283results about "Spectrum generation" patented technology

The resolution-customizable micro spectrometer based on the transverse dispersion metasurface comprises a dispersion metasurface array structure and a focal plane pixel array, and the dispersion metasurface array structure comprises a plurality of dispersion metasurface sub-arrays which are distributed in an array mode and used for preliminary spectrum decoupling and directional convergence. The dispersion metasurface subarray comprises a plurality of dispersion metasurface units and all-dielectric substrates thereof, the dispersion metasurface units are nano-columns with four-fold symmetry, the nano-columns are periodically arranged, and the phase of transmission light is dynamically regulated and controlled according to the frequency omega of incident light. The focal position (x ', y') of the transmission light on the focal plane is in a linear mapping relation along with the change of the omega; the focal plane pixel array comprises a multi-element plane array composed of a plurality of pixels, and the multi-element plane array is in pixel-level registration with the dispersion metasurface sub-array. According to the invention, pixel-level precise condensation is realized, crosstalk is effectively inhibited, the detection precision is improved, and real snapshot spectral imaging is realized.

The invention discloses an ultra-high-speed imaging device based on acousto-optic filtering modulation. The ultra-high-speed imaging device comprises a spectrum modulation system, a spectrum imaging system and a data processing system. The spectrum modulation system utilizes an acousto-optic tunable filter (AOTF) to dynamically modulate broadband continuous spectrum light, narrow-band illumination light which rapidly changes along with time is generated, and time information of a dynamic scene is effectively mapped to a spectrum dimension. And the spectral imaging system images the spectral coded dynamic scene to the hyperspectral camera to realize acquisition of spectral space-time information. The data processing system performs spectral crosstalk correction, channel separation and demosaicing reconstruction on the acquired original mosaic image, and recovers a time sequence image according to a spectrum-time mapping relation, thereby realizing single-shot superspeed imaging in a dynamic process. The device has the advantages of being simple and compact in structure, flexible in time window, high in imaging fidelity and the like, and has wide application prospects in the fields of rapid dynamics such as microfluidics, laser processing and ultrafast physics.

The invention provides a spectrometer system comprising a spectrometer chip comprising a camera and a metasurface located on a detection surface of the camera; the metasurface comprises a plurality of nano-pore or nano-column arrays, and selective absorption of light with different wavelengths is realized through surface plasmons generated by different nano-pores or nano-columns; the camera detects the intensity change of light to be detected after the light passes through different nano-pores or nano-column arrays of the metasurface, and then spectral information is obtained through calculation. According to the spectrograph system, selective absorption of light with different wavelengths is achieved through the metasurface, and then spectral information is obtained through calculation, so that the structure of the spectrograph system is compact, and the overall size is very small; and the plasmon generated by the nanopore or nanopillar array has high tolerance to the structure size, so that the processing precision is lower, and large-area and large-batch preparation can be realized.

An apparatus includes a spectrometer receiving an optical input signal that includes an input optical spectrum. The spectrometer includes a fiber laser cavity pumped by a first optical replica of the optical input signal that generates stimulated Brillouin scattering traveling in a direction opposite to a direction of the optical input signal. The first optical replica of the optical input signal excites at least one lasing mode in the fiber laser cavity. The at least one lasing mode respectively includes at least one lasing mode frequency. The at least one lasing mode frequency is offset by a respective Brillouin frequency shift from the respective at least one input frequency. The spectrometer also includes an optical heterodyne receiver. The optical heterodyne receiver generates the electrical output signal. The spectrometer outputs a measurement of the input optical spectrum based on the respective Brillouin frequency shift and the at least one input frequency.

The invention relates to the technical field of spectral imaging, in particular to a high-resolution snapshot hyperspectral imaging system and method based on deep learning. The system comprises a coding receiving module and an algorithm decoding reconstruction module. The coding receiving module comprises an imaging unit, a broadband multispectral filtering array and a detector; a target spectrum cube is imaged on the surface of the broadband multispectral filtering array through the imaging unit, the broadband multispectral filtering array performs spectral response coding on incident light and the incident light is received by the surface of the detector, and efficient coding compression from three-dimensional spectrum information to two-dimensional plane information is realized; the algorithm decoding reconstruction module comprises a spectrum reconstruction network; and combining the spectrum channel coding curve of the broadband multispectral filtering array with the data received by the detector, and inputting the combined data into a spectrum reconstruction network to obtain a high-quality spectrum cube. The method has the advantages that coding and decoding are jointly designed, and the spectral imaging resolution is improved through super-structure surface forward design and neural network fusion of spectral reconstruction.

The invention relates to the technical field of multispectral imaging, in particular to a multispectral photon counting single-pixel imaging device and method, the imaging device comprises a detection assembly and a processing assembly, and the detection assembly comprises a laser source loading optical pulses at a certain frequency; the spatial light modulator is used for undersampling according to the loaded negative W-based pattern to obtain a light signal of the to-be-detected object; the time domain disperser is used for dividing each optical signal into light splitting signals belonging to m spectral bands according to wavelength mapping; the photoelectric detector linear array comprises m detection elements arranged in a linear array, and the m detection elements are used for respectively detecting light intensity signals of the light splitting signals in the corresponding spectral bands to obtain m groups of light intensity signals; the processing assembly collects light intensity signals according to spectral bands and reconstructs spectral images according to the light intensity signals of each spectral band, and m spectral images are obtained. According to the invention, the imaging time is shortened, the imaging cost is reduced, and the multispectral imaging effect in a photon sparse application scene is realized.

The invention discloses a stress regulation-based micro spectrometer system of a transparent polymer material. The system comprises a polarization modulation unit, a transparent polymer layer, an imaging detector and a spectrum reconstruction module. The transparent polymer material is stretched by a specific design and then is arranged between the two polarizing films of the polarization modulation unit, and the imaging detector chip is arranged at the bottom layer of the device. And the spectrum reconstruction module performs spectrum reconstruction on the data received by the imaging detector by applying a calculation spectrum reconstruction algorithm to restore the original spectrum data received by the whole device. According to the technical scheme, a new spectrum detection thought is provided, and high-resolution spectrum analysis can be carried out in each wave band while the size of a miniature device is ensured by adjusting the applicable wave band of each component.

In a general aspect, a portable quantum spectrum sensing system for detecting electromagnetic radiation in an environment is presented. In some implementations, a portable system includes a vapor cell sensor and a portable control package. The vapor cell sensor includes a vapor and is configured to generate output optical signals based on interactions between input optical signals, the vapor and the electromagnetic radiation. The portable control package includes a laser system configured to generate laser signals and a photonic integrated circuit system configured to generate the input optical signals based on the laser signals from the laser system. The portable control package includes a system-on-chip that can communicate control signals to the laser system and the photonic integrated circuit system. The system-on-chip can also process the output optical signals to determine one or more properties of the electromagnetic radiation.

Provided is a time-stretch spectroscopy device capable of restoring an original spectrum without using a high-speed modulation system or reception system even if temporally adjacent pulses overlap after stretching. This time-stretch spectroscopy device comprises: an optical modulator that performs intensity modulation in pulse units on a group of measurement light pulses, which are obtained by irradiating a measurement object having characteristics relating to light transmittance or reflectance with a group of light pulses; a pulse stretcher that performs time stretching on the group of measurement light pulses; and a signal processing device that, with the assumption that the measurement light pulses are sparse as data, performs a reconfiguration estimating pulse signal wavelength components corresponding to the stretched light pulses, which are obtained by individually time stretching the group of measurement light pulses, in light of a superimposition signal synthesized such that a temporal overlap occurs after the time stretching.

The utility model discloses a self-calibration multi-grating monochromator. The self-calibration multi-grating monochromator comprises a self-calibration assembly, a grating spectrum system assembly and an optical receiver. The self-calibration assembly comprises a focus lens, a standard light source and a single-face reflector. And the standard light source is used for emitting a light beam with a specified wavelength to the single-sided reflector. And the single-sided reflector is used for reflecting the light beam to the focus lens, and the light beam is focused to the incident end of the grating spectrum system assembly through the focus lens. According to the utility model, an automatic calibration structure composed of the standard light source and the single-sided reflector is arranged at the incident end of the grating spectrum system assembly, so that the monochromator can emit a light beam with a specified wavelength through the standard light source when being used for a long time, and automatic calibration of the grating spectrum system assembly is realized in cooperation with the light receiver. Besides, the single-sided reflector is installed on the sliding rotary table, so that the single-sided reflector gives way when the grating spectrum system assembly is normally used, and interference with external light is avoided when the grating spectrum system assembly is normally used.

The invention relates to the field of infrared spectrum detection integrated chips, in particular to a metasurface coupling dynamic filtering infrared tunable spectrum encoder which comprises a fixed mirror, a movable mirror and a supporting layer. The moving mirror is of a folding cantilever structure. The movable mirror and the fixed mirror are bonded with each other. The supporting layer is located between the movable mirror and the fixed mirror and supports the movable mirror and the fixed mirror, a suspension layer is formed between the movable mirror and the fixed mirror, electrode connection between the movable mirror and the fixed mirror is completed, and the first-stage dynamic tuning function is completed. And the fixed mirror and the movable mirror electrode are connected to an external circuit. When an external circuit applies bias voltage to the fixed mirror and the movable mirror, the folding cantilever structure is bent, the height of the suspension layer is changed, and filtering tuning is achieved. A more stable suspended micro-bridge structure is adopted, the filtering structure is more compact, and a filtering optical channel with a larger area is obtained. A metasurface light splitting structure is also integrated, namely, a multi-stage dynamic light splitting coding effect is achieved, and a fine bandwidth spectrum effect is achieved. And meanwhile, the metasurface light splitting structure comprehensively utilizes incident light.

A portable device which detects a Raman signal from an analyte of interest contained in or suspected to contain in a sample. The portable device includes a laser source in optical communication with a dichroic mirror, an objective lens optically positioned to consolidate the laser from the laser source to the sample, (i) a pair of rotatable filters in optical communication with the dichroic mirror and an optical transmission module or (ii) a first band-pass filter in optical communication with the dichroic mirror and an optical transmission module, and a detector optically positioned to receive and detect a Raman signal produced from the laser incident on the analyte of interest. The dichroic mirror directs the laser from the laser source to the sample through the objective lens and transmits any Raman signal from the sample toward the detector. The detector is absent of a spectrometer and detects the Raman signal.

Optoelectronic measuring device (1) for frequency-resolved measurement of the intensity of electromagnetic radiation (10), comprising multiple measurement channels (M1, M2, ..., M m ), wherein a first of the measurement channels (M1) has a first spectral sensitivity and another of the measurement channels (M2, ..., M m ) exhibits another spectral sensitivity that differs from the first spectral sensitivity, and several collimators (K1, K2, ..., K k ) to collimate the electromagnetic radiation (10), wherein - through each of the collimators (K1, K2, ..., K k ) a separate optical path to one or more of the measurement channels (M1, M2, ..., M m ) runs and each of the measurement channels (M1, M2, ..., M m ) is arranged, an intensity of the collimators (K1, K2, ..., K) is arranged, an intensity of the collimators (K1, K2, ..., K k ) collimated electromagnetic radiation (10) to measure, - the optoelectronic measuring device (1) more collimators (K1, K2, ..., K k ) as measuring channels (M1, M2, ..., M m ) includes, and - the optoelectronic measuring device (1) comprises a radiation distribution means (3) which is set up and arranged to direct the electromagnetic radiation (10) onto the collimators (K1, K2, ..., K k ) to distribute, wherein the radiation distribution means (3) comprises a scattering element and / or an optical fiber.

To provide an inspection device capable of performing various inspections of an object to be measured quickly and accurately.SOLUTION: An inspection device comprises: a camera unit including illumination for illuminating an object to be measured and a spectral scanning type spectroscopic camera for imaging the object to be measured; a movable mechanism that changes a positional relationship between the object to be measured and the camera unit; and an inspection unit that performs inspection of the object to be measured on the basis of an image captured and acquired by the camera unit. The inspection device has a single-wavelength imaging mode for imaging the object to be measured at a single wavelength and a multi-wavelength imaging mode for imaging the object to be measured at multiple wavelengths. While switching between the single-wavelength imaging mode and the multi-wavelength imaging mode and changing the positional relationship between the object to be measured and the camera unit by means of the movable mechanism, the camera unit images a predetermined portion of the object to be measured.SELECTED DRAWING: Figure 1

The present invention provides a light source device and method that utilizes a parallel optical module including an axicon lens to efficiently collect diverging light, collimate it, and adjust the wavelength of the desired light to pass through. A tunable wavelength light source device according to one embodiment of the present invention includes a diffused light source that irradiates diffused light, a parallel light module that collimates the light irradiated from the diffused light source, the parallel light module including an axicon lens, an angle-adjustable bandpass filter module that passes light that has passed through the parallel light module and selects a specific wavelength of the light, and a mixing module that corrects an error in wavelength that is determined by the angle of incidence of light that passes through the angle-adjustable bandpass filter module.

The invention provides a system and method for enhancing the spectrum demodulation rate of a dual-optical-frequency comb, and the system comprises a circulation light path which carries out the light splitting of excitation pulse light which is inputted to the circulation light path and corresponds to a first repetition frequency, thereby enabling one part of the excitation pulse light to be outputted towards a unit to be detected, and enabling the other part of the excitation pulse light to circulate along the circulation light path; the to-be-tested unit is used for modulating the excitation pulse light and outputting processing signal light carrying dynamic spectrum information generated based on an actual dynamic spectrum of the to-be-tested unit; the light combining unit is used for coupling the processing signal light and the sampling pulse light and outputting coupled signal light; the photoelectric detector performs light field cross-correlation-based detection on the coupled signal light and outputs a periodic electric signal; and the data acquisition and processing unit processes the periodic electric signal to obtain an actual dynamic spectrum corresponding to the unit to be detected. The detection efficiency is at least improved.

The invention discloses a phase change material spectrum modulator based on Bayesian optimization and a long-wave infrared spectrum imaging system. According to the invention, a GSST and Sb2S3 double-layer circular nano-column structure is adopted as a main structural unit of the phase change material metasurface spectrum modulator, 25 different metasurface phase states are realized through light regulation and control of crystal fractions of the two materials, a plurality of spectrum modulation states are dynamically generated, and structural parameters of the phase change material metasurface spectrum modulator are automatically optimized through a Bayesian optimization algorithm. The imaging system comprises a spectrum modulation part and a calculation reconstruction part. The phase-change material metasurface spectrum modulator is directly integrated with an infrared detector pixel, so that single snapshot type information acquisition can be carried out while dynamic spectrum coding is realized; and the Transform encoder is used for carrying out end-to-end reconstruction on the modulation signal and outputting a high-precision space-spectrum three-dimensional data cube. The imaging system has the characteristics of micron size, multiple modulation states, high sampling efficiency, excellent reconstruction quality, high spectral resolution and the like.

The present disclosure relates to a novel liquid crystal assembly for use in multispectral imaging systems. In particular, the liquid crystal assembly includes an engineered polarizer and a liquid crystal. In various aspects, the liquid crystal assembly takes advantages of short-comings found in conventional polarizers and liquid crystals requiring complex temperature regulation.

A gas sensor (100) is described, which comprises a gas absorption cell (6), configured to house a gas to be detected, an incandescent light bulb (1) comprising a glass bulb (2) and a filament (3) enclosed in the glass bulb (2). The gas sensor (100) also comprises a first detector (4), configured to detect radiation in a first wavelength range of 1-5 um, and a control unit (7), configured to provide a drive current through the filament (3) of the incandescent light bulb (1) during operation of the gas sensor (100). The gas sensor comprises a second detector (5), configured to detect radiation in a second wavelength range of 6-15 µm radiation. The second detector (5) is arranged such that the second detector (5) is illuminated by radiation from the incandescent light bulb (1) during operation of the gas sensor (100).

An optical fiber coupler 5 is an optical element for separating light whose wavelength is to be measured, and includes a first optical fiber 20 allowing light having a predetermined center wavelength to propagate, and a second optical fiber 30 having a coupling region 50 coupled to the first optical fiber 20, in which the center wavelength of the light allowed to propagate through the first optical fiber 20 is a wavelength at which a transmittance in the coupling region 50 is within a range of 10% to 90%, and the light is transmitted and reflected according to a wavelength in the coupling region 50.

A device (1) for determining characteristics of a surface of a test object (4) is provided. The device (1) comprises a light source (2) for irradiating a test object (4) with a light beam (LB1), at least one angle-sensitive optical element (6) for reflecting and / or transmitting the light beam (LB2) reflected and / or transmitted by the test object (4), an adjustment unit (7) for adjusting an orientation of the at least one angle-sensitive optical element (6) with respect to the light beam (LB2) reflected and / or transmitted by the test object (4), a detection unit (9) for detecting the light beam (LB3) reflected and / or transmitted by the at least one angle-sensitive optical element (6), and an analysis unit (10). The analysis unit (10) is configured to receive (S3) detection data provided by the detection unit (9), wherein the detection data comprises data of the detected light beam (LB3) reflected and / or transmitted by the at least one angle-sensitive optical element (6) at multiple different orientations of the at least one angle-sensitive optical element (6), analyze (S4) the received detection data in order to identify differences between the data at the multiple different orientations of the at least one angle-sensitive optical element (6), and determine (S5) the characteristics of the surface of the test object (4) based on the identified differences.

The invention relates to a compact multi-channel parallel spectrum detection system and method. The method comprises the following steps: sequentially carrying out a collimation process and a dispersion process on optical signals of a plurality of channels arranged in a one-dimensional linear space; using the same focusing correction process to process the dispersed light beams from all the channels at the same time so as to form a plurality of spectral lines which are spatially isolated from one another on a detection surface; wherein the focusing correction process is configured to compensate for aberration introduced by the one-dimensional space arrangement for off-axis channels; and compact optical path layout is adopted in the collimation process, the dispersion process and the focusing correction process. Through the specially optimized aberration correction focusing module, the problem of off-axis aberration in multi-channel spectrum detection is successfully solved.

A method, wherein an optical input signal is received. The optical input signal includes an optical signal power and an input optical spectrum. The optical input signal is split into a first optical replica of the optical input signal and a second optical replica of the optical input signal. The first optical replica of the optical input signal is transmitted through a fiber laser cavity. A portion of the at least one lasing mode is transmitted from the fiber laser cavity to an optical heterodyne receiver, and the second optical replica of the optical input signal is transmitted to the optical heterodyne receiver. An electrical output signal including an output electrical spectrum is generated. The output electrical spectrum includes a compressed replica of the input optical spectrum. A measurement of the input optical spectrum is determined based on a respective Brillouin frequency shift and at least one input frequency.

There is described a system and method for measuring properties of water, such as surface water at site. That site may be in an agricultural setting. The properties of water, such as surface water may include nitrates and / or dissolved organic carbons. An example system may comprise a light source configured to emit a broadband source signal comprising a particular bandwidth for use in measuring a range of particular properties of water as well as an optical device configure to split the source signal into a measurement signal, and a corresponding reference signal. The system may also comprise a sensor unit configured to communicate a measurement signal through water at the sensor unit (e.g., when located in a stream), and a spectrometer configured to receive both a measurement signal having been communicated through water at the sensor unit and a reference signal from the optical device. Such a spectrometer may be configured to separate received measurement signals and reference signals into common component wavelengths, those common component wavelengths being associated with expected properties of water; and the system may be further configured to use respective component wavelengths of a measurement signal together with those of a reference signal to determine one or more particular properties of measured water.

The utility model discloses an imaging spectrometer monochromator convenient to install and adjust, which relates to the technical field of optical instruments and comprises a fixed bottom plate, and an entrance slit group, a collimation imaging light path group, a grating group, a focusing imaging light path group and a detector assembly which are fixed on the fixed bottom plate and are sequentially distributed on a light path, the entrance slit group is connected to the fixed bottom plate through the slit adjusting plate; the collimation imaging light path group and the focusing imaging light path group are arranged on the fixed bottom plate through the support adjusting assembly; the grating group is connected to the fixed bottom plate through a grating adjusting plate; and each component can be finely adjusted. The assembling and adjusting operation is simpler, more convenient and faster, and the consistency, the reliability and the production efficiency are improved.

An imaging device includes a first layer made of quantum dots and a second layer including at least two filter regions extending over the first layer. The at least two filter regions are configured to transmit distinct wavelengths. The quantum dots of the first layer are configured to generate charges upon reception of light in the distinct wavelengths.

The invention is directed to a diaminotrisphenol compound according to the following formula: following formula: wherein R1 and R2 are hydrogen or a substituent, R3 is a hydroxyl group, carboxylic acid group, an ester group or a group comprising alkyl(trialkoxy)silane or alkyltrichlorosilane and wherein n is 2 or 3 and m is 2 or higher.

Provided are an optical signal receiver and an optical signal receiving method for simplifying a configuration necessary for signal detection. An optical signal receiver is provided with: a sampling signal generation unit (11) that generates a sampling signal comprising optical signals having a plurality of wavelengths in a prescribed pattern; a sampling processing unit (13) that generates a plurality of optical signals by sampling the sampling signal; and a signal aggregation unit (14) that generates a plurality of aggregated optical signals by aggregating, for the plurality of optical signals, the optical signals having the plurality of wavelengths in accordance with the prescribed pattern of the plurality of wavelengths included in the sampling signal.