79 results about "Monochromator" patented technology

The utility model discloses a self-calibration multi-grating monochromator. The self-calibration multi-grating monochromator comprises a self-calibration assembly, a grating spectrum system assembly and an optical receiver. The self-calibration assembly comprises a focus lens, a standard light source and a single-face reflector. And the standard light source is used for emitting a light beam with a specified wavelength to the single-sided reflector. And the single-sided reflector is used for reflecting the light beam to the focus lens, and the light beam is focused to the incident end of the grating spectrum system assembly through the focus lens. According to the utility model, an automatic calibration structure composed of the standard light source and the single-sided reflector is arranged at the incident end of the grating spectrum system assembly, so that the monochromator can emit a light beam with a specified wavelength through the standard light source when being used for a long time, and automatic calibration of the grating spectrum system assembly is realized in cooperation with the light receiver. Besides, the single-sided reflector is installed on the sliding rotary table, so that the single-sided reflector gives way when the grating spectrum system assembly is normally used, and interference with external light is avoided when the grating spectrum system assembly is normally used.

The invention discloses an in-situ ultraviolet and visible spectrophotometer with high measurement precision, and relates to the technical field of ultraviolet and visible spectrophotometers, the in-situ ultraviolet and visible spectrophotometer comprises a bottom shell, an optical unit is arranged on the inner wall of the bottom of the bottom shell, and a light source module and a monochromator are arranged in the optical unit; the top of the optical unit is fixedly connected with an operation platform through a supporting rod, the top of the operation platform is provided with a motor mounting frame, the top of the motor mounting frame is provided with a linear motor, the output end of the linear motor is connected with a lifting fixing plate, and the lifting fixing plate is of a Z-shaped structure. The end, away from the linear motor, of the lifting fixing plate is connected with a light shield, and the top of the light shield is provided with an optical fiber clamping frame. According to the method, result deviation caused by dilution multiple estimation errors in a traditional method is avoided, the dilution frequency of the high-concentration sample is reduced, reagent consumption and waste liquid generation are reduced, and the method conforms to the green analytical chemistry concept.

The present application relates to the technical fields of spectral analysis and substance detection, and discloses a deuterium lamp device and an atomic absorption spectral analysis method and system using the deuterium lamp. The system comprises a hollow cathode lamp unit, a built-in hollow cathode lamp emitting a first light beam after preheating under power supply; a first lens, a second lens and a third lens, a deuterium lamp device for emitting a second light beam at a first frequency under the driving of a pulse power supply; a sample cell for internally placing a sample to be measured in a combustion state; a monochromator for performing spectral processing on the incoming first light beam and / or the second light beam, and outputting the spectrally processed light signal to a photoelectric detector; the photoelectric detector for photoelectrically converting the light signal output by the monochromator to obtain an electric signal; and a data processing unit for analyzing and processing the electric signal of the photoelectric detector to obtain an analysis result. The present application can realize more accurate background deduction and improve the accuracy and reliability of atomic absorption spectral measurement.

The invention discloses a high-precision calibration method of a hyperspectral laser radar for photon counting, which belongs to the technical field of laser radars and comprises a spectrum calibration stage and a radiation calibration stage. Spectral calibration is used for extracting spectral response parameters of each channel based on wavelength-by-wavelength scanning of a monochromator and synchronous measurement of a beam splitter; a detection link is strictly decoupled through radiometric calibration, the effective attenuation coefficient of a water body is extracted in situ through a slope method, full-link radiation correction is carried out in combination with an air whiteboard reference and window transmittance, and the target intrinsic spectral reflectivity without interference is inverted. The method can be used for data correction, target accurate classification and identification and high-fidelity quantitative detection of the hyperspectral laser radar for photon counting, and solves the problem of serious spectral distortion of an original signal caused by non-uniform light source energy of the hyperspectral laser radar and complex scattering absorption of a water body.

The invention relates to the technical field of X-ray optics and spectral analysis, in particular to a multi-objective optimization design method and system for an X-ray fluorescence spectrum monochromator, and the main points of the technical scheme are as follows: S1, parameter and database input, S2, source spectrum generation and calibration, S3, monochromator dynamics solution, S4, multi-scheme comprehensive scoring and optimization selection, and S5, XRF forward modeling and system-level indexes. According to the method, an X-ray tube source parameter library is established to synthesize a real source spectrum containing a continuous spectrum and a characteristic line, an optimal design scheme is automatically searched in a multi-parameter space through a normalized weighted scoring system, and finally a simulated full spectrum is generated and system-level performance indexes are evaluated through an end-to-end'source-monochromatization-sample-detector 'forward modeling link. The problems that in a traditional design method, parameter coupling is complex, and model prediction deviation is large are solved, collaborative optimization of energy resolution, flux and purity is achieved, and technical support is provided for developing a high-performance XRF spectrograph.

The invention relates to the technical field of in-situ photoelectric characterization systems, and provides an in-situ photoelectric characterization system.The in-situ photoelectric characterization system comprises a sample table, a light path structure, a light source assembly, a light source analysis assembly and a source meter device, light is projected to the light path structure through the light source assembly, so that the source meter device can record and form an electrical characteristic curve; meanwhile, at least one of a near-infrared spectrometer, a visible spectrometer, a single-photon counter, a monochromator coupled with a near-infrared photomultiplier and a monochromator coupled with a visible photomultiplier in the light source analysis assembly can analyze and detect the product, so that the detection operation can be effectively optimized, and the detection efficiency is improved.

This invention relates to a method for assembling and adjusting a holographic concave grating monochromator, belonging to the field of optical instrument assembly and adjustment technology. It solves the problems of existing monochromator assembly and adjustment methods being cumbersome, time-consuming, labor-intensive, or having high theoretical requirements and low efficiency. The method involves leveling the holographic concave grating monochromator and laser; recording the initial spot height of the laser; directing the laser perpendicularly to the entrance slit of the monochromator to the center of the grating; measuring and recording the heights of the 0th and ±1st order diffraction spots; plotting the trajectories of the multi-order spectral spots; adjusting the pitch and / or tilt angle of the grating according to the trajectory until the center of each diffraction spot is collinear with the initial spot height; rotating the grating to allow the 0th order light to exit from the exit slit; using a right-angle fixture to adjust the grating shaft lever to be perpendicular to the drive screw and locking it; placing an external light source at the entrance slit; observing the clarity of the spectral lines at the exit slit using a microscope; and adjusting the thickness of the shim at the exit slit to achieve precise conjugate matching between the entrance and exit slits. This invention is simple to operate, quick to assemble and adjust, and highly accurate.

This invention discloses a two-dimensional infrared spectroscopy system and its detection method that combines acid-base step and pulsed heating. The system includes a femtosecond laser, an optical parametric amplifier and difference frequency generator, a frequency divider, an electronic time delay generator, a nanosecond laser, a detachable optical parametric oscillator providing 355nm light pulses, an optical parametric oscillator providing 2020nm light pulses, a monochromator and a mercury cadmium telluride array detector, an integrator and data acquisition card, a computer, a chopper, a time-resolved pulse generation chamber, and a sample chamber. This invention retains the original pulsed heating trigger mode by using a nanosecond light source with a detachable optical parametric oscillator providing 355nm light pulses. It achieves convenient switching between the acid-base step and pulsed heating modes through a dichroic mirror and a reversible reflector. Before and after switching, the propagation direction of the nanosecond pulses is completely consistent, and the relative time delay is corrected by the electronic time delay device.

The utility model discloses a manual ultraviolet monochromator assembly, which relates to the field of monochromators, and comprises a monochromator shell, the manual monochromator assembly used for adjusting monochromatic light is arranged behind the monochromator shell, the manual monochromator assembly comprises a manual wavelength knob, the top of the monochromator shell is fixedly connected with a lamp chamber shell, and the lamp chamber shell is fixedly connected with a light source. An automatic light searching assembly used for automatically searching light is arranged on the front face of the top of the lamp chamber shell. The automatic light searching assembly comprises a reflector motor body. A deuterium lamp holder is fixedly installed on the front face of the lamp chamber shell, and a deuterium lamp body is fixedly connected to the position, located in the monochromator shell, of the rear face of the deuterium lamp holder. By arranging the deuterium lamp body, the tungsten lamp body and the reflector motor body, automatic light searching and automatic light source switching of the ultraviolet monochromator can be achieved, the sun shield is arranged, unnecessary light can be shielded, the manual wavelength knob and the filter disc motor body are arranged, and wavelength can be manually and flexibly selected and accurately controlled.

Exemplary diagnostic systems and methods involve delivering multispectral light to a tissue of a patient, detecting light from the tissue, and analyzing the tissue based on the detected light. Light delivery can be achieved using a multi-dispersion element monochromator apparatus that includes a broad spectrum light source, a rotating body, and multiple dispersion elements in operative association with the rotating body.

A method of operating an electronic device that is configured to support manufacturing a semiconductor device includes (i) selecting a height of a stage of the electronic device that is configured to hold the semiconductor device, (ii) generating white light by using a light source of the electronic device, (iii) generating light of a selected wavelength by filtering the white light using a monochromater of the electronic device, (iv) emitting the light of the selected wavelength to the semiconductor device using a beam splitter of the electronic device, and (v) capturing reflection light reflected from the semiconductor device using a camera of the electronic device.

The invention relates to the technical field of optical measurement, and provides a large-aperture optical lens spectrum transmittance two-dimensional distribution test device and method, and the device comprises a light source module, and a monochromator module, a light beam modulation module, a test sample table and a detection module which are sequentially arranged along the light beam output direction of the light source module; the test sample table is a two-dimensional adjusting table, is used for arranging a tested optical lens, comprises a vertical optical axis direction horizontal translation device and an optical axis direction rotating device, and realizes two-dimensional position adjustment when the tested optical lens is measured; the detection module comprises a two-dimensional displacement table and a detector arranged on the two-dimensional displacement table, and the two-dimensional displacement table comprises a first translation device translating back and forth in the optical axis direction and a second translation device translating horizontally in the direction perpendicular to the optical axis. According to the invention, the positioning of the lens on a two-dimensional plane can be accurately controlled, and the test of the spectrum transmittance of different areas of the optical lens is realized.

The utility model discloses a liquid phase ultraviolet visible light detector, belongs to the technical field of liquid chromatography equipment, the liquid phase ultraviolet visible light detector comprises a case, a light source assembly, a thermal insulation layer and a monochromator assembly, the light source assembly is installed in the case, the monochromator assembly is installed at the opening of the side face of the light source assembly, and the thermal insulation layer is installed on the monochromator assembly. According to the utility model, by arranging the positions of the deuterium lamp and the tungsten lamp in the light source assembly, the orientation of the tail parts of the deuterium lamp and the tungsten lamp can be limited, the follow-up direction synchronization of the flow cell in the monochromator assembly is matched, and an operator opens the front door of the case, so that the deuterium lamp and the tungsten lamp can be conveniently operated. The tungsten lamp, the deuterium lamp and the flow cell can be clearly and visually observed, subsequent rapid replacement and maintenance are facilitated, the whole part shell does not need to be disassembled, the influence of the external temperature on equipment operation can be stably reduced in cooperation with a heat preservation layer, a temperature control fan and an air duct, and the overall accuracy of the equipment is improved.

The application relates to the technical field of spectral calibration, in particular to a spectral calibration method and device of a single-lens imaging spectral system. Step 100: according to the focal length of the single lens, the distance between the single lens and the detector is adjusted, the monochromator is controlled to be turned on, and the wavelength is initialized; step 102: the two-dimensional displacement platform is controlled to move according to a preset distance, so as to record each acquisition position of the detector and the corresponding number; step 104: the gray-scale map data collected by the detector is fitted, so that the maximum value position of the spectral line and the corresponding number are obtained; step 106: the initialized wavelength is adjusted according to a preset increment; step 108: steps 100 to 106 are circularly executed, so that the position number of the maximum value of the spectral line under different wavelength conditions is obtained; and step 110: the spectral calibration position is determined based on the position number of the maximum value of the spectral line under different wavelength conditions. In this way, the calibration of the spectral center wavelength can be accurately and efficiently completed.

The invention relates to a multi-source disturbance self-calibration method and system for a rotary filtering type monochromator, and belongs to the technical field of optical instrument filtering calibration. The method comprises the following steps: converting a multi-source disturbance signal response characteristic into a disturbance energy spectrum basis vector, and extracting spectrum bandwidth distribution to obtain a spectrum self-disturbance calibration parameter; luminous flux preposition constraint is carried out, the convergence state of a real-time spectrum observation value under the disturbance change condition is detected, confidence coefficient calibration is carried out on the disturbance contribution weight on which the self-calibration operation depends, and a filtering disturbance compensation control strategy is generated; constructing a filtering performance evolution model, identifying spectral wavelength shift and resolution data after disturbance self-calibration, verifying the filtering degradation period of the monochromator, and outputting a filtering calibration feedback report; and setting a critical interference stable threshold, establishing a filtering virtual regulation and control mechanism, enhancing the compensation calibration weight of a filtering disturbance compensation control strategy, and generating a filtering disturbance self-calibration scheme.

The invention provides a double-grating monochromator, a double-grating monochromatization method, a double-grating monochromatization device, a medium and equipment, a first optical system comprises a first plane line-distance-variable grating and an incident plane mirror, a monochromatic light slit is arranged at the image plane position of the first optical system, a second optical system comprises an emergent plane mirror and a second plane line-distance-variable grating, and a monochromatic light slit is arranged at the image plane position of the second optical system. The second plane variable-line-distance grating and the first plane variable-line-distance grating are matched in parameter and are symmetrically arranged, so that the forward inclination of the pulse introduced by the first plane variable-line-distance grating is counteracted by the opposite dispersion effect generated by the second plane variable-line-distance grating; wherein the incident plane mirror and the emergent plane mirror respectively adjust the angle of an incident light beam at a fixed spatial distance in an off-axis rotation mode, and the angle adjustment and the scanning angle of the corresponding grating are cooperatively changed so as to maintain a constant grating equation relationship. And the output pulse width is remarkably compressed, and collaborative optimization of high energy resolution and optimal pulse output is realized.

A blood glucose level measuring apparatus includes: a light source configured to irradiate light to a subject; a monochromatic section configured to separate wavelength components of light reflected and scattered from an object; a light receiver configured to receive light transmitted through the monochromator portion and generate an electrical signal based on the received light; and a processor configured to extract information of a blood glucose level of the subject based on a frequency shift of the light due to the Raman effect.

The invention discloses a spectrum calibration method, device, equipment and system for a monochromator, and the method comprises the steps: controlling a first diaphragm and a second diaphragm to move reversely on a focal plane of a first-stage light path along a first direction perpendicular to an optical axis until a first distance exists between the first diaphragm and the second diaphragm; the first diaphragm and the second diaphragm are controlled to be kept relatively static, the whole diaphragm moves in the first direction, and meanwhile first spectral information in the moving process is collected; determining a reference spectrum according to the first spectrum information; the first diaphragm and the second diaphragm are controlled to be kept relatively static at different preset intervals in sequence, the whole diaphragm moves in the first direction, and meanwhile second spectral information in the moving process is collected; and according to the comparison result of the second spectrum information and the reference spectrum, determining the corresponding relationship between the positions of the first diaphragm and the second diaphragm and the wavelength and the bandwidth. An additional calibration light source and any hardware operation are not needed, the monochromator can work in a closed environment for a long time, and high-precision automatic calibration can be achieved.

Apparatus for examining a liquid or powdered sample (140) by means of ultrasmall angle X-ray scattering, comprising: a beam shaping device (120) comprising an elliptical mirror (120), a monochromator (130), an analyzer (150), and a detector (160) for X-ray radiation, wherein the monochromator (130) is arranged between the beam shaping device (120) and the analyzer (150) and wherein the beam shaping device (120) is configured to focus an X-ray beam (115) in front of the monochromator (130); wherein the liquid or powdered sample (140) is arranged between the monochromator (130) and the analyzer (150), wherein a focus of the elliptical mirror (120) is directed towards the monochromator (130).

The invention discloses a monochromator system based on a transmission grating, which comprises a monochromator chamber, two ends of the interior of the monochromator chamber are respectively provided with a slit entering frame and a grating adjusting frame, a mirror bracket is arranged between the slit entering frame and the grating adjusting frame, a focusing toroidal mirror is arranged on the mirror bracket, and the transmission grating is arranged on the grating adjusting frame. An extension rod is arranged at the front end of the monochromator chamber, and a light source is arranged at the end of the extension rod. The device has the advantages that under the condition that the solid angle of the transmission grating is not changed, the incidence angle of the grating is changed through the rotation angle of the grating adjusting frame, light with different wavelengths is output at the same angle after being focused, it is guaranteed that the focused light can be output through the fixed outlet seam, and the device is compact in structure, low in cost and convenient to use. Precise diffraction and stable focusing of soft X-rays can be achieved, and the method is applied to a laser plasma light source and meets the application requirement of the ultra-fast soft X-ray absorption spectrum technology.

The application discloses an ultrathin diamond clamping device, which comprises, from top to bottom, a graphite pressing block, a polycrystalline diamond limiting sheet, a polycrystalline diamond bottom sheet, a graphite bottom plate and graphite screws for fixing the above-mentioned elements; the polycrystalline diamond limiting sheet is provided with at least one rectangular notch, and the limiting groove for positioning the ultrathin diamond crystal sheet is formed by the rectangular notch and the polycrystalline diamond bottom sheet; the graphite pressing block covers the ultrathin diamond crystal sheet, the graphite screws pass through the graphite pressing block, the polycrystalline diamond limiting sheet and the polycrystalline diamond bottom sheet in sequence and are connected with the graphite bottom plate, the graphite pressing block is extruded by twisting the graphite screws, pressure is applied to the ultrathin diamond crystal sheet to realize clamping. According to the application, the ultrathin diamond clamping device has the advantages of low thermal load, small clamping stress, small radiation damage and the like, reliably supports the stable and efficient generation of the seed laser by the monochromator, and finally helps to realize the high-stability operation of the fully-coherent free electron laser.

The invention discloses an LIBS (Laser-induced Breakdown Spectroscopy) rapid quantitative detection method for a cadmium element in a water body based on a metal organic framework material, and belongs to the technical field of water body detection.The LIBS rapid quantitative detection method comprises the steps that cadmium element solutions with different concentration gradients are obtained; the preparation method comprises the following steps: combining a metal organic framework material MIL-125-NH2 with a polytetrafluoroethylene filter membrane; the method comprises the following steps: adsorbing a cadmium element solution by using an MIL-125-NH2-PTFE membrane as an adsorption substrate, and taking the cadmium element solution as a sample to be detected; debugging the laser-induced breakdown spectrometer and acquiring optimal acquisition parameters, and acquiring spectral data of the sample by using a monochromator; rapidly positioning n emission spectral lines of the cadmium element from the spectral data, and recording the spectral lines; establishing a linear regression model of cadmium element emission spectral line signal intensity and cadmium concentration; and obtaining an optimal model. The method solves the problem that the existing water body cadmium element is difficult to rapidly and quantitatively detect. According to the invention, rapid and accurate quantitative detection of the cadmium element in the water body is realized.

This invention relates to the field of synchrotron radiation optical elements and discloses an X-ray monochromator device and an adjustment method for the X-ray monochromator device. The device includes: a base assembly; a spectroscopic crystal assembly, including a single-crystal crystal plate and two flexible connectors, the single-crystal crystal plate having a front and a back, the front being configured to face the X-ray incident direction, and the two flexible connectors symmetrically arranged on one side of the back of the single-crystal crystal plate and connecting the single-crystal crystal plate and the base assembly; a deformation detection element, which monitors the curvature change of the single-crystal crystal plate in real time and generates a feedback signal; and a loading mechanism, including at least two force-applying parts, at least two force-applying parts disposed between the two flexible connectors, at least two force-applying parts acting on the back, and the loading mechanism being able to control the at least two force-applying parts to act on the single-crystal crystal plate according to the feedback signal. This invention operates entirely at room temperature, and can achieve continuously adjustable curvature of the single-crystal crystal plate, no thermally induced lattice damage, and high energy resolution.

1. The name of the design product: double crystal monochromator (single station). 2. The use of the design product: for monochromatizing continuous synchrotron radiation. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The present disclosure relates to the technical field of material detection, and in particular to a fiber texture determination method and system based on polychromatic X-ray diffraction. The method comprises: controlling the orientation of a sample under test, so that a polychromatic X-ray irradiates said sample in a direction perpendicular to the fiber axis of said sample; acquiring a first diffraction signal generated after the polychromatic X-ray irradiates said sample; and processing the first diffraction signal to obtain internal fiber texture information of said sample. In the present disclosure, by using an X-ray diffraction technique and a conventional laboratory polychromatic X-ray source, rapid and quantitative detection of the internal fiber texture of a sample under test can be achieved under a polychromatic X-ray condition without requiring an X-ray monochromator.

The atomic absorption double-light-path device comprises a light source, a monochromator and a light splitting device, the light splitting device achieves light path separation and modulation through an efficient light pick-up head, a light splitting optical fiber, a condensing lens, a light chopper and a converging optical fiber, light of the light source is divided into a sample light path and a reference light path, and the sample light path and the reference light path are transmitted into the monochromator; meanwhile, the sample light path sensitivity is improved through the atomizer. The optical path stability and the detection precision are improved, background light interference is effectively eliminated, multi-optical-path time sequence adjustment is realized, and the accuracy and the reliability of atomic absorption analysis are remarkably improved.

The invention discloses temperature-sensitive fluorescent coating ink based on triplet state-triplet state annihilation up-conversion as well as a preparation method and application of the temperature-sensitive fluorescent coating ink. The ink is composed of a polymer substrate material, silicone rubber polymer nanoparticles loaded with triplet state-triplet state annihilation up-conversion fluorescent dye and a solvent, a temperature-sensitive fluorescent coating is formed on the surface of an electronic component through a dispensing method, a spin coating method, a blade coating method or a spraying method, and a uniform fluorescent film is prepared; exciting the fluorescent film by using laser; a photoluminescence signal is collected through a confocal light path, and spectrum analysis is carried out through a monochromator; the method comprises the following steps: performing micro-area scanning on a fluorescent film on the surface of a measured object by controlling a displacement table or a galvanometer, and capturing spectral information of each pixel point; and according to a pre-calibrated temperature-spectrum relation curve, reconstructing a micro-scale two-dimensional or three-dimensional temperature distribution diagram of the chip in a working state. According to the invention, non-contact and high-resolution real-time temperature imaging of a chip working state microcell is realized, and a key technology is provided for temperature anomaly detection, thermal management optimization and failure analysis of a miniature electronic component.

The invention provides a crystal assembly and a monochromator. The crystal assembly comprises a first crystal, a first cooling block, a second cooling block, a clamping assembly and a cooling pipeline. The first cooling block and the second cooling block are arranged at the two ends of the first crystal respectively in the first direction. The clamping assembly comprises a first pressing plate and a second pressing plate, the first pressing plate is arranged on the side, away from the first crystal, of the first cooling block, and the second pressing plate is arranged on the side, away from the first crystal, of the second cooling block. The cooling pipeline comprises a first pipeline, at least one part of the first pipeline is arranged between the first cooling block and the first pressing plate, and / or at least one part of the first pipeline is arranged between the second cooling block and the second pressing plate. Wherein the first pipeline comprises at least three sub-pipelines, the at least three sub-pipelines are arranged at intervals along the second direction, and the second direction intersects with the first direction, so that the heat exchange efficiency is remarkably improved, the temperature gradient is reduced, the heat dissipation capability on the first crystal is improved, and the thermal deformation of the first crystal is effectively reduced.

The application belongs to the field of polarized light source, and particularly relates to a portable automatic wavelength-adjustable polarized light beam generating system, which comprises a wide-spectrum light source, a monochromator, a polarization module and an automatic control module, wherein the automatic control module is connected with the wide-spectrum light source, the monochromator and the polarization module through data transmission lines, and the monochromator and the polarization module are arranged on the light path of the wide-spectrum light source in sequence. The application provides a portable automatic wavelength-adjustable polarized light source which can output a specified wavelength and specified polarization light beam, and greatly simplifies the manual adjustment for obtaining the specified wavelength and specified polarization light beam in the current experimental process, thereby improving the experimental efficiency.