214results about "Investigating crystals" patented technology

An optical measuring apparatus used for measuring optical characteristics of a liquid crystal display panel (LCD panel) in a calibration thereof comprises a housing having a contacting portion directly contacting a surface of the LCD panel and disposed far from a region on the LCD panel to be measured. An optical system and a photosensor is provided in the housing with a predetermined positional relation, so that ambient illumination is shielded by the housing and stray rays emitted from the LCD panel and having exit angles larger than a predetermined maximum exit angle alpha are restricted by the optical system.

A method is disclosed evaluating a silicon layer crystallized by irradiation with pulses form an excimer-laser. The crystallization produces periodic features on the crystalized layer dependent on the number of and energy density in the pulses to which the layer has been exposed. An area of the layer is illuminated with light. A detector is arranged to detect light diffracted from the illuminated area and to determine from the detected diffracted light the energy density in the pulses to which the layer has been exposed.

A method is disclosed evaluating a silicon layer crystallized by irradiation with pulses form an excimer-laser. The crystallization produces periodic features on the crystalized layer dependent on the number of and energy density ED in the pulses to which the layer has been exposed. An area of the layer is illuminated with light. A microscope image of the illuminated area is made from light diffracted from the illuminated are by the periodic features. The microscope image includes corresponding periodic features. The ED is determined from a measure of the contrast of the periodic features in the microscope image.

The present invention provides a method of and a device for measuring the stress in a semiconductor material. An excitation light is irradiated on a semiconductor material formed with a silicon germanium layer and a strained silicon layer in a multilayer structure on a single crystal silicon substrate from the direction of the strained silicon layer. An internal stress of the semiconductor material is measured from peak position information of the Raman spectrum of scattered light from the irradiating point, wherein light having a wavelength capable of reaching the single crystal silicon substrate is used as the excitation light, a temperature of the semiconductor material is estimated from a shift amount of the peak position of the Raman spectrum of the scattered light from the substrate in accordance with the irradiation of the excitation light and the shift amounts of the peak positions of the Raman spectra in the strained silicon layer and in the silicon germanium layer are corrected by means of the estimated temperature, The internal stresses of the strained silicon layer and the silicon germanium layer are calculated from the corrected peak position information of the Raman spectra in the respective layers.

The invention relates to a corrosive for displaying heat-resistant steel original austenite grain-boundary and a displaying method thereof, belongs to the technical field of gold-phase sample preparation, and solves the problems of unclear display and complicated displaying method for heat-resistant steel original austenite grain-boundary. The corrosive is prepared from potassium permanganate, concentrated sulfuric acid and distilled water. The displaying method comprises the following steps: S1, preparing, grinding and polishing a sample; S2, preparing corrosive and performing chemical corrosion; and S3, observing the original austenite grain-boundary. The corrosive can quickly and easily display the original austenite grain-boundary of heat-resistant steel and determine the performance by analyzing and determining whether the original austenite grain-boundary has thick grains or not, and provides important accordance to constitution of the production process.

A method of in-situ monitoring of a crystallization state is used for laser anneal processing for applying an energy line irradiation for at least one of crystallization of a thin film and promotion of the crystallization. The method of in-situ monitoring of a crystallization state is characterized by irradiating simultaneously at least a plurality of monitoring places in a region having a predetermined area of at least one of the surface and the underside of the thin film by a monitor light for monitoring a crystallization state of the thin film at least during or after of before, during and after the energy line irradiation directly or through a substrate, and measuring a temporal change of the intensity of at least one of a reflected light and a transmitted light, from the surface or the underside of the thin film, of the monitor light as a light intensity distribution related to the positions of the monitoring places.

The present invention provides a novel approach for reliably and accurately detecting and identifying airborne particles. This is done by providing a novel system which incorporates electrostatic concentrators and/or ion mobility separators with Raman, IR, UV, XRF, LIF and LIBS spectroscopy and/or other spectroscopic techniques.

The invention discloses a method for displaying the original austenite grain boundary of 85Cr2MnMo liner steel. The method comprises the following steps: (1) sample preparation; (2) determination of phase transition temperature, wherein Accm (complete dissolution of cementite and carbide into austenite) temperature of the 85Cr2MnMo liner steel is 835 DEG C according to results of thermal expansion measurement; (3) quenching: heating a sample to 860 to 920 DEG C, maintaining the temperature for 60 min and then rapidly quenching the sample in machine oil No. 10; and (4) corrosion: mixing 100 ml of deionized water, 4 g of picric acid, 2 g of Aiou shampoo paste and 0.1 g of CuCl2.2H2O to prepare a corrosive agent, putting the corrosive agent in a water-bath pot with a temperature of 55 to 60 DEG C for heat preservation, putting the quenched, ground and polished sample in the corrosive agent for corrosion for 50 to 60 s, taking the sample out, wiping the sample with absorbent cotton dipped with alcohol so as to remove reaction products on the surface of the sample, cleaning the sample through flushing and then subjecting the sample to blow-drying. As the sample is observed with an optical microscope, the original austenite grain boundary of 85Cr2MnMo liner steel can be clearly displayed and matrix structure is not displayed, so bases are provided for accurate rating of the grain size of austenite.

A method for non-invasively probing at least one physics property of a solid material. In one embodiment, the method has the steps of splitting a photon beam into a first photon beam and a second photon beam, exposing the solid material to the first photon beam to generate a coherent acoustic phonon wave in the solid material at time t, and exposing the solid material to the second photon beam at a time t+Δt, where t+Δt≧t, to generate corresponding second harmonic generation signals, where from the corresponding second harmonic generation signals, the at least one physics property of the solid material is determinable.

In an inspection system for planar objects having periodic structures, programmable optical Fourier filtering in the focal plane of a telecentric lens system is used to directly identify physical phenomena indicative of non-periodic defects. Lens assemblies and a coherent optical source are used to generate and observe a spatial Fourier transform of a periodic structure in the Fourier plane. Optical Fourier filtering (OFF) is performed in the focal plane using an electrically programmable and electrically alignable spatial light modulator. The spatial light modulator with high signal to noise ratio is electrically reconfigurable according to a feedback-driven, filter construction and alignment algorithm. The OFF enhances any non-periodic components present in the Fourier plane and final image plane of the object. A system having a plurality of inspection channels provides high-throughput inspection of objects with small non-periodic defects while maintaining high detection sensitivity.

The invention discloses a photo-thermal common-path interference module which is applied to a crystal defect measurement instrument. The crystal defect measurement instrument based on a module is characterized in that pump laser and detection laser are focused at the same point of a sample to test a dynamical mesoscopic defect of the sample; a dynamic defect three-dimensional distribution map of the sample is obtained through movement of the sample. The photo-thermal common-path interference module disclosed by the invention comprises a pumping light source, a detection light source, a converging light path, a sample frame, a measurement light path, a laser power meter, and a wave-front detector, wherein a test point is heated through the pump laser; remaining laser is received by the laser power meter; the detection laser passes through the heated test point; interference is changed in front of waves according to the temperature distribution of the test point; weak laser passing through the sample passes through the measurement light path, and is irradiated into the wave-front detector; changed wave-front information is measured, and the heating condition and absorption capacity of an irradiation point are obtained through comparative calculation.

A method of determining the crystalline orientation of a crystal surface of a workpiece using Raman spectroscopy. A beam of substantially monochromatic light is directed to be incident on the crystal surface at a predetermined angle of incidence. The beam of light is substantially polarized. The workpiece is rotated relative to the beam of light about a rotation axis substantially normal to the crystal surface. A Raman shift of scattered light is measured at each of a number of rotational positions during the rotation of the workpiece. The crystalline orientation of the crystal surface is determined based on the measured Raman shifts. Data indicating the determined crystalline orientation of the crystal surface is stored.

The invention belongs to the technical field of quantitative statistical distribution analysis for micro-structures of metal materials, and relates to a method for automatic quantitative statistical distribution characterization of dendrite structures in a full view field of metal materials. According to the method based on deep learning in the present invention, dendrite structure feature maps are marked and trained to obtain a corresponding object detection model, so as to carry out automatic identification and marking of dendrite structure centers in a full view field; and in combination with an image processing method, feature parameters in the full view field such as morphology, position, number and spacing of all dendrite structures within a large range are obtained quickly, thereby achieving quantitative statistical distribution characterization of dendrite structures in the metal material. The method is accurate, automatic and efficient, involves a large amount of quantitative statistical distribution information, and is statistically more representative as compared with the traditional measurement of feature sizes of dendrite structures in a single view field.

The present invention provides an evaluation method for a crystal defect in a silicon single crystal wafer based on an infrared laser scattering tomograph method, wherein at least, the silicon single crystal wafer is irradiated with a laser beam, and light that enters the silicon single crystal wafer is scattered by a crystal defect, and the scattered light is detected to evaluate a Direct Surface Oxide Defect (DSOD) and a void defect smaller than the DSOD in the silicon single crystal wafer. As a result, the evaluation method for a crystal defect in a silicon single crystal wafer that can simply and precisely evaluate, e.g., a small DSOD, which can be conventionally evaluated based on a Cu deposition method alone, without requiring a wasteful cost.

The invention discloses an ultrahigh-flux platform for screening crystal generation conditions and a screening method. The platform comprises a micro-fluidic droplet chip, a micro-droplet collection chip and a characterization-analysis system, wherein the micro-fluidic droplet chip is used for generating crystallized droplets at ultrahigh flux; the micro-droplet collection chip is used for collecting the crystallized droplets generated by the micro-fluidic droplet chip; and after the micro-droplet collection chip collects the crystallized droplets, the characterization-analysis system characterizes and identifies the morphology of crystals in the crystallized droplets, and analyzes and screens out crystallization conditions corresponding to the optimal crystal morphology according to the characterized and identified morphology of the crystals. The ultrahigh-flux platform provided by the invention provides a good solution for rapid screening of crystal generation conditions. The screening method for screening the crystal generation conditions provided by the invention is based on the ultrahigh-flux platform, can quickly screen out excellent and stable crystallization conditions, andis convenient and accurate.

A method of detecting a covert marking including applying a fluorescent ink to a dendritic structure to generate an ink-coated dendrite and imaging the ink-coated dendrite with a device to visualize the ink-coated dendrite. A method of detecting a covert marking on an object including applying UV light to an object including a dendritic structure and illuminating the dendritic structure with the UV light. A dendritic structure including a unique metallic structure at least partially coated with a fluorescent ink that is not visible to the naked eye in ambient light and is visible to the naked eye when exposed to UV light.

The invention relates to a visualization device and method for multidirectional observation of hydrate generation and decomposition. The visualization device comprises a low-temperature constant-temperature control system, a normal-pressure visualization reaction device, a temperature acquisition apparatus and a CCD imaging system, wherein the normal-pressure visualization reaction device comprises a temperature control circulating tank, a reaction tank, a circulating liquid inlet and a circulating liquid outlet; the reaction tank is arranged in the temperature control circulating tank; the tank wall of the temperature control circulating tank is communicated with the circulating liquid inlet and the circulating liquid outlet; a two-layer organic glass window is arranged on one side tank wall of the reaction tank, and comprises an observation window and an organic glass window in turn from inside to outside; the observation window and the organic glass window are both made of organic glass. According to the visualization device and method provided by the invention, the two-layer organic glass window is adopted, and is totally closed inside, air is dry, and the heat conductivity is low; the temperature of the outer-layer organic glass is close to room temperature, and the problem of water mist is solved.

The invention provides a prediction method and device for continuous casting center segregation. The method comprise: obtaining continuous casting billet image information, and inputting the continuous casting billet image information into a training model, wherein the training model is obtained by training multiple sets of training data, and each set of training data comprises the continuous casting billet image information and a label for recognizing billet process information on the continuous casting billet image information; obtaining output information of the training model, wherein theoutput information comprises billet process information corresponding to the continuous casting billet image information; and according to the billet process information corresponding to the continuous casting billet image information and the standard continuous casting billet process threshold, obtaining billet prediction information, and predicting whether the billet corresponding to the continuous casting billet image is subjected to center segregation. The technical problems that in the prior art, a casual inspection mode is adopted, judgment cannot be conducted one by one, and center segregation of continuous casting billets cannot be predicted in advance are solved. The technical effects that intelligent data processing is conducted on all steel billets in the continuous casting equipment, the risk of center segregation is predicted in time, the accuracy is high, and the quality of the steel billets is improved are achieved.