23 results about "Wavelength selectivity" patented technology

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.

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 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.

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.

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.

This application discloses a display module and a display device. The display module includes a first display unit, a second display unit, and a wavelength-selective color combining element. The first display unit outputs first light with a first center wavelength; the second display unit outputs second light with a second center wavelength; the wavelength-selective color combining element is disposed in the output light path of the first light and the second light, and is used to combine the first light and the second light into a single output light; wherein, the wavelength-selective color combining element includes a first reflective film, which is configured to reflect the first light and transmit the second light, or to reflect the second light and transmit the first light. This application can improve the performance of the display module.

This invention relates to optical switch network chips, specifically to an optical switch network chip with multi-wavelength routing capabilities and an optical signal routing method, to address the shortcomings of existing wavelength-routing optical switching network schemes, such as system complexity, large chip area, and crosstalk superposition. The optical switch network chip of this invention with multi-wavelength routing capabilities is used to realize the routing and switching of multi-wavelength optical signals. It includes an input port, an output port, multiple wavelength-routing optical switch units sequentially arranged between the input and output ports, and multiple waveguide interconnect networks connecting adjacent wavelength-routing optical switch units. Each wavelength-routing optical switch unit includes multiple wavelength-selective optical switches for wavelength selection and output, ultimately enabling optical signals input at any input port to alternately pass through multiple wavelength-routing optical switch units and multiple waveguide interconnect networks, and be routed to any output port.

This invention discloses an electrically programmable mercury cadmium telluride (HgCd) wavelength-selective detector based on a spatial bandgap gradient. The Hg / Cd composition of the absorption layer varies with thickness, allowing the bandgap to be adjusted with depth. Deeper layers have a larger bandgap, absorbing only shorter wavelengths; shallower layers have a smaller bandgap, preferentially absorbing longer infrared wavelengths. By adjusting the applied bias voltage, the positions of the depletion and multiplication regions within the absorption region can be controlled in real time, enabling programmable extraction of photocurrents at different wavelengths within a single-image device. Compared to traditional spectral systems relying on mechanical dispersive or filter arrays, this invention features a compact structure, requires no mechanical components, and offers advantages such as high-speed response and array-based design.

This invention relates to the field of mineral conveying technology, and more particularly to a machine vision-based system for detecting and separating impurities in quartz glass raw materials. The system employs a data acquisition module to obtain image datasets of the quartz glass raw materials and synchronous environmental parameters. A raw material feature extraction module extracts particle size distribution and transmittance characteristics to determine the raw material's feature values. A raw material feature classification module classifies the raw materials into coarse-grained, high-transmittance or fine-grained, low-transmittance types based on the feature values, synchronous environmental parameters, and classification thresholds. An active optical modulation module applies polarization-modulated light or wavelength-selective modulation light based on the raw material type. A modulation analysis and processing module acquires the modulated light image, analyzes it, and outputs impurity information and early warnings. This invention achieves adaptive selection of optical modulation strategies based on the particle size and transmittance characteristics of the raw materials, overcoming the problem of missed detection caused by optical interference, improving the accuracy of impurity detection and system adaptability, and meeting the technical requirements for continuous and stable production of high-purity quartz sand.

The application belongs to the field of micro-nano photonics and infrared sensing, and relates to an infrared broadband absorption metasurface structure. A structure of metal layer-dielectric layer-metal layer is adopted, the upper and lower metal layers adopt platinum, the dielectric layer uses traditional material silicon, and array arrangement is realized by combining different size sub-units, an infrared broadband absorption metasurface based on a square bevel structure is designed, and an average absorption rate of more than 60% in the 8-13um atmospheric window band is realized. The bottom metal and the dielectric layer are uniform layer structures, and the top metal layer adopts a square bevel of one angle, the ratio of the bevel to the square side length is related to the absorption wavelength. The application regulates the light field based on micro-nano structure parameter change, has good wavelength selectivity and modulation performance, the selected material has good chemical stability, and has practicability and process compatibility.

The application provides a wide tuning narrow line width semiconductor laser, characterized by comprising: an optical gain module for providing a tunable light wave; an optical coupling module for coupling the light wave; and an external cavity resonance module for adjusting the coupled light wave to obtain a narrow line width output light. The application provides a wide tuning narrow line width semiconductor laser which utilizes Fano resonance between a micro-ring resonator and a U-shaped waveguide and vernier scale effect between micro-ring resonators to realize a tuning function, and utilizes a Mach-Zehnder interferometer to suppress side modes in a transmission spectrum of the micro-ring resonator, thereby improving wavelength selectivity. The application realizes narrow line width, frequency stability and wide spectrum range of the output laser.

The application provides a wavelength-selective infrared emitter device controlled by ultrafast laser and voltage, which comprises a first phase change material layer, a dielectric layer, a second phase change material layer, a metal reflection layer, a silicon substrate and a conductive layer from top to bottom; by means of layered superposition design of nonvolatile phase change material and volatile phase change material, surface micro-nano structure control and optical resonant cavity control are spatially separated, so that structure reconstruction and cavity length conversion bear different spectral control tasks respectively, thereby breaking through the problem that the control freedom degree of single phase change material is limited; that is to say, the application adopts ultrafast laser to perform local phase change control on the first phase change material layer, so as to realize writing or erasing of a surface periodic grating structure, and by means of applying voltage, the second phase change material layer is subjected to phase transition, so as to adjust the equivalent optical cavity length of the Fabry-Perot cavity, and finally the spectral shaping ability and control flexibility are improved, and wavelength-selective control can be realized.

Provided is a radiative cooling substrate, sequentially composed of a broadband radiation absorption layer, a metal substrate, and a wavelength-selective infrared emission layer. Also provided is a method for preparing the aforementioned radiative cooling substrate, which simply involves placing the metal substrate into an electrophoresis tank and depositing the broadband radiation absorption layer and the wavelength-selective infrared emission layer on the two sides of the metal substrate, respectively. Additionally, a radiative cooling device, comprising the above-mentioned radiative cooling substrate, is also provided.

An optical signal transmitter (AXEL) in which a quality of an optical signal waveform is maintained includes a distributed Bragg reflector to be coupled with an emission end surface of an SOA in an optical circuit unit including an optical waveguide core portion formed on an upper surface of a substrate. In the optical circuit unit, a diffraction grating formed on an upper surface side opposite to an absorption layer of an EA optical modulator and a diffraction grating formed on an upper surface side of a reflection layer of the distributed Bragg reflector have a wavelength selectivity.

The application discloses a kind of mixing light module and passive optical network system, mixing light module includes shell assembly, light emitting receiving component being arranged in shell assembly, light emitting receiving component is equipped with optical port and lens, and is integrated with emitting unit and receiving unit.Emitting unit includes multiple laser assembly and wave combining component, and multiple optical signals are output from optical port after wave combining.Receiving unit includes wave separating optical separating component, first detection component and second detection component, wave separating optical separating component receives mixed frequency optical signal input from optical port, first, receive waveband and emission waveband are separated, then the optical signal of receive waveband is divided into first light beam and second light beam according to optical power, and first light beam and second light beam are respectively incident to two detection components in opposite directions.The application solves the technical problem that multiple system PON uplink signal cannot be independently separated by wavelength selective filter due to wavelength overlap by receiving mode of first wave separation and then light separation.

The present application provides an optical side input / output circuit and an optical connector which have wavelength selectivity and are easily configured at multiple points in a transmission path. An optical side input / output circuit (301) includes a tapping section (10) in which a tapping waveguide (53) is formed, the tapping waveguide (53) outputting light of a high-order mode from a side surface of an optical fiber (50) from among light propagating in a core (51) of the optical fiber (50), and a grating section (20) located in front of the tapping section (10) in a propagation direction of the light, the grating section (20) having a grating (21) formed on the core (51) of the optical fiber (50), the grating (21) converting light of a desired wavelength from a fundamental mode into the light of the high-order mode.

The purpose of the present invention is to provide a horticultural and agricultural facility which utilizes a wavelength-selective organic solar cell and in which it is possible to achieve both power generation and crop growth. Disclosed, as one embodiment of the present invention, is a horticultural and agricultural facility characterized in that the exterior of the horticultural and agricultural facility is covered by or a roof portion or a wall portion of the horticultural and agricultural facility is constructed by a wavelength-selective organic solar cell module including a photovoltaic layer having an SG value of at least 0.3 as calculated from equation 1 in a transmission spectrum, or the interior of the horticultural and agricultural facility is covered by and 10-100% of the total area of the roof portion and the wall portion is occupied by the wavelength-selective organic solar cell module. (In the equation, symbols are as defined in the specification.)

A metrology system and method for imaging samples such as semiconductor devices having metrology targets for measuring overlay. In embodiments, the system includes an illumination source configured to generate a multiwavelength illumination beam, collection channels for collecting wavelength-selective collected light from the sample in accordance with a metrology recipe, and a controller configured to receive wavelength-selective datasets and determine at least one overlay measurement from the wavelength-selective datasets received.

This invention discloses a bismuth ferrite / bismuth vanadate photo-Fenton catalyst, its preparation method, and a wastewater treatment device, belonging to the field of wastewater treatment technology. This invention prepares the bismuth ferrite / bismuth vanadate photo-Fenton catalyst via a sol-gel method, which can solve the problem of Fe in traditional Fenton technology. 3+ / Fe 2+ In addition to addressing the technical problem of cyclic obstruction, the photo-Fenton catalyst of this invention has the characteristic of wavelength-selective degradation, which can generate different active species under light conditions with wavelengths <450nm and wavelengths >600nm respectively, thereby achieving segmented and efficient removal of different types of pesticides such as imidacloprid, paraquat, carbofuran, and methomyl from wastewater.

The present disclosure provides a compact fingerprint and finger vein combined scanner comprising a cemented prism pair (1') with first prism block (3) and second prism block (2), selective interference coating (7) between the prism blocks that transmits red wavelength light and reflects near-infrared wavelength light at different incidence angles, red LED (4) illuminating finger placement surface (6) on the first prism block (3), at least one near-infrared LED (5) illuminating the finger placement surface (6), imaging lens system (8) comprising First imaging lens (8a) and Second imaging lens (8b) arranged in sequence receiving light from the cemented prism pair (1'), aperture filter (9) between the imaging lens system (8) and imaging detector (10) with wavelength-selective filter transmitting red wavelength light and absorbing near-infrared wavelength light and central opening transmitting both wavelengths, and two-dimensional imaging detector (10) receiving light through the imaging lens system (8) and aperture filter (9).

The application discloses a white light interference detection and multiplexing system and method with a flying strain resolution order of magnitude, utilizes the feature that the coherence length of white light is small, adjusts the fiber delay parameter, makes the multiple reflection light in the fiber grating group and the first reflection light perform heterodyne interference, realizes the effect of improving the system phase change and sensitivity, simultaneously adds the interferometer, demodulates the low-order interference light result as the reference of the high-order interference light, reduces the overall noise floor of the system, and finally fully utilizes the advantages of the white light spectrum width and the wavelength selectivity of the fiber grating, realizes the multiplexing, high resolution and low cost large-scale array sensing on one or more optical fibers.

This invention discloses a mid-infrared narrow-linewidth fiber laser based on microsphere feedback and a method for laser output, relating to the field of mid-infrared laser technology. The mid-infrared narrow-linewidth fiber laser includes Er... 3+ / Yb 3+ Co-doped low-hydroxyl fluorotellurate glass optical fiber, pump light source, multilayer dielectric film and passive fluorotellurate glass microspheres, Er 3+ / Yb 3+ The co-doped low-hydroxyl fluorotellurate glass fiber has a tapered region, and passive fluorotellurate glass microspheres achieve wavelength-selective feedback of the whispering-gallery mode through evanescent field coupling. This invention can output a narrow linewidth laser of 2.7 μm, which is extended to the 3-5 μm band through stimulated Raman scattering. This invention has advantages such as narrow linewidth, high stability, precise coupling, and good integration, and is suitable for applications such as environmental monitoring, biomedicine, and high-precision spectroscopic detection.