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.

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.

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.

A gamma-ray image acquisition device (1) acquires the direction and energy of a target scattered gamma-ray generated by Compton scattering of an incident gamma-ray and acquires the direction and energy of a recoil electron. These pieces of information are used to acquire the incident direction and energy of the incident gamma-ray. The gamma-ray image acquisition device (1) acquires a two-dimensional image by imaging spectroscopy based on the incident directions and energies of a plurality of incident gamma-rays, the two-dimensional image being an image in which each pixel corresponding to each incident direction includes energy distribution information. In the two-dimensional image, the area and the solid angle of an imaging range are proportional to each other. This enables acquiring the distribution of gamma-ray intensities without depending on distance and thereby acquiring an image that indicates more useful information than conventional images.

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.

The invention provides a device and a method of multispectral imaging by diffraction based on a Nipkow disk, belonging to the technical field of imaging spectroscopy. The device comprises a diffraction lens, a chromatography and imaging system consisting of a light shield, the Nipkow disk and a micro-lens array disk, a detector, a relative position fixing mechanism, a first and a second rotation driving mechanisms and a linear actuator, wherein, when the relative position fixing mechanism is unlocked, the first and the second rotation driving mechanisms can drive the light shield, the micro-lens array disk and the Nipkow disk to rotate respectively; when the relative position fixing mechanism is locked up, a first driving mechanism can drive the chromatography and imaging system to scan the focal plane in the direction of an incident image so as to directly acquire the two-dimensional image and the spectral information of the incident ray at a single wavelength; and the linear actuatorcan drive the chromatography and imaging system to scan along the optical axis of the diffraction lens so as to acquire the image and the spectral information of incident rays at all wavelengths within the detected spectral range. The invention has the characteristics of low stray light, high spectral resolution and high spatial resolution.

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.

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.

The invention discloses a photoelectron and ion image energy spectrum device based on liquid beam sample injection. The device comprises a vacuum cavity, a liquid beam sample injection device, a vacuum pump set, a liquid nitrogen cold trap pump and an image energy spectrometer system, and the image energy spectrometer system comprises an imaging electrode, a differential pumping system and an image detector system. The imaging electrode and differential pumping system comprises a repelling polar plate, a leading-out polar plate and a differential polar plate which are sequentially distributedin the vacuum cavity; and the liquid beam sample injection device comprises a nozzle, the nozzle is located between the repelling polar plate and the leading-out polar plate, the vacuum pump set and the liquid nitrogen cold trap pump are arranged on the vacuum cavity, the laser ionization source enters the vacuum cavity, and a laser focus acts on an outlet of the nozzle. Kinetic energy distribution of photoelectrons of a solution phase can be obtained, angle distribution information of the photoelectrons of the solution phase can be obtained at the same time, and the photoelectron or ion imagedetection device of the solution phase considering the solvation effect is a novel photoelectron or ion image detection device of the solution phase in the true sense.

The invention is directed to a method and an arrangement for displaying residual errors of a function which is fitted to a set of points. In the prior art, the residual errors are displayed in a separate graph apart from the function graph so that it is difficult for an observer to discern the quality of the fit of the function to the data points. An improved method and an improved arrangement make it possible to visually assess the quality of the fit in a simple, accurate manner. According to the invention, visual codes are assigned to the fitted function or to the data points of the point set piecewise or pointwise depending on the residual errors, and the fitted function is displayed graphically at an interface, wherein the fitted function is displayed piecewise or pointwise in the form of the assigned visual codes. The invention is preferably used for raster image spectroscopy with laser scanning microscopes.