144 results about "Wavelength selectivity" patented technology

The invention is suitable for the technical field of filters, and particularly relates to a manufacturing method of a linear gradient filter and the linear gradient filter. The manufacturing method of the linear gradient filter comprises the following steps that a glass wafer serves as a substrate, and a lower reflecting layer is plated on the surface of the glass wafer; wherein the lower reflecting layer is formed by alternately stacking a plurality of layers of low-refractive-index materials and a plurality of layers of high-refractive-index materials; coating a resonant cavity layer on one side, far away from the glass wafer, of the lower reflecting layer through a stepped coating process; plating a reflecting layer on one side, far away from the glass wafer, of the resonant cavity layer; and plating a long-wave-pass layer on one side, far away from the glass wafer, of the upper reflecting layer and in an area larger than the central wavelength to obtain the linear gradient filter. Compared with the prior art, the linear gradient filter provided by the invention is better in spectral resolution in a long wave band, smaller in energy difference of channels, excellent in wavelength selection performance and capable of being applied to spectrum applications such as a miniaturized infrared spectrometer and the like.

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 discloses an LCOS optical illumination system for an AR-HUD projection unit, and belongs to the field of photoelectric illumination and display technologies. The system comprises an illumination light source, a collimating lens, a fly-eye lens, an optical diffuser, a wavelength selective light combination element, a polarized light conversion device, a relay lens, a PBS prism and an LCOS display chip. The illumination light source is a three-color LED light source and is composed of a red light LED, a green light LED and a blue light LED. After red primary light, green primary light and blue primary light are collimated by the collimation system, the light parallelism is optimized, the collimated light sequentially passes through the light diffusion element to optimize the light field uniformity and the fly-eye lens to eliminate the non-uniform illumination, then is unified into a single linear polarization state by the polarized light converter, is shaped by the relay system and keeps the light beam transmission quality, and finally is transmitted to the light source. And polarization state separation and light combination are realized through the PBS prism, and finally, the light is accurately coupled to the LCOS display chip, so that high-efficiency polarization state matching and imaging quality optimization are completed. According to the HUD-PGU system, the illumination brightness of the whole system is improved, the color reducibility of the system is improved, the illumination uniformity of system imaging is improved, the light energy utilization rate of the system is improved, meanwhile, the size of the HUD-PGU is reduced, and the manufacturing cost is reduced.

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 multi-unit wavelength selective switch (WSS) is disclosed. The WSS includes a plurality of WSS units, each WSS unit comprising a waveguide array for providing a light beam for propagation in the multi-unit WSS, and for receiving, in a wavelength-selective manner, the light beam propagated in the multi-unit WSS. A polarizing collimator splits each light beam into polarized collimated first and second sub-beams propagating in the multi-unit WSS along separate optical sub-paths. The polarized sub-beams of each light beam may be redirected by separate redirector arrays, e.g. liquid crystal on silicon (LCoS) arrays of a redirector array assembly specific to each light beam launched into the multi-unit WSS. Using separate redirector arrays to handle polarization sub-beams provides for a greater flexibility of optical configuration, allowing the use of inexpensive, off-the-shelf redirector arrays.

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 system for frequency conversion of laser pump radiation includes an optical element for frequency conversion of lasers or laser beams with power scalability. The element has a nonlinear birefringent, thin plate crystal. A pump beam generates frequency-shifted radiation. Phase or quasi-phase matching conditions are in the crystal between beams. Frontside and backside of the crystal have high-reflective and partially-reflective coatings, obtaining intensity enhancement of the pump and frequency-converted radiation, and maintaining relative phase delay between beams, maximizing conversion efficiency. The crystal contacts a heat sink through the high-reflective coating, minimizing temperature inhomogeneity in the crystal. Intrinsic longitudinal heat flow provides power scalability. The element, used intra-cavity, acts as a wavelength-selective component forcing laser operation on resonance of the element, maximizing frequency conversion. The wavelength selectivity allows single-frequency operation of high-power lasers with intra-cavity frequency conversion.

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 wavelength selective photoresponse strontium-based metal organic framework eutectic material as well as a preparation method and application thereof. A metal node of the material is strontium ions, N, N '-bis (5-isophthalic acid) naphthalimide is used as a ligand, anthracene and a derivative thereof are used as objects, N, N-dimethylformamide is used as a solvent, and the material is obtained through solvothermal reaction. The material is composed of an electron donor (D) and an electron acceptor (A), and is a strontium-based MOF eutectic with an infinitely extended pi stacked A-D-D-A configuration. The MOF eutectic material has lattice characteristics of a tetragonal crystal system, a space group is I 41 / a, and cell parameters are a = b = 28.42240 (10), c = 13.71600 (10), and alpha = beta = gamma = 90 degrees. Sr-NDI at An has unique wavelength selective photoresponse property: ultraviolet light triggers [4 + 4] dimerization of an object anthracene, red light excites [4 + 2] reaction of anthracene and singlet oxygen, and near-infrared light induces generation of free radicals.

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.

The present invention relates to a method for maintaining the synchronization of a Fourier domain mode locked (FDML) laser, wherein the FDML laser has at least one dispersion compensation resonator having at least one variable wavelength selective optical filter, wherein the laser propagates in the resonator at a round-trip propagation frequency, and the filter repeatedly changes in terms of its wavelength selectivity at a tuning rate, and wherein the FDML laser is synchronized when the tuning rate is an integer multiple of the round-trip propagation frequency, characterized in that the method has the following steps: a. coupling out at least a part of the laser from the resonator; b. detecting at least a part of the coupled-out laser by means of at least one photodetector; c. counting the offset in the signal of the photodetector during successive counting time intervals; d. adjusting the round-trip propagation frequency or the tuning rate such that the ratio of the count value to the length of the counting time interval remains within a predetermined desired value range.

The embodiment of the invention provides a two-dimensional flexible photoelectric detector and a manufacturing method thereof, and belongs to the technical field of photoelectric detectors. The two-dimensional flexible photoelectric detector comprises a flexible substrate; the infrared light absorption back gate layer is arranged on the flexible substrate and is used for responding to the infrared light and regulating and controlling the response state of the two-dimensional flexible photoelectric detector to light with different wavelengths according to the gate voltage; the dielectric layer and the gate electrode layer are arranged on the infrared light absorption back gate layer; the floating gate layer is arranged on the dielectric layer; the tunneling layer is arranged on the floating gate layer; the mixed-phase transition metal chalcogenide film layer is arranged on the tunneling layer and used for generating positive photoelectric response under irradiation of visible light, and current in the mixed-phase transition metal chalcogenide film layer can be regulated and controlled by voltage; and the two-dimensional semiconductor function layer is arranged on the mixed-phase transition metal chalcogenide film layer and is used for responding to visible light and enhancing short wave response. According to the invention, wavelength selective photoelectric detection can be carried out under an illumination condition.

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.