46 results about "Photometer" patented technology

This invention relates to the field of building materials technology, and particularly to a method for determining and evaluating the performance of ethylene-vinyl acetate redispersible latex powder in reconstitution into an emulsion. The method includes the following steps: dissolving ethylene-vinyl acetate redispersible latex powder in water to prepare a latex powder solution of a certain concentration; allowing the latex powder solution to stand for a period of time, then placing it in an ultraviolet spectrophotometer to measure the transmittance, plotting transmittance curves after different standing times, and obtaining the transmittance value of the ethylene-vinyl acetate redispersible latex powder; combining the transmittance curve trend and transmittance value, evaluating the performance of the ethylene-vinyl acetate redispersible latex powder in reconstitution into an emulsion, and providing corresponding application suggestions. The method of this invention is convenient to operate, highly practical, produces stable test results, and has good reproducibility, serving as a reference for the quality evaluation of redispersible latex powder in mortar applications.

The application discloses a light transmittance test assembly for a polishing pad window and a test device. The test device can comprise a base; and a mount detachably and slidably connected to the base; wherein the mount has a notch part on a solid part, the notch part extends a first slot towards the solid part, and a polishing pad window is at least partially in the notch part after being installed in the first slot. The light transmittance test assembly for the polishing pad window has a mount matched with the polishing pad window, can be directly applied to a spectrophotometer, and improves the measurement accuracy and the measurement convenience.

The present application relates to the field of probiotic activity detection, in particular to a reagent device for rapid detection of probiotic activity and equipment, comprising a shaking cup and a shaking device; the reagent device further comprises: a separation ring coaxially arranged in the shaking cup along the axis of the shaking cup, the diameter of the separation ring is the same as the diameter of the shaking cup, and the separation ring is made of a deformable material; a sampling device arranged at the upper part of the shaking cup; a storage cup arranged in a straight line with the shaking cup, and a plurality of storage cups are used to store reagents and probiotic samples respectively; a first linear driver for driving the sampling device to reciprocate along the arrangement direction of the storage cup; and an ultraviolet spectrophotometer arranged on one side of the storage cup and located on the moving path of the sampling device. The present application avoids the scattering and shielding interference of foam on the light path, and improves the reliability of the data.

The utility model relates to clothing detection technical field, and disclose a kind of clothing anti-UV performance detection light shield structure, including side plate, further include: placing plate, rotating connection on side plate by hinge, the detection cover that the clothing exposure is irradiated by ultraviolet on placing plate is installed;The utility model utilizes pressing plate and limits clothing to be pressed flat, and the anti-UV performance detection processing of clothing can be handled using detection equipment by detection cover, side plate and placing plate effectively block other light source (such as illuminating lamp, natural light etc.), avoid them and ultraviolet light source superposition, lead to detection equipment (such as ultraviolet spectrophotometer) reading inaccuracy, and can block the ultraviolet that has not been absorbed by clothing, avoid its direct irradiation to detection equipment or laboratory other area, reduce the risk of equipment due to long-term exposure to ultraviolet and ageing.

This invention relates to the field of spectrophotometer calibration technology, and more particularly to a calibration system and method for a UV-Vis spectrophotometer. The system includes an acquisition module, a judgment module, an identification module, a correction module, and an early warning module. This invention constructs surface cleanliness and light-dust correlation indices by analyzing light source intensity attenuation and stray light, and explores the coupling characteristics between backlash and drift with surface cleanliness. It distinguishes anomaly types and adjusts the gain compensation coefficient accordingly to compensate for light intensity attenuation, or adjusts the mechanical wear compensation step size to correct positioning errors. Simultaneously, it continuously tracks the dynamic changes of the correction efficiency index, continuously optimizes relevant preset parameters, and issues timely warnings when the compensation efficiency continues to decline. This invention effectively solves the problems of a single compensation strategy and difficulty in timely warnings of parameter mismatch caused by the inability to differentiate compensation based on the degree of dust intrusion and the lack of self-optimization capabilities due to fixed compensation parameters.

1. The name of the design product: light spot analyzer (thin). 2. The use of the design product: the design product is used for analyzing laser light spot. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

This invention relates to the field of photosensitivity correction technology, and provides a method and system for photosensitivity correction based on dynamic temperature difference compensation. The method includes: in an experimental environment, weighted summation of temperature difference compensation coefficient, distance compensation coefficient, and wavelength compensation coefficient to obtain a comprehensive compensation coefficient; calculating the product of the photosensitivity acquisition value and the comprehensive compensation coefficient to obtain the compensated target photosensitivity value, and performing photoelectric conversion error correction and signal amplification noise filtering to obtain the corrected photosensitivity value; calculating the deviation from the standard photometer data; adjusting the weights according to the deviation using a gradient descent method until the deviation reaches the target, forming a weight lookup table for different temperature values, measurement distances, and illumination wavelengths; in practical applications, determining the weights based on the weight lookup table, and weighted summation of the temperature difference compensation coefficient, distance compensation coefficient, and wavelength compensation coefficient to obtain the comprehensive compensation coefficient, which is used to compensate and correct the photosensitivity acquisition value. The compensation accuracy is significantly improved.

1. Name of the product in this design: Photometer (HX-8). 2. Purpose of this design: This design is used to measure the intensity of light or radiant energy. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the key design points: Design 1 3D view. 5. Design 1 is designated as the basic design.

This invention describes a high-transmittance light-controlling film comprising alternating transmissive and absorptive regions disposed between a light input surface and a light output surface. The absorptive regions have an aspect ratio of at least 30. In some embodiments, the alternating transmissive and absorptive regions have transmittance measured at a 0-degree viewing angle by a spectrophotometer for wavelengths in the 320 nm–400 nm (UV) range, at least 35%, 40%, 45%, or 50%, and / or transmittance measured at a 0-degree viewing angle for wavelengths in the 700 nm–1400 nm (NIR) range. In another embodiment, the absorptive regions block light at the light input and light output surfaces, and the maximum blocked surface area is less than 20% of the total alternating transmissive and absorptive regions. Various optical communication systems and methods incorporating the light-controlling film described herein are also described.

The utility model discloses a kind of ultramicro spectrophotometer cuvette detection structure, including operation platform, the rotating seat on the top of operation platform is rotatably connected with flip cover, main road optical fiber is equipped on the operation platform, the bottom of operation platform is also installed with cuvette placing box.The utility model passes through adopting double optical path design, pedestal and cuvette light path are independent, integrated design, without physical replacement spare part, by software selection "pedestal" or "cuvette card slot" mode, can effectively avoid cross contamination, when cuvette detection, directly cuvette is placed in the fixed slot beside pedestal, light path passes through incident optical fiber, aligns cuvette light transmission hole, the utility model structure is simple, without complex light path switching system, effectively solve the positioning problem and light energy loss problem of physical switching, improve the range of measurement, accuracy and reliability of equipment, convenient operation, convenient to carry, with higher practical value.

This invention relates to the field of photosensitivity correction technology, and provides a method and system for photosensitivity correction based on dynamic temperature difference compensation. The method includes: in an experimental environment, weighted summation of temperature difference compensation coefficient, distance compensation coefficient, and wavelength compensation coefficient to obtain a comprehensive compensation coefficient; calculating the product of the photosensitivity acquisition value and the comprehensive compensation coefficient to obtain the compensated target photosensitivity value, and performing photoelectric conversion error correction and signal amplification noise filtering to obtain the corrected photosensitivity value; calculating the deviation from the standard photometer data; adjusting the weights according to the deviation using a gradient descent method until the deviation reaches the target, forming a weight lookup table for different temperature values, measurement distances, and illumination wavelengths; in practical applications, determining the weights based on the weight lookup table, and weighted summation of the temperature difference compensation coefficient, distance compensation coefficient, and wavelength compensation coefficient to obtain the comprehensive compensation coefficient, which is used to compensate and correct the photosensitivity acquisition value. The compensation accuracy is significantly improved.

The application discloses a research method for interaction between a new pollutant and DNA, and the method comprises the following steps: using a DFT method in quantum chemistry calculation software to optimize the molecular structure of the new pollutant and deoxy nucleoside; using Multiwfn software to obtain the contribution of each atom to a molecular orbital and atomic charge distribution; finding an electrophilic site of the new pollutant and a nucleophilic site of the deoxy nucleoside; using molecular docking software to perform docking calculation on the new pollutant and a double-stranded DNA fragment and search for an optimal combination position; using a UV-Vis ultraviolet spectrophotometer to perform ultraviolet spectrum titration on the interaction between the new pollutant and the double-stranded DNA; using a super high performance liquid chromatography-mass spectrometry method to perform gradient elution, detecting the deoxy nucleoside through a multiple reaction detection method, calculating a reaction rate, and identifying a deoxyribose unit prone to adduct reaction with the new pollutant; and analyzing the detection result.

The utility model discloses an online detection device of dexamethasone sodium phosphate injection intermediate belongs to pharmacy detection field, including support, install ultraviolet spectrophotometer equipment on the support to setting liquid dilution bucket on the support, the liquid dilution bucket discharge opening is connected with the hose, and the bottom end of hose is connected with the pipe head, and the support is provided with the drive mechanism that drives the pipe head to move up and down, is provided with the cuvette on ultraviolet spectrophotometer equipment, and the support is provided with two clamps symmetrically, and two clamps all are pasted in the outer wall of cuvette, through the cooperation of above each device, through the gear drive first rack and second rack lift, to drive the pipe head realizes accurate lifting, and the cooperation clamp holds the cuvette, distinguishes from manual dosing, and the cuvette is fixed in the exactly same position every time, makes liquid to be able to follow the pipe head accurate and enter the inside of cuvette, greatly improves the detection efficiency.

This invention discloses a method for accurately measuring the content of azobisisobutyronitrile (AIBN) in dimethyl sulfoxide (DMSO) solution. The method includes the following steps: First, using DMSO as the solvent, prepare a series of standard solutions with AIBN mass concentrations ranging from 0 to 1.0%. Using the pure solvent as a blank reference, measure the absorbance of each standard solution at a characteristic wavelength of 350 nm using a UV-Vis spectrophotometer, ensuring the absorbance value is within the range of 0 to 1. Plot a standard curve with absorbance as the abscissa and concentration as the ordinate, and calculate the linear regression formula. When testing the test solution, use the same solvent as a blank reference and measure the absorbance at the same wavelength. If the absorbance is between 0 and 1, directly substitute it into the formula for calculation; if the absorbance is greater than 1, dilute with the solvent until the absorbance drops to the range of 0 to 1, multiply by the dilution factor, and calculate the original solution concentration. This invention is simple to operate, highly accurate, and repeatable, and is particularly suitable for the rapid detection of AIBN content in industrial production.

The application discloses a kind of methods for rapidly detecting malt filtration performance, comprising the following specific steps: (1) preparation of mash: after being ground malt is hydrolyzed and inactivated, to obtain mash;(2) the absorbance of the mash is determined under ultraviolet spectrophotometer after filtration, to judge the filtration performance.The method of the present application does not carry out fermentation experiment, and the filtration performance of malt is judged by rapid detection, which can truly reflect the filtration performance potential of malt, and predict the filtration performance in the brewing process, quickly and accurately judge the filtration in actual production, improve production efficiency, and ensure beer quality and stability.

1. Name of the product in this design: Photometer. 2. Purpose of this design: To detect parameters of various home lighting environments (color temperature, illuminance, color rendering index, spectrum, etc.). 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The present invention relates to coating compositions, coatings, and coating systems for radar transparency, and methods of making and using the same. A coating composition, coating, and coating system, and methods of making and using the same are provided. The coating system has a dynamic index of 2 or greater, and the coating system includes a coating formed from a coating composition. The coating composition includes a film-forming resin and a pigment composition. The pigment composition includes: 50 wt% or more of a radar-transparent pigment, based on the total weight of the pigment composition; and no more than 50 wt% of an electrically-conductive pigment, based on the total weight of the pigment composition. The coating system has a radar signal transmission of 70% or greater. The coating system has a CIELAB color difference, i.e., delta E, of no more than 4 compared to a color-matched coating system, as measured using a multi-angle spectrophotometer with D65 illumination and a 10° observer at 110°.

1. The name of the design product: UV-visible spectrophotometer. 2. The use of the design product: used for testing the content of components of chemical substances, used for testing the transmittance and absorbance of objects, used for analysis and research in many fields such as routine quality control and environmental protection, biochemistry, medical health, materials, etc. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model relates to animal illumination experiment device field discloses a kind of feeding environment experimental device for animal illumination research, including timing socket, monitoring display screen, rearing cage and the light-shielding cloth cover of complete containment package in the outside of rearing cage, the top of light-shielding cloth cover is roof, and the roof of light-shielding cloth cover is fixedly installed with adjustable ceiling lamp, adjustable ceiling lamp is installed in timing socket by the power cord A electrical plug connection of live plug A, and light regulator for adjusting adjustable ceiling lamp illuminance is installed on power cord A;Timing socket is electrically connected household ac power supply, and timing socket is used to set power-on frequency or / and length of time;The inside of the cover of light-shielding cloth cover is connected with several photometers, and each photometer is electrically connected with monitoring display screen.The utility model monitoring display screen gathers the video stream data of camera and the illumination data of photometer and stores and displays and call, can be applicable to different illumination time or different illumination intensity environment under animal sleep and growth each item experimental research.

This invention relates to the field of water quality component detection technology, specifically to a method for detecting multiple water components based on a UV-Vis spectrophotometer. The method includes: acquiring the left and right spectral curves of a dominant absorption peak; analyzing the proximity and smoothness of the wavelengths of the dominant absorption peaks to obtain the preferred side spectral curve for each peak; selecting pure absorption peaks based on the asymmetry of each peak and the difference between its non-preferred side spectral curve and the constructed standard spectral curve; obtaining the difference spectrum between the spectral curve and the standard spectral curve of the pure absorption peak, and repeating this process to obtain all pure absorption peaks; and performing qualitative and quantitative analysis based on the standard spectral curve to obtain the concentration of each component. This invention aims to solve the problem of overlapping absorption peaks of multiple components in the spectral images acquired by a UV-Vis spectrophotometer, thereby improving the accuracy of water quality component detection.

A device allowing the angular emission pattern of a source to be measured without mechanical movement comprises, in succession, along its optical axis: a first objective, called the Fourier objective, arranged to form a Fourier surface each point of which corresponds to one direction of observation of the object; a diffuser used in transmission and placed on the Fourier surface; a substance of optical density placed upstream of the diffuser and arranged to attenuate the light backscattered toward the Fourier objective and the areal source; and a video photometer located downstream of the plane of the diffuser and arranged to image the surface of the diffuser.

The present application belongs to the field of spectral analysis, and discloses a kind of annular capillary photometer.Light source and photoelectric detector are respectively arranged at the entrance and exit of straight capillary;The bending part of annular capillary adopts folding structure to reduce the reflection times of tube wall and transmission loss;Straight capillary and annular capillary are coupled with each other through mirror;The detection light beam emitted by light source enters annular capillary through straight capillary, and experiences multiple cycle transmission in it, and finally shoots out from another straight capillary;Light source can adopt wide spectrum light source, and its spectral range covers the absorption spectrum of the measured object.The annular capillary photometer of the present application does not need to accurately control the transmission trajectory of light beam, does not need fine parallel light beam, and also does not need to use multiple lasers to test multiple substances, which greatly reduces the cost of instrument;At the same time, by using the multiple cycle propagation of light beam in annular capillary, the optical path is greatly increased, and the transmission loss is reduced, so that the instrument has small size and high sensitivity.

A silicon table group based on sample water constant temperature control and environmental temperature compensation, in industrial water quality monitoring, silicon content is a key index, silicon table as the core equipment of detecting silicon content, its measurement accuracy is significantly affected by sample water temperature and environmental temperature. The utility model discloses a constant temperature device, silicon table main part, constant temperature device water inlet is connected to the sample water to be detected through sample water pipe, and the overflow cup of silicon table main part is connected through the water inlet pipe of constant temperature device outlet, the overflow cup receives the sample water after being treated through constant temperature device again through water inlet pipe, and then communicates with one side of the bottom of measuring tank through water outlet pipe, and the other side of the bottom of measuring tank is connected with reagent providing device through peristaltic pump pipe, and the measuring tank is in the inside of photometer, and the heating jacket is set on the outside of photometer, and the utility model is used for detecting the silicon content in water sample.

The present application relates to a kind of compound containing indole and quinoline skeleton and its application, belong to chemical technical field.The structural formula of the compound is as shown in formula I.The present application also provides the application of the compound in detecting specific metal ions, and the specific metal ions include copper ion (Cu 2+ ), manganese ion (Mn 2+ ), lead ion (Pb 2+ ), iron ion (Fe 3+ ).The present application includes the following technical effects:1) the novel compound containing indole and quinoline skeleton provided by the present application, as fluorescent probe, can detect trace Cu 2+ And Mn 2+ Two metal ions in the same test system.2) the present application provides the detection method for detecting trace Cu 2+ And Mn 2+ Based on novel probe, which is simple to operate, low in cost, without the aid of large instrument.Only need to use ultraviolet visible spectrophotometer, fluorescence spectrophotometer or simple ultraviolet lamp or ordinary visual method can be qualitative or quantitative judgment.

The purpose of the present invention is to provide an automated analyzer capable of improving analysis precision of blood serum. For said purpose, the present invention relates to an automated analyzer comprising: a liquid discharge mechanism that discharges a liquid into a reaction container; a photometer that acquires a luminous intensity at a time when the reaction container having accommodated therein the liquid discharged by the liquid discharge mechanism is irradiated with light; a mechanism control unit that controls the liquid discharge mechanism and the photometer; and a determination unit that determines the state of the reaction container on the basis of the luminous intensity acquired by the photometer. The determination unit determines whether or not the reaction container is contaminated with a separating agent, on the basis of a first luminous intensity acquired by the photometer when pure water is accommodated in the reaction container and a second luminous intensity acquired by the photometer when a surfactant-containing liquid is accommodated in the reaction container.

The present invention measures the content ratios of constituent materials in a product in a non-destructive manner.　This content ratio measurement device measures the content ratios of constituent materials constituting a product, the content ratio measurement device comprising: a content ratio estimation unit that estimates the content ratios of constituent materials constituting a target product for which the content ratios are to be measured, by inputting—to an estimation model that has been trained using fluorescent fingerprint data, measured with a fluorometer with respect to a training product for which the true values of the content ratios are known, and the true values of the content ratios of the training product, the fluorescent fingerprint data consisting of fluorescent intensities corresponding to combinations of excitation wavelengths and fluorescent wavelengths—the fluorescent fingerprint data measured with the fluorometer with respect to the target product; and a pass / fail determination unit that determines whether or not the estimated content ratios of the constituent materials constituting the target product satisfy design standards of the target product.

This utility model discloses a visible light spectrophotometer, including a photometer body and a detection frame. A sliding groove is formed on the inner side of the detection frame, with openings at both ends located on the left and right sidewalls of the frame. Two limiting rods are slidably connected to the inner side of the sliding groove. A screw is threadedly connected to the center of the top of the detection frame, with the bottom end of the screw located between the two limiting rods. This utility model makes the detection frame detachable. During installation, it is simply placed into the detection groove, and then the screw is turned downwards, pushing the two limiting rods outwards from the sliding groove to fix the detection frame. This significantly improves assembly and disassembly efficiency, facilitates deep cleaning and maintenance of the precision structures such as the internal sliding groove and positioning groove of the detection frame, avoids cross-contamination, and ensures the accuracy of long-term detection data.

The present application relates to a portable light source device for luminometer calibration.

The invention relates to a method for determining the stability of nanofluids. In this method, nanofluid stability is assessed quickly and easily by measuring changes in the color of the nanofluid, caused by nanoparticle sedimentation, using a color spectrophotometer. This approach enables the stability of nanofluids containing any type of nanoparticle to be evaluated and reduces costs by shortening the test duration.

This invention belongs to the field of biochemical detection technology and discloses a method for detecting the content of the biomarker GSH based on TMB colorimetric method. The specific technical solution is as follows: Step 1: Hydrogen-bonded organic framework is synthesized by hydrothermal method, and the transition metal Fe is introduced for modification to obtain HOF-Fe material; Step 2: Acetic acid-sodium acetate solution is used as background solution, TMB solution and H2O2 solution are added respectively, and finally HOF-Fe is added to react. The peroxidase-like activity of the material is measured by ultraviolet spectrophotometer; Step 3: Glutathione solution of different concentrations is added to the above reaction system to quantitatively detect glutathione. This method constructs a high-performance colorimetric sensor by preparing a novel HOF-Fe nanozyme, which can realize rapid, high-sensitivity and high-specificity detection of glutathione, and can be widely used in the determination of glutathione content in actual samples.