537 results about "Spectrum imaging" patented technology

The invention is directed to methods and systems of hyperspectral and multispectral imaging of medical tissues. In particular, the invention is directed to new devices, tools and processes for the detection and evaluation of diseases and disorders such as, but not limited to diabetes and peripheral vascular disease, that incorporate hyperspectral or multispectral imaging.

A multi-spectrum, multi-channel imaging spectrometer includes two or more input slits or other light input devices, one for each of two or more input channels. The input slits are vertically and horizontally displaced, with respect to each other. The vertical displacements cause spectra from the two channels to be vertically displaced, with respect to each other, on a single image sensor on a stationary image plane. The horizontal displacements cause incident light beams from the respective input channels to strike a convex grating at different respective incidence angles and produce separate spectra having different respective spectral ranges. A retroflective spectrometer includes a convex grating that, by diffraction, disperses wavelengths of light at different angles and orders approximately back along an incident light beam. A single concave mirror reflects both the input channel and the dispersed spectrum. A prism, set of mirrors, beam splitters or other optical element(s) folds the input channel(s) of a spectrometer to enable the input(s) to be moved away from the plane of the image sensor, thereby enabling a large camera or other device to be attached to the spectrometer without blocking the input(s). A mounting mechanism enables a curved optical element to be adjusted through lateral and transverse translations, without requiring a gimbal mount.

The invention is directed to methods and systems of hyperspectral and multispectral imaging of medical tissues. In particular, the invention is directed to new devices, tools and processes for the detection and evaluation of diseases and disorders such as, but not limited to diabetes and peripheral vascular disease and cancer, that incorporate hyperspectral or multispectral imaging.

The invention relates to a nondestructive detection method for comprehensive character living bodies of plant seedlings, which comprises the following steps of: performing high-spectrum imaging on the plant seedlings, extracting RGB images and a spectrum of a specific area from a high-spectrum data cube, and acquiring morphological parameter, component content distribution and disease and insect pest information of the seedlings by image processing and spectrum analysis; and establishing a growth prediction model of the plant seedlings by adopting a character-level information fusion method and a fuzzy comprehensive judgment method. The method can realize comprehensive judgment on characters of appearance, nutritional component and disease and insect pest information of the seedlings, and overcome the error caused by un-uniformity during component measurement.

The invention is directed to methods and systems of hyperspectral and multispectral imaging of medical tissues. In particular, the invention is directed to new devices, tools and processes for the detection and evaluation of diseases and disorders such as, but not limited to diabetes and peripheral vascular disease, that incorporate hyperspectral or multispectral imaging.

The application features methods, devices, and systems for measuring blood flow in a subject. The computer-implemented methods include receiving functional magnetic resonance imaging (fMRI) data that provides information on at least one of volume or oxygenation of blood at one or more locations in a body over a first predetermined length of time. The methods also include receiving near-infrared spectroscopic (NIRS) imaging or measurement data representing at least one of blood concentration or oxygenation at a first portion of the body over a second predetermined length of time. The methods further include deriving, from the fMRI data corresponding to a second portion of the body, a time varying data set representing changes in blood oxygenation or volume or both blood oxygenation and volume at the second portion over the first predetermined length of time and determining, by a computing device, a time delay and a value of a similarity metric corresponding to a part of the spectroscopic imaging data that most closely matches the time varying data set. The time delay represents a difference between a first time in which blood flows from a third portion in the body to the first portion and a second time in which blood flows to the second portion from the third portion. The value of the similarity metric represents an amount of blood at the second portion. An estimate of a characteristic of at least one of blood flow or blood volume in the second portion at a given time is determined based on the time delay and the value of the similarity metric.

The invention belongs to the micro-spectrum imaging technical field and relates to a differential confocal raman spectral test method. The method integrates the technical characteristics of the differential confocal detection method and the raman spectral detection method, forms a test method capable of realizing sample microarea spectral detection, precisely catches focus positions of excitation light beams through the differential confocal technology, detects raman spectra of corresponding positions, simultaneously adopts a designed pupil filter, sharpens Airy disc major lobes of a differential confocal raman spectral system, improves the microarea raman spectral detectability and precisely acquires microarea space spectrum information which comprises spectral information and position information of microarea samples. The method obviously improves the microarea spectral detectability of a confocal raman spectromicroscope, has absolute tracking zero points and bipolar tracking characteristics, realizes absolute measurement of physical dimension, can be widely applied in the technical fields such as biomedicine, life sciences, biophysics, biochemistry, industrial precision detection and so on to perform high-precision detection of geometric positions and spectral characteristics of microareas, and has very important application prospect.

Disclosed system as an integrated system integrates micro imaging system with high spectrum imaging system, including optical microscope, spectroscope, area array CCD camera and dedicated software of data acquisition and treatment. The disclosed system provides microcosmic spectrogram combining image with spectrum, applicable to clinical medicine, biology, materials science and microelectronics.

The invention discloses a spectrum scaling apparatus used for a spectrum imager. The apparatus is characterized in that: a light beam which is emitted by a broadband light source (1) goes through a diaphragm (2) and a collimating lens (3) and irradiates a wavelength tuning optical filter (4), a plurality of narrowband optical signals which are distributed in a comb-shaped mode and have different wavelengths are outputted, after light intensity adjusting by a broadband bandpass optical filter (5), the signals enter into an integrating sphere (9) from an integrating sphere incident light hole (6) for depolarization and space uniformity processing, and an integrating sphere light extraction hole (8) outputs a surface light source. A spectrum imager to be measured is placed on the light extraction hole (8) for spectrum scaling. According to the apparatus, a birefringence crystal is utilized to carry out light transmission rate modulation, a passband peak value position and a bandwidth size can be adjusted, a plurality of narrowband light intensity signals changing with a wavelength are provided in a broadband range, wavelength scanning is not needed when carrying out spectrum scaling on the spectrum imager, wavelength scaling with one-time imaging is realized, and the apparatus is suitable for scaling a large field of view and large caliber spectrum imager.

An imaging system containing an electron-multiplying charge-coupled device detector and line-scan spectrograph is used for identifying wholesome and unwholesome freshly slaughtered chicken carcasses on high-speed commercial chicken processing lines. Multispectral imaging algorithms allow for real-time online identification of wholesome and unwholesome chicken carcasses.

The invention discloses a method for detecting abnormal conditions of rails and fasteners through double-spectrum imaging, which belongs to the technical field of rail transport safety detection, andis used for solving the problem of difficulty in detecting the abnormal conditions of rails and fasteners in the prior art. According to the method, a visible light camera and an infrared camera forma double-spectrum imaging device for performing double-spectrum imaging on the rail and fastener areas and respectively acquiring the texture images and infrared thermal images of the rails and the fasteners; the texture images are adopted for positioning the rails and fasteners in the infrared thermal images; the background model comparison is adopted for detecting the abnormal conditions of missing, loosening and breaking of the fasteners; the texture images and the infrared thermal images are jointly used for detecting the rail peeling, scratching, corrugation and cracks. According to the method disclosed by the invention, the abnormal detection efficiency for the rails and the fasteners is effectively promoted and the rail transit safety is guaranteed.

The invention relates to a multispectral face identification method, and a system thereof. The system is characterized by comprising a multispectral imaging system, a color camera, a face identification module, a data storage module, a central control module, and a spectrometer. The multispectral imaging system outputs filmed face image data to the face identification module. The face identification module identifies the face image data according to information in a standard face database in the data storage module, and then outputs an identification result. The central control module controls image filming of the multispectral imaging system and identification of the face identification module. The multispectral imaging system comprises an objective lens, a liquid crystal adjustable optical filter, and a CCD camera. The liquid crystal adjustable optical filter is disposed in front of a CCD camera lens of the CCD camera, and the objective lens is disposed on a front end of the liquid crystal adjustable optical filter. In the method, a plurality of characteristics of the face image is extracted, thereby making a between-class distance in an identification process more obvious and separability of identification algorithm better which help to improve identification effects.

The invention discloses a method and a system for wide-spectrum and high-resolution detection based on space-time light splitting in OCT. Low-coherence lights emitted from a broadband light source enter a broadband optical fiber coupler through an optical isolator, and respectively enter a scanning probe and a reference arm after light splitting by the coupler. The returned lights generate interference in the broadband optical fiber coupler, a detection arm detects interference signals after the interference signals are decomposed into different spectral components, and then the interference signals are sent to a computer so as to reconstruct a sample image. In the detection arm, interference spectral signals firstly pass through a time domain light splitting device with low resolution and wide free spectrum range, then pass through a space domain light splitting device with high resolution and narrow free spectrum range, and then are detected by a spectrum imaging system. On the premise of satisfying the requirement of high spectrum resolution, the invention can reduce a visual field of the spectrum imaging system, and solves the problems of field curvature, spectrum interference and the like existing during large visual field spectrum imaging, thereby spectral domain OCT imaging with high signal-to-noise ratio and high resolution is realized.

The invention discloses a real-time monitoring method for growth characters of tea trees in intensive cultivation. The method comprises the following steps: performing real-time data acquisition by a tea tree living body growth character data acquisition device based on online location, transmitting the acquired data to an artificial comprehensive management center through a wireless communication way to process, wherein the acquired data comprises current location data acquired by a locating mechanism, fresh tea leaves spectrum data acquired by a high spectrum imaging sensor, and average growth height of fresh tea leaves measured by an ultrasonic wave sensor, and judging the best fresh tea leaf picking time based on that the data and a picking judgment model established off line are combined by the artificial comprehensive management center. The picking judgment model comprises a bud size growth measurement model based on average growth height, a yield correlation model and a quality correlation model based on the high spectrum image data. The real-time monitoring method for the growth characters of the tea trees in intensive cultivation is beneficial to realizing of intensive cultivation and automation in planting of the tea trees.

The invention relates to a live body fluorescent endoscopic spectrum imaging device, comprising a light source unit, a light split unit, a scanning light guide unit, a fiber bundle endoscopic unit, an electrooptical signal detection and acquisition unit and a computer, wherein the light source unit consists of a collimating unit and a band filter. The imaging device is characterized in that the light of the collimating unit passes through the band filter and then enters the light split unit, the light split unit is provided with two paths of interfaces, one path of the interfaces of the light split unit is connected with the scanning light guide unit, the scanning light guide unit is connected with the fiber bundle endoscopic unit, and the other path of the interfaces of the light split unit is connected with the electrooptical signal detection and acquisition unit which is connected with the computer. The imaging device has the characteristics that: 1, a Fourier transform spectrometer is used to detect a sample excitation spectrum, and has the advantages of high spectral resolution (1nm), adjustable spectral resolution and the like; and 2, the fluorescent live body endoscopic spectrum imaging system can provide not only imaging diagnosis at tissue level but also spectrum diagnosis at molecular level.

The invention provides a physiological signal remote monitoring system based on multimodal imaging technique and application thereof; the physiological signal remote monitoring system comprises an integrated imaging module, a hyperspectral imaging module and a control terminal; the hyperspectral imaging module is disposed above the integrated imaging module, and the integrated imaging module and the hyperspectral imaging module are respectively in communication connection with the control terminal. The physiological signal remote monitoring system integrating the 5 imaging modes of hyperspectral mode, visible light mode, near-infrared mode, far-infrared mode and laser bio-speckle mode can provide high-precision extraction and analysis for physiological signals; meanwhile, the physiological signal remote monitoring system allows coordinated data acquisition among multimodal devices and coordinated processing and analysis among data, such that the different application needs such as sleep monitoring and diseased pig screening are met.

The invention discloses a super-resolution fluorescence spectrum imaging microscope. The super-resolution fluorescence spectrum imaging microscope comprises a laser emitter, a dichroic mirror, a spectroscope, an image controller and a spectrograph, the laser emitter stimulates fluorophores of a sample to emit fluorescence, the spectroscope divides the fluorescence into a first beam of light path and a second beam of light path, both the first beam of light path and second beam of light path have fluorescence signals of the fluorescence and spurious signals of exciting light, the first beam of light path is emitted to the image controller to gather the intensity information of the fluorescence, the second beam of light path is emitted to the spectrograph to analyze the spectrum information of the fluorescence and distinguish fluorescence signals from different fluorophores in the fluorescence according to the spectrum information, and the spectrum information gathered by the spectrograph is used for distinguishing the fluorescence signals of the fluorescence and spurious signals of the exciting light so as to distinguish the exciting light from the fluorescence signals through the spectrograph and improve the imaging effect of the super-resolution fluorescence spectrum imaging microscope.

The invention discloses a push broom type spectrum imaging optical system with high resolution and wide visual field. The push broom type spectrum imaging optical system with the high resolution and wide visual field comprises an off-axis three-mirror telescope objective and a spectrometer based on light splitting of prism-grating-prism, the spectrometer based on the light splitting of prism-grating-prism comprises a slit, a collimating lens, a dispersion device, a converging mirror and a plane array detector, and the field diaphragm slit is disposed on a focal plane of the telescope objective. Based on actual needs, a plurality of channels can be designed to share one telescope objective, and when a surface subject enters the telescope objective, a diachronic mirror performs light splitting in the rear, and then each light images through the spectrometer, and thus, different spectral widths can be realized according to needs. Furthermore, the system is compact, lightweight, flexible and practical. The invented high-resolution and wide-field spectrum imaging system is capable of effectively solving the problems of small general field of view, low resolution and low operating efficiency in an existing push-broom imaging system.

The invention provides an optical lens which comprises the following components that are successively arranged from an object side to an imaging surface: a first lens which has negative focal power and an object-side surface that is a convex surface and an image-side surface that is a recessed surface; a second lens which has negative focal power and an object-side surface that is a recessed surface; a third lens which has positive focal power and an object-side surface that is a convex surface; a fourth lens with positive focal power; a fifth lens which has positive focal power and an object-side surface and an image-side surface that are convex surfaces; a sixth lens which has negative focal power and an object-side surface and an image-side surface that are recessed surfaces; wherein the fifth lens and the sixth lens are adhered for obtaining a adhering member; and a seventh lens with positive focal power, wherein the optical lens further comprises a diaphragm between the second lens and the third lens. The optical lens provided by the invention at least has a wide-spectrum imaging function. The invention further provides imaging equipment.