300 results about "Optically active" patented technology

The invention provides a river water quality monitoring method based on multi-source remote sensing data, and belongs to the technical field of river water quality monitoring. The method comprises the following steps: establishing an inherent optical characteristic model of a river water body based on a Hybrid water body radiation transmission model, optimizing a calculation path by adopting a shortest path algorithm, and carrying out water body optical component inversion by adopting a quasi-analysis algorithm and a generalized inherent optical characteristic algorithm in combination with a multispectral characteristic enhancement model to obtain absorption coefficients of all components; and constructing a multi-band combination index to realize optical coupling effect decoupling, and applying the fine-tuned water quality parameter inversion basic model to a target river area to output a suspended matter concentration distribution diagram, a chlorophyll concentration distribution diagram and a transparency distribution diagram. The technical problem of low precision of remote sensing inversion of water quality parameters caused by mutual coupling of multiple optical active components in a river water body is solved.

The invention belongs to the technical field of agricultural hyperspectral image classification, and discloses a non-optically active water quality parameter inversion method based on a hyperspectral image. The system comprises a data preprocessing module, a spectrum-spatial feature fusion module, a multi-algorithm collaborative inversion module and a visual output module. The collected hyperspectral images are input into the system, feature learning is carried out by fusing a Transform architecture and a Diffusion data generation technology, parameter optimization is carried out by combining machine learning algorithms such as a random forest and XGBoost, and a high-precision water quality inversion model is obtained after iterative training; and inputting a hyperspectral remote sensing image to be analyzed, and outputting a spatial distribution map of the non-optical activity water quality parameters to realize intelligent inversion of the water quality parameters. According to the method, spectral feature association is mined based on a self-attention mechanism of deep learning, the data characterization capability is enhanced through a diffusion model, the generalization performance of the model is improved through multi-algorithm collaborative optimization, and the efficiency of large-range water area monitoring and the parameter inversion precision are improved.

A method of fabricating an optoelectronic component, performed on a multi-layered wafer disposed on a substrate. The method comprises the steps of: etching the multi-layered wafer, thereby defining a slab and a multi-layered ridge, the slab having an upper surface below the ridge and being located between the multi-layered ridge and the substrate; selectively epitaxially growing a III-V semiconductor cladding adjacent to a first and second sidewall of the ridge, the cladding layer extending from the upper surface of the slab along the first and second sidewalls, and thereby cladding an optically active waveguide within the multi-layered ridge; and providing a first and second electrical contact, which electrically connect to a layer of the multi-layered ridge and the slab respectively.

A sensor includes an array of optically active pixels disposed on a semiconductor die. The array of optically active pixels includes at least one pixel (P1) configured to detect short wavelength infrared radiation (SWIR), and at least one pixel (P2) configured to detect visible light incident on the sensor.

An optical system, such as in a microlithographic projection exposure apparatus, comprising at least one optical element and a heating device for heating the optical element. The heating device comprises a plurality of heating segments to which electric current can be applied in order to generate heat. A continuous thermally induced deformation profile of the optical active surface having a deformation amplitude of at least 1λ can be adjusted by the heating segments so that the integral of the Fourier decomposition over at least one decadic spatial wavelength range is less than 10 mλ.

The invention discloses a method for preparing 2-(R)-fluoromethyl propionate with optical activity, and relates to the technical field of organic synthesis.The method comprises the steps that 1, an organic solvent and amines are added into a sealing system under nitrogen protection, hexafluoropropylene is added, a heat preservation reaction is conducted, then aftertreatment is conducted, and a fluorinating agent is obtained; and step 2, adding the fluorinating agent obtained in the step 1 and L-methyl lactate into a closed system under the protection of nitrogen, and carrying out heat preservation reaction to obtain the 2-(R)-fluoromethyl propionate. The method disclosed by the invention has the advantages of simple preparation process, low raw material cost, high yield, low safety risk, less generated three wastes and low treatment cost of the three wastes.

An optically active nanocomposite material is provided that may have a textured substrate and a multilayer optic stack with a plurality of layers comprising nanoplatelets. The nanoplatelets may be achiral and formed of a material such as transition metal chalcogenides, Mxenes, or nanocarbons. The optically active nanocomposite material displays both linear birefringence (LB) and linear dichroism (LD) and optional circular dichroism (CD). The nanocomposite may have an optical asymmetry g-factor of greater than or equal to about 1. Further, the nanocomposite is thermally stable, for example, to a temperature of greater than or equal to about 250° C. Different methods of fabricating such nanocomposites using layer-by-layer (LBL) processes are also provided.

The invention relates to an optical system, in particular for microlithography, comprising at least one optical element (100, 200, 300, 400) which has a substrate (105, 205, 305, 405) and at least one optically active layer system (110, 210, 310, 311, 410) located on this substrate (105, 205, 305, 405), and at least one monitoring unit (120, 220, 240, 320, 340) for monitoring a degradation state of this layer system (110, 210, 310, 311, 410), wherein the monitoring unit (120, 220, 240, 320, 340) has a detector (121, 221, 241, 321, 341) for detecting non-directional radiation (130, 230, 330, 430) which is emitted by the optical element (100, 200, 300, 400) during the operation of the optical system.

The invention discloses an ocean nearshore dissolved oxygen estimation method, system and equipment based on remote sensing data. The method comprises the following steps: S1, acquiring measured data of a dissolved oxygen concentration site of a sea area to be measured, ocean remote sensing product data and ocean numerical mode HYCOM reanalysis data; s2, performing data reconstruction on missing data of four elements including chlorophyll, granular organic carbon, suspended solids and sea surface temperature in the marine remote sensing product data by adopting a DINCAE algorithm to obtain complete marine remote sensing product data; s3, performing correlation analysis and variance expansion factor analysis on the five ocean elements related to the dissolved oxygen, selecting characteristic variables, and constructing a remote sensing estimation model of the dissolved oxygen; and S4, inverting the sea surface dissolved oxygen concentration of the sea area to be measured by adopting the optimal dissolved oxygen remote sensing estimation model, and drawing the spatial distribution of the dissolved oxygen concentration. According to the invention, the problem that the dissolved oxygen as a non-optical active substance has no characteristic response on a remote sensing spectrum and cannot be inversed directly by satellite remote sensing is solved.

The disclosure relates to waveguides for transmitting electromagnetic waves, for example image guides for transmitting image information, and to methods of manufacturing waveguides, which operate using transverse Anderson localization and may have an optically active material for improved contrast.

This invention relates to organometallic compounds, compositions comprising the organometallic compound, lithography methods using the organometallic compound, an optical element, optically active device or optical or semiconductor device obtainable by the lithography methods, hard masks obtainable by the lithography method, uses of the compounds or compositions, a method for the preparation of the compound.

The present application discloses a chiral dienyl-substituted carboxylate compound and an asymmetric preparation method thereof, wherein the chiral dienyl-substituted carboxylate compound is an optically active compound with the structure shown in the following formula I, including stereoisomers with the same chemical formula: in the formula, * represents a chiral carbon atom; the substituent R is selected from hydrogen, C 1‑10 alkyl or aryl; Ar is an aromatic ring or a substituted aromatic ring; R 1 , R 2 , R 3 , R 4 , R 5 are independently selected from hydrogen, halogen, C 1‑10 alkyl or alkoxy; R 6 is independently selected from C 1‑10 alkyl or aryl; R 7 is independently selected from C 1‑10 alkyl or aryl. The present application applies a chiral isothiourea catalytic electrochemical synthesis system to precisely and quickly synthesize the chiral dienyl-substituted carboxylate compound in a high yield and high stereoselectivity and in a gram-scale. The preparation method of the present application is simple, and has biomedical practicability and industrial application prospect.

The invention discloses an optically active glufosinate-lysine salt with a structure as shown in a formula (I-IV) as shown in the specification. The invention also discloses a method for preparing the optically active glufosinate-lysine salt, which comprises the following steps: taking D, L-glufosinate or a salt thereof as a raw material, taking D-lysine or L-lysine as a resolving agent, and taking D-lysine or L-lysine as a resolving agent to obtain the optically active glufosinate-lysine salt. And obtaining the L-glufosinate-D-lysine salt, the D-glufosinate-D-lysine salt, the L-glufosinate-L-lysine salt or the D-glufosinate-L-lysine salt through a resolution reaction, crystallization and filtration in a suitable resolving agent system. The D-glufosinate-D-lysine salt or the L-glufosinate-L-lysine salt is prepared by taking the D-glufosinate-D-lysine salt as a resolution solvent of an anhydrous system; and the L-glufosinate-D-lysine salt or the D-glufosinate-L-lysine salt is prepared by using a resolution solvent as an aqueous system.

To provide a method for synthesizing a cyanide that is a precursor to a β-amino acid derivative having bulky optical activity, intended for peptide synthesis including a β-amino acid having bulky optical activity.SOLUTION: The present invention provides a method for synthesizing a cyanation product having a bulky tertiary alkylated structure and having optical activity, by reacting an α-haloamide having a bulky tertiary alkylated structure and having optical activity with a cyanohydrin in the presence of a copper catalyst.SELECTED DRAWING: None

This disclosure provides an optically active nanocomposite material having a textured substrate and a multilayer optical stack comprising multiple nanosheets. The nanosheets may be chiral and composed of materials such as transition metal chalcogenides, MXenes, or nanocarbon. The optically active nanocomposite material exhibits linear birefringence (LB) and linear dichroism (LD), and optionally circular dichroism (CD). The nanocomposite material also exhibits optical asymmetry. g The factor may be greater than or equal to 1. Furthermore, the nanocomposite material exhibits thermal stability, for example, remaining stable at temperatures above or equal to about 250 °C. This disclosure also provides different methods for preparing such nanocomposite materials using a layer-by-layer self-assembly (LBL) process.

This invention provides novel stem cell activators, topical skin agents containing the aforementioned stem cell activators, and skin cosmetics containing the aforementioned stem cell activators. The stem cell activator of this invention comprises at least one compound selected from compounds (including optically active agents) shown in formula (1), salts of the aforementioned compounds, and hydrates thereof as active ingredients. In the following formula, R... 1 R 2 Represents a hydrogen atom or a hydrocarbon group. R 3 Represents a hydrogen atom or an organic group. n represents an integer greater than or equal to 1. The above hydrocarbon groups may have substituents. [Chemical Formula 1]

Optically active devices and processes for preparing such devices are disclosed. A device in accordance with the present disclosure comprises a patterned surface, wherein the patterned surface comprises a plurality of pattern elements, and a plurality of LED light sources each optically coupled and / or radiationally connected to at least one pattern element of the plurality of pattern elements. The plurality of pattern elements comprise at least one optically active material and a photoresist material.

The present application relates to a kind of catalyst composition and its application in catalytic preparation optically active secondary alcohol, the catalyst composition includes chiral ionic bridged aryloxyalkane rare earth complex and additive, the additive is selected from one or more of pyrimidine, N,N-dicyclohexylmethylamine, 4,4'-dipyridyl.The above-mentioned catalyst composition can be used for synergistically catalyzing asymmetric borohydration of chalcone and its derivatives with pinacol borane, and show high catalytic activity and high enantioselectivity, product yield is as high as 99%, ee value can reach 84%, provide a reliable new way for the efficient, high selective synthesis of optically active secondary alcohol.

An optical gate device may have one or more optical cavities. The optical cavity may have an embedded optically-active material providing strong light-matter coupling. A pump input allows application to of a pulsed optical pump beam the optically-active material. The pump beam is absorbed by the optically active material to form an exciton-polariton condensate which emits light. The optical gate device may have an input waveguide to input a seed signal to the optical cavity. The optical gate device may include an output waveguide to output of an optical signal at a wavelength corresponding to a resonant mode of a the cavity. The device may operate in a manner such that, when the pump beam is applied to the pump input, an optical output signal is selectively provided in the output waveguide, via the input of the a seed signal and light emitted by the exciton-polariton condensate.

Method for operating a lithography system (1) comprising an optical system (100) with an optical element (102), comprising the steps: a) providing (S1) a plasma (108) in an environment (110) of an optically active surface (104) of the optical element (102) for modifying the optically active surface (104), b) Determining (S2) an actual value (F IST ) at least one parameter (F) of the optically active surface (104), and c) controlling (S4) the at least one parameter (F) of the optically active surface (104) based on the determined actual value (F IST ) and a predetermined target value (F SOLL ) by adjusting at least one plasma parameter (P1) of the provided plasma (108).

The present invention relates to an intrinsically polarized light detector comprising an optically active layer comprising a blended structure of a polymer donor and a small molecule acceptor, wherein the optically active layer exhibits anisotropy. The disclosed intrinsically polarized light detector based on a non-fullerene organic conjugated small molecule achieves simultaneous directional alignment of the polymer donor and the non-fullerene organic conjugated small molecule acceptor in the blended film, achieving optical anisotropy within their respective absorption spectrum bands. This enables the intrinsically polarized light detector to detect polarized light within the absorption spectrum bands of the two, filling a current research gap. Furthermore, the detector has the advantages of a simple structure, easy preparation, tunable response light, low energy consumption, room-temperature operation, and low cost, and holds great promise for future applications in complex, compact, integrated, and space-based detection and imaging systems.

The invention relates to an adenosine triphosphate optical probe, in particular to an adenosine triphosphate (ATP) optical probe as well as a preparation method and application thereof. Specifically, the invention provides an adenosine triphosphate optical probe, which comprises an adenosine triphosphate sensitive polypeptide and an optically active polypeptide, and the optically active polypeptide is located in the sequence of the adenosine triphosphate sensitive polypeptide.

A device, method, and hybrid computing architecture for a Symbolic Photonic Logic Gate (SPLG) system that performs data processing primarily in the optical domain. The system comprises a photonic substrate, including silicon-photonics, indium phosphide, or similar optically active materials, patterned with optical waveguides and interferometric structures configured to implement logic operations through controlled optical interference, phase modulation, or non-linear optical effects. The SPLG system is configured to execute Boolean and symbolic logic functions without requiring intermediate optical-to-electrical signal conversion. In operation, information is encoded into one or more optical parameters including phase, polarization, wavelength, or amplitude, and processed within a Symbolic Optical Core optimized for linear algebraic operations such as matrix multiplication and vector transformation. The architecture further comprises an electronic control layer configured to initialize, configure, and monitor the photonic logic elements while allowing the majority of computational operations to occur within the optical domain, thereby reducing electrical interconnect congestion and resistive heating relative to fully electronic processors.

To provide a method for obtaining an optically active hydrogen-phosphine borane compound at high optical purity. Also, to provide a method for obtaining an optically active 2,3-bis(dialkylphosphino)pyrazine derivative at high optical purity. Provided is a method for producing an optically active hydrogen-phosphine borane compound comprising carrying out a decomposition reaction of an optically active phosphine borane compound in the presence of a phase-transfer catalyst using an alkaline aqueous solution and an organic solvent. Also provided is a method for producing an optically active 2,3-bis(dialkylphosphino)pyrazine derivative using the optically active hydrogen-phosphine borane compound obtained.

To provide a chromophore useful for being included in a film having electro-optical activity and an electro-optical device.SOLUTION: There is provided a compound represented by formula (A).SELECTED DRAWING: Figure 6A

Provided is a method for efficiently producing a fluorinated alkyl compound by directly converting an aliphatic alkylamine widely existing in nature into a fluorine substituent, the method being characterized in that an alkylamine compound in which at least one amino group is bonded to an alkyl carbon is reacted with a deamination-fluorination agent to produce the fluorinated alkyl compound.

The present invention relates to the fields of biopharmaceuticals and biochemical engineering, and particularly relates to a method for preparing chiral β-trifluoromethyl alcohol compounds using non-heme iron enzyme BsQueD or its mutants. Using non-heme iron enzyme BsQueD or its mutants as catalysts, trifluoromethyl ketone as a substrate, and phenylsilane as a hydrogen source, chiral β-trifluoromethyl alcohol is obtained after the reaction. The amino acid sequence of the non-heme iron enzyme BsQueD is shown in SEQ ID NO.1. It has a high conversion rate (70%) for the substrate trifluoromethyl ketone, high optical activity of the product β-trifluoromethyl alcohol (e.e. value greater than 90%), and high yield, greatly reducing the production cost.

The invention relates to processes for preparing carbaprostacyclin analogues and intermediates prepared from the processes. The invention also relates to cyclopentenone intermediates in racemic or optically active form.

Methods are described for transferring optically active features, such as meta-atoms and diffractive elements formed on a planar surface, to a non-planar surface with high precision. The described methods can be used to fabricate optical devices having meta-atoms or other diffractive features disposed on non-planar surfaces and / or planar surfaces. Related optical systems and components are described.

The application designs a method for preparing optically active methyl fluoropropionate by using diethylamine sulfur trifluoride, comprising the following steps: fluorination reaction: under the protection of nitrogen, methyl S-lactate is added to a dry reaction kettle as raw material, the kettle temperature is cooled to a first reaction temperature, diethylamine sulfur trifluoride is added dropwise into the reaction kettle, after dropping, the reaction kettle is heated to a second reaction temperature, after the reaction is completed, the reaction mixture is added dropwise into saturated sodium / potassium bicarbonate aqueous solution to obtain R-2-fluoropropionic acid methyl ester; the molar ratio of diethylamine sulfur trifluoride to methyl S-lactate is 1-1.5:1, the method is high in efficiency, low in three-waste amount, short in reaction path, suitable for industrial production, and has economic value.