109 results about "Opacity" patented technology

The invention discloses a liquid medicine foreign matter detection method and system based on machine vision, and the method comprises the steps: obtaining multiband spectral data of a liquid medicine sample, and carrying out the normalization processing to generate a liquid medicine background standard spectral feature template; comparing the refractive index spectral characteristics of the template and the foreign matter-containing liquid medicine, and recording the surface roughness scattering mode and polarized light reflection angle change data of a foreign matter area; calculating a spectrum peak displacement quantized value according to the polarized light data, and extracting foreign matter edge spectrum gradient information in combination with a threshold value; calculating a transparency spectral attenuation coefficient based on the edge gradient information, and obtaining spectral contrast enhancement factors of different foreign matters in combination with the spectral response characteristic data; and if the enhancement factor does not reach the standard, adjusting the spectrum correction parameter and recalculating, fusing the scattering mode and the multi-angle incident spectrum response result to carry out consistency verification, and obtaining a final identification result containing the foreign matter material type and the danger level. The method can improve the drug detection accuracy and guarantee the drug quality safety.

The invention relates to the technical field of three-dimensional reconstruction, in particular to a near-infrared assisted low-light scene three-dimensional reconstruction method based on 3D Gaussian splashing, which is characterized in that generation of a Gaussian ellipsoid is dominated by a near-infrared image with a high signal-to-noise ratio, and a stable geometric basis is provided for a visible light information missing area; in the rendering stage, a near-infrared rendering image and a normal visible light rendering image are respectively generated through Gaussian ellipsoid shared geometric parameters and respective opacity and color attributes of two modes; through cross-modal structure similarity loss, a normal visible light image which is forcibly rendered is aligned with a near-infrared light image in structure, and clear near-infrared structure information is used to strictly constrain the recovery process of the color of the visible light image, so that the accuracy and authenticity of a recovery result are ensured.

The invention discloses a volume cloud rendering method and system based on three-dimensional Gaussian splash, and the method comprises the steps: carrying out the feature matching and structure reconstruction of a volume cloud image through an SfM algorithm, obtaining a sparse point cloud in a scene, and representing the sparse point cloud as an anisotropic Gaussian ellipsoid; decomposing the illumination transmission process of the volume cloud into two parts of forward single scattering and internal multiple scattering based on a radiation transmission equation to obtain an illumination modeling formula embedded volume cloud rendering process; determining the contribution of each three-dimensional Gaussian ellipsoid to a rendering result according to the opacity index of the three-dimensional Gaussian ellipsoid, and dynamically cutting the low-contribution three-dimensional Gaussian ellipsoid by adopting a delay deletion strategy to reduce redundancy; a comprehensive loss function is constructed, so that the three-dimensional Gaussian model is focused on the volume cloud region and the structure detail reduction capability is enhanced; and outputting the optimized volume cloud rendering result and the three-dimensional Gaussian model. According to the method, the volume cloud rendering efficiency and quality are effectively improved on the premise of ensuring real-time rendering.

The invention discloses a layered densification Gaussian sputtering method based on visibility, and relates to the technical field of artificial intelligence and computer vision. According to the scheme, an initial three-dimensional Gaussian primitive set is generated based on sparse multi-view observation data, and initial scene representation is established by extracting spatial distribution parameters, morphological parameters and radiation parameters; performing fusion analysis on the Gaussian primitives based on the multi-dimensional observability parameter set to obtain comprehensive observability index data; executing hierarchical clustering according to the index data, and constructing a multi-layer Gaussian structure of a significant layer, a transition layer and a background layer; performing density enhancement, geometric continuity constraint and parameter update processing on different levels of Gaussian structures, and generating a rendered image of a target view angle under a volume light traveling and transparency hybrid mechanism; according to the method, continuous reconstruction of a scene structure and accurate expression of radiation characteristics can be realized under the sparse view condition, and the geometric fidelity and rendering consistency of new view angle synthesis are improved.

The invention discloses a three-dimensional Gaussian splashing and rasterization pipeline fused view synthesis system and method. The method comprises the following steps of: 1, acquiring two-dimensional Gaussian primitives; 2, converting the two-dimensional Gaussian primitive into two triangular grids, and converting the two triangular grids into a world coordinate system; 3, baking the spherical harmonic coefficient of the color and the opacity data in a texture form; 4, enabling each Gaussian primitive to correspond to a texture block on the texture image set, enabling a triangle to cover the texture block in a UV space, and obtaining a Gaussian weight; 5, based on the obtained Gaussian weight, simulating an alpha mixing behavior in the three-dimensional Gaussian splashing pipeline by using a time-based jitter anti-aliasing method; and 6, training a symbol vector field SDF branch while training, and mutually supervising and constraining the output of the symbol vector field and the output of the two-dimensional Gaussian. The three-dimensional Gaussian splash can be rendered in a traditional rasterization pipeline of the unreal engine 4, and the fidelity equivalent to that of a special training pipeline is kept.

The invention discloses infrared night vision AR (Augmented Reality) intelligent glasses based on multispectral fusion, and relates to the technical field of infrared intelligent application. High-precision scene perception in a low-light / light-free environment is realized by fusing dual-channel data of low-light imaging and infrared thermal imaging and combining cross-modal feature matching and dynamic pose compensation; an environment detail structure is restored by a low-light image enhancement technology, thermal feature targets such as organisms are accurately recognized through thermal imaging target segmentation, and a three-dimensional environment model with space geometric information and target attributes is constructed through heterogeneous feature fusion; and dynamically adjusting the display transparency of the key target in the AR view field through a virtual information layer adaptive mixing mechanism driven by a hot target attribute, and finally outputting a virtual-real fused enhanced view, thereby breaking through the illumination limitation of the traditional AR glasses, and improving the visual effect of the AR glasses. And immersive augmented reality experience with panoramic detail perception and hot target accurate positioning is provided for the user in a dark environment.

The invention discloses a bimodal real-time three-dimensional imaging method based on an LED light source, which is applied to a bimodal real-time three-dimensional imaging system based on the LED light source, and comprises the following steps: step 1, calibrating a calibration plate on an ultrasonic transducer, and obtaining a transformation matrix from a two-dimensional image coordinate system to a calibration plate coordinate system; step 2, moving an ultrasonic transducer to scan an imaging target, synchronously acquiring and reconstructing a two-dimensional ultrasonic image and a two-dimensional photoacoustic image, and tracking and recording pose information of the calibration plate in real time in an optical positioning mode, namely a transformation matrix from a calibration plate coordinate system to a camera coordinate system; step 3, based on the transformation matrix, mapping a two-dimensional ultrasonic imaging result and a two-dimensional photoacoustic imaging result obtained in real time to the same three-dimensional space through coordinate transformation; and 4, respectively adjusting the color and transparency parameters of the ultrasonic and opto-acoustic two modal images, fusing and rendering in real time, and displaying the bimodal three-dimensional image.

This invention is an optical structure with a plurality of movable reflective elements. These reflective elements have first configurations which allow transmission of environmental light. These reflective elements have second configurations which block (or reduce) transmission of environmental light and which reflect light from a virtual-object display toward a person's eye. This enables display of a relatively-opaque virtual object in an area of a person's field of view, while providing the person with a relatively-clear view of their environment in the rest of their field of view.

The invention belongs to the technical field of scintillation materials, and particularly relates to a chromium ion doped near-infrared scintillation crystal and a preparation method and application thereof. The chromium ion-doped near-infrared scintillation crystal has a molecular formula of A3B2-xCrxC3O12, x is greater than or equal to 0.005 and less than or equal to 0.1, and after a chromium ion-doped ultraviolet-visible light inorganic scintillator is adopted, light is emitted at the wavelength of 650-950 nm and has good wavelength matching with a silicon photoelectric detector. Besides, single crystal growth is carried out by adopting a Czochralski method, the crystal growth process is optimized, the ion doping concentration is regulated and controlled, the scintillation performance of the chromium ion doped near-infrared scintillation crystal in the near-infrared band is improved, the requirement of the chromium ion doped near-infrared scintillation crystal in the radiation detection field is further met, and the problem that an existing scintillation crystal is low in transparency is solved.

The invention discloses a high-temperature high-density plasma generation and radiation opacity measurement method, which comprises the following steps: clamping a target material by using low-density low-Z-element foam to form a sandwich structure sample, and synchronously and directly driving the sandwich sample from two sides by using multiple beams of smooth nanosecond laser, the preparation temperature reaches 1,000,000 DEG C, and the electron density reaches 1 * 1023 pieces per cubic centimeter; then generating an X-ray source through the action of one or more nanosecond laser beams and the high-Z material, measuring the absorption spectrum of the X-ray source penetrating through the target plasma, the backlight spectrum of the X-ray source not penetrating through the target plasma and the self-emission spectrum of the target plasma through a spectrograph, and finally realizing the measurement of the radiation opacity of the high-temperature and high-density plasma. The high-temperature and high-density plasma radiation opaqueness measurement device has the beneficial effects that the high-temperature and high-density plasma radiation opaqueness measurement of which the temperature reaches 1,000,000 DEG C and the electron density reaches 1 * 1023 per cubic centimeter is realized on a million-joule nanosecond laser device.

This invention discloses a high-gain vehicle-mounted optically transparent antenna with improved radiation pattern, operating in the 0.74-0.87 GHz range. The invention includes a substrate, an antenna body, and a system ground plane. The substrate comprises a PET film layer, an OCA adhesive layer, and a PC dielectric substrate. The antenna body consists of two trapezoidal radiating patches, a reverse cancellation strip, a feed line, and a system ground plane located on the same layer as the antenna. The two trapezoidal radiating patches are connected by the reverse cancellation strip, which links their longer base edges. Its transparency is primarily achieved through the use of a transparent substrate material and a metal mesh structure composed of thin and fine metal wires. The cascaded trapezoidal radiating patches and the connected reverse radiation strip achieve performance improvements such as high gain, wide bandwidth, and improved horizontal radiation pattern nulls. This invention can achieve optical transparency of over 70%, radiation efficiency of over 65%, and radiation pattern null improvement of over 3 dB in the operating frequency band.

The application discloses the technical fields of environmental monitoring and water analysis and relates to a water transparency detector with self-immunization of optical window pollution, which comprises a light source, a first reflector, a beam splitter, a sample cell, a second reflector and a third reflector. The first reflector reflects the light of the light source to the beam splitter, and the beam splitter divides the light into transmitted light and reflected light. The transmitted light transmits through the sample cell and is converged by the second reflector to a transmitted end photoelectric detector. The reflected light is converged by the third reflector to a reference end photoelectric detector. The water transparency can be calculated according to the light intensity of the transmitted end photoelectric detector and the reference end photoelectric detector. The application dynamically offsets the error caused by the optical window pollution, light source fluctuation and detector drift through a double-light-path signal and a clean and polluted window pollution error double-ratio real-time compensation algorithm, so that the measurement accuracy can be ensured without a physical cleaning device. In addition, the application can monitor the change trend of the light intensity ratio and actively sense the degree of optical window pollution.

The invention discloses an optical window pollution self-immune water transparency detector and a detection method in the technical field of environmental monitoring and water analysis. The optical window pollution self-immune water transparency detector comprises a light source, a first reflecting mirror, a spectroscope, a sample pool, a second reflecting mirror and a third reflecting mirror, the first reflector reflects light of the light source to the spectroscope, and the spectroscope divides the light into transmission light and reflected light. Transmission light penetrates through the sample cell and is converged to a transmission end photoelectric detector by a second reflector; the reflected light is converged to a reference end photoelectric detector by the third reflector; and the water transparency can be calculated according to the light intensity of the transmission end photoelectric detector and the reference end photoelectric detector. According to the invention, errors caused by optical window pollution, light source fluctuation and detector drift are dynamically counteracted through a double-optical-path signal and a pollution error double-ratio real-time compensation algorithm of a clean and polluted window, the measurement accuracy can be ensured without a physical cleaning device, the change trend of a light intensity ratio can be monitored, and the measurement accuracy is improved. And the pollution degree of the optical window is actively sensed.

The embodiment of the application provides a kind of water transparency measurement system, method, equipment, medium and program product, it is related to water quality detection technical field, the system includes: measuring equipment and electronic equipment;Measuring equipment is obtained by gathering in the process of sinking from water surface into the water to be measured water data sequence including multiple groups of water data, each group of water data includes the light intensity data and water depth data collected at the same time;Electronic equipment inputs water data sequence into water transparency calculation model, obtains the water transparency that water transparency calculation model is based on water data sequence output.In the above system, water transparency is obtained by the light intensity data and water depth data of objective measurement, and is calculated by water transparency calculation model, and does not need to rely on the subjective visual observation of measurement personnel, to ensure the objectivity and consistency of measurement process, and obtain accurate water transparency measurement result.

The present application relates to the field of optical sensing technology, and provides a transparent tomographic imaging method based on an edge convex lens array, which receives an incident light source at a first end face to generate a first light signal, and the first light signal is transmitted along the first end face to a circumferential side face. The first light signal is encoded by a convex lens array structure arranged at the circumferential side face, and at least one group of second light signals is obtained after encoding. The second light signal is sensed by at least one optical detection module. The optical detection module transmits the second light signal to a signal reconstruction module for tomographic reconstruction to obtain a third light signal. The present application also discloses a sensing device. The method and the sensing device can transfer the sampling and encoding process of the light signal from a plane to an edge region of an imaging plane, realize angle-related optical encoding of the in-plane propagating light signal, and obtain an imaging result through tomographic reconstruction. Thus, the technical problems of limited transparency and limited resolution in the existing transparent imaging scheme are overcome.

The present application relates to a kind of asteroid global terrain three-dimensional reconstruction method for illumination change, comprising the following steps: input asteroid optical image, estimate camera pose and generate sparse point cloud, initialize Gaussian radiation field;Using image segmentation large model outputs the segmentation mask of asteroid optical image, prunes Gaussian radiation field;In combination with the mixed mask output by Gaussian radiation field, identify the shadow area of asteroid surface;The camera position, spherical harmonic coefficient and hash coding are combined into incident light angle, input into neural network, and the color value of Gaussian cell of illumination and shadow area is regressed;Add depth normal consistency loss and rotation variance and scale constraint loss, combine photometric loss to jointly supervise the optimization of Gaussian radiation field, calculate Gaussian opacity field, extract the three-dimensional model of asteroid global terrain.The present application can identify the shadow area on asteroid, improve the three-dimensional reconstruction precision of asteroid with surface illumination change.

The invention discloses a high-load transparent rare earth complex organic glass scintillator as well as a preparation method and application thereof. The scintillator comprises a polymer matrix and an ionic rare earth complex dispersed in the polymer matrix, the rare earth complex comprises coordination anions and ionic liquid cations, the coordination anions comprise rare earth ions and organic ligands, and the loading capacity of the rare earth complex in the polymer matrix can reach 80-90 wt%. According to the scintillator, an ionic liquid is introduced to construct an ionic supramolecular structure, effective isolation of a luminescence center is realized by utilizing steric hindrance and a charge shielding effect, concentration quenching is inhibited, and compatibility with a matrix is enhanced, so that the material still keeps transparency of 90% or above under an ultrahigh load. The maximum radiation luminous intensity of the scintillator is 23.9 times that of commercial LYSO, the lower detection limit is as low as 56nGy / s, and the scintillator is suitable for the fields of high-energy particle detection, X-ray imaging and the like.

The invention discloses an organic glass scintillator material as well as a preparation method and application thereof. The material comprises a dynamic covalent cross-linked polymer network formed by reaction of an epoxy monomer containing a halogenated conjugated group, a polyfunctional carboxylic acid curing agent or a polyfunctional anhydride curing agent and a transesterification catalyst. According to the invention, through molecular structure design, the cross-linked network unit has the characteristic of intrinsic radiation luminescence, a luminescent object does not need to be physically doped, and the bottlenecks of easy precipitation, easy phase separation, low optical transparency and the like of the traditional doped scintillator are fundamentally solved. The obtained material has efficient radiation luminescence and high transparency, and the imaging spatial resolution is remarkably improved. Meanwhile, the topological rearrangement characteristic of the dynamic ester bond is utilized, the defect that the thermosetting scintillator cannot be recycled is overcome, and self-repairing, morphology customization and cyclic remodeling of the device are achieved. The method is simple in preparation process and has important significance in the fields of X-ray imaging, nondestructive testing and the like.

A transparent display screen is disclosed, and may include a transparent substrate, a pixel layer, a full-area opacity layer, and a plurality of electrodes. The transparent substrate may define a display plane and a display direction perpendicular to the display plane. The pixel layer may be supported on the transparent substrate and may have a plurality of opaque light-emitting diodes arranged at a distance from one another in the display plane. The full-area opacity layer may be formed in the transparent substrate and may be arranged behind the display plane with respect to the display direction and extending parallel to the display plane. The plurality of electrodes may be arranged in the full-area opacity layer and behind the opaque light-emitting diodes with respect to the display direction.

The invention belongs to the technical field of cataract crystal evaluation, and particularly relates to a cataract crystal turbidity degree quantitative evaluation method based on optical coherence tomography. OCT original data are calibrated through standard scatterer signals, the influence of equipment parameters and individual differences is eliminated, the objective comparability of physical quantities such as attenuation coefficients is ensured, and the accuracy of evaluation of the turbidity degree of a cataract crystal is improved. Subregions are accurately divided according to a crystal anatomical structure, attenuation coefficients of depth resolution and spatial texture features are synchronously extracted, limitation of single features is broken through, sensitive analysis of local opacity is realized, finally, multi-region and multi-dimensional parameters are automatically integrated by using a pre-trained feature fusion model, continuous comprehensive opacity quantitative indexes are generated, and the opacity analysis accuracy is improved. Dependence on artificial experience is completely avoided, and the sensitivity and repeatability of evaluation are remarkably improved; finally, closed-loop evaluation of calibration, regionalized decoding and intelligent quantization is formed.

The invention belongs to the field of space target imaging, and discloses a space target three-dimensional reconstruction method for inhibiting dark color interference through combination of brightness and transparency, which is used for solving the problems of poor imaging quality and inaccurate pose estimation of a space target. According to the method, multiple requirements of improving the quality of an input image, adjusting a pose and training a three-dimensional model are jointly completed, and low-quality imaging of an incomplete imaging system is preprocessed based on lucky imaging; and then, dense feature points are extracted by using a pre-training network based on no detector, estimation of a three-dimensional initial point cloud and an initial pose of a camera is carried out, and pose joint adjustment is carried out by combining RANSAC and Bundle AdJustlement. During training, an MLP-based optimizer is used for calculating the deviation of pose adjustment, meanwhile, training of parameters of three-dimensional Gaussian primitives is carried out, and after various physical constraints are added, a one-stop assembly line can be implemented. According to the method, the good basic shape and the sharp edge of the model are kept, the good anti-noise capability is achieved, and meanwhile the real-time performance and the robustness are achieved.

The disclosed apparatus may include an antenna radiating structure that includes an active transparent mesh portion as well as a non-transparent antenna radiator portion. By combining transparent metal mesh and non-transparent metallic film into the antenna radiating structure, the disclosed apparatus results in improved radiation efficiency. Moreover, when overlaid on a transparent lens (such as with a pair of augmented reality glasses), the antenna radiating structure leaves the optical transparency of the lens largely unaffected due to the placement of the non-transparent metallic film. Various other implementations are also disclosed.

The present application relates to the field of eutrophication lake water ecological restoration, and discloses a device and system for improving underwater light conditions of a lake. Natural light on the water surface is introduced into the underwater area near the device through refraction and reflection by using a light path system, effectively improving the underwater light intensity. A wave dissipation system is arranged below the light path system to prevent disturbance of the water body and sediments by small waves, to a certain extent, reducing the influence of sediments and resuspension on water transparency, and further improving the underwater light conditions. The light path system, the wave dissipation system and the underwater fixing system are sequentially fixed and connected from top to bottom, and the height of the light path system and the wave dissipation system is adjusted through the underwater fixing system with the rise and fall of the water surface, improving the applicability of the device. The device has the characteristics of simple structure, convenient operation, good performance, easy installation and recycling, etc. It can effectively reduce the adverse effects of insufficient underwater light of the lake and wave disturbance on the growth of submerged plants.

The invention discloses a coplanar waveguide feed-based T-shaped ultra-wideband transparent antenna and a design method thereof, and belongs to the technical field of ultra-wideband transparent antennae, the coplanar waveguide feed-based T-shaped ultra-wideband transparent antenna comprises a transparent dielectric substrate, and a coplanar waveguide feed structure, a radiation unit and a grounding plate structure are integrated on the same surface of the transparent dielectric substrate; the radiation unit is a T-shaped composite radiation patch; the grounding plate structure comprises two L-shaped windows, and the L-shaped windows are formed in the large-area grounding plane; and the two L-shaped windows are symmetrically distributed about the central longitudinal axis of the antenna and form partial projection overlapping with the T-shaped composite radiation patch. Through the collaborative design of the specific T-shaped composite radiation patch and the symmetrical L-shaped window, a plurality of resonant modes are effectively excited and deeply fused, so that the bandwidth limitation of the transparent antenna is overcome, and a key component is provided for a transparent integrated communication terminal; the whole structure is compact, the transparency is high, and stable and efficient ultra-wideband work can be achieved within the frequency band ranging from 4.7 GHz to 7.45 GHz.

The invention discloses an optically transparent vehicle-mounted planar traveling wave end-on-fire antenna, which structurally comprises a feed waveguide, a glass-based medium mirror image waveguide and a transparent wedge-shaped transition layer, wherein the feed waveguide is provided with an electromagnetic wave incident port; the glass-based medium mirror image waveguide is plated with an indium tin oxide (ITO) conductive layer; and the transparent wedge-shaped transition layer is arranged between the feed waveguide and the glass-based medium mirror image waveguide. According to the design, on the premise of keeping high optical transparency, the total attenuation constant caused by traveling wave leakage loss and ITO ohmic loss is reduced by adjusting the thickness of the glass substrate, so that the aperture surface is effectively expanded, and the maximum end-on-fire gain is obtained. Due to the characteristics of light transparency and low profile, the aperture of the antenna can be integrated on the automobile sunroof, and the feed structure of the antenna can be integrated on the sunroof frame. The circulator is connected behind the antenna port to realize isolation of receiving and transmitting channels, during working, electromagnetic waves are fed into the antenna from the excitation port, and then echo signals are reflected and transmitted to a rear signal processor through the circulator. The system detects front obstacles by analyzing echo signals, and then initiative braking early warning is triggered to reduce the rear-end collision risk.

The invention relates to a glass-ceramic article (100) with a disc-shaped, transparent substrate (102) consisting of a glass-ceramic, wherein the substrate (102) has a first surface (110) as the usable side and a second surface (112) opposite the first surface (110) as the underside, wherein the substrate (102) has a transparency of at least 80%, wherein the substrate (102) exhibits a chromaticity shift of incident light of CIE standard illuminant D65 to α=0.05 to α=3 in transmission, wherein a reflective coating (114) with a reflectivity Rvis in the visible spectral range of more than 30%, preferably more than 40%, is applied to the second surface (112) of the substrate (102), wherein the coating (114) has at least three layers (104, 106, 108), wherein a first of the layers (104) that are closest to the second surface (112),a silicon-containing and / or aluminum-containing nitride layer or oxide layer or oxynitride layer with a thickness of 5 nm to 250 nm, a second layer (106) which is furthest apart in the coating (114) from the second surface (112), is a silicon-containing and / or aluminum-containing nitride layer or oxide layer or oxynitride layer, and a third layer (108) consisting of chromium or molybdenum arranged between the first layer (104) and the second layer (106).

A sensor window may include a substrate and a set of layers placed on the substrate. The set of layers may include a first subset of layers with a first refractive index and a second set of layers with a second refractive index different from the first. The set of layers may be associated with a threshold transmittance in a perceptible spectral range. The set of layers may be set to a particular color in a visible spectral range and may be associated with a threshold opacity in the visible spectral range.

The invention discloses a transparency detection device for new material film processing, and relates to the technical field of optical detection, the transparency detection device comprises a base, a detection assembly and an irradiation assembly, and two ends of the top of the base are provided with supporting seats. The light intensity of the light uniformizing plate penetrating through the transparent film can be detected in the first detection groove, and the light intensity directly irradiated by the light uniformizing plate can be detected in the second detection groove, so that the equipment can detect the transparency of the transparent film by comparing the intensity of the same light beam; the light intensity detected by the first photosensitive detector is lower than the light intensity detected by the second photosensitive detector, and the same light source is adopted for comparison detection in the design, so that the situation of uneven light intensity caused by various problems such as voltage, light source brightness and service life when double light sources are adopted for brightness comparison is avoided; and the situation of misjudgment caused by light intensity drop due to light source brightness and voltage when a single light source is adopted for detection can also be avoided.

The invention provides a water transparency detection method, liquid transparency detection is carried out by using a tubular-column-shaped container, the bottom of the tubular-column-shaped container is provided with a light-emitting sheet, the light-emitting sheet emits detection light, and the side wall of the tubular-column-shaped container is provided with a light shielding plate; pouring liquid to be detected into the tubular-column-shaped container to a specified height; a shading plate and a photosensitive sensor arranged on the shading plate are arranged at the top of the tubular-column-shaped container; the photosensitive sensor sets a basic illumination intensity detection threshold value; after detection is started, the liquid to be detected in the tubular-column-shaped container slowly flows out of the bottom of the tubular-column-shaped container, and when the photosensitive sensor senses the detection light with the illumination intensity being the same as the basic illumination intensity detection threshold value, the liquid to be detected in the tubular-column-shaped container slowly flows out of the bottom of the tubular-column-shaped container; reading the height value of the residual liquid to be detected in the tubular-column-shaped container at the moment, and calculating the transparency of the water body according to the relation between the height value and the transparency of the water body.