202results about "Spectrum generation" patented technology

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.

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.

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.

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.

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.

The embodiment of the present application discloses a kind of interference hyperspectral stripe removal method and device.The method comprises: according to the data characteristics of interferometric spectrometer, the original interference data cube of each scene image is arranged in sequence according to row direction;MNF transformation is carried out to the original interference data after arrangement, and transformed interference data cube is obtained;From the transformed interference data cube, interference data cube without ghost image is screened out;Spectral restoration processing is carried out to the interference data cube, and spectral image is obtained.The embodiment of the present application removes the stripe noise caused by parasitic ghost image by combining minimum noise separation, well meets the spectral quality demand of interferometric imager data processing, improves the signal-to-noise ratio and spectral accuracy of satellite interferometric imager data processing.

A spectroscopic device includes: an analysis optical system; a length measurement optical system; and a calculation device. The analysis optical system includes a moving mirror and a first light receiving element. The length measurement optical system includes a second light source configured to emit laser light, a gas cell with a gas that absorbs light of a predetermined wavelength sealed therein and configured to cause the laser light to be incident thereon, an emitted light amount detection unit configured to detect an amount of light emitted from the gas cell and output an emitted light amount detection signal, a light source control unit configured to control a wavelength of the laser light based on the emitted light amount detection signal, and a length measurement unit configured to use the laser light to obtain a displacement signal corresponding to a position of the moving mirror, and the calculation device includes a moving mirror position calculation unit, a light intensity calculation unit, and a Fourier transform unit configured to generate a spectral pattern.

The utility model relates to the technical field of optical instruments, in particular to a two-dimensional adjustable optical slit device which comprises a base, two containing cavities are symmetrically formed in the base, and a partition plate is formed between the two containing cavities. A blade is arranged in each containing cavity, a rotating shaft transversely penetrates through the blades, positioning columns are arranged at the two ends of the rotating shaft, sliding grooves are formed in the front inner wall and the rear inner wall of each containing cavity, and the positioning columns are inserted into the sliding grooves and slide in the sliding grooves. The end, extending out of the sliding groove, of the positioning column is fixedly connected with a supporting plate, the supporting plate is connected with a sliding plate arranged on the base in a sliding mode, and the sliding plate is provided with a spiral micrometer head. The positioning column moves along the sliding groove to achieve large-range position adjustment, the spiral micrometer head is responsible for high-precision slit width control, transverse and tangential two-dimensional adjustment is achieved, efficiency and precision are both considered, the slit width and the center position can be simply and accurately adjusted, and the structure is simple and practical.

The utility model discloses a manual ultraviolet monochromator assembly, which relates to the field of monochromators, and comprises a monochromator shell, the manual monochromator assembly used for adjusting monochromatic light is arranged behind the monochromator shell, the manual monochromator assembly comprises a manual wavelength knob, the top of the monochromator shell is fixedly connected with a lamp chamber shell, and the lamp chamber shell is fixedly connected with a light source. An automatic light searching assembly used for automatically searching light is arranged on the front face of the top of the lamp chamber shell. The automatic light searching assembly comprises a reflector motor body. A deuterium lamp holder is fixedly installed on the front face of the lamp chamber shell, and a deuterium lamp body is fixedly connected to the position, located in the monochromator shell, of the rear face of the deuterium lamp holder. By arranging the deuterium lamp body, the tungsten lamp body and the reflector motor body, automatic light searching and automatic light source switching of the ultraviolet monochromator can be achieved, the sun shield is arranged, unnecessary light can be shielded, the manual wavelength knob and the filter disc motor body are arranged, and wavelength can be manually and flexibly selected and accurately controlled.

An image processing apparatus is provided. The image processing apparatus has a first substrate provided with a light-receiving element, a second substrate provided with a plurality of light-emitting elements, a third substrate provided with a power supply circuit, and a housing that houses the first substrate, the second substrate, and the third substrate, the first substrate has a first surface and a second surface, and is disposed between the third substrate and the second substrate in a first direction orthogonal to the first surface, the light-receiving element is disposed on the second surface, the second substrate has a third surface, a fourth surface, and an opening portion, the third surface faces the second surface, and the second substrate is disposed such that the opening portion overlaps the light-receiving element in the first direction, the plurality of light-emitting elements are disposed on the fourth surface in a manner surrounding the opening portion, and the power supply circuit is disposed on the third substrate in a manner not overlapping the light-receiving element in the first direction.

A photothermal converter using a wavelength selective perfect absorber made of a low-loss metal material or dielectric and a heat detection sensor are combined to develop a sensor that efficiently converts light of a specific wavelength into heat and further electrically detects the heat. Here, since the wavelength selective perfect absorber of the present invention has a periodic structure, it has high directivity, and can also be used as a small motion sensor or a watching sensor using detection of thermal radiation. In addition, it can also be used as a high-precision small position sensor by being combined with a laser light source matching the resonance wavelength of the sensor.

Disclosed is a wavelength selection module for a metrology apparatus. The wavelength selection module comprises one or more filter elements being operable to receive an input radiation beam comprising multiple wavelengths to provide selective control of a wavelength characteristic of a corresponding output radiation beam. At least one of said one or more filter elements comprises at least two linear variable filters.

The present disclosure provides an integrating-sphere-assisted resonance synchronous (ISARS) spectroscopy method performed with an ISARS spectrophotometer, for example, a spectrofluorometer equipped with an integrating-sphere accessory. The methods and systems of the present disclosure utilize the ISARS spectrophotometer equipped with an integrating sphere to determine the ISARS spectral intensity, quantify the ISARS-based absorbance, and subsequently evaluate the sample's double-beam UV-vis absorbance spectrum (also known as the absorption extinction spectrum). This ISARS method enables quantitative separation of light absorption and scattering contribution to the sample UV-vis extinction spectrum measured with double-beam UV-vis spectrophotometer.