59 results about "Imaging spectroscopy" patented technology

A portable fluorescence and transmittance imaging spectroscopy system for use in diagnosing plant health. The system has a primary LED light source array with spectral wavelengths in the 400-600 nm range, a focus cone that collects the LED light source output and focuses it, a controller that controls the primary LED array to turn it on and off, or certain of the spectral wavelengths on and off such that the primary LED array controllably emits light of a desired wavelength in the range, the light irradiating the plant through the focus cone, a digital imaging device that both spatially and temporally captures a fluorescence image comprising chlorophyll fluorescence emitted by the plant due to the emitted light from the LED array, a leaf holder located proximate to the output of the focus cone to maintain a consistent position and distance between the digital imaging device, the LED light source and the leaf and providing for fixed position and non-destructive leaf imaging and testing, a secondary light source for providing broad-band transmissive light through the leaf, a lens for focusing onto the imaging device the light emitted from the secondary light source, and one or more memory devices that store the fluorescence image and the transmitted light data received by the digital imaging device and store a library of plant fluorescence-intensity data indicative of both healthy plants and stressed or diseased plants, and plant light transmittance data indicative of certain plant conditions.

Systems and techniques for imaging spectroscopy using improved data acquisition for infrared and near-infrared imaging. A first filter corresponding to a first wavelength may be positioned in the optical path of an infrared camera, and subframe data may be acquired for different exposures. A second filter corresponding to a second different wavelength may be positioned in the optical path of the infrared camera, and subframe data acquired for different exposures. Image data for the first wavelength and the second wavelength may then be compared to reference spectroscopic data.

Generating a multispectral or hyperspectral image of an image source with an optical system having an adjustable, wavenumber-dependent point spread function, by collecting panchromatic images of the image source, each of which corresponds to a selected point spread function and includes a measured intensity data set corresponding to a range of wavelengths, transforming the panchromatic images into the spatial frequency domain by using a Fourier transform, solving a matrix equation at each spatial frequency, in which a vector of the transformed panchromatic images is equal to the product of a predetermined matrix of discrete weighting coefficients and a vector representing a wavenumber content of the image source at each spatial frequency, resulting in a determined wavenumber content of the image source in the spatial frequency domain, and inverse transforming the determined wavenumber content of the image source from the spatial frequency domain into the image domain, resulting in the multispectral or hyperspectral image.

A method for measuring spatial and spectral information from a sample using computed tomography imaging spectroscopy. An area of the sample is illuminated using an illumination source having substantially monochromatic light. Raman scattered light is directed from said illuminated area of said sample onto a two dimensional grating disperser. Light output, from the two dimensional grating disperser, is directed onto a detector that detects a dispersed image. The dispersed image from the detector is applied to a processing algorithm that generates a plurality of spatially accurate, wavelength resolved images of the sample.

A method for obtaining spectral imaging data comprises at least the steps of receiving a sample set of data generated by sampling a spectral property of an image of an object in a spatial basis, wherein the sampling of the spectral property of the image of the object comprises providing a Spectral Filter Array (SFA) by arranging a plurality of SFA elements together to form a surface; configuring each SFA element of the plurality of SFA elements to filter one or more spectral bandwidths centered each at specific wavelengths corresponding to that SFA element, whereby all of the plurality of SFA elements taken together cover a determined spectral range; and setting the specific wavelengths of each SFA element of the plurality of SFA elements on the surface such to obtain a uniform and aperiodic spatial distribution of all of the plurality of SFA elements across the surface. The sampling of the spectral property of the image of the object further comprises providing an image sensor configured to record at each pixel the light filtered by one of the plurality of SFA elements or a subset of the plurality of SFA elements thereby producing one intensity value of light filtered by the one of the plurality of elements or the subset of the plurality of SFA elements per pixel; forming the image of the object on the SFA through a lens or group of lenses; and recording for all of the pixels of the image sensor the spectrally filtered intensity values thereby obtaining a 2-dimensional array of the intensity values corresponding to the image of the object. The method for obtaining spectral imaging data further comprises the step of reconstructing a full 3 dimensional spectral data cube of the imaged object from the sampled 2-dimensional array.

The invention discloses a quasi real-time space time mixed modulation infrared interference spectrum imaging system, method and application. According to the system, an infrared thermal radiation signal reaches a scanning mirror 3 through an infrared optical window 1, a time modulation signal is generated, the time modulation signal goes through a space modulation interference tool 4, time and space mixed modulation imaging interferometry are generated at the same time, optical lights are gathered and collected through a Fourier lens 15, the optical signals enter into a detector assembly 6 and then an electrical signal is outputted, the electrical signal goes through a high-speed image processing circuit 7 and an infrared image sequence is imaged, the sequence is inputted to a CUDA architecture parallel computer 9 through a digital image data interface 8, an interference data cube is formed, the interference data cube goes through a data cube and is converted through a parallel fast Fourier transform algorithm 10, and information is displayed on an image display 14 after processing. The imaging system has no slit, the luminous flux is large, and the automatic interference signal acquisition and quasi real-time imaging spectroscopy gas detection can be realized.

The invention discloses an interference imaging spectroscopy device and an interference imaging spectroscopy method for improving spectral resolution. The device comprises a front optical system, a dispersion flat plate Sagnac lateral shear beam splitting system, an imaging system and a signal processing system which are arranged along an optical path in sequence, wherein incident light of each point of a target enters the front optical system to eliminate stray light and form a collimated light beam; the light beam then enters the dispersion flat plate Sagnac lateral shear beam splitting system; the light is laterally sheared by the lateral shear beam splitting system; because of the flat plate dispersion effect, the shear distance changes along with light wavelength, and further optical path difference information which changes along with wave number is introduced; two beams of light formed by shearing subsequently enter the imaging system; interference information under different optical path differences of each point of the target is acquired by turning the lateral shear beam splitter or the entire system; and discrete fourier transform is performed on the acquired interference information of the target point to obtain high-resolution spectral information and two-dimensional image information of each spectral band are obtained. The device and the method have the advantages of high spectral resolution, high luminous flux, high target resolution and the like.

The invention relates to the field of spectral imaging technology, and is a fast and non-destructive prediction device for the validity period of fresh pork based on multi-spectral imaging. The problem of damage. The invention collects the diffusion spectrum image of the predicted meat product, extracts information from the collected image, and predicts the validity period of the meat product according to the validity period prediction model established based on the corresponding physical and chemical characteristics of the predicted meat product. The invention can predict the expiration date of more than one meat product every second, the accuracy is greater than 90%, and the meat product has no damage.

A method of imaging an optically thin sample is described wherein a collimated beam is directed through the sample and then reflected back through the sample one or more times. The beam is then directed toward a detector which collects and analyzes the spatial and spectral composition of the beam. In some embodiments, the detector is a focal plane array with a large number of detector elements. In other embodiments the relative position of a single detector or a small detector array and the sample is altered and the process is repeated, thereby tracing out a large virtual detector array. In either case, the spectral information received by the detector elements can be related, by methods which are elaborated below, to information about the spatial distribution of absorption in the sample.

The invention relates to an imaging spectrograph based on laminated glass mapping. The imaging spectrograph comprises a relay lens system, an image mapper, a collecting lens, a dispersing unit, a micro-lens array and an imaging sensor. The image mapper is formed by lamination of ultra-thin glass; the end surface of the ultra-thin glass has M*N two-dimensional inclination angles; processing is carried out by steps like lamination and polishing; and the end surfaces of the inclination angles are plated with reflective films. An optical image is imaged on the surface of the image mapper by the relay lens system; the image mapper segments the image and reflects the segmented images; reflected images are emitted in parallel from the collecting lens and are dispersed by the dispersing unit; andthen dispersed light is imaged on the imaging sensor by the micro-lens array to obtain spatial information and spectral information of the images. With the provided imaging spectrograph based on laminated glass mapping, problems of difficult processing and research and high cost of the image mapping type imaging spectroscopy technology are solved.

An imaging scanner and a method for using the same are disclosed. The scanner includes a variable attenuator adapted to receive a light beam generated by a MIR laser and that generates an attenuated light beam therefrom characterized by an attenuation level. The scanner includes an optical assembly that focuses the attenuated light beam to a point on a specimen. A light detector measures an intensity of light leaving the point on the specimen, the light detector being characterized by a detector dynamic range. A controller forms a plurality of MIR images from the intensity as a function of position on the specimen, each of the plurality of MIR images being formed with a different level of attenuation of the light beam. The controller combines the plurality of MIR images to generate a combined MIR image having a dynamic range greater than the detector dynamic range.

The invention discloses an imaging spectroscopy endoscope system. The system adopts cooperation of a broadband light source and a filter to realize output of the tunable monochromatic light, and usesa camera to obtain a sequence of monochrome illumination images of an endoscope, since a gray value of a pixel is an intensity value of the wavelength corresponding to a spectral curve, a spectral image cube in the field of a view region can be constructed by the monochrome image sequence, the color image is synthesized according to the monochrome image sequence by an image fusion algorithm, the endoscope realizes the function of the imaging spectrum, and the pathology is analyzed by the combination of the characteristics of the image and the spectrum, so that accurate diagnosis and treatmentcan be realized.

A system and method for spatial imaging and imaging spectroscopy system includes a sample holder for holding samples, an illumination system arranged to illuminate the samples, a wavelength isolation module configured to selectively isolate received illumination from the samples to a plurality wavelengths, a single matrix imaging device arranged to receive the isolated wavelengths from the wavelength isolation module through a single lens system, and a computing device configured to perform a spatial imaging and imaging spectroscopy process. The spatial imaging and imaging spectroscopy process includes acquiring image data corresponding to each of the isolated wavelengths, performing spatial imaging analysis based on the acquired image data, and performing imaging spectroscopy on the acquired image data.

High-performance optical-metasurface-based components configured to at frequencies of UV light and, in particular, in deep UV range and performing multiple optical-wavefront-shaping functions (among which there are high-numerical-aperture lensing, accelerating beam generation, and hologram projection). As a representative material for such components, hafnium oxide demands creation and establishment of a novel process of manufacture that is nevertheless based on general principles of Damascene lithography, to be compatible with existing technology and yet sufficient for producing high-aspect-ratio features that currently-used materials and processes simply do not deliver. The described invention opens a way towards low-form-factor, multifunctional ultraviolet nanophotonic platforms based on flat optical components and enabling diverse applications including lithography, imaging, spectroscopy, and quantum information processing.

A system for computational imaging spectroscopy to provide compact and lightweight design, as well as large field of view of an object to be captured. The system includes imaging components, and computational device. The imaging components includes lens assembly, a fixed or variable-diameter aperture, spectral filter array and imaging sensor. The lens assembly provides wide angle of view, image-side telecentricity, and further may correct for longitudinal chromatic aberrations. The lens assembly may not provide correction of lateral chromatic aberrations. Furthermore, the lens assembly provides image-space telecentricity so as to chief rays are incident perpendicular to image sensor. The lens assembly may produce different chromatic aberrations pattern for each wavelength within the spectral range of interest. The pass-band nanofilter array is configured to filter a plurality of specific bands of light reflected from the imaged object and further produces a plurality of spatio-spectral samples of the imaged object projected onto the photosensitive pixels of imaging sensor. The computational device reconstructs complete spectral cube within the spectral range of interest, and further enables the computation of object reflectance at each pixel of the captured image from the plurality of spatio-spectral samples registered by the imaging sensor.

Disclosed is a process and device that enables ultra-high resolution one- and two-dimensional spatial imaging of Rayleigh, Raman and Thomson spectral features without the need for a spectrometer. The disclosed approach provides the capability for imaging of a single spectral feature such as a single rotational Raman line and the simultaneous elimination of background scattering, or for separating the rotational Raman image from the Rayleigh scattering. High collection efficiency provides the opportunity for single pulse time frozen images to be acquired.