423results about "Spectrum generation using multiple reflection" patented technology

The invention discloses a multi-component gas detection device and method based on a metasurface quasi-continuous domain bound state. The advanced nanometer manufacturing technology and the deep learning algorithm are adopted, and high-precision, high-sensitivity and high-selectivity gas detection is achieved. According to the invention, the metasurface array with specific design is utilized, and the quasi-continuous domain bound state in the middle-infrared band is realized by accurately regulating and controlling the geometric parameters and material characteristics of the microstructure, so that excellent optical response is obtained. In combination with a deep learning algorithm, complex spectral information is converted into accurate gas composition and concentration information, and a reliable solution is provided for the fields of environmental monitoring, industrial production, safety monitoring and the like.

The invention discloses a reconstruction spectral imaging system based on an electromagnetic drive Fabry-Perot resonant cavity, and belongs to the field of spectral imaging. The system comprises an optical lens group, an electromagnetic driving device, a Fabry-Perot resonant cavity, a photoelectric detection array and a calculation unit, the cavity length of the Fabry-Perot resonant cavity can be adjusted through the electromagnetic driving device. The optical lens group receives light reflected or emitted by an external to-be-measured target scene and carries out collimation processing, and then the light enters the Fabry-Perot resonant cavity. The Fabry-Perot resonant cavity screens the incident light based on the resonance condition of the cavity length of the Fabry-Perot resonant cavity, and the screened light is emitted to the photoelectric detection array; the photoelectric detection array converts the incident light intensity into an electric signal and outputs the electric signal to the calculation unit; and a spectrum reconstruction model is built in the calculation unit, and a hyperspectral image of the to-be-measured target scene is obtained by using the spectrum reconstruction model based on the electric signal. The working range and the spectral imaging precision of the spectral imaging system based on the Fabry-Perot resonator are improved, the technological requirements are reduced, and the engineering applicability of the spectral imaging system based on the Fabry-Perot resonator is improved.

A system and method of instantaneously acquiring a spatio-spectral cube image from a sample material, using a perturbative mosaic array element, configured in correspondence with a photo-detecting pixel array sensor.

Disclosed is a linear array scanning Brillouin scattering elastic imaging device. In the device, a signal generating system consists of a narrow linewidth continuous wave laser, a half-wave plate, a beam expander, a Y-direction scanning galvanometer, a microlens array, a pinhole array filter, a first plano-convex lens, a polarization beam splitter, a quarter-wave plate and a microscope objective. A signal receiving system consists of a microscope objective, a quarter-wave plate, a polarization beam splitter and an eight-channel optical collimator array. Each channel of an eight-channel spectrometer consists of an optical collimator, a convex lens, a scanning Fabry-Perot interferometer, a photomultiplier tube and an eight-channel photon collection card.

A composite optical filter may include a substrate, a communal optical filter, one or more first optical filters, and one or more second optical filters. The communal optical filter may be formed on a first surface of the substrate. The one or more first optical filters may be formed on one or more first portions of a second surface of the substrate and may be configured to pass light associated with a first wavelength. The one or more second optical filters may be formed on one or more second portions of the second surface of the substrate and may be configured to pass light associated with a second wavelength.

To increase variable speeds in a wavelength variable bass-pass filter of SBS type.SOLUTION: Provided is a wavelength variable band-pass filter using Simulated Brillouin Scattering (SBS), comprising: a light source for outputting SBS pump light based on a set wavelength; an SBS medium which the SBS pump light and the signal light to be filtered are inputted to, and which outputs part of SBS-amplified signal light; and a path control unit located between the light source and the SBS medium, for forwarding input from the SBS medium to an output terminal while outputting input from the light source to the SBS medium. The light source is a Dispersion-Tuned Mode-Locked Laser (DTMLL).SELECTED DRAWING: Figure 6

An apparatus (500) for spectral measurements comprises: - an illuminating unit (110) to form narrowband light pulses (B2t1, B2t2) at different wavelengths (λ1,λ2) for illuminating an object (OBJ1) with the narrowband light pulses (B2t1, B2t2) - a sensor (SEN1) to detect light (B3) received from the object (OBJ1), - a control unit (CNT1) to control operation of the sensor (SEN1), wherein the illuminating unit (110) comprises: - a broadband light source (LS1) to generate broadband light pulses (B1), - a Fabry-Perot interferometer (FPI1) to form narrowband light pulses (B2) by filtering the broadband light pulses (B1), wherein the broadband light source (LS1) is arranged to generate a first broadband light pulse (B1t1) at a first trigger time (t1), and to generate a second broadband light pulse (B1t2) at a second trigger time (t2), wherein the Fabry-Perot interferometer (FPI1) is tunable by moving a mirror (M2) of the Fabry-Perot interferometer (FPI1), wherein the illuminating unit (110) is arranged to operate such that a movement of the mirror (M2) is not stopped between the first trigger time (t1) and the second trigger time (t2), wherein a start time (tA1) of a first exposure time (ΔtEX1) of the sensor (SEN1), and a duration of the first exposure time (ΔtEX1) are controlled such that the illuminating unit (110) forms the first broadband light pulse (B1t1) and the second broadband light pulse (B1t2) during the first exposure time (ΔtEX1).

The invention discloses a DNA biosensor based on a reflection interference spectrum, a preparation method and application of the DNA biosensor to detection of doxorubicin. The DNA biosensor is characterized in that uniformly distributed nanopores are processed in the upper surface of an anodic aluminum oxide substrate, a copper layer is arranged on the upper surface of the anodic aluminum oxide substrate outside the nanopores, probe ssDNA is connected to the walls of the nanopores through Schiff base bonds, and target ssDNA is connected to the probe ssDNA. According to the present invention, the optical signal change during the process of filling the drug molecules into the DNA molecules can be monitored in real time through the reflection interference spectrum technology, the long-time incubation and washing steps are not required, the detection time is substantially shortened, the rapid detection requirement is met, and the timely detection result is provided especially for the doxorubicin detection application.

A photodetection device includes: a filter array including a plurality of filters arranged in a two-dimensional array, the plurality of filters including a first filter and a second filter, the first filter and the second filter each including a first reflective layer, a second reflective layer, and an intermediate layer between the first reflective layer and the second reflective layer and having a resonant structure having a plurality of resonant modes differing in order from each other, at least one selected from the group consisting of a refractive index and a thickness of the intermediate layer of the first filter being different from the at least one selected from the group consisting of a refractive index and a thickness of the intermediate layer of the second filter; and an image sensor disposed at a position where the image senor receives light having passed through the filter array.

To provide a spectroscopic unit and spectroscopic module that can perform measurements with high precision. [Solution] The spectroscopic unit 110 includes a Fabry-Perot interference filter 10 having a pair of mirrors whose distance from each other is variable, an optical system 50 having a first lens 51 that focuses light from an object M onto the Fabry-Perot interference filter 10, and a photodetector 8 that detects light transmitted through the Fabry-Perot interference filter 10. When the distance D1 from the first lens 51 to the object M is 5 cm, and a circular area on the surface of the object M with a diameter D2 of 1 cm is defined as the field of view region A, the optical system 50 is configured to allow light with a divergence angle of 1 degree or less to enter the light transmission region of the Fabry-Perot interference filter 10, while preventing light with a divergence angle greater than 1 degree from entering the light transmission region of the Fabry-Perot interference filter 10 from entering the light transmission region.

A light detection device includes: a Fabry-Perot interference filter provided with a light transmission region; a light detector configured to detect light transmitted through the light transmission region; a package having an opening and accommodating the Fabry-Perot interference filter and the light detector; and a light transmitting unit arranged on an inner surface of the package so as to close an opening, the light transmitting unit including a band pass filter configured to transmit light incident on the light transmission region. When viewed from a direction parallel to the line, an outer edge of the Fabry-Perot interference filter is positioned outside an outer edge of the opening, and an outer edge of the light transmitting unit is positioned outside the outer edge of the Fabry-Perot interference filter.

A method for calibrating the driving parameters of an optical component within its operating wavelength range. The method includes placing a material layer in an optical path, the material layer being substantially planar and substantially transparent, and having a thickness on the order of wavelengths within the range; operating the component to change the driving parameters while detecting light transmitted through the material layer to obtain driving parameter and light intensity data. The obtained data is then compared with previously derived characterization data for the material layer to calibrate the driving parameters.

Calibrating a spectral imaging device includesproviding first calibration light, with first calibration spectrum (IMPBF),coupling the first calibration light to the device,obtaining a first measured profile of the first calibration light by recording first detector pixel signals during scanning a control parameter of a Fabry-Perot interferometer of the device,obtaining a second measured profile of the first calibration light by recording second detector pixel signals during scanning,determining a first simulated profile from the first calibration spectrum using previously measured spectral quantum efficiency of first detector pixels, previously measured spectral transmittance function, and first calibration data,determining a second simulated profile from the first calibration spectrum using previously measured spectral quantum efficiency of second detector pixels, previously measured spectral transmittance function, and the first calibration data, andmodifying first calibration data until simulated profiles match with corresponding measured profiles.

A method of manufacturing a Fabry-Perot interference filter includes a forming step of forming a first thinned region, a first mirror layer, a sacrificial layer, and a second mirror layer are formed on a first main surface of a wafer, and the first thinned region in which at least one of the first mirror layer, the sacrificial layer, and the second mirror layer is partially thinned along each of a plurality of lines is formed; a cutting step of cutting the wafer into a plurality of substrates along each of the plurality of lines by forming a modified region within the wafer along each of the plurality of lines through irradiation of a laser light, after the forming step; and a removing step of removing a portion from the sacrificial layer through etching, between the forming step and the cutting step or after the cutting step.

A medication assurance system for verification of both the medication and the patient is disclosed. A portable spectrometer is used to obtain a light spectrum of the medication. A subject identification or biometric device is used to identify the patient. A controller coupled to the portable spectrometer and the subject identification device identifies the medication by performing a chemometric analysis of the light spectrum. Based on the medication identified and the patient identified, the controller can determine if the medication is to be taken by the patient.

The lens unit (2) is provided with a housing (21) and an optical system (22) disposed in the housing. An optical system (22) is provided with: a Fabry-Perot interference filter (10); a first aperture (P1), which is formed integrally with the Fabry-Perot interference filter (10), and through which light directed toward the Fabry-Perot interference filter (10) or light transmitted through the Fabry-Perot interference filter (10) passes; a first lens unit (23) that focuses or parallelizes light from the incident unit toward the Fabry-Perot interference filter; and a second lens unit (24) that forms an image of the light that has passed through the Fabry-Perot interference filter and has been emitted from the emission unit. When viewed from the optical axis direction, the width of the light at the incident position of the first aperture (P1) is wider than the width of the first aperture (P1).

The invention discloses a spectrum super-resolution method and system based on an FP cavity and deep learning, and the method comprises the steps: S1, carrying out the initialization of spectrum collection, and selecting light with a specific wavelength after the light is acted with a target detection object; s2, performing photoelectric conversion and digitization to generate low-resolution original discrete spectrum data of corresponding wavelengths; s3, continuous spectrum scanning is carried out, and original discrete spectrum data collection of the whole target wave band is completed; and S4, performing super-resolution spectrum reconstruction, and judging whether cyclic reconstruction is performed or not based on a reconstruction data quality evaluation result until the quality is qualified. According to the method, an accurate mapping model from a low-resolution spectrum to a high-resolution spectrum is established through a pre-trained deep neural network, and an original spectrum which is collected by an FP cavity and is limited by the theoretical limit optical resolution of the FP cavity can be reconstructed into a super-resolution spectrum of which the resolution remarkably exceeds the theoretical limit. The problem that the resolution of an FP cavity in a long-wave region is sharply reduced is effectively solved, and the full-wave-band uniform high resolution is realized.

Liquid membrane cell assemblies are disclosed. In some embodiments, the liquid membrane cell assembly includes an elongate base having opposed first and second end portions and a central portion disposed therebetween. The first and second end portions each includes an elongate body, an electrolyte channel within the body, an electrolyte port fluidly connected to the electrolyte channel, a fuel channel within the body, and a fuel port fluidly connected to the fuel channel. The central portion includes spaced and opposed first and second members that connect the bases of the first and second portions and that horizontally define an open area therebetween. The liquid membrane cell assembly additionally includes an anode adjacent the first and second members, and a cathode adjacent the first and second members such that the base is disposed between the anode and the cathode. The anode and cathode vertically define the open area therebetween.

To provide a favorable filter array with reduced stray focused light.SOLUTION: An apparatus is disclosed comprising an optical filter array (10) including an array of optical filter elements; where each optical filter element has opposing mutually parallel principal faces connected by sidewalls including at least one pair of opposing trapezoidal sidewalls and at least one pair of opposing sidewalls that are not mutually parallel; and where the opposing mutually parallel principal faces of the filter elements collectively define optical entrance and exit apertures of the optical filter array and include interference filters. Further disclosed is a method of illuminating such a filter array.SELECTED DRAWING: Figure 1

The solid-state optical cavity may include a first mirror and a second mirror that provide reflective surfaces for reflecting light back and forth within the cavity to create a standing wave at a resonant frequency. A thin-film lithium niobate layer may be deposited between the first mirror and the second mirror. The thin-film lithium niobate layer may be configured to be electrically tunable to optically select the resonant frequency.

The invention discloses a broadband FP (Fabry-Perot) cavity transmission spectral line calibration method and a calibration spectral line generation device, and belongs to the field of astronomical spectrum calibration. According to the invention, the laser frequency comb is utilized to carry out precise calibration on the FP cavity, the precision is an Hz magnitude, and the calibration precision of the radial velocity of the FP cavity can reach m / s; by tuning laser frequency comb parameters, all transmission peaks are supplemented, and broadband coverage is achieved; the high precision requirement for FP cavity coating is avoided, the accuracy of transmission spectral lines is ensured, frequent calibration is performed on the FP cavity, and the problem that the FP cavity cannot provide long-term stability of frequency is solved; a low-repetition-frequency picosecond white light source is used, the spectrum is wide and flat, the spectrum is not sensitive to the position of a transmission peak of an FP cavity, and the light enters a calibrated FP cavity array to generate a calibration spectral line with a high signal-to-noise ratio and multiple frequency intervals, so that the calibration precision of the astronomical spectrometer reaches the cm / s-level radial velocity calibration precision. The method is applied to the calibration of the astronomical spectrometer for extrasolar planet search.

An optical sensor includes a substrate, a Fabry-Perot interferometer, and first and second photodetectors. The Fabry-Perot interferometer includes first and second reflectors and is mounted on the substrate such that light is transmitted through the interferometer to the substrate. The first and second photodetectors are configured to detect light transmitted through the etalon and the substrate. The first photodetector is sensitive to a first wavelength range, and the second photodetector is sensitive to a second wavelength range, wherein the first and second wavelength ranges each correspond to a different mode of the interferometer.

The invention relates to an optical system with an entrance pupil (9), which has a first aperture diameter (D1), an exit pupil (10) and a reflective or transmissive filter element (6) spaced at a distance from the entrance pupil (9), which is designed and arranged such that a second diameter (D2) is illuminated on the filter element (6) by a beam passing through the entrance pupil (9) and spreading divergently from this, wherein the second diameter (D2) corresponds to n times the first aperture diameter (D1) and n is an number greater than 1, as a result of which the local angular spectrum at each point on the filter element (6) is n times smaller in comparison to the entrance pupil (9), wherein the filter element (6) selectively reflects or transmits to the exit pupil (10) at each point only a predetermined spectral range and wherein an optical imaging unit (3) comprising the filter element (6) is provided, which images the entrance pupil (9) onto the exit pupil (10).

To provide a spectroscopic imaging method, a spectroscopic imaging apparatus, and a computer program capable of performing simple spectroscopic imaging.SOLUTION: A spectroscopic imaging method includes the steps of: setting a wavelength for spectroscopic imaging an object; installing the object and a white reference in an imaging region in which the object is imaged; identifying a position of the white reference to set the position of the white reference as a reference area; preliminary imaging the reference area with predetermined exposure time for each of a plurality of wavelengths to acquire an intensity value for each wavelength; calculating exposure time at actual imaging on the basis of a maximum intensity value obtained by preliminary imaging and a target intensity value at the actual imaging; actual imaging the object with the exposure time at the actual imaging; generating a processed image on the basis of an intensity spectrum of all pixels of a captured image of the object with respect to an intensity spectrum of the reference area; and displaying the processed image.SELECTED DRAWING: Figure 2

An optical filter device includes: a Fabry-Perot interference filter that includes: a first structural body having first and second surfaces; a second structural body having a third surface; a first mirror portion provided to the first structural body; a second mirror portion provided to the second structural body so as to face the first mirror portion via an air gap; a first driving electrode provided to the first structural body; a second driving electrode provided to the second structural body; first and third terminals electrically connected to the first driving electrode; and a second terminal electrically connected to the second driving electrode. A distance between the first driving electrode and the air gap is shorter than a distance between the second surface and the air gap. A resistance measurement unit is electrically connected to the first and third terminals and measures a resistance value of the first driving electrode.

A spectral measurement device (110) for measuring optical radiation (112) provided by at least one measurement object (118) with a spectral measurement based on at least one classification, said spectral measurement device (110) comprising: - at least one radiation source (116) configured to emit optical radiation (112) at least partially towards said measurement object (118), said optical radiation (112) being at least partially within a spectral range that is subject to a classification-based spectral measurement; - at least two photodetectors (120), each photodetector (120) comprising at least one pixel (121), each pixel (121) being an active pixel (123) or a dark pixel (124), the spectral measurement device (110) comprising at least two active pixels (123), the spectral measurement device (110) comprising at least one dark pixel (124), each active pixel (123) configured to generate at least one photodetector signal dependent on illumination of the active pixel (123), at least two of the active pixels (123) configured to detect optical radiation in at least partially different spectral ranges, each dark pixel (124) configured to generate at least one photodetector signal independent of illumination of the dark pixel (124); - at least one readout device (139) configured to measure said photodetector signal and to generate at least one item of spectral data; at least one evaluation device (140) comprising at least one processor (142) and at least one memory storage (144), said memory storage (144) comprising: at least one classification model including a set of distinct classes, each class referring to at least one spectral characteristic, said classification model configured to classify at least one item of input data into said class; at least one transfer function configured to transfer the items of spectral data to items of input data applicable to the classification model; and at least one evaluation device (140) configured to store the Equipped with. The evaluation unit (140) is configured to generate at least one item of measurement information by applying the classification model and the transfer function to an item of the spectral data.

An optical assembly is disclosed comprising an elbowed optical conduit comprising a first surface, a second surface, and a third surface, wherein the third surface is configured to receive signal light from the first surface and reflect the signal light towards the second surface; a first laterally variable bandpass optical filter optically coupled to the second surface and configured to receive the signal light propagated in the elbowed optical conduit; a second laterally variable bandpass optical filter arranged at a distance from the first laterally variable bandpass optical filter; and a sensor coupled to the second laterally variable bandpass optical filter; wherein the first laterally variable bandpass optical filter has a first bandpass center wavelength; and wherein the second laterally variable bandpass optical filter has a second bandpass center wavelength.

To reduce an error accompanying the generation of images of a plurality of wavelength bands.SOLUTION: A method includes: acquiring first information indicating a relative position between an encoding element including a plurality of regions having spectral transmittance different from each other and an image sensor that detects light transmitted through the encoding element; and correcting data including second information about the spatial distribution of the spectral transmittance on the basis of the first information. The data is used for processing of generating four or more spectral images on the basis of an image acquired by causing the image sensor to detect the light transmitted through the encoding element. Each of the four or more spectral images indicates an image corresponding to one wavelength band of the four or more wavelength bands.SELECTED DRAWING: Figure 1A

An Offner spectrometer for use in a multi-slit hyperspectral imaging system for imaging a remote object includes a first surface that is a transmissive surface having a narrow slit receiving light from a multi-spectral light source, a second curved transmissive surface receiving light from the first surface, a third curved reflective surface receiving light from the second surface, a fourth reflective surface that is a curved surface with a grating receiving light from the third surface and diffracting and reflecting light, a fifth surface that is curved reflective surface receiving light from the fourth surface, a sixth curved transmissive surface receiving light from the fifth surface, and a seventh surface that is a focal plane of the Offner spectrometer receiving light from the sixth surface. Each curved surface has X and Y prescriptions that are decoupled.