120 results about "Wavelength selectivity" patented technology

A photometric process measurement arrangement and a photometric measurement method The invention refers to a photometric process measurement arrangement (10) comprising a photometric immersion probe (20) comprising a photometer flashlight source (61) for providing photometric light impulses, a photometric detector arrangement (70) comprising a separate wavelength-selective detection element (71, 72, 73), and a photometer control (80) controlling the photometer flashlight source (61) and the detector arrangement (70), The photometer control (80) comprises: An impulse signal integrator (819, 829, 839) for integrating the electric impulses having the impulse intensity (Ui) generated by the detection element (71, 72, 73) of one impulse integration cycle (204; 221; 264), a measurement cycle control (90) for adapting the total number of 20 integrated cycle impulses of an impulse integration cycle (204;221;264) to the impulse intensity (Ui) of the single electric impulses, an A / D-converter (81, 82, 83) for converting the voltage of the impulse signal integrator (819, 829, 839) in an optional compulsory A / D conversion interval (100) after the impulse integration cycle (204;221;264), and an A / D-conversion management module (150) for balancing the total number of A / D conversion intervals (100-111) within a time frame (F), whereas the number of supplementary A / D conversion intervals (101-111) after the compulsory A / D conversion interval (100) depends on the length of the corresponding impulse integration cycle (204; 221; 264).

The invention refers to a photometric process measurement arrangement (10) with a photometric immersion probe (20). The photometric immersion probe (20) comprises a photometer flashlight source (61) for providing photometric light impulses, a photometric detector arrangement (70) comprising at least two separate wavelength-selective detection elements (71, 72, 73), and a photometer control (80) controlling the photometer flashlight source (61) and the detector arrangement (70). The photometer control (80) comprises several impulse signal integrators (819, 829, 839) for integrating the electric impulses generated by the detection elements (71, 72, 73), several A / D-converters (81, 82, 83) for converting the voltages of the impulse signal integrators (819, 829, 839) when high-precision-converting trigger ports (H) of the A / D-converters (81, 82, 83) are triggered, and a measuring cycle control (90) with an integration target memory (94) memorizing an integration target voltage value (Ut). The photometer control (80) is provided with a high-precision-request port (93) for synchronously triggering the high-precision-converting trigger ports (H) of all A / D-converters (81, 82, 83) after the voltage of the first of all impulse signal integrators (819, 829, 839) has exceeded the memorized integration target voltage value (Ut).

A system may include one or both of a light emitter and a light receiver, and an optical filter. The optical filter includes a wavelength selective scattering layer. The wavelength selective scattering layer may have a near-infrared scattering ratio of less than about 0.9. The filter may have a visible reflective haze ratio of greater than about 0.5. A method may include disposing the wavelength selective scattering layer adjacent one or both of the light emitter and the light receiver. The optical filter may include a wavelength selective reflective layer. The optical filter may include a wavelength selective absorbing layer. An article may include the optical filter. The wavelength selective scattering layer may have an average near-infrared scattering of less than 60%, an average visible scattering of greater than 10%, and a difference between the % total visible reflectance and the % diffuse visible reflectance of less than 20.

A display device may include a substrate, a light emitting structure on the substrate, a thin film encapsulation layer on the light emitting structure, a color filter layer on the thin film encapsulation layer and including a red color filter selectively transmitting a red light and a blue color filter selectively transmitting a blue light, and an overcoat layer, exhibiting two or more absorption wavelength bands and configured to provide wavelength-selective filtering including a green wavelength band, on the color filter layer and including at least one selected from a dye and a pigment, wherein an upper surface of the red color filter may be lower than an upper surface of the blue color filter.

A wavelength selective absorption filter contains a resin, a coloring agent, and a compound having at least one polar group of a carboxylic acid ester bond, a carboxylic acid amide bond, a sulfonic acid amide bond, a urethane bond, or a sulfonyl bond and a MW≤1,000 where dye includes at least one of dye A having a main absorption wavelength range at a wavelength of 390 to 440 nm and dye D having a main absorption wavelength range at a wavelength of 680 to 780 nm, a 20% value wavelength A with respect to an absorbance maximal value exhibited by a main absorption wavelength is 455 nm or less where dye A is contained, and a 20% value wavelength D with respect to the absorbance maximal value exhibited by the main absorption wavelength is 640 nm or more where dye D is contained, and a display device.

The invention discloses an optical fiber laser external cavity spectrum synthesis crosstalk elimination method, which relates to the technical field of laser, and comprises the following four steps of: firstly, designing and constructing a spectrum synthesis system model by taking a reflection-type volume Bragg grating (R-VBG) as a beam combiner, and blocking a crosstalk path through R-VBG wavelength selective transmission and diffraction and grid line vertical design; calculating an optimal grating parameter by combining R-VBG loss and diffraction efficiency correlation and multi-parameter internal relation; a steady-state rate equation is deduced based on a three-energy-level system, and a pumping threshold power change rule and an output characteristic expression are obtained; and finally analyzing the influence of light beam characteristics and thermal deformation on diffraction efficiency, determining a threshold value and controlling temperature, and verifying the system performance through experiments. The method can fundamentally eliminate crosstalk, guarantee the quality of the light beam, balance the cost and loss, adapt to a multi-channel scene, and have a remarkable application value in a multi-field high-power fiber laser.

The application provides an orbital angular momentum and wavelength dual multiplexing polarization sensitive zooming super lens based on an orbital angular momentum and wavelength dual multiplexing polarization sensitive zooming super lens, characterized in that the super lens is composed of a silicon dioxide substrate layer and a silicon elliptical nanometer column medium layer. Through an orbital angular momentum topological charge number orthogonality and wavelength selectivity dual multiplexing mechanism, combined with a polarization sensitive design, a geometric phase regulation mechanism, the silicon elliptical nanometer column array is optimized through size and rotation angle, 0-2pi full phase coverage is realized, different orbital angular momentum modes, different wavelengths and left-handed / right-handed circularly polarized incident light are precisely demultiplexed in a 400-700nm visible light band, multi-channel independent zooming can be realized, and the focusing efficiency is greater than or equal to 65%. The application solves the defects of single zooming function, limited channel capacity and poor polarization compatibility of the traditional super lens, has compact structure and high integration, and can be widely applied to the fields of miniature imaging systems, optical communication, holographic display and the like.

The invention discloses a non-contact handwriting device based on an ultraviolet specific image sensor and a preparation method, and relates to the technical field of image sensing and human-computer interaction. Comprising a glass substrate 1, a transparent thin film transistor array 2 formed on the substrate, a photosensitive material layer 3 formed on the thin film transistor array, and an ultraviolet curing adhesive packaging layer 4 covering the photosensitive material layer. A light-sensitive material is a Bi2S3 material with a wavelength selective light current memory characteristic, generates long-time light current maintenance based on a photo-thermal electric effect in an ultraviolet band, rapidly attenuates in visible to near-infrared bands, and has ultraviolet input selectivity and ambient light anti-interference capability. According to the system, an ultraviolet laser pen is used as an input tool, handwriting patterns which can be kept for a long time are formed on an image sensor array, and image erasing based on a background normalization mechanism is supported. The image sensor array is composed of synaptic-like devices, has a long-term optical memory characteristic, and realizes integration of perception and storage.

There is provided in one embodiment an apparatus having an image sensor array. In one embodiment, the image sensor array can include monochrome pixels and color sensitive pixels. The monochrome pixels can be pixels without wavelength selective color filter elements. The color sensitive pixels can include wavelength selective color filter elements.

The invention discloses an ionic elastomer photoelectric sensor based on triplet-triplet annihilation up-conversion and a preparation method of the ionic elastomer photoelectric sensor, and belongs to the technical field of functional materials and photoelectric sensing. The photosensitizer and the luminescence agent form a triplet state-triplet state annihilation up-conversion system. The preparation method comprises the following steps: respectively forming the ionic conductive phase and the optical active phase, mixing the ionic conductive phase and the optical active phase to form a homogeneous system, and curing and molding through photo-initiation polymerization. Under the optical excitation condition of a specific wave band, the ion elastomer can generate measurable electric signal output, so that conversion from an optical signal to an electric signal is realized. The flexible photoelectric sensor can be prepared by curing the material on the surface of an electrode, can work under the condition of no external bias voltage or low bias voltage, has the characteristics of good wavelength selectivity, excellent flexibility and stretchability and the like, and has an application prospect in the fields of wearable sensing and flexible electronics.

Provided are: a wavelength-selective absorption filter comprising a first wavelength-selective absorption layer that contains a transparent resin and a dye and a second wavelength-selective absorption layer that contains a transparent resin and a dye, wherein the dye contained in the first wavelength-selective absorption layer has a main absorption wavelength band in a wavelength range different from that of the dye contained in the second wavelength-selective absorption layer; and a display device comprising the wavelength-selective absorption filter.

To provide a wavelength-selective phase difference plate in which a difference between a phase difference generated when light is incident from a normal direction and a phase difference generated when light is incident from an oblique direction is small. The wavelength-selective phase difference plate has a plurality of wave plates, in which the wavelength-selective phase difference plate changes a phase of polarized light in a first wavelength region and does not change a phase of polarized light in a second wavelength region different from the first wavelength region, orientations of slow axes of the plurality of wave plates are different from each other, and Nz coefficients of the plurality of wave plates exceed 0.3 and are less than 0.7, respectively.

This invention discloses an underwater image enhancement method based on cross-knowledge embedding learning. It embeds three types of cross-knowledge—red channel knowledge, contrast knowledge, and gradient knowledge—of underwater images into a deep learning model. Guided by multiple knowledge bases, it improves the adaptability of the deep learning model to underwater optical scenes, comprehensively solves the problems of wavelength selective attenuation and forward and backward scattering in the underwater imaging process, and effectively improves the data quality of underwater images.

An optical component can include a substrate. The optical component can further include metasurface elements formed on a side of the substrate. Each metasurface element can provide a wavelength-selective filter, with at least two metasurface elements configured to filter different wavelengths. At least one of the metasurface elements can be comprised of a non-local metamaterial.

The invention relates to a system for determining cellular respiration and nutrient metabolism of living cells or tissues, the system comprising: a cell container configured to receive and maintain a biological sample; a gas volume in fluid communication with the cell container, the gas volume containing gaseous components produced by metabolic activity of the biological sample; an optical detection unit configured to detect a target gas species in the gas volume by wavelength-selective absorption spectroscopy, the optical detection unit being further configured to distinguish between different isotopic species of the target gas species, the optical detection unit comprising an illumination source and detector arrangement optically coupled to the optical detection unit and configured for measurement of absorption signals corresponding to different isotopes of the target gas species; and an electronic control and evaluation unit operatively connected to the optical detection unit, the electronic control and evaluation unit being configured to acquire and process absorption data, determine absolute values and / or temporal variations of the target gas species concentration and isotopic composition, and output respiration-related parameters of the biological sample. In this way, a system is provided that enables precise and efficient determination of carbon dioxide produced by living cells or tissues under physiological conditions.

The invention concerns a hybrid optical device combining a silicon-on-insulator (SOI) waveguide platform (1) comprising a silicon waveguide (1a) with a thin-film electro-optical (EO) material such as lithium niobate or barium titanate forming a waveguide structure (2). The EO material waveguide structure (2) is bonded in optical contact with the SOI waveguide (1a), and electrodes (6) on its sides enable refractive index modulation via the electro-optical material Pockels effect. A coupling section (7), preferably comprising a tapered SOI waveguide (7a), transfers light between the SOI and EO structures with low loss. The device may include Bragg gratings (4a) or periodically poled sections (4b) in the EO layer for tunable or wavelength-selective modulation. The structure allows fast, reconfigurable light modulation, filtering, and signal routing on a CMOS-compatible platform, suitable for high-speed communication, optical computing, and sensing, offering a compact and efficient electro-optic integration solution.

The present application relates to a kind of multi-wavelength surface plasmon hot electron photodetector and its preparation method and application, its structure includes substrate, two-dimensional material layer, vanadium dioxide micro-nano structure, graphene layer and top driving electrode.The detector realized by the present application not only has the characteristics such as wide spectrum, real-time tuning, room temperature operation and wavelength selectivity, and the detection performance is significantly improved.

An exemplary holographic metasurface lithography system and method that project a hologram having two or more different wavelengths of light onto a hybrid resin to simultaneously or concurrently cure / form both (i) a first material structure, e.g., a metal structure and (ii) a second material structure, e.g., a polymer structure, from the hybrid resin in the same three-dimensional space. The hologram is generated by a metasurface mask that encodes spatial information for both the metal structure and the polymer structure, and the resin has both (i) UV-sensitive metal precursors to form the metal structure and (ii) monomers, crosslinkers, wavelength-selective photosystems to form the polymer structure.

The application belongs to the technical field of wavelength selective radiators, and particularly relates to a wavelength selective radiator for a thermophotovoltaic system and a preparation method thereof. 12 The wavelength selective radiator for the thermophotovoltaic system is prepared by weighing Er2O3 and excess Al2O3 powders respectively, mixing, powdering, blank making, glue discharging, sintering, annealing and grinding. The wavelength selective radiator for the thermophotovoltaic system has high directional transparency, and the whole body can output effective photons that can be utilized, so that the whole material thermal excitation emission of millimeter level thickness is realized. The space volume utilization rate and radiation efficiency of the radiator are high, and the blocky ceramic device has a dense and fine microstructure, good integrity and thermal stability, and meets the long-term high-temperature use requirement.

This invention discloses a filter coating composition for fluorescence detection and its preparation method, relating to the fields of optical materials and biodetection technology. The composition is formulated by compounding optical functional powders, polymer substrates, dispersants, and additives in specific proportions, exhibiting high transmittance, narrow wavelength selectivity, excellent weather resistance and mechanical stability. It can accurately filter excitation light and stray light, improving the sensitivity and specificity of fluorescence detection. The filter coating composition and its preparation method for fluorescence detection also provide a simple, cost-effective manufacturing process suitable for large-scale production, particularly applicable to gene sequencing and immunochemistry. It addresses the problems of poor wavelength selectivity, weak stability, and high cost associated with traditional filters, making it suitable for fluorescence detection scenarios such as Alzheimer's disease biomarkers. Balancing accuracy, stability, and economy, it has broad application prospects in the field of in vitro diagnostic reagents.

A solid-state imaging device according to one embodiment of the present disclosure includes a plurality of photoelectric conversion sections stacked on a semiconductor substrate and having different wavelength selectivity from each other, and a wiring formed on the semiconductor substrate and electrically connected to the plurality of photoelectric conversion sections. Each of the photoelectric conversion sections includes a photoelectric conversion film, and a first electrode and a second electrode disposed across the photoelectric conversion film. The wiring extends in a normal direction of the semiconductor substrate, and includes a vertical wiring formed in contact with the second electrode of each of the photoelectric conversion sections.

Embodiments of the present application relate to an optical inspection method, an optical inspection program, a processing device, and an optical inspection device. Provided are an optical inspection method, an optical inspection program, a processing device, and an optical inspection device capable of inspecting a surface state of an object. According to the embodiments, the optical inspection method of the surface state of the object includes: acquiring a color vector of a color corresponding to a wavelength by using optical imaging using a wavelength selection section that selectively passes the wavelength from a surface of the object, in an n-dimensional color coordinate system that is the same as or less than a number of color channels of each pixel of an image sensor; and discriminating the surface state of the object according to a direction of the color vector in the color coordinate system.

The invention discloses a decoupling cooperative enhancement method for an underwater image degradation factor, and belongs to the technical field of underwater image enhancement. Aiming at the problem that an underwater imaging environment is complex and changeable, and light propagation is influenced by wavelength selective absorption and suspended particle scattering to cause image degradation, a degradation factor is approximately decomposed into relatively independent scattering degradation and color cast degradation, and a binarization strategy is introduced to compress the storage and calculation amount of data, so that the image degradation is realized. And global information is compensated in back propagation through decoupling learning, and data compression precision loss is recovered. According to the decoupling collaborative optimization method, scattering and color problems are distributed to a physical compensation module and a spectrum compensation module, learning information is isolated through a gating mechanism, and degeneration decoupling is achieved; the loss function is combined with the subtasks and the global loss to compensate the binarization precision loss of the submodules, and finally, the modules are cascaded to process and recover the degraded image.

The application provides a video image fast clipping and dimension reduction method and system based on a hierarchical bounding box, applied to the technical field of image processing, wherein the method collects multi-view dynamic scene point cloud data, and then divides the space by using a hierarchical bounding box to establish a bounding box structure with density characteristics; subsequently, optical diffraction array pre-filtering is used, and point clouds are separated based on wavelength selectivity and density distribution to generate a first subset and a background subset; then, adaptive pulse code modulation is used on nodes in the first subset to obtain high-precision data, and nodes in the second subset are compressed into low-code-rate data by using run-length encoding; subsequently, the two types of data are input into an improved k-d tree based on the spatial relationship of the bounding box to generate a two-dimensional point set representing key features, and a spatial index is constructed to realize real-time scene retrieval. The application can realize image dimension reduction while retaining key geometric features of the image, thereby improving efficient real-time spatial retrieval in a dynamic scene.

A system and method are provided for spectral shaping of light from a broadband source including multiple wavelengths. The system includes a beam splitter (BS) to receive and transmit an input beam, a dispersive element to disperse the input beam into dispersed beams separated by wavelength, and optic-elements to direct the dispersed beams onto a spatial light modulator (SLM). The SLM selectively modulates the dispersed beams reflected from the SLM, and the optic elements transmit a 0th-order of the reflected light through the dispersive element, which recombines the beams to form a reflected beam directed toward the BS. The BS separates the reflected beam from the input beam and directs it to an optical output of the system. The SLM includes multiple electrostatically deflectable reflective ribbons suspended over a reflective surface of a substrate, wherein the ribbons are separated by a distance equal to a width of the ribbons.

The invention relates to a test device (1) and a method for detecting a surface defect on an inner surface (2) of a hollow cylinder (3). The test device (1) comprises a light-generating unit (6) arranged on a probe (4) for projecting a light field ring (15) onto the inner surface (2). Light of different wavelengths and from different angles (α1, α2, α3) is emitted by means of three light-generating rings (6a, 6b, 6c) of the light-generating unit (6). An image sensor (8) has three sensors (23, 24, 25) for wavelength-selective detection of the light generated by the light-generating unit (6).A mirror unit (20) is arranged such that reflected light (21) from the light field ring (15) is directed onto the image sensor (8), and an evaluation unit (26) is configured to simultaneously create three wavelength-selective digital images from the sensor signals of the sensors (23, 24, 25) based on the reflected light (21) received by means of the image sensor (8) and to execute a shape-from-shading algorithm based on these images in order to uniquely identify a depression in the inner surface (2) that forms a surface defect and to uniquely distinguish it from a surface anomaly in the inner surface (2) that does not form a surface defect.

Provided is an optical filter including: a matrix including an inorganic substance having a water solubility of 0.4 g / 100 g-H2O or less; and a wavelength selective absorption material dispersed in the matrix. The optical filter absorbs an optical component having a wavelength of any band in a target wavelength band of 0.8 to 20 μm. A temperature at which a mass reduction rate of the wavelength selective absorption material is 10% by mass when heated in air from 100° C. at a rate of 10° C. / min is 900° C. or less. An apparent density of the optical filter relative to a true density of the matrix is 70% or more. In the target wavelength band, a wavelength bandwidth where a linear transmittance per 1 mm thickness of the optical filter is 30% or more is 50 nm or more.

The present disclosure provides a retroreflective article. The retroreflective article includes a retroreflective layer including a number of cube corner elements that collectively form a structured surface that is opposite a major surface, and a conformal wavelength-selective radiation absorbing coating layer adjacent to the structured surface. The present disclosure also provides a method of making a retroreflective article. The method includes obtaining a retroreflective layer, and forming a conformal wavelength-selective radiation absorbing coating layer on the retroreflective layer by applying a first material having a first binding group to the structured surface, and applying a second material having a second binding group to the first material. The conformal wavelength-selective radiation absorbing coating layer absorbs radiation of at least one selected wavelength and can impart color (or absorption of at least one wavelength outside of the colored wavelength range) to retroreflective light of the retroreflective article.

The application provides a wavelength multiplexing filtering isolation communication method, device and medium, and relates to the technical field of communication. The method comprises the following steps: adjusting a current filtering receiving parameter of a wavelength selective optical filter according to a specified wavelength dynamically allocated; the wavelength selective optical filter receives a wavelength multiplexing optical signal through the current filtering receiving parameter, so as to obtain a current filtering receiving optical signal from the wavelength multiplexing optical signal, and the wavelength multiplexing optical signal is composed of the specified wavelength optical signal through dynamic routing; obtaining a wavelength deviation between a current main wavelength of the current filtering receiving optical signal and the specified wavelength, and compensating the current filtering receiving optical signal according to the wavelength deviation to obtain the specified wavelength optical signal. The application saves resources through wavelength multiplexing, obtains accurate signals through filtering compensation, and enhances signal safety through dynamic allocation of the specified wavelength and dynamic routing.

The embodiment of the present application provides a frequency-sweeping laser, a control method thereof and an optical coherence tomography system. The frequency-sweeping laser comprises: a light beam generating component configured to emit a first light beam; an acousto-optic deflector comprising an ultrasonic wave generating element and a crystal, the crystal comprising a first surface and a second surface, the first surface configured to receive the first light beam; the ultrasonic wave generating element configured to transmit a first ultrasonic wave signal to the crystal, the first ultrasonic wave signal being a first nonlinear chirp signal; under the drive of the first nonlinear chirp signal, a medium in the crystal forms a grating varying with the frequency of the first nonlinear chirp signal, so that the first light beam is diffracted to obtain a first-order diffracted light, the first-order diffracted light being emitted from the second surface; and a wavelength-selective reflecting element configured to reflect the first-order diffracted light back to the second surface, a first sub-diffracted light returning to the light beam generating component through the grating and the first surface. The embodiment of the present application can reduce the calculation time of the OCT imaging process and improve the OCT imaging speed.