631results about "Spectrum generation using diffraction elements" patented technology

The invention belongs to the technical field of optical instruments, and particularly discloses a C-T light path structure suitable for a near-infrared band Raman spectrometer and application, and the C-T light path structure comprises an entrance slit unit, a self-adaptive aperture unit, a collimation unit, a diffraction unit, a focusing unit and a detection unit; the adaptive aperture unit is located behind the entrance slit unit and coincides with an object space focal plane of the collimation unit, the diffraction unit is located on a reflection light path of the collimation unit, and the detection unit is located on an image space focal plane of the focusing unit; the entrance slit unit comprises an entrance slit which is connected with an SMA905 optical fiber; the self-adaptive aperture unit comprises a diaphragm, the collimation unit comprises a collimating mirror, the diffraction unit comprises a plane scribed line diffraction grating, and the focusing unit comprises a focusing mirror and a cylindrical mirror. The optical path system provided by the invention not only realizes a compact structure, but also ensures the stability, high resolution and detection precision of the system.

The invention relates to a method for calibrating a light source and a spectrometer. A calibration light source includes: a broadband light source that emits light in a broad spectral range; and a filter receiving the light emitted by the broadband light source and providing structured light by applying an attenuation pattern on the received light exhibiting pattern characteristics at a plurality of spectral reference lines, the calibration light source is configured such that the emission spectrum of the structured light emitted by the calibration light source exhibits unique identifiable emission spectrum characteristics corresponding to the mode characteristics at a plurality of spectral reference lines. A method of calibrating at least one spectrometer using the calibration light source is also disclosed.

A calibration light source includes: a broad band light source emitting light in a broad spectral range; and a filter receiving light emitted by the broad band light source and providing structured light by imposing an attenuation pattern exhibiting pattern features at multiple spectral reference lines on the received light such that an emission spectrum of the structured light emitted by the calibration light source exhibits distinct, identifiable emission spectrum features corresponding to the pattern features at the multiple spectral reference lines. A method of calibrating at least one spectrometer using the calibration light source is further disclosed.

The utility model discloses an echelle grating spectrometer based on a digital micromirror device, which belongs to the technical field of spectrometers and comprises an echelle grating spectrometer, a digital micromirror, a reflection focusing mirror, a photomultiplier, a data acquisition card and an upper computer. The light is spatially modulated through a digital micromirror, the light is focused on a photomultiplier, and information is received by a data acquisition card; time sequence synchronization of the digital micromirror and the data acquisition card is completed by transmitting a synchronizing signal of the digital micromirror to the data acquisition card, and meanwhile, an overturning mode of the digital micromirror is designed, so that rapid scanning imaging is realized. According to the echelle grating spectrometer based on the digital micromirror device, the cost is reduced, and the time for acquiring spectral information is shortened.

This invention relates to the field of optical imaging and detection technology, specifically providing a broadband snapshot-type polarization interferometry imaging detection system and method for breast tumors. A broadband light source illuminates a breast tumor tissue sample. The reflected signal light is collected and collimated by a pre-optical system, then sequentially passes through a first and a second ray shaping unit for two shearing and two polarization state transformations, resulting in two beams of linearly polarized light and two beams of circularly polarized light. These beams are imaged by an imaging lens to an area array detector to obtain a polarization interferogram, which is then demodulated to obtain all Stokes parameters of the breast tumor tissue sample. This invention achieves broadband snapshot imaging of breast tumors with all Stokes parameters without using an analyzer, doubling the light throughput compared to traditional polarization imaging instruments using analyzers. Furthermore, this invention has advantages such as compact structure, no moving parts, easy assembly and adjustment, and no need for image registration.

A spectrometer for detecting an electromagnetic (EM) wave spectrum having one or more wavelength components within a spectral band of interest, a method of detecting an electromagnetic (EM) wave spectrum having one or more wavelength components within a spectral band of interest, and a method of constructing the spectrometer. The method comprises the steps of creating dispersed images of an entrance aperture on a plane of an exit aperture, such that respective images at the different wavelength components are offset by different amounts of displacements along a direction of dispersion; gathering a first EM wave energy incident on the entrance aperture to an EM detector; gathering a second EM wave energy that exits the exit aperture to the at least one single-pixel detector; and measuring the output of the EM detector and the output of the at least one single pixel detector for reconstructing the EM wave spectrum taking into account an intensity distribution of an incident EM wave on the entrance aperture.

Provided is an image display apparatus capable of detecting the amount of light of each wavelength of the ambient light transmitted through the image display panel with high accuracy in an image display apparatus including an image display panel and an ambient light sensor system. An image display apparatus includes an image display panel and an ambient light sensor system, in which the image display panel includes a transmission unit that allows ambient light to pass through in a display region. The ambient light sensor system includes a diffraction grating that diffracts light of each wavelength component at different angles according to a wavelength of the ambient light that has passed through the transmission unit, and a light detection unit that receives the light diffracted by the diffraction grating.

The invention discloses a high-resolution scanning spectrometer based on a linear array detector and a use method, and belongs to the technical field of spectrum instruments and spectral analysis. The first aspherical mirror is used for reducing the diameter of a light beam emitted by the light source, and the second aspherical mirror is used for collimating effective wave band light passing through the slit into parallel light beams; the plane scribed grating is used for diffracting the light beam; the reflection system is used for reflecting the light beam to enable the light beam to enter the plane scribed grating again for secondary diffraction; the first spherical mirror is used for collimating light beams passing through the first aspherical mirror, the second spherical mirror is used for converging the light beams diffracted for the first time at the slit, and the third spherical mirror is used for converging the light beams diffracted for the second time into the linear array photoelectric detector. The advantages of a light splitting type spectrograph and a scanning type spectrograph are combined, a reflection type light path structure is adopted, extra aberration introduced by a transmission type light path is avoided, the data acquisition efficiency is improved, and high-quality imaging is guaranteed.

The technology provides a method and apparatus for standardizing spectral resolution across multiple spectrometers using custom input slit dimensions. A plate with a slit may be replaced to provide various slit widths to obtain desired spectrometer resolution. Alternatively, the plate may include an adjustable slit width that is mechanically adjusted over a desired range of values. The slit width may be adjusted by discrete increment amounts determined based on an end application. A resolution of a tunable spectrometer may be calibrated to match a reference spectrometer by customizing a slit width value. The technology enhances the accuracy of spectral classification algorithms by minimizing variability of Raman spectra introduced by spectrometer component differences in lenses, gratings, and detectors, for example.

A hyperspectral imaging device includes an optical channel arranged to focus light at a first image plane. A spectrometer includes a slit formed at the first image plane to allow a slit-shaped portion of the light pass through. A dispersive element receives light from the slit and spectrally disperses it along a direction perpendicular to a width of the slit. A focusing lens focuses the spectrally dispersed light at a second image plane such that the spectral dispersion is imaged along a first axis thereof, and a spatial image of the slit width is imaged along a second axis for detection by a sensor. A sliding lens group between the optical channel and the first image plane moves to direct the incident light, scanning the entire image over the slit such that multiple frames acquired by the sensor each correspond to a horizontal line of the image.

Disclosed are a hyperspectral imaging method and an apparatus thereof. A method of reconstructing a hyperspectral image includes receiving an image photographed through a diffractive optical element and reconstructing a hyperspectral image of the received image based on the received image and information about a point spread function for each wavelength of the diffractive optical element. The diffractive optical element may generate an anisotropic shape of the point spread function that varies with a spectrum.

The invention belongs to the field of spectral measurement and imaging, and particularly discloses a single-photon detection device and a rapid spectrum and imaging system based on the single-photon detection device. According to the invention, the transmission-type optical fiber spectrometer separates polychromatic light of each wave band in space according to the wavelength, couples photons of different wavelengths into the optical fiber array for time delay, delays different wavelengths to different moments, and outputs the time to the single-photon detection device; the single-photon detection device converts photons of different wavelengths which arrive in time in sequence into electric signals, the number of photons at different moments is obtained after amplification and signal processing, and the photons are converted into spectrums. As the transmission-type spectrometer can provide higher diffraction efficiency, higher spectral resolution and higher signal intensity, and the single-photon detection device can provide a faster and more accurate photon discrimination and photon counting method, compared with the prior art, the spectrum can be measured more quickly on the whole, and higher spectral resolution and higher signal intensity are achieved.

Disclosed herein are scientific instrument support systems, related methods, computing devices and computer-readable media. A method of mitigating distortion of an optical emission spectrum obtained from an optical emission spectrometer is provided. The method may comprise a step of obtaining a spectrum recorded with the spectrometer and a respective one or more condition parameters indicative of an operating condition at a time of recording the spectrum. The method may further comprise a step of providing a model configured to output, in response to the one or more condition parameters, one or more transform parameters of a transformation to be applied to the obtained spectrum. A transformation may be applied in accordance with the obtained one or more transform parameters to the obtained spectrum to mitigate distortion of the spectrum due to a discrepancy between the operating condition and a baseline operating condition.

Example embodiments provide a biomedical illumination device enabling multiwavelength laser line generation with automated beam alignment. The biomedical illumination device may include a plurality of laser light sources configured to provide beams of one or more wavelengths, wherein one or more of the beams are directed towards one or more actuator-controlled mirrors; the one or more actuator-controlled mirrors configured to steer the one or more beams for passing through a beam shaping element, wherein for each of the one or more beams at least one actuator-controlled mirror is configured for steering the respective beam automatically according to instructions received from a control device; the beam shaping element configured to output a beam pattern having a certain geometry for illumination of a microscopic sample based on the steered beams; and the control device configured to monitor the beams output from the beam shaping element to determine a position of the output beam pattern in relation to a target beam pattern position at the sample; determine instructions for one or more of the actuator-controlled mirrors to tilt in at least one axis based on a difference between the monitored position of the output beam pattern and the target beam pattern position at the microscopic sample; and transmit the instructions to the one or more actuator-controlled mirrors.

The invention is suitable for the field of electrochemical luminescence detection equipment, and provides a dispersion device suitable for electrochemical luminescence detection, which comprises a monochromator body, the monochromator body is composed of a monochromator housing, a reflector assembly, a grating assembly, a collimating mirror assembly, a focus lens assembly, a slit, a flange snap ring and a flange; an M-shaped light path is arranged in the monochromator body, and a slit, a reflector assembly, a collimating mirror M1 in the collimating mirror assembly, a customized blazed grating G1 in the grating assembly and a focusing mirror M2 in the focusing mirror assembly are sequentially arranged in the light propagation direction. The customized blazed grating G1 is designed by adopting specific parameters including the scribed line density, the blazed wavelength, the notch groove depth and the groove width ratio, and primary light energy enhancement and secondary light intensity suppression can be realized; according to the invention, an optical filter is not needed, the diffraction efficiency of a monochromator is improved to 60-86%, the intensity ratio of luminol secondary light to primary light is less than or equal to 1.6%, the detection limit of ruthenium bipyridine is reduced from 100pmol / L to 50pmol / L, and the electrochemical luminescence detection device is suitable for various electrochemical luminescence detection scenes.

A camera system and a corresponding encoder mask are presented. The camera system comprises: a detector array comprising a plurality of light sensitive pixels, an encoder mask comprising an array of a plurality of similar unit cells having selected encoder pattern, and a lens arrangement comprising one or more optical lenses positioned for imaging input light onto said encoder mask. Each of the plurality of similar unit cells carries an encoding pattern having at least first and second axes of symmetry. Alternatively, or additionally, the unit cells of said encoder mask are larger than a diffraction limited spot defined by the lens arrangement and the encoder mask is displaced from image plane defined by the lens arrangement thereby allowing for optical spot to cover a unit cell of said encoder mask.

The invention discloses a calculation spectrometer based on a random multimode waveguide grating and a spectrum reconstruction method. Comprising a silicon substrate layer, a silicon dioxide buried oxide layer, a lithium niobate waveguide layer, a silicon dioxide coating layer and an interdigital electrode which are sequentially stacked from bottom to top, a mode multiplexer, a multi-mode waveguide spiral line and multi-mode waveguide gratings are formed on the lithium niobate waveguide layer, the mode multiplexer is communicated with the multi-mode waveguide spiral line, the multi-mode waveguide spiral line at least comprises a section of multi-mode straight waveguide, a plurality of non-periodically distributed multi-mode waveguide gratings are arranged on the multi-mode straight waveguide, and the multi-mode waveguide gratings are arranged on the multi-mode straight waveguide. And each multimode waveguide grating unit adopts a Bragg grating structure and comprises two groups of grating tooth structures which are respectively positioned on two sides of the multimode straight waveguide. According to the invention, the electrical control logic can be simplified, the disordered resonance of different modes in the spiral line can provide high spectral reconstruction resolution, and meanwhile, the lithium niobate electro-optical modulation can realize rapid and low-power consumption measurement channel scanning.

A calibration light source includes: a broadband light source that emits light in a broad spectral range; and a filter that receives light emitted by the broadband light source and provides structured light by imparting an attenuation pattern to the received light that has pattern features at a plurality of spectral reference lines, such that an emission spectrum of the structured light emitted by the calibration light source has identifiable emission spectrum features that correspond to the pattern features at the plurality of spectral reference lines. Furthermore, a method for calibrating at least one spectrometer using the calibration light source is disclosed.

The invention relates to a rotary adjuster (1) for a structure, in particular an optical element (3), preferably a grating and / or mirror with - at least one rotary table with at least one turntable - a drive connected to the rotary table, preferably comprising at least one motor and one gear and / or a motor-gear combination and a rotary mechanism The invention is characterized in that the rotary table comprises an angle measuring system for determining the angular position directly on the turntable, wherein the angle measuring system is preferably an absolute measuring system.

In general, in one aspect, the invention features a method of fluorescence spectroscopy including providing a high-performance sensor that combines imaging with high intrinsic time resolution and high

Optical device 100 comprises: separating element 102; in aspects, dispersive element 104; and optical elements 106. The separating element separates an optical signal into spectral bands, each having

The invention provides a wavelength calibration method, a calibration sample, and a program product. The wavelength calibration method is a wavelength calibration method for a multicolor spectrometer provided with a diffraction grating and a detector at which light dispersed by the diffraction grating is imaged. The wavelength calibration method includes the steps of: providing light containing a known clear spectrum to a multicolor spectrometer, and acquiring a first measurement result output from a detector; a second measurement unit that supplies reflected light or transmitted light to the multicolor spectrometer, said reflected light or transmitted light being generated by irradiating a calibration sample having a gap provided therein with light, and acquires a second measurement result output from the detector; determining a wavelength table such that the position of the known clear spectrum in the first measurement result matches the wavelength of the known clear spectrum; and repeating the update of the wavelength table so as to minimize an error calculated on the basis of the second measurement result and the wavelength table.

A coherent light source 110 outputs coherent light including high-order harmonics obtained by irradiating short-pulse laser light to a nonlinear medium 4. A spectrometer 130 includes a grating 132 that diffracts the coherent light and an image sensor 134 that measures an image of the diffracted light. In a first state, a first double slit 150 having a pair of apertures spaced apart in a first direction is arranged at a predetermined position between coherent light source 110 and an incident slit of spectrometer 130. In a second state, a second double slit 152 that is a replica of first double slit 150 is arranged at the predetermined position as a replacement of first double slit 150 with a sample held in one aperture. A calculation processing device 200 calculates optical constants of the sample based on interference images measured in the first and second states.

A system and method using remote sensing instrument with hyper spectrum quantitatively measure metal dust elements in lubricating oil, which includes (not limited): Al, Cd, Cr, Cu, Fe, Pb, Mg, Mn, Mo, Ni, Ag, Sn, Ti, V, Zn, B (Boron, for Coolant), Ca (Calcium for water contaminant), and particle size, cone penetration, dropping point, steel mesh oil separation, moisture, PQ concentration, in few seconds. The instrument integrates near-field communication (NFC), Internet of Thing (IoT), Cloud computing, spectral matching and other data processing, and application software forming a system to easily operated and build a model enable self-learning to improve precision through collection accumulation. With the system, the instrument as FIG. 1 can provide comprehensive on-site analysis enable preventive maintenance of mission critical engine and rotating equipment. The characteristics of the system are easy to operate, get result quickly, and self-learning to improve precision.

A Raman spectroscopy apparatus comprises an imaging optical system that transmits light from an object to a spectrograph along an optical path. A scanning device intersects, and is movable with respect to, the optical path. Light is directed onto the scanning device to illuminate the object at a plurality of illumination points. The imaging optical system transmits Raman scattered light emitted from the object at the illumination points to an intermediate image plane, the scanning device being located at the intermediate image plane, and transmits the Raman scattered light from the intermediate image plane to the spectrograph. In comparison with conventional confocal Raman spectroscopy, the apparatus can perform Raman analysis of a sample more quickly, and in comparison with conventional line scan Raman spectroscopy the apparatus can perform Raman analysis more accurately.

To provide a plane spectroscopic device that is advantageous in downsizing, high resolution, or high efficiency.SOLUTION: An optical system to divide a light flux has: a first curved mirror provided with an opening part for passing the light flux from an object plane or a transmission part for transmitting the light flux; a second reflection part that has a plurality of reflection planes for dividing the light flux from the opening part or the transmission part of the first curved mirror, and reflects the light fluxes divided by the respective reflection planes to different positions of the first curved mirror; a third reflection part that includes a plurality of reflection planes that reflect the light fluxes divided by the second reflection part and reflected by the first curved mirror; and a fourth reflection part that includes a plurality of reflection planes that reflect light from the third reflection part. The number of reflection planes of each of the third reflection part and the fourth reflection part on which the light from the first curved mirror is incident is the same as the number of divisions of the light flux by the second reflection part, and each of the light fluxes reflected by the first curved mirror is reflected by the third reflection part and the fourth reflection part to form an image, and an image of the divided object plane is formed.SELECTED DRAWING: Figure 1

The application belongs to the field of spectral measurement and imaging, and specifically discloses a single-photon detection device and a rapid spectral and imaging system based on the same. According to the application, a transmission optical fiber spectrometer separates each waveband complex light according to wavelength in space, and couples the photons of different wavelengths into an optical fiber array for time delay, so that the different wavelengths are delayed to different time points and output to a single-photon detection device. The single-photon detection device converts the photons of different wavelengths arriving at the device in time sequence into electrical signals, and obtains the number of photons at different time points after amplification and signal processing, and converts the number of photons into a spectrum. Since the transmission spectrometer can provide higher diffraction efficiency, higher spectral resolution and signal strength, the single-photon detection device can provide a faster and more accurate photon discrimination and photon counting method, and compared with the prior art, the whole can measure the spectrum more quickly, and has higher spectral resolution and signal strength.

This application discloses a hyperspectral imaging method, electronic device, hyperspectral imager, and computer-readable medium based on a hyperspectral imaging module. The hyperspectral imaging module includes a light source, an optical imaging system, a spectral chip, and a photodetector. The spectral chip includes multiple spectral resolution units, each of which includes multiple cascaded active tunable spectral units and a phase modulator disposed on each active tunable spectral unit. Phase modulation parameters are determined for each phase modulator according to a preset spectral resolution method. Each phase modulation parameter is sent to the corresponding phase modulator. A driving signal is sent to the light source. Hyperspectral imaging data is obtained by resolution based on the electrical signal sent by the photodetector and the preset spectral resolution method. This method can not only reduce the cost and size of the hyperspectral imager, but also improve its resolution, reduce the computational complexity of the hyperspectral imager, and improve the real-time performance of data processing.

The invention provides a hyperspectral imaging system. The hyperspectral imaging system comprises a telescope group, a collimator objective, a prism, a volume holographic diffraction grating, an imaging objective and an imaging sensor which are arranged in sequence, the telescope group is composed of a primary reflector, a secondary reflector, a third reflector, a plane reflector and an entrance slit; the primary reflector, the secondary reflector and the third reflector form an off-axis three-reflector structure; the plane reflector is used for folding a light path; the collimating objective lens, the prism, the volume holographic diffraction grating, the imaging objective lens and the imaging sensor form an imaging spectrometer, and an entrance slit is used as object space input; the formed off-axis three-mirror and folded light path and an imaging spectrometer are in coaxial butt joint by taking an entrance slit as a node, and are used for joint correction and splicing to form a hyperspectral imaging system. According to the optical path architecture, optimal matching of the unobstructed total reflection front end and the transmission type rear end is realized, and the detection sensitivity of crop weak spectrum signals is greatly improved while a better modulation transfer function of a full view field is ensured.

The utility model provides a high-frequency monochromator, which is characterized by comprising a spectrograph and a scanning emitting mechanism, and the scanning emitting mechanism is loaded after the spectrograph emits a light beam. An entrance slit, a spectrograph, a field diaphragm, a collimation optical assembly, a rotary reflector or a rotary reflector with a grating light splitting function, a convergence imaging assembly and an exit slit are sequentially arranged along a light path, and light is emitted through the field diaphragm and the exit slit to form an L-shaped light path; the entrance slit, the spectrograph, the field diaphragm, the collimation optical assembly, the rotary reflecting mirror or the rotary reflecting mirror with the grating light splitting function, the convergence imaging assembly and the exit slit are all vertically fixed to the horizontal plane, and the rotary reflecting mirror or the rotary reflecting mirror with the grating light splitting function is arranged at the switching position of the L-shaped light path; the monochromator is simple in light splitting structure and efficient in light splitting.