72 results about "Emission band" patented technology

The invention relates to the technical field of component analysis, in particular to an intermediate infrared spectrometer sensor verification system which comprises the following steps: acquiring spatial distribution information of a target sample through an automatic sampling module, and generating a corresponding first feature group based on the spatial distribution information; adjusting an emission wave band and a modulation strategy corresponding to a mid-infrared light source, converting mid-infrared photons into visible light signals, and generating a corresponding second feature group; performing down-sampling processing on the original spectral data to generate a corresponding third feature group; inputting the sparse spectral coefficient into a pre-trained deep learning reconstruction model, and dynamically correcting the reconstruction process in combination with an environment temperature compensation parameter to generate reconstructed spectral data corresponding to high resolution; and analyzing the reconstructed spectrum data, matching a preset substance spectrum database, extracting a characteristic absorption peak position and an intensity ratio of the target substance, and generating a corresponding final analysis result. According to the invention, the intelligence of the sensor verification system can be improved.

For example, a transmitter, e.g., for a wireless communication device, may be configured to transmit a wideband Radio Frequency (RF) Transmit (Tx) signal having a wide bandwidth of at least 80 Megahertz (MHz). For example, the transmitter may be configured to generate the wideband RF Tx signal having the wide bandwidth based on a baseband signal. The transmitter may be configured to generate the wideband RF Tx signal including a suppressed third harmonic and a suppressed fifth harmonic.

The invention belongs to the technical field of temperature sensors, and particularly relates to an up-conversion luminescence temperature sensor based on a plasmon effect and preparation and application thereof. The core of the sensor provided by the invention is a composite structure formed by a gold nanorod array and Er < 3 + > and Yb < 3 + > co-doped NaYF4 up-conversion nanoparticles, and the gold nanorod array is prepared by adopting a two-way aluminum oxide template method and is regularly and orderly arranged in a hexagonal shape. Under the excitation of 980nm near-infrared light, the local surface plasmon resonance effect of the gold nanorods can significantly improve the up-conversion luminescence intensity and accelerate the thermal response rate of the sensor; the ratio type temperature sensing system is constructed by detecting the fluorescence intensity ratio of two emission bands of 515-535 nm and 535-555 nm, self-calibration accurate detection within the temperature range of 303-348 K can be achieved, and the sensor has the advantages of being uniform in structure, controllable in preparation, high in detection sensitivity, high in response speed and the like.

The invention provides self-recovery chromium ion doped oxide mechanoluminescence fluorescent powder as well as a preparation method and application thereof. The chemical general formula of the self-recovery mechanoluminescence fluorescent powder is Al2 (1-x) O3: 2xCr < 3 + >, wherein x is equal to 0.3%-5%. The preparation method of the self-recovery mechanoluminescence fluorescent powder comprises the following steps: a, respectively weighing aluminum oxide and chromium oxide according to the molar ratio of each element in the chemical general formula Al2 (1-x) O3: 2xCr < 3 + >; b, grinding and uniformly mixing the weighed raw materials, and firing in air at the temperature of 1300 DEG C for 6 hours; and c, taking out the fired sample, and uniformly grinding to obtain the chromium ion doped oxide mechanoluminescence fluorescent powder. According to the chromium ion doped oxide mechanoluminescence fluorescent powder disclosed by the invention, a measured emission band main peak is located at 694 nm and is located at a biological first window (600-900 nm), and the chromium ion doped oxide mechanoluminescence fluorescent powder is expected to be used as a near-infrared mechanoluminescence biological probe; and the fluorescent powder has the advantages of no need of pre-irradiation and instant self-recovery of luminescence.

The invention discloses a gesture recognition control method and system for a range hood and the range hood. According to the gesture recognition control method for the range hood, two sets of infrared geminate transistor sensors are controlled to emit infrared emission signals with preset coding values in a synchronous period; acquiring the signal intensity, the signal coding matching degree and the receiving time interval of two groups of corresponding infrared receiving signals after the two groups of infrared sending signals are reflected, judging whether an effective gesture judgment condition is met or not based on the signal intensity, the signal coding matching degree and the receiving time interval, and when the effective gesture judgment condition is met, executing the step 2; if yes, the gestures currently detected by the two sets of infrared geminate transistor sensors are determined to be effective gestures, and the range hood is controlled to execute control actions corresponding to the control instructions based on the control instructions corresponding to the effective gestures; coding verification, intensity verification and sequential logic-based dual-channel correlation judgment are carried out on the two groups of infrared receiving signals, so that efficient, reliable and high-interference-resistance non-contact waving action recognition can be ensured.

The present invention provides an antimony-based organic-inorganic hybrid metal halide luminescent material and a preparation method thereof, which is applicable to the photoelectric field. The present invention uses 2-methylpiperazine as an organic ligand to synthesize a luminescent material with the chemical formula (C5H 14 N2)SbCl5 luminescent material, where C5H 14 N2 represents the cationic form of 2-methylpiperazine. The excitation wavelength range of this material is 250 to 400 nanometers, while its emission wavelength covers 450 to 850 nanometers, with the main emission peak at approximately 600 to 650 nanometers. The preparation method of the present invention is characterized by a simple process, low cost, and suitability for large-scale production. In addition, the luminescent material exhibits wide excitation and emission bandwidths and has high luminous efficiency. It can be widely used in the manufacture of light-emitting devices, as well as in applications such as phosphors, spectrum conversion, and display lighting.

The present invention provides a light generation system configured to provide system light; wherein the light generation system includes (i) a first light generating device, (ii) a second light generating device, and (iii) a light-emitting material device; wherein: (A) the first light generating device includes a first solid-state light source, the first solid-state light source being configured to generate first light source light having a wavelength selected from the wavelength range of 430-490 nm; wherein the first light generating device is configured to generate first device light; (B) the light-emitting material device includes a first light-emitting material, the first light-emitting material being disposed downstream of the first light source and configured to convert at least a portion of the first light source light received by the first light-emitting material into first light-emitting material light having a first spectral power distribution in the visible wavelength range, the first spectral power distribution having a first centroid wavelength (λc1); wherein the first centroid wavelength (λc1) is selected from the wavelength range of 615-645 nm; wherein the first light-emitting material light includes one or more emission bands having a first full width at half maximum (FWHM1), the first... The full width at half maximum (FWHM2) is selected from a range up to 40 nm; wherein the first luminescent material comprises a luminescent material of the type doped with tetravalent manganese, wherein M comprises an alkaline earth cation, wherein M' comprises a basic cation, and x is in the range of 0-1, wherein A comprises a tetravalent cation, wherein X comprises a monovalent anion, and at least fluorine; (C) the second light generating device comprises a second solid-state light source; wherein the second light generating device is configured to generate second device light having a second spectral power distribution in the visible wavelength range, the second spectral power distribution having an emission band having (a) a second centroid wavelength (λc2) selected from a wavelength range of 605-655 nm, and (b) a second full width at half maximum (FWHM2) selected from a range up to 40 nm; and (D) the light generating system is configured such that (a) the first spectral power distribution and the second spectral power distribution at least partially overlap, (b); and (c) in the operating mode of the light generating system, the system light comprises (i) the first luminescent material light and (ii) the second device light.

This disclosure provides a planar resonant cavity for a planar gyrotron and a method for increasing its output power, relating to the field of microwave technology. The planar resonant cavity includes: a resonant cavity for increasing the energy of electromagnetic waves; wherein the energy of the electromagnetic waves gradually increases based on the interaction between the electron beam and the electromagnetic wave; electron emitting surfaces, respectively disposed at the upper and lower ends of the cavity surface in the negative Z direction, for emitting electron beams; wherein the electron emitting surfaces at the upper and lower ends of the cavity surface are symmetrical based on both the central YZ plane and the central XZ plane of the resonant cavity; and baffles, including a left baffle and a right baffle, the left and right baffles having identical structures, respectively disposed in the X direction of the resonant cavity between the electron emitting surfaces and the two ends of the resonant cavity, for reflecting electromagnetic waves to enhance the interaction between the electron beam and the wave, increase the energy of the electromagnetic waves, and increase the output power of the electromagnetic waves.

The present invention is applicable to the technical field of fluorescent materials and provides a broadband near-infrared sulfide luminescent material excited by blue light. The chemical formula of the luminescent material is SrSc 2‑2x Cr x S4, wherein 0.0025≤x≤0.015. The present invention also provides a method for preparing a broadband near-infrared sulfide luminescent material excited by blue light. The present invention also provides an application of a broadband near-infrared sulfide luminescent material excited by blue light. 3+ Cr 3+ Ion substitution, with Cr 3+ Ion substitution of Sc 3+ The emission intensity of the ions changes accordingly and can be effectively excited by blue light. The optimal emission wavelength is at 1030nm, which is derived from Cr 3+ of 4 T2→ 4 The electronic transition of A2 produces high-efficiency near-infrared broadband emission with a half-width of 225nm under 468nm blue light excitation; the raw material resources used are abundant, the preparation method is simple and easy, the physicochemical stability is good, the fluorescence lifetime is ideal, it is green and pollution-free, and it has strong applicability. In addition, the emission bandwidth and emission wavelength are long, and it can be widely used in the field of near-infrared spectroscopy technology.

The invention provides a light generating system (1000) comprising a first light generating device (110) and a control system (300), wherein the first light generating device (110) comprises a first solid state light source (10), a second solid state light source (20), and a luminescent converter (2000), wherein: (A) the first solid state light source (10) is configured to generate first light source light (11) having a first peak wavelength (λp1) selected from the range of 400-490 nm; (B) the second solid state light source (20) is configured to generate second light source light (21) having a second peak wavelength (λp2) selected from the range of 470-540 nm; wherein λp2 - λp1 ≥ 20 nm; (C) the luminescent converter (2000) is configured in a light receiving relationship with the first and second solid state light source (10,20); wherein the luminescent converter (2000) comprises a first luminescent material (210) and a second luminescent material (220); (D) the first luminescent material (210) comprises a luminescent material of the type M'xM2-2xAX6 doped with tetravalent manganese, wherein M' comprises an alkaline earth cation, M comprises a monovalent cation, and x is in the range of 0-1, wherein A comprises a tetravalent cation, wherein X comprises a monovalent anion, at least comprising fluorine; wherein the first luminescent material (210) is configured to convert at least part of the first light source light (11) received by the first luminescent material (210) into first luminescent material light (211); (E) the second luminescent material (220) is configured to convert at least part of the second light source light (21) received by the second luminescent material (220) into second luminescent material light (221); wherein the second luminescent material light (221) has a second centroid wavelength (λc2) selected from the range of 600-660 nm; wherein the second luminescent material light (221) comprises at least one emission band having a second full width at half maximum FWHM2 of ≥ 40 nm; (F) the first light generating device (110) is configured to generate first device light (111); wherein in an operational mode of the first light generating device (110), the first device light (111) comprises one or more of the first luminescent material light (211) and the second luminescent material light (221); wherein the first device light (111) has a first device centroid wavelength (λcd1) selected from the range of 600-660 nm; and (G) the control system (300) is configured to control a spectral power distribution of the first device light (111) by controlling the first solid state light source (10) and the second solid state light source (20).

The invention provides a light generating system (1000) configured to generate in a first operational mode of the light generating system (1000) system light (1001), wherein: the system light (1001) in the first operational mode has a spectral power distribution with at least 85% of the spectral power in three emission bands (111,121,131) comprising (i) a first emission band (111) having a centroid wavelength of 445 nm + / −25 nm and having a full width half maximum of at maximum 25 nm, (ii) a second emission band (121) having a centroid wavelength of 541 nm + / −25 nm and having a full width half maximum of at maximum 150 nm, and (iii) a third emission band (131) having a centroid wavelength of 614 nm + / −25 nm and having a full width half maximum of at maximum 25 nm; in the first operational mode the light generating system (1000) is configured to control the spectral power distribution of the system light (1001) in dependence of a radiant flux of the system light (1001) while maintaining a correlated color temperature of the system light (1001) within + / −10% of a predetermined correlated color temperature value; and in the first operational mode the light generating system (1000) is configured to shift a color point (1010) of the system light (1001) towards a lower Duv with decreasing radiant flux of the system light (1001) or to shift the color point (1010) of the system light (1001) towards a higher Duv with increasing the radiant flux of the system light (1001).

The invention provides a light generating system (1000) comprising a first solid state light source (10) and a luminescent converter (2000), wherein: (A) the first solid state light source (10) is configured to generate first light source light (11) having a first peak wavelength (λpi ) selected from the range of 490-520 nm; (B) the luminescent converter (2000) is configured in a light receiving relationship with the first solid state light source (10); wherein the luminescent converter (2000) comprises a first luminescent material (210); wherein the first luminescent material (210) comprises a luminescent material of the type M'XM2-2XAX6 doped with tetravalent manganese, wherein M' comprises an alkaline earth cation, M comprises an alkaline cation, and x is in the range of 0-1, wherein A comprises a tetravalent cation, and wherein X comprises a monovalent anion, at least comprising fluorine; wherein the first luminescent material (210) is configured to convert part of the first light source light (11) received by the first luminescent material (210) into first luminescent material light (211); wherein the first luminescent material light (211) has a first centroid wavelength (λci) selected from the range of 610-650 nm; wherein the first luminescent material light (211) comprises at least one emission band having a first full width at half maximum FWHM1 of ≤ 55 nm; and (C) the light generating system (1000) is configured to generate system light (1001) comprising the first luminescent material light (211) and at least part of the first light source light (11); wherein the system light (1001) is white light having a correlated color temperature selected from the range of 1500-3400 K.

The invention relates to the technical field of chemiluminescence probes, in particular to a synthesis method and application of a boron dipyrromethene framework near-infrared two-region chemiluminescence probe based on X-ray activation, and the chemical structural formula of the chemiluminescence probe is shown in the specification. A novel BODIPY compound which is high in quantum yield and has a strong or narrow emission band is used as a chemiluminescence substrate for a core framework, a core framework of an electron withdrawing group with longer emission wavelength, an electron donating group and two molecules with larger wavelength overlap ratio are subjected to one-time CERT effect to be efficiently combined into a single molecule, and 1,050 nm chemiluminescence which is higher than 970 nm is emitted.

The present invention relates to an in-operando and non-destructive testing system (10) for testing the aging of at least one electrochemical element of a battery, the in-operando and non-destructive testing system (10) comprising: - a cavity (30); - a source (24) configured to emit L-band electromagnetic waves toward the cavity (30), the cavity (30) comprising a cylindrical resonator (38) with a circular base and having at least one longitudinal cut-out (46, 48); - a detector (28) capable of detecting the waves originating from the cavity (30); and - a processor (34) capable of analyzing the waves detected by the detector (28) in order to obtain at least one item of information relating to the aging of the at least one electrochemical element.

The invention relates to the technical field of intelligent display rack control, and discloses an intelligent display rack remote management and control system based on the Internet of Things, and the system comprises the steps: firstly obtaining the physical attributes and arrangement information of commodities displayed on an intelligent display rack, and constructing a commodity lattice display topology representing the periodic distribution of a medium space according to the physical attributes and arrangement information; thirdly, an electromagnetic forbidden band is calculated based on the topology, a terminal to be controlled is regarded as a dielectric structure defect in the topology, and a localization defect mode strictly existing in the frequency range of the electromagnetic forbidden band is solved; and in the execution stage, the remote control end accurately tunes the carrier center frequency of the wireless transmission signal to a frequency value corresponding to the localization defect mode, and strictly configures the transmission bandwidth according to the quality factor of the mode. And finally, electromagnetic energy of the control instruction is directionally focused and coupled to the to-be-controlled terminal by using a resonance excitation transmission mechanism of the localized defect mode, so that the communication shielding limitation of a high-density display environment is broken through.

This invention discloses a rapid method for detecting CTCs, belonging to the field of tetracycline detection technology. The invention uses a fluorescence spectrometer to measure the fluorescence intensity of the test solution containing fluorescent probes PEI-CuNCs and a surfactant. Compared with the fluorescence intensity of PEI-CuNCs, if a new blue fluorescence emission band appears at 425 nm and the blue-green fluorescence at 500 nm decreases, then the test solution contains CTCs. The detection method of this invention has advantages such as simple operation, speed, high sensitivity, good selectivity, low detection limit, and low cost. It does not require large-scale instruments or professional operators, and shows good spiked recovery rate in actual water sample testing, with reliable detection results and excellent practicality.

The invention relates to the technical field of operation parameter analysis and processing, and discloses a life detector operation parameter intelligent analysis system and method based on image recognition. Life detector rescue detection existing vital sign image data are scientifically preset, and intelligent analysis of a radar life detector electromagnetic wave emission decomposition frequency rescue detection result is carried out in combination with an intelligent identification algorithm and rescue detection electromagnetic wave emission band decomposition frequency detection image parameters. Accurate detection of the rescue detection effect of the electromagnetic wave emission frequency of the radar life detector is realized; and according to the rescue detection electromagnetic wave emission wave band decomposition frequency detection result analysis parameter, the intelligent search algorithm and the rescue detection electromagnetic wave emission wave band decomposition frequency parameter are combined to intelligently screen the optimal electromagnetic wave emission frequency of the rescue detection operation of the radar life detector. The intelligent screening of the optimal operation working parameters of the radar life detector is realized, and the rescue detection quality and efficiency of the radar life detector are improved.

A microcavity pixel array device and method of manufacture having a shared multi-DBR system configured to cover a broad spectral bandwidth range. A wide emission band is achieved by depositing a first DBR on top of an OLED array and subsequently depositing a second DBR on top of the first DBR, where each DBR has a unique design. The multiple DBRs cover a wider spectral bandwidth range than a single DBR, and therefore almost total reflection is achieved for a series of OLEDs designed at different color wavelengths.

The application discloses a red and near-infrared emission rare earth-based fluorescent powder and belongs to the technical field of luminescent materials. The application adopts a high-temperature solid-phase method to prepare the red and near-infrared emission rare earth-based fluorescent powder, and the chemical formula is Bi2Er (1‑x) O4Cl:xB; wherein 0.01<=x<=0.1; the element B is one of Li, Na and K. 3+ The element Er 3+ serves as a sensitized ion and a luminescent center ion. Different from a general up-conversion luminescent system which has multi-band emission in visible light, the red and near-infrared emission rare earth-based fluorescent powder has single-band red light emission in visible light, the luminescence is enhanced by 3.2 times, the emission range is wide, and the emission band covers a red light region of 630nm-730nm and a near-infrared region of 1500nm-1600nm. The near-infrared region has strong emission and thermal stability. In addition, the red and near-infrared emission rare earth-based fluorescent powder has low biological toxicity.

This invention discloses a sonar signal bandwidth extension method and system based on an adaptive sparse reconstruction approach. It acquires frequency domain data of active sonar echoes through matched filtering and extracts the transmission bandwidth range of the active sonar. A physical perception dictionary containing the physical ripple characteristics of the transmitted waveform is constructed to establish a precise mapping from the sparse target space to the observation frequency band. An adaptive threshold detection mechanism is introduced during the orthogonal matched pursuit iteration process to screen potential targets using the statistical characteristics of local background noise. A meshless global optimization algorithm is used to jointly fine-tune the target position in the continuous time domain. A full-band skeleton spectrum is constructed using precise parameters, and the noise residuals in the original frequency band are back-injected and inversely transformed to obtain a high-resolution time-domain waveform. This invention significantly improves the ability to distinguish closely spaced targets and the detection performance of weak targets in complex underwater acoustic environments.

An impulsive wave device for treating a vascular occlusion is described. The impulsive wave device includes an outer covering and an inner member connected at a distal end of the device. First and second conductive wires extend along a length of the device within a volume between the outer covering and the inner member. A conductive launch band surrounds the ends of the first and second conductive wires to form a first spark gap between the end of the first conductive wire and the launch band and a second spark gap between the end of the second conductive wire and the launch band. First and second impulsive waves can be initiated from the first and second spark gaps when the volume is filled with a conductive fluid and a high voltage pulse is applied across the first and second conductive wires.

The application provides a monolithic integrated micron LED chip, comprising a substrate and a plurality of micron LED devices, the micron LED device comprising an n-gallium nitride layer, an indium gallium nitride / gallium nitride multiple quantum well structure, a p-aluminum gallium nitride layer, a p-gallium nitride layer, a current diffusion layer and a passivation layer, the quantum barrier thickness is 0.5-5 nm, the monolithic integrated micron LED chip can be used for light detection through a high-voltage bias circuit, the high-voltage bias circuit provides a reverse bias voltage of 0-200 V and a bandwidth of 10 MHz-10 GHz; the monolithic integrated micron LED chip can be used for light emission and has a bandwidth of 10 MHz-10 GHz. The monolithic integrated micron LED chip has good photoelectric response characteristics and bandwidth characteristics under an extremely high reverse bias voltage. The application also provides an application of the monolithic integrated micron LED chip as a narrowband photoelectric detector and an application in high-speed visible light communication, and a visible light communication device.

The invention discloses orange fluorescent powder for a warm white light LED, and relates to the technical field of fluorescent powder preparation, and the preparation method comprises the following steps: S1, designing and preparing precursor raw materials: according to a target garnet matrix system, weighing oxide or carbonate containing Ca, Sc, Si, Lu, Mg, Al, Gd or Tb, an activator Ce2O3 and a sensitizer Pr6O11 or Sm2O3 according to a stoichiometric ratio; according to the orange fluorescent powder for the warm white light LED, effective red shift of an emission spectrum from green to orange is successfully realized through accurate matrix ion substitution. The fluorescent powder has the core advantages that the fluorescent powder has a wide emission band (the full width at half maximum is larger than or equal to 100 nm) and high quantum efficiency, spectrum deficiency of traditional yellow powder in a red light area can be effectively made up, and the fluorescent powder has excellent spectrum matching performance with a commercial blue light chip (450-460 nm).

Front-end systems with antenna switching that bypasses a transmit band filter are disclosed herein. In certain embodiments, a front-end architecture is based on switching the RF transmit signal behind or before the bandpass filter of the band. This enables the switch-combining and filter ganging used to support carrier aggregation and EN-DC connectivity to be maintained, and the SRS switching done this way for a target TDD band does not impact, interrupt, and / or otherwise re-route the partner bands. Accordingly, both an anchor carrier and a secondary carrier can be maintained without interruption or impact. Furthermore, carrier aggregation features can be maintained and is not interrupted by SRS.

The invention provides a light generating system (1000) comprising N light generating devices (110,...), optics (500), M diffuser assemblies (1710,...), and a light exit (1090); wherein: - a first light generating device (110) is configured to generate first device light (111), comprising an emission band having a first emission peak wavelength (λp1); wherein the first device light (111) comprises light having a first linear polarization; a second light generating device (120) is configured to generate second device light (121) comprising an emission band having a second emission peak wavelength (λp2); wherein the second device light (121) comprises light having the first linear polarization; a third light generating device (130) is configured to generate third device light (131), comprising an emission band having a third emission peak wavelength (λp3); and wherein spectral power distributions of the first device light (111), second device light (121), and third device light (131) mutually differ; - a first diffuser assembly (1710) comprises a first polarization converter (711) and a reflective polarization maintaining first diffuser (712); wherein the first polarization converter (711) comprises a ¼λ retarder with a first wavelength λr1m of maximum retardance; wherein λr1m / 4 is selected from the range of (λp1 / 4 + λp2 / 4) / 2 ± 5 nm; the first diffuser assembly (1710) is configured to diffuse at least part of the first device light (111) and at least part of the second device light (121) received by the first diffuser assembly (1710) into first diffused device light (1711) comprising diffused first device light (111) and diffused second device light (121); and the optics (500) are configured such that at least part of the first diffused device light (1711) and the third device light (131) received by the optics (500) are directed to the light exit (1090); - the light generating system (1000) is configured to generate system light (1001); wherein in a first operational mode of the light generating system (1000) the system light (1001) is white light comprising the first diffused device light (1711) and the third device light (131).

The invention discloses a zero-dimensional inorganic rare earth metal halide capable of exciting yellow light to emit light by ultraviolet or blue light as well as a preparation method and application of the zero-dimensional inorganic rare earth metal halide, and belongs to the technical field of photoluminescent materials. The compound is prepared by heating a solution of a cesium-containing compound and a dysprosium-containing compound and evaporating and crystallizing the solution. The compound has a completely isolated [DyCl6] octahedral 0D structure and can be excited in an ultraviolet light-blue light region of 300-500 nm in a broadband mode, the emission peak is located at 500-800 nm, and the main emission band is 572 nm. The preparation process flow of the zero-dimensional inorganic rare earth metal halide capable of being excited by ultraviolet light or blue light is simple to operate, the synthesis time is short, and the preparation method has huge application potential and commercial value.

This application discloses a fluorescent glass for mid-infrared emission and its preparation method, belonging to the field of optical materials technology. The method includes the following steps: S1, obtaining phosphor and sulfide glass powder respectively; S2, grinding the mixture containing phosphor and sulfide glass powder, pressing it into shape, and calcining it to obtain the fluorescent glass for mid-infrared emission. Combining the high brightness, wide color gamut, and high stability of phosphor with the low phonon energy and excellent mid-infrared transmittance of sulfide glass, this fluorescent glass can produce strong 2.65μm room temperature fluorescence output under 980nm laser pumping. The preparation method of this application can prepare fluorescent glass materials with a wide emission band in a short time and at a low cost. It is a simple and efficient method for synthesizing mid-infrared fluorescent glass and can expand the selection range of phosphors, resulting in significant economic benefits.

This invention discloses a fluorescent dye for shoe soles, its preparation method, and its application, belonging to the technical field of fluorescent materials for footwear. The fluorescent dye has the structure shown in Formula 1. An intermediate is synthesized via a Buchwald-Hartwig aromatic amination reaction, followed by Suzuki coupling to obtain the target product. This dye exhibits fluorescence quenching by inhibiting aggregation through a rigid planar structure and deuterated groups, with a HOMO-LUMO bandgap tuned to 2.8-3.2 eV, a broad emission band of 450-600 nm, and a fluorescence quantum efficiency of 0.55-0.75. When applied to shoe sole formulations, it comprises 40-60 parts of brominated butyl rubber and 0.1-2 parts of the fluorescent dye, and is prepared by mixing, vulcanization, and foaming. Compared to traditional dyes, it exhibits improved fluorescence intensity, enhanced resistance to photooxidation, and a reduction in dissolution rate of over 60%, while also possessing excellent resistance to damp heat and material compatibility.

A flat document of value has a surface area having a longitudinal direction and a transverse direction and which is provided with a luminescence feature in the surface area. The luminescence feature includes a first luminescence marker in a first subarea and a second luminescence marker in a second, different subarea. The first and second luminescence markers are able to be excited to luminesce at the same wavelength and luminesce, after excitation, essentially in the same emission band in the infrared spectral range. The first and second luminescence markers have spectrally similar infrared emission spectra, namely infrared emission spectra that have a spectral difference between 0.5% and 15%. The first and second subarea are arranged so as to overlap one another in the surface area in projection onto the longitudinal direction and / or in projection onto the transverse direction.