252results about How to "Wide spectral range" patented technology

A variable focus liquid lens is formed using two substrates with at least two through holes in at least one of the substrates. One end of each through hole is covered with a distensible membrane, one on the exterior surface of the substrate and the other on the interior surface. The substrates are sealed about the periphery to form a chamber and the chamber is filled with a liquid material. When pressure is applied to the membrane the liquid in the chamber is redistributed to form the lens. The variable focus liquid-filled lens is formed by providing a first and second substrate, forming at least two through holes in at least one of the first and second substrate, sealing one end of each of the at least two holes with a flexible transparent membrane, and sandwiching a liquid in a chamber formed between the first and second substrate.

Textured silicon solar cells and techniques for their manufacture utilizing metal sources to catalyze formation of randomly distributed surface features such as nanoscale pyramidal and columnar structures. These structures include dimensions smaller than the wavelength of incident light, thereby resulting in a highly effective anti-reflective surface. According to the invention, metal sources present in a reactive ion etching chamber permit impurities (e.g. metal particles) to be introduced into a reactive ion etch plasma resulting in deposition of micro-masks on the surface of a substrate to be etched. Separate embodiments are disclosed including one in which the metal source includes one or more metal-coated substrates strategically positioned relative to the surface to be textured, and another in which the walls of the reaction chamber are pre-conditioned with a thin coating of metal catalyst material.

Featured is a spectral analysis method and a wide spectral range spectrometer including a source of electromagnetic radiation and an optical subsystem configured to disperse radiation into a plurality of wavelengths. A pixilated light modulator receives the radiation wavelengths and is configured to direct one or more selective wavelengths to a sample.

A general method is provided for electronically reconfiguring the internal structure of a solid to allow precision control of the propagation of wave energy. The method allows digital or analog control of wave energy, such as but not limited to visible light, while maintaining low losses, a multi-octave bandwidth, polarization independence, large area and a large dynamic range in power handling. Embodiments of the technique are provided for large-angle beam steering, lenses and other devices to control wave energy.

The invention discloses a solar thermal power generation system by thermoelectric conversion, comprising a sunlight-concentrating and receiving module, a solar tracking module, a photothermal-conversion module for absorbing sunlight then transforming sunlight into thermal energy and a combination of semiconductor thermoelectric module, the combination-type cooling module is under the semiconductor thermoelectric module. In the invention, TE module can directly convert solar thermal and waste heat to electricity without heat transfer medium, heat storage tank, turbine, and mechanical moving part, thus realizing small scale, compact system with high efficiency; Due to the adopting of low concentrating lens with tracking system and compound waste heat supplying module, thus reducing floor area and effectively improving temperature difference and power generating efficiency of the overall system. In comparison with that of traditional solar thermal power generation system, the new system kept the advantages, including: low investment and low maintenance cost. In comparison with that of solar cell power generation system, the system has the advantages: large power in small area and possible in stable output; furthermore a heating source apart from solar energy is introduced to guarantee the stable current supply.

The invention discloses a handset casing testing apparatus and method based on computer vision. The apparatus comprises a high-definition camera, an auxiliary light source and an industrial control computer. The auxiliary light source illuminates the visual field range of the high-definition camera. The high-definition camera and the auxiliary light source are arranged on handset casing testing stations of a production line and can capture handset casing parts requiring precise tests. The industrial control computer is electrically connected with the high-definition camera and the auxiliary light source. The method comprises a camera calibrating step; an image acquisition step; an image processing step; and a test result outputting step. By adopting technologies based on image processing, the apparatus and method achieve that precise positioning and precise testing are effective ways for automated production. The computer vision technologies have the characteristics of non-contact measurement, relatively wide spectrum range and capabilities of working for long, etc. The technologies can be widely applied in the industrial field and used for rapidly and precisely testing product related indexes. A high speed is achieved. A low maintenance cost is further realized.

Method for fabrication of vector vortex waveplates of improved quality due to reduced singularity size and widened spectral band, the method comprising creating a boundary condition for vortex orientation pattern of a liquid crystal polymer on a substrate using materials with reversible photoalignment, equalizing exposure energy over the area of the waveplate by redistributing the energy of radiation used for photoalignment from the center of the beam to its peripheries, and using vector vortex waveplate as a linear-to-axial polarization converter. Fabrication of spectrally broadband vector vortex waveplates further comprises two or more liquid crystal polymer layers with opposite sign of twist.

The invention provides an on-line broad-spectrum water quality analyzer, which is characterized by comprising an ultraviolet visible light detection device, a near infrared light detection device, a controller in circuit connection with the ultraviolet visible light detection device and the near infrared light detection device respectively, a head shell, a connecting plate connected with the head shell, and a tail shell connected with the connecting plate, wherein the head shell, the connecting plate and the tail shell have sealing structures. Optical devices are hermetically arranged in a sealed inner chamber and are connected by optical fibers simultaneously, so that equipment meets the requirement of on-line underwater using and the using environment of the equipment is further widened; and spectrums of an ultraviolet visible light source and a near infrared light source are combined into a broad spectrum, so that a detection spectrum can cover a wider spectrum range.

The invention belongs to the field of optical test equipment and a use method thereof and particularly discloses an optical fiber dispersion measurement system which comprises a light source system and an interference measurement system, wherein the light source system comprises a pulse laser, an optical isolator, a narrow band filter slice, a reflector set and a photonic crystal optical fiber for a light source; the pulse laser, the optical isolator, the narrow band filter slice, the reflector set and the photonic crystal optical fiber for the light source are sequentially arranged along an optical path; the interference measurement system comprises a beam splitter, a measurement arm for receiving beams reflected and transmitted by the beam splitter, and a reference arm, and optical fiber assemblies to be measured are arranged in the measurement arm; both ends of the photonic crystal optical fiber for the light source are connected with a three-dimensional optical fiber coupling platform; and the beam splitter is additionally provided with an output end, the optical path arranged behind the output end is sequentially provided with a polarizer, a narrow band filter, an endless single mode photonic crystal optical fiber assembly and a data collection and treatment system. By selecting a highly nonlinear photonic crystal optical fiber with a special ventage structure as the photonic crystal optical fiber for the light source, the system can generate super-continuum spectrum white lights so as to measure a dispersion coefficient with high accuracy, high efficiency and low cost.

The invention discloses a light and small interference imaging spectrum full-polarized detection device comprising a preposed optics looking-out system, a static full-light modulation module, an angle shearing static interference imaging spectrometer, an imaging mirror set and a detector which are coaxially and successively arranged in sequence, wherein the detector is connected with a signal obtaining and processing system; after being collected, collimated and performed with stray light elimination by the preposed optics looking-out system, irradiation light emitted by a target source enters the static full-light modulation module; after passing through an angle shearing birefringent crystal set, one beam of modulation line polarized light is sheared into polarization light at an angle; after passing through an analyzer, the polarization light is divided into two beams of line polarized lights; the two beams of the line polarized lights are gathered in the detector after passing through the imaging mirror set; and the received signal is processed by the signal obtaining and processing system to obtain a target image, hyperspectral information and full-polarized information. The invention has the characteristics of compact and simple structure, no moving components and large luminous flux, can obtain a target two-dimensional space image, one-dimensional hyperspectral information and integral polarization information in one time.

The invention discloses a static Fourier transform interference imaging spectrum full-polarization detector, which comprises a fronting optical telescope system, a static all-optical modulation module, a static Fourier transform interference imaging spectrometer, an imaging lens group, an area-array detector which are arranged in sequence along the light transmission direction, wherein the area-array detector is connected with a signal acquiring and processing system; light emitted by a target source is collimated by the fronting optical system, and then is modulated by the static all-optical modulation module; after the modulated transmission light passes through the static Fourier transform interference imaging spectrometer, emergent light is changed into two beams of coherent light; the two beams of light pass through the imaging lens group and then are convergent on the area-array detector for imaging and interference; and a signal received by the area-array detector is sent to the signal acquiring and processing system for processing. The static Fourier transform interference imaging spectrum full-polarization detector has the characteristics of simple and compact structure, no moving parts, high luminous flux, and acquisition of target two-dimensional spacial images, one-dimensional spectral information and complete polarization information at one time.

An optical path structure of Fourier transform imaging spectrograph with high resolution and large field in total reflection type is prepared for imaging object on one-dimensional slit by three-reflection mode (TRM) pre-telescope, projecting slit image on Fresenel double-surface mirror and cutting slit image to be two correlation beams with certain cut angle, making two said beam be parallel beam after they are passed through TRM post collimator then projecting it to TRM cylindrical mirror in certain angle, focusing and projecting to surface of focal-plane detector for forming one-dimensional interference fringe and another-dimensional grey image distribution.

The optical system comprises: means for introducing a controlled negative or positive chirp to an incoming ultrashort laser pulse to be characterized; a nonlinear optical medium through which said chirped ultrashort laser pulse is propagated, wherein as a result of said propagation: different chirp values are introduced in the ultrashort laser pulse at different propagation distances along the nonlinear optical medium, and a transverse nonlinear signal is generated in a direction perpendicular to the propagation axis; analyzing means configured for recording a single-shot spectral image of said generated transverse nonlinear signal; and a processing module comprising one or more processors configured to execute a numerical iterative algorithm to said single-shot spectral image to retrieve the electric field, amplitude and phase, of the ultrashort laser pulse.

Characterizing material properties using a simple and inexpensive measurement circuit is disclosed. It allows measurement of the transfer function change of an acoustic wave device without necessitating detailed knowledge of the resonant frequency, by integrating the transfer function. If one examines the integral of the transfer efficiency of an acoustic wave device as the acoustic wave is damped, one sees that the magnitude of the total signal transfer decreases with increasing damping allowing derivation of the material parameters from the results of simple integration.

A series combination of a shortwave pass (SWP) filter and a longwave pass (LWP) filter is provided in an arrangement where the filters are separately and independently controlled by voltages applied to the respective filters. The applied voltages modify the response profile of the associated filters, where changes in the voltage applied to the SWP filter changes its cut-off wavelength λS and changes in the voltage applied to the LWP filter changes its cut-on wavelength λL (the bandwidth of the combined arrangement between the span between λL and λS). The ability to independently tune both the SWP and LWP filters allows for the combined result of their series combination to modify both the center wavelength (CWL) and bandwidth (BW) of the overall filter resulting from their combination.

The invention discloses a method for degrading tetracycline, and belongs to the technical field of organic wastewater treatment. According to the method, a nitrogen-doped carbon quantum dot-carbon nitride metal-free catalyst is adopted to activate persulfate under visible light to degrade tetracycline. According to the nitrogen-doped carbon quantum dot-carbon nitride metal-free catalyst, carbon nitride is taken as a carrier, and the carbon nitride is modified with nitrogen-doped carbon quantum dots. The metal-free catalyst disclosed by the invention has the advantages of strong light absorption capability, high photo-induced electron-hole separation efficiency, high catalytic activity, strong oxidation-reduction capability and the like. The catalyst is used for activating persulfate to degrade antibiotic wastewater under visible light, can catalyze persulfate to efficiently generate strong oxidizing free radicals, has the advantages of high degradation efficiency, good reusability, nosecondary pollution and wide application range, and has a very good practical application prospect.

The invention relates to a multifunctional wide-range ultra-short pulsed laser autocorrelator which comprises a precision mobile platform, a first right-angle reflector, a chopper, a second right-angle reflector, a parabolic mirror, a two-photon detector and a signal acquisition system, wherein the first right-angle reflector is fixed on the precision mobile platform and comprises two reflectors; the chopper is positioned at the front end of one reflector in the first right-angle reflector, a first light path is formed between the chopper and one reflector in the first right-angle reflector, and a first beam splitter is placed on the first light path; the second right-angle reflector comprises two reflectors, the second right-angle reflector is positioned at one side of the first light path, and a second light path is formed between the first beam splitter and one reflector in the second right-angle reflector; the parabolic mirror is positioned at the other side of the first light path, a third light path is formed between the parabolic mirror and the other reflector in the second right-angle reflector, a second beam splitter is placed on the third light path, and a fourth light path is formed between the second beam splitter and the other reflector in the first right-angle reflector; the two-photon detector is positioned at one side of the parabolic mirror; and the signal acquisition system is electrically connected with the two-photon detector.

The invention discloses a micro-spectrometer based on microelectronic mechanical system technology (MEMS). It contains fiber connector, entrance slit, reflector, blazed grating, focusing mirror and detector etc. Reflector is made by MEMS, whose surface can do cycle motion controlled by external signal. Blazed grating is dispersion element, together with reflector to form spectroscopic light path system. In design of light path, after leading by fiber connecter, tested optical signal is split by reflector and blazed grating to monochromatic light with special wavelength, which is converged into detector by focusing mirror. Depending on cycle motion of reflector surface, monochromatic light with various wavelength enter detector to complete spectrum scanning. The spectrometer based on MEMS has merits of small capacity, extensive spectrum range and low cost etc.

The optical fiber is composed of fiber core area, coating layer and external coating layer. Characters are that the fiber core area is air; coating layer is in araneose structure including alternant layers between single material and air in concentric circles as well as support bars distributed on section symmetrically. The invention uses araneose coating structure of single material to replace hollow core fiber of all directional medium reflectors composed of two media. Transmission characteristics between the fiber produced from single material and fiber prepared from two media. Advantages are: increasing realizability, extending varieties available to be produced, and spectral range possible to be transmitted.

The present invention relates to a projection exposure apparatus that forms predetermined patterns onto a substrate. The projection exposure apparatus for forming patterns onto a substrate, which includes a mask-stage for holding a photo-mask having predetermined patterns thereon, a light source for emitting a light ray containing spectral lines including g, h, i and j-lines, a wavelength selector for selecting a light ray containing predetermined spectral lines from the light ray emitted from the light source, an illumination optical system for irradiating the photo-mask with the selected light ray, an Offner type projection system for projecting the light having passed through the photo-mask onto the substrate, a substrate stage including a vacuum portion for holding the substrate, the substrate stage for positioning the substrate, and a light-shielding body for partially blocking the light irradiated to the substrate.

A polymer containing units of fluorene, anthracene and benzothiadiazole with the following formula is provided:2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolanyl)-9,9-dialkylfluorene, 9,10-dibromoanthracene or its or derivatives and 4,7-bis(5′-bromo-2′-thienyl)-2,1,3-benzothiadiazole or its derivatives are added to solvent, after the catalyst and base solution are added to the solution, the compounds in the solution are processed by Suzuki coupling reaction to obtain polymer. This kind of polymer containing units of fluorene, anthracene and benzothiadiazole have low energy gap, high mobility of the carriers, wide range of spectral absorption and have a broad prospect of application in the field of photoelectric.

The invention provides a single-pixel phase imaging method and a device based on amplitude modulation. The method comprises the steps of acquiring multiple amplitude modulation patterns; sequentiallyloading the amplitude modulation patterns to a spatial light modulator; sequentially projecting a preset modulated light source to a target object according to the amplitude modulation patterns by thespatial light modulator; sequentially acquiring corresponding multiple center light intensities of an optical fourier plane by a single-pixel detector after the amplitude modulation patterns are respectively projected to the target object; calculating the amplitude modulation patterns and the corresponding center light intensities according to an alternately projected phase recovery optimizationalgorithm; acquiring amplitude phase information of the target object; and determining an image of the target object according to the amplitude phase information. The single-pixel phase imaging methodhas the significant advantages of simple light path, high light efficiency, high robustness, high signal-to-noise ratio, wide spectral range, low cost, flexible system configuration and the like.

The invention discloses a spectrum magneto-optical ellipsometry analysis device of a rotary compensator as well as application thereof. The spectrum magneto-optical ellipsometry analysis device comprises a light source module, a light path module, a magnetic field module, a sample table, a motor control module and a detection and analysis module, the light path module comprises a collimating lens,a polarizer, a compensator and a polarization analyzer, the detection and analysis module comprises a computer and a detector, the collimating lens, the polarizer, the compensator, the sample table,the polarization analyzer and the detector are sequentially arranged along a light path direction, the polarizer and the compensator are located in an incidence light path, the polarization analyzer is located in an emergence light path, and the incidence light path and the emergence light path are located at the two sides of the sample table and respectively keep an included angle Phi with normalof the sample table. The device disclosed by the invention can represent optical and magnetic parameters of a magnetic film material under longitudinal or poloidal magneto-optical Kerr effect, can obtain thickness, optical parameters and magnetic parameters of a magnetic film sample during one test and is relatively high in automation degree.

The invention provides a high-refractive-index structure color fiber with the self assembly of ZnS nano balls and a preparation method of the high-refractive-index structure color fiber with the self assembly of the ZnS nano balls. The preparation method comprises the following steps: firstly, reacting zinc nitrate, thioacetamide and polyvinylpyrrolidone as starting materials for 1-10 hours to obtain the ZnS nano balls, wherein the temperature is controlled to be 60-100 DEG C; then according to the mass ratio of the ZnS nano balls to a dielectric solvent of 1:(20-200), dispersing the ZnS nano balls into the dielectric solvent to obtain a dispersion solution; and finally under the room temperature, carrying out lifting or electrophoretic deposition on a common high-molecular fiber or conductive fiber in the obtained dispersed solution by adopting a mode of lifting or electrophoretic deposition, so as to obtain the high-refractive-index structure color fiber with the self assembly of the ZnS nano balls, wherein the reflecting spectrum range is 400-640nm. The high-refractive-index structure color fiber provided by the invention has the excellent technical effects of wide spectrum range and high saturability and a photonic crystal fiber with complete band gaps can be obtained. The preparation method is environmentally-friendly without pollution and the large-scale production can be realized.

Chemical bath deposition (CBD) has proved top be the most favorable method for application of a buffer layer to semiconductor substrates, for example, chalcopyrite thin-film solar cells, whereby previously cadmium sulphide (CdS) was deposited and as cadmium is a highly toxic heavy metal, alternatives have been required. According to the invention, the semiconductor substrate is dipped in a solution for approximately 10 minutes, produced by the dissolution of zinc sulphate (0.05-0.5 mol / l) and thiourea (0.2 to 1.5 mol / l) in distilled water at a temperature being held essentially constant throughout said period. For the first time, the ZnS layer permits comparable or higher efficiencies than conventionally only achieved with toxic cadmium compounds. The method is hence much more environmentally-friendly with the same result.

A catadioptric optical system having a high numerical aperture operates in a wide spectral range. The catadioptric optical system includes a correcting plate, a first reflective surface and a second reflective surface. The correcting plate conditions electromagnetic radiation to correct at least one aberration. The first reflective surface is positioned to reflect the electromagnetic radiation conditioned by the correcting plate. The second reflective surface is positioned to focus the electromagnetic radiation reflected by the first reflective surface onto a target portion of a substrate. The electromagnetic radiation reflected by the first reflective surface and focused by the second reflective surface is not refracted by a refractive element, thereby enabling the catadioptric optical system to operate in a broad spectral range.

The invention discloses a metal substrate vertical GaN-based LED (Light-Emitting Diode) chip and a manufacturing method of the metal substrate vertical GaN-based LED chip. The LED chip is formed by compounding and depositing a metal substrate, an AlxGayIn1-x-yN buffer layer, an undoped AlxGayIn1-x-yN layer, an n-type doped AlxGayIn1-x-yN layer, an InxGa1-xN / GaN multi-quantum well (MQW) layer, a p-type AlxGa1-x-N layer, a p-type doped AlxGayIn1-x-yN layer, an n+ heavy doping type AlxGayIn1-x-yN layer and an indium tin oxide (ITO) layer, wherein an Ni / Au electrode layer is formed on the surface of the ITO layer. The method for manufacturing the metal substrate vertical GaN-based LED chip sequentially comprises the following steps of: arranging materials, performing plasma cleaning, performing nitrogen treatment, manufacturing a buffer layer, manufacturing an undoped layer, manufacturing an n-type doping layer, manufacturing a MQW layer, manufacturing a p-type doping layer, manufacturing a second p-type doping layer, and manufacturing an n+ heavy doping layer, the ITO layer and the electrode layer. The chip has the advantages of reasonable structure, wide spectrum range and the like, and the manufacturing method has the advantages of reasonable process, low temperature, environment friendliness, high quality of finished product, low manufacturing cost and the like.

The invention discloses a Mn<4+>-doped red light-emitting material and a preparation method thereof as well as a novel lighting source, and belongs to the field of a preparation method of fluorescent materials. The light-emitting material has a structural formula A[14-y]B6C[10-x]O35:xMn<4+>,yM<3+>, wherein in the formula, A represents one or two of alkaline-earth metal Ca, Sr or Ba; B represents one or two of Zn and Mg; C represents one or more of Al, Ga or In; M<3+> represents Sc, Y, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb or Lu; x is greater than or equal to 0.005 and less than or equal to 1; y is greater than or equal to 0 and less than or equal to 2. The invention further provides the preparation method of the Mn<4+>-doped red light-emitting material and the obtained novel lighting source. The Mn<4+>-doped red light-emitting material can be used for emitting red light in a wavelength range within 650nm to 750nm when being excited by excitation light sources such as ultraviolet light, near ultraviolet light or blue light.

A high resolution, wide spectral range, optical apparatus that includes an optical resonator cavity and a wavelength demultiplexer, arrangeable in multiple configurations. A method for increasing the resolution of a wavelength demultiplexer involves inputting light into an optical resonant cavity; inputting a plurality of different resonant output wavelengths to a wavelength demultiplexer; and routing each different resonant wavelength to a different output waveguide of the demultiplexer to generate a demultiplexer output spectrum. The method further involves performing either a time serialization or a space serialization procedure to increase the channel density and fully cover the spectrum of interest.

A combination of radio frequency energy responsive and infrared energy responsive reflection based plasma radiant energy steering apparatus usable in directing radiant energy originating in for example an antenna array or an infrared source in order to direct the energy to a point of use under conditions of low inertia electrical directing control. Plasma gas films of electrode element determined properties achieve reflection control of the radiant energy both with and without use of a discrete reflector element. Theoretical support and identification of prior art supporting documents are included in the disclosure.