end-extended cross terahertz absorption structure and an application thereof. The structure is characterized in that a common cross metamateiral structure is changed to be a top-end-extended cross metamaterial structure. Compared with the common cross metamaterial structure, the top-end-extended cross metamaterial structure is smaller in size, achieves zooming from 60mum to 30mum and achieves identical frequency terahertz radiation absorption. By means of the structure, the antenna size is greatly reduced, and more importantly, the structure can be arranged on a microbridge structure for a terahertz room temperature detector. The structure has the advantages of being small in size, simple in structure and high in terahertz radiation absorption and capable of being compatible with the existing microbridge structure to make the terahertz room temperature detector, and the detection imaging resolution is improved.

The invention discloses a second harmonic imaging method and a second harmonic imaging device for single suspended particles. According to the method, Bessel laser is adopted for effectively capturing the suspended particles, and remote noncontact and noninvasive capture and high capture efficiency are realized; imaging is realized by second harmonic signals generated on the particles by femtosecond laser, polarization resolution, spectral resolution and three-dimensional imaging are realized, and imaging and observation of fine particles are realized. The device for implementing the second harmonic imaging method has advantages that due to adoption of common optical devices, low cost is realized while imaging of the second harmonic signals can be well realized, and suitableness for popularization is achieved.

The invention provides a preparation method of a quaternary ammonium salinized fluorescent carbon dot and application of the quaternary ammonium salinized fluorescent carbon dot in bacterium resisting and gram positive bacterium and gram negative bacterium differentiating. The preparation method of the quaternary ammonium salinized fluorescent carbon dot mainly comprises the two steps that a surface-aminated carbon dot is prepared, and then alkyl betaine is grafted to the surface of the aminated carbon dot to obtain the quaternary ammonium salinized carbon dot. The prepared quaternary ammonium salinized carbon dot has the good water solution dispersibility and the low cytotoxicity and can effectively inhibit and kill gram positive bacteria. In addition, the quaternary ammonium salinized carbon dot has the good fluorescent property and can selectively enable the gram positive bacteria to be imaged to effectively differentiate the gram positive bacteria and gram negative bacteria.

The invention discloses a fog-penetrating and night-vision system based on a refrigeration type CCD element. The fog-penetrating and night-vision system is a device detecting the emitted or reflected light of objects in different wave bands (visible light and near-infrared band) and realizing imaging; the functions of fog-penetrating and night-vision of the device are greatly enhanced; the refrigeration type CCD element is used to increase the resolution ratio and sensibility of the imaging system; high-performance real-time image fusion and enhancing treatment algorithm is adopted, and all-weather remote target detection and imaging can be realized with low cost.

The invention discloses an electric control zooming plane lens which comprises a first electric control zooming liquid crystal lens, a second electric control zooming liquid crystal lens and a super lens with a fixed focal length which are cascaded. In a state of not applying an electric field, the arrangement direction of molecules in the first liquid crystal layer of the first liquid crystal lens is parallel to the overall mirror surface direction of the first liquid crystal lens, the arrangement direction of the molecules in the second liquid crystal layer of the second liquid crystal lensis parallel to the overall mirror surface direction of the second liquid crystal lens, and the arrangement directions of the molecules in the first liquid crystal layer and the molecules in the secondliquid crystal layer are perpendicular to each other. The electric field is applied to the first liquid crystal layer and the second liquid crystal layer respectively, and the molecular arrangement state of the first liquid crystal layer and the second liquid crystal layer is adjusted by adjusting the electric field intensity. The plane lens is the super lens with a fixed focal length. The planarlens group has an electric control zooming function and is insensitive to polarization based on the combination of the liquid crystal lens and the super lens which are arranged in a cascaded manner,a high-quality imaging effect is achieved and the practical application of the planar lens technology is promoted.

The invention discloses a time-domain imaging method of spaceborne-airborne bistatic synthetic aperture radar, which aims at the space variant characteristic of a spaceborne-airborne bistatic synthetic aperture radar system, and utilizes an airspace truncation error from history to eliminate an unequal-interval phenomenon of the distortion of the distance position of distance domain data of scattering points after variable metric inverse Fourier transform on the basis of the technology of the variable metric inverse Fourier transform. The unequal-interval phenomenon caused by applying a variable metric inverse Fourier transform algorithm to the imaging of the spaceborne-airborne bistatic synthetic aperture radar is overcome and corrected, so that the imaging of the spaceborne-airborne bistatic synthetic aperture radar in a large scene is realized without increasing overmuch operand. The time-domain imaging method can be applied in the fields of the imaging of the synthetic aperture radar, earth remote sensing and the like.

The invention discloses a photoacoustic microscope. The photoacoustic microscope comprises a microscope system, a signal collection control system and a driving system. The invention further discloses a method for monitoring breaking of microvesicles in biological tissue with the use of the photoacoustic microscope. The photoacoustic imaging is combined with features of high contrast ratio of optical imaging and high resolution ratio of acoustic imaging. Due to low scattering properties of acoustic signal transmission in tissue, deeper penetration degree is obtained compared with a conventional optical imaging method. There is no need to slicing tissue and the method is non-invasive so that long-term monitoring is achieved. Photoacoustic microscope imaging equipment helps achieve imaging of multiple anatomical positions.

The invention discloses preparation and application of a material for tumor photothermic treatment, and belongs to the field of biological medicine. The material comprises GNR, a mesoporous SiO2 layer wrapping the outer layer of the GNR, DOX loaded into pores of mesoporous SiO2, alkylation hydroxymethyl coumarin blocking mesoporous SiO2, and target hyaluronic acid on the outermost layer. After functional groups of the outer layer of SiO2 are modified into carboxyl groups, medicine loading is conducted through electrostatic interaction; after medicine loading, coumarin with alkyl chains are introduced through chemical grafting, an oily molecular layer is formed, and medicine leakage is prevented; in the material, ester bonds formed by coumarin molecules and the carboxyl groups on the surface of a silicon shell have light sensitivity, and the light response type intelligent release of medicine can be achieved; finally, molecules with long circulation and target molecules capable of being specifically combined with cancer cells are assembled on the material, and long circulation and dosage targeted performance are provided for the material.

The invention discloses a sound field measuring apparatus. The apparatus comprises a data processor, an excitation signal generator, an excitation signal amplifier, an energy transducer, a laser, a first image sensor and a second image sensor. The data processor, the excitation signal generator, the excitation signal amplifier and the energy transducer are sequentially connected. The laser, a divergent lens, a convex lens, a first spectroscope, the sound field generated by the energy transducer, a second spectroscope, a Fourier transformation lens and the first image sensor are sequentially arranged on the same straight line. A reflector is vertically arranged under a first spectroscope. A third spectroscope is vertically arranged under the second spectroscope. The reflector, the third spectroscope and the second image sensor are sequentially arranged on the same straight line. The first image sensor and the second image sensor are respectively connected with the data processor. The invention further provides a sound field measuring method. The sound field measuring apparatus and method can measure the sound field source pressure distribution and further measure the sound pressure in a quantitative way.

The invention discloses a core-shell type nano-contrast agent. The core-shell type nano-contrast agent comprises gadolinium ions and human serum albumin assembled outside the gadolinium ions and serving as a protecting group. The invention further provides a preparation method of the core-shell type nano-contrast agent. The core-shell type nano-contrast agent disclosed by the invention is combined with a nano-technology, and the human serum albumin is taken as a carrier for wrapping the paramagnetic metal gadolinium ions, thus MRI (magnetic resonance imaging) is realized, and biocompatibility and a tumor targeting property are improved; the prepared core-shell type nano-contrast agent has the advantages of small particle size and low biotoxicity; and the preparation method provided by the invention is simple.

The invention discloses a foresight view reinforcement device applied to low-altitude flight safety. The foresight view reinforcement device applied to low-altitude flight safety comprises a transmitting antenna, a receiving array control switch matrix containing a transmitting power amplifier connected with the transmitting antenna, and an internal standard module, a transmitter connected with the transmitting power amplifier and the internal standard module respectively, an array receiving antenna connected with the internal standard module, a receiver containing a radiofrequency receiver connected with the internal standard module, and an intermediate-frequency orthogonal demodulation receiver which are sequentially connected, a digital signal processing and control system connected with the intermediate-frequency orthogonal demodulation receiver, and a frequency synthesizer connected with the internal standard module, the transmitter, the radiofrequency receiver, the intermediate-frequency orthogonal demodulation receiver and the digital signal processing and control system respectively. The foresight view reinforcement device applied to low-altitude flight safety disclosed by the invention is capable of realizing imaging for targets dead ahead, and in front and below a flight route, meeting the needs of general aircraft avoidance, low-altitude obstacle avoidance, aircraft blind landing and the like during low-altitude airspace flight, and effectively solving the safety problem of civil low-altitude flight aircrafts during low-altitude flight.

The invention discloses fluorescent SiNDs (silicon nanodots). The fluorescent SiNDs are prepared from silane and Bengal rose with a hydrothermal method through one step. Compared with the prior art, the prepared SiNDs have ultrahigh fluorescent quantum yield (100%) and can realize long-time specific imaging of mammal cytolysosome. Besides, the imaging effect of lysosome of the SiNDs is not affected by cell cleaning, immobilization, permeabilization and the like and the fluorescent SiNDs have the advantages of cleaning resistance, immobilization resistance and permeabilization resistance. Meanwhile, the SiNDs also have the advantages of low preparation cost, simple synthesis method, good water dispersity, narrow fluorescent emission peak width, good photostability, good cytocompatibility, low photocytotoxicity and the like and are expected to become novel lysosome fluorescent probes.

The invention relates to a phosphorescent fluorinion probe based on an iridium complex, a preparation method thereof, and applications of the probe in the fields of fluorinion detection, and cell marking and imaging. The C^N ligand of the ionic type iridium complex comprises an isobutyl biphenyl Si-O group whose structural formula is shown in the description. When the ligand carries out reactions with fluorine ions, the Si-O bond will be broken, thus the excitation state and photo-physical property of the iridium complex are changed, so the fluorinion detection is achieved. The iridium complex can also be applied to the field of cell marking and imaging.

The invention discloses a camera module, a periscopic camera module, a camera assembly and an electronic device, and belongs to the technical field of intelligent equipment. The camera module comprises a fixed part, a lens assembly, an image sensor and a focusing assembly, and the fixed part is provided with an accommodating space; the lens assembly is arranged in the accommodating space and is arranged on the fixed part; an image receiving part is mounted on the fixed part in the accommodating space and is used for receiving light passing through the lens assembly; and the focusing assembly is accommodated in the accommodating space and is configured to move relative to the fixed part so as to change the distance of the light transmitted from the lens assembly to the image receiving part.According to the invention, the focusing assembly is used for adjusting the distance of the propagation path of the light between the lens assembly and the image sensor, thereby completing the focusing of the lens assembly, achieving the imaging of the image sensor, and enabling the length of the camera module in the optical axis direction of the lens assembly to be shortened.

The application discloses a synthetic method of a dye compound used for sensitive detection of singlet oxygen. Furthermore, a fluorescent probe having a part of different fluorescent groups of the dye compound is designed and is synthesized through a new synthetic method. The fluorescent probe can well react with singlet oxygen. The probe can be used for detecting singlet oxygen in fields of environment, food and bio-medical treatment. The probe can be used for making molecular probes, researching singlet oxygen and disease photodynamic therapy and manufacturing a singlet oxygen kit.