185 results about "Photometer" patented technology

The embodiment of the invention provides a preparation method of octahedral Ag2O nano-enzyme and a method for detecting H2O2 through a colorimetric method, and relates to the technical field of H2O2 detection. The method for detecting H2O2 by using the colorimetric method comprises the following steps: step S11, taking a plurality of centrifugal tubes, adding quantitative Ag2O solution and H2O2 with different concentrations into each centrifugal tube, and uniformly mixing; step S12, adding a NaAc-Hac buffer solution and a TMB (Tetramethylbenzidine) solution into each centrifugal tube treated in the step S11 to form an Ag2O-TMB-H2O2 reaction system, heating the Ag2O-TMB-H2O2 reaction system in each centrifugal tube in a water bath for a preset time, and observing the color change of the solution in each centrifugal tube; and step S13, determining a light absorption value of the Ag2O-TMB-H2O2 reaction system at a preset wavelength through an ultraviolet photometer, and recording data. The method for detecting H2O2 through the colorimetric method has the advantages of being simple in operation process, accurate in detection, visual in result and the like.

An anti-reflection film (1) is provided with a transparent base film (2), an anti-reflection layer (3), and an antifouling layer (4) in this order toward one side in the thickness direction. The transparent substrate film (2) is provided with a transparent resin film (21). The anti-reflection layer (3) is an alternating laminate comprising at least one niobium oxide layer (31) and at least one silicon oxide layer (32), and the layer of the anti-reflection layer (3) closest to the antifouling layer (4) is the silicon oxide layer (32). Furthermore, in a difference spectrum calculated from Fourier transform infrared spectrophotometer analysis (FT-IR analysis), when the maximum absorption peak intensity originating from Si-O-Si symmetric scaling near 1050 cm <-1 > is standardized to 1 and the absorption peak intensity originating from Si-O-Si asymmetric scaling at 1200 cm <-1 > is defined as X, 1 / X is 5.0 or more.

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 invention provides a rapid pollutant detection method based on spectral feature analysis, and relates to the technical field of environmental pollutant spectral detection, and the method comprises the following steps: obtaining an original absorption spectrum of a sample, and preprocessing and reconstructing an intrinsic spectral signal; extracting three types of features of morphology, frequency domain energy distribution and phase disturbance, and splicing to obtain a multi-dimensional joint feature tensor; pollutant classification and confidence judgment are completed through an improved CNN, and concentration is predicted through a linear regression model synchronously; in combination with a Mahalanobis distance verification result, deep residual network secondary feature mining is triggered for a low-confidence sample, a final type is determined according to a fusion result, and the concentration is corrected; and generating a detection report and dynamically updating the spectral feature intrinsic library. The method is adaptive to a portable ultraviolet-visible spectrophotometer, the single sample detection time consumption is less than 10min, the classification accuracy is greater than or equal to 90%, the unknown pollutant judgment accuracy is greater than or equal to 89%, and the method is suitable for on-site rapid detection.

The present invention provides excellent visibility of a printed part formed by laser marking. This liquid compression molding material comprises (A) an epoxy resin, (B) a curing agent, (C) an inorganic filler, and (D) a coloring material, wherein the absorbance measured under the following absorbance measurement conditions using a photometer is 3.5 or more. (Absorbance measurement conditions) Measurement sample: a cured product obtained by curing the liquid compression molding material through a heat treatment at 150°C for 60 minutes. Thickness of measurement sample: 260 μm Measurement wavelength: 1064 nm

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 relates to the technical field of intelligent agriculture and plant protection, and particularly discloses a broccoli black spot early diagnosis system and method based on multi-modal machine learning fusion, which comprises a portable collection platform, a mobile experiment terminal and a server. The portable collection platform is integrated with a hyperspectral imaging camera, a chlorophyll fluorescence imager, a dark-adapted leaf clamp and a camera for sample barcode recognition, and is provided with an adjustable height support and a controllable light source to ensure the consistency of data collection conditions. The mobile experiment terminal is internally provided with a physicochemical index rapid detection module, including a portable PCR instrument for on-site nucleic acid rapid extraction and amplification and a miniature ultraviolet spectrophotometer for rapid determination of pigment content. The broccoli black spot early diagnosis system and method based on multi-modal machine learning fusion are highly integrated, portable and automated, are suitable for a field environment and provide an efficient disease diagnosis tool for non-expert users.

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.

A wearable smart ring includes an annular body sized to receive a finger, photoplethysmography (PPG) sensors arranged along an inner peripheral surface, and a microfluidic perspiration collector disposed at the inner surface. The collector has microchannels that draw perspiration by capillary action into one or more reservoirs and includes a region that concentrates or retains biomarkers. A docking station mechanically receives the ring for charging and interfaces with the collector to transfer fluid and / or perform in-situ analysis. The dock includes optical instrumentation (e.g., photometry, spectroscopy such as Raman) and may implement pumping and flushing to reset the collector for subsequent use. A controller communicates results by wireless links. The system enables passive collection of perspiration during wear and detailed biomarker analysis during charging, thereby augmenting PPG-derived physiological measurements with perspiration chemistry without burdening ring power or size.

The utility model relates to the technical field of flame photometers, in particular to a quick-release flame photometer which comprises a fixed plate, a bottom plate, side plates, a panel and a back plate, the fixed plate is connected to a side plate of the flame photometer body, and the side plate is positioned on the opposite side of the fixed plate; the bottom plate is arranged between the fixed plate and the side plates, and the bottom plate is connected with the bottoms of the fixed plate and the side plates through hinge structures; the face plate and the back plate are connected to the two adjacent edges, connected with the bottom plate, of the side plates through hinge structures respectively. The bottom plate, the side plates, the face plate and the back plate are sequentially unfolded through the hinge structures, so that the ignition box can be quickly disassembled, after the ignition box is unfolded, the bottom plate, the side plates, the face plate, the back plate and the fixing plate jointly form a plane, and sufficient operation space is provided for cleaning tools; therefore, a user can conveniently clean all parts inside the cleaning device, and cleaning dead angles are avoided. The maintenance operation process is simplified, and the cleaning and maintenance time cost of a user is reduced.

The utility model provides a portable ultraviolet and visible spectrophotometer, which belongs to the technical field of photometers, and structurally comprises a portable box group, an ultraviolet and visible spectrophotometer main body is sleeved in a cavity on the top surface of the portable box group, the portable box group comprises a box body group, and a telescopic pull rod piece is vertically arranged in the middle of the bottom surface of the box body group. A rolling and pulling cover group for covering the ultraviolet and visible spectrophotometer main body in a dustproof manner is arranged in the middle of the top surface of the box body group, and a first supporting leg group and a second supporting leg group are respectively arranged at the upper ends of the left side and the right side of the box body group, so that when the ultraviolet and visible spectrophotometer is carried, the portable box group can be moved in a push-pull manner or a lifting manner; the portable box group can be placed on the ground in an inclined angle through the cooperation of the first supporting leg group and the second supporting leg group, and the portable box group can be horizontally placed on the ground through the folding of the first supporting leg group and the second supporting leg group, so that the portable box group has more multi-angle choices during testing, and is convenient to use during field testing.

The invention relates to an optical path length adjusting device of a micro spectrophotometer for measuring the optical property of light passing through a sample. The optical path length adjusting device of a spectrophotometer according to the present invention comprises: a housing; a cover arm mounted so as to be rotatable about a hinge shaft provided on one side of an upper portion of the housing; a cover arm retainer on which the free end of the cover arm rests in the closed state; a lower base irradiated with light transmitted from a lamp installed inside the housing through an optical fiber; the upper base is supported by the cover arm and is positioned above the lower base; a lower base moving device configured to vertically move the lower base relative to the upper base; the spectrograph is configured to receive the light which is irradiated on the lower base and passes through the light path through the optical fiber and analyze and display the measurement characteristics of the sample, and the opposite surfaces of the lower base and the upper base are in a non-parallel state. The light path length adjusting device of the micro spectrophotometer is simple in structure, so that high-precision absorbance measurement can be carried out in an ultra-high concentration range without precise control.

The present disclosure provides an integrating-sphere-assisted resonance synchronous (ISARS) spectroscopy method performed with an ISARS spectrophotometer, for example, a spectrofluorometer equipped with an integrating-sphere accessory. The methods and systems of the present disclosure utilize the ISARS spectrophotometer equipped with an integrating sphere to determine the ISARS spectral intensity, quantify the ISARS-based absorbance, and subsequently evaluate the sample's double-beam UV-vis absorbance spectrum (also known as the absorption extinction spectrum). This ISARS method enables quantitative separation of light absorption and scattering contribution to the sample UV-vis extinction spectrum measured with double-beam UV-vis spectrophotometer.

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.

The present invention provides a LiDAR test method comprising the steps of: preparing a device under test; arranging a photometer in a direction of orientation of the device under test; measuring light of a test environment by using the photometer, and performing a performance test on the device under test; and recording at least one of the measured light of the test environment, performance of the device under test, and an influence caused by the light of the test environment. The LiDAR test method according to the present invention enables creation of a test environment under various conditions and precise measurement of performance of a device under test.

The utility model provides a smoke filtering performance testing device for a filtering piece. The smoke filtering performance testing device comprises a case, a positioning seat, a pressing device, a particle generator, an air pump, a first particle photometer, a second particle photometer and a control screen, a first air hole is formed in the positioning seat; the pressing device comprises a mounting frame, an air cylinder and a pressing seat; the mounting frame is fixed on the case; the air cylinder is mounted on the mounting frame; a power output end is connected with the pressing seat; the pressing seat is positioned above the positioning seat; a second air hole is formed in the pressing seat; the particle generator is connected to one side of the positioning seat through a first air pipe and communicates with the second air hole; a detection head of the first particle photometer is connected to the other side of the positioning seat and is communicated with the air hole; the air pump is connected to the bottom of the second air hole through a second air pipe; a detection head of the second particle photometer is connected to one side of the positioning seat and is communicated with the first air hole; the display screen is respectively in electric signal connection with the cylinder, the particle generator, the air pump, the first particle photometer and the second particle photometer; according to the design, the smoke filtering performance of the filtering piece can be detected with high precision.

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.

The application discloses a kind of spectrophotometer linearity calibration device and its use method, it is related to photometer technical field.The device includes: the U-shaped section of upper flat plate, lower flat plate and U-shaped groove is mutually parallel;Two U-shaped grooves are opposite;Each U-shaped groove upper end is fixedly connected to upper flat plate by stand column, and lower end is fixedly connected to lower flat plate by stand column;It further includes that upper push rod penetrates upper flat plate and is fixed to upper flat plate, for driving upper flat plate to move up and down;Stand column penetrates parallel to upper flat plate upper flat plate;Upper vertical plate is vertically arranged on the lower surface of upper flat plate, and both sides are located in two U-shaped grooves respectively;Upper vertical plate moves up and down with upper flat plate;Lower push rod and upper push rod, lower flat plate and upper flat plate are respectively symmetrically arranged;Lower vertical plate is arranged opposite to upper vertical plate up and down.The device is based on single light source method, can avoid the influence of inconsistent light source in multiple light source method, linearity measurement can cover wide range of wavelength, and has smaller calibration error and higher calibration accuracy.

This invention belongs to the field of food testing technology, and particularly relates to a method for determining chloride ions in special medical foods, including the following steps: (1) Sampling: Weigh 1.0g of sample into a graduated plastic tube; (2) Standard curve formulation: Optimize the standard working curve, and according to the optimized standard working curve, measure the standard working solution from low concentration to high concentration using a spectrophotometer, and plot the standard curve with absorbance as the ordinate and chloride ion concentration as the abscissa; (3) Sample pretreatment: Weigh the sample into a special medical food pretreatment device, add water and nitric acid solution, mix thoroughly, seal and soak for extraction, separate solid and liquid, make up the volume of the separated liquid, and let it stand to obtain the test solution; (4) Determination: Measure a certain amount of the test solution into a 100mL volumetric flask, add nitric acid solution and silver nitrate, let it stand, and then measure it at 400nm using an ultraviolet spectrophotometer.

According to the technical solution of the present invention, a vertical mass concentration curve of fine aerosol component distribution can be obtained based on remote sensing test cooperation of a ground Lidar and a solar photometer, specifically, an internal mixing model and a normalized volume distribution model are constructed according to the light absorptivity and the water solubility of aerosol components, and separates out profiles of inorganic salt components, black carbon components, water-soluble organic matter, water-insoluble organic matter, fine aerosol water content components and the like to obtain corresponding vertical distribution. A new thought and development direction can be provided for remote sensing inversion of Lidar and the like, and meanwhile, development of aerosol component spectrums is promoted. According to the comparison of on-site observation data and reanalysis data, the vertical distribution of aerosol components obtained by the technical solution is relatively reasonable, and has popularization value.

The invention relates to the field of oil field wastewater treatment, in particular to a method for treating organic pollutants in oil field wastewater based on activated carbon and activated persulfate, which comprises the following steps: filling a packed bed reactor with light transmission with a coal pitch-based waveguide photocatalytic material in a fixed bed form; pumping the oilfield wastewater to be treated into the bottom of the packed bed reactor from a water inlet of the packed bed reactor, staying, and continuously adding a persulfate solution into a water inlet pipeline; turning on a visible light source; a TOC analyzer and an ultraviolet spectrophotometer are arranged at a water outlet of the packed bed reactor and used for monitoring water quality parameters of effluent in real time. An existing method is poor in organic pollutant removal effect, but the method provided by the invention is good in organic pollutant removal effect.

The utility model discloses an ultraviolet spectrophotometer for a laboratory, which comprises an equipment main body, a base arranged at the top of the equipment main body, a slot arranged on the surface of one side of the base, a drawing plate arranged on the inner side of the slot, a bottom plate arranged on the lower part of the inner side of the drawing plate, a fixing piece arranged on one side of the bottom plate far away from the drawing plate, and clamping rods arranged at two ends of the fixing piece, a suspended plate is arranged on the upper side of the bottom plate, and one end of the suspended plate is inserted into the inner side surface of the drawing plate. By arranging the drawing plate, the bottom plate and the suspension plate, different cuvettes, test tubes and other appliances for loading sample solutions can be placed after the side surface structure is pulled out, and are arranged according to the number plates, so that a batch of solutions or the whole solutions needing to be injected into the cuvettes can be treated at a time, repeated operation of a user is not needed, and the cost is reduced. Particularly, when a single cuvette is required to be detected for multiple times, the cuvette can be placed at a suspended plate at any time, so that the operation of a user in an experiment process is more convenient.

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.

Provided is a resin molded product having excellent scratch resistance. The resin molded product of the present invention is a resin molded product including a methacrylic-based resin composition, in which the methacrylic-based resin composition contains a (meth)acrylic-based polymer (A) and a fatty acid compound (B), and an absorbance ratio P1 / P2 of a peak absorbance P1 in a wave number range of 1630 to 1650 cm−1 to a peak absorbance P2 in a wave number range of 1710 to 1730 cm−1 on a surface of the resin molded product, measured by a single reflection ATR surface reflection method with an infrared spectrophotometer, is 0.0040 or more.

The invention discloses a photoetching paper detection device. The photoetching paper detection device comprises a circular chassis, a protractor and a light shield, the light shield is provided with a coaxial pointer which corresponds to the protractor, the bottom of the light shield is provided with a light hole which is coaxial with the central through hole of the circular base plate, the surface of the circular base plate is provided with a light shield layer, and the circumferential surface of the circular base plate is provided with an angle scale. By quickly and accurately adjusting the space angle of the light shield, the omni-directional detection process of a detection point on photoetching paper by using an external spectrophotometer is facilitated, the detection efficiency is improved, the detection quality and the detection accuracy are ensured, and the device has the advantages of simple overall structure, convenience in operation, small size and low cost, and is suitable for popularization and application. And the requirements of the existing packaging and printing industry on production, inspection and anti-counterfeiting detection of the photoetching paper can be quickly met.