650results about "Spectrum generation" 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.

An apparatus and source arrangement for filtering an electromagnetic radiation can be provided which may include at least one spectral separating arrangement configured to physically separate one or more components of the electromagnetic radiation based on a frequency of the electromagnetic radiation. The apparatus and source arrangement may also have at least one continuously rotating optical arrangement which is configured to receive at least one signal that is associated with the one or more components. Further, the apparatus and source arrangement can include at least one beam selecting arrangement configured to receive the signal.

The present invention relates to the production of instantaneous or non-instantaneous multi-band images, to be transformed into multi- or hyperspectral images, comprising light collecting means (11), an image sensor (12) with at least one two dimensional sensor array (121), and an instantaneous colour separating means (123), positioned before the image sensor array (121) in the optical path (OP) of the arrangement (1), and first uniform spectral filters (13) in the optical path (OP), with the purpose of restricting imaging to certain parts of the electromagnetic spectrum. The present invention specifically teaches that a filter unit (FU) comprising colour or spectral filter mosaics and / or uniform colour or spectral filters mounted on filter wheels (114) or displayed by transmissive displays (115), is either permanently or interchangeably positioned before the colour separating means (123) in the optical path (OP) in, or close to, converged light (B). Each colour or spectral filter mosaic consists of a multitude of homogeneous filtering regions. The transmission curves (TC) of the filtering regions of a colour or spectral filter mosaic can be partly overlapping, in addition to overlap between these transmission curves and those belonging to the filtering regions of the colour separating means (123). The transmission curves (TC) of the colour or spectral filter mosaics and the colour separating means (123) are suitably spread out in the intervals of a spectrum to be studied. The combination of the colour separating means (123) and the spectral or colour or spectral filter mosaics produces different sets of linearly independent transmission curves (TC). The multiple-filter image captured by the image sensor (12) is demosaicked by identifying and segmenting the image regions that are affected by the regions of the multiple filter mosaic, and after an optional interpolation step, a multi-band image is obtained. The resulting multi-band image is transformed into a multi- or hyperspectral image.

A system for determining gas compositions includes a probe, inserted into a source of gaseous material, the probe having a gas permeable sensor tip and being capable of sending and receiving light to and from the gaseous material, a sensor body, connected to the probe, situated outside of the source and a fiber bundle, connected to the sensor body and communicating light to and from the probe. The system also includes a laser source, connected to one portion of the fiber bundle and providing laser light to the fiber bundle and the probe a Raman spectrograph, connected to another portion of the fiber bundle, receiving light from the probe and filtering the received light into specific channels and a data processing unit, receiving and analyzing the received light in the specific channels and outputting concentration of specific gas species in the gaseous material based on the analyzed received light.

The present invention provides an apparatus for photodynamic therapy and fluorescence detection, in which a combined light source is provided to illuminate an object body and a multispectral fluorescence-reflectance image is provided to reproduce various and complex spectral images for an object tissue, thus performing effective photodynamic therapy for various diseases both outside and inside of the body.For this purpose, the present invention provides an apparatus for photodynamic therapy and photodetection, which provides illumination with light of various wavelengths and multispectral images, the apparatus including: an optical imaging system producing an image of an object tissue and transmitting the image to a naked eye or an imaging device; a combined light source including a plurality of coherent and non-coherent light sources and a light guide guiding incident light emitted from the light sources; a multispectral imaging system including at least one image sensor; and a computer system outputting an image of the object tissue to the outside. Thus, the apparatus for photodynamic therapy and photodetection of the present invention can effectively perform the photodynamic therapy and photodetection by means of the combined light source capable of irradiating light having various spectral components to an object tissue and the multispectral imaging system capable of obtaining images from several spectral portions for these various spectral ranges at the same time, thus improving the accuracy of diagnosis and efficiency of the photodynamic therapy.

This invention provides methods for treating a variety of disorders using localized electromagnetic radiation directed at excitable tissues, including nerves, muscles and blood vessels. By controlling the wavelength, the wavelength bandpass, pulse duration, intensity, pulse frequency, and / or variations of those characteristics over time, and by selecting sites of exposure to electromagnetic radiation, improvements in the function of different tissues and organs can be provided. By monitoring physiological variables such as muscle tone and activity, temperature gradients, surface electromyography, blood flow and others, the practitioner can optimize a therapeutic regimen suited for the individual patient.

This invention provides methods for treating a variety of disorders using electromagnetic radiation directed at excitable tissues, including nerves, muscles and blood vessels. By controlling the wavelength, the wavelength bandpass, pulse duration, intensity, pulse frequency, and / or variations of those characteristics over time, and by selecting sites of exposure to electromagnetic radiation, improvements in the function of different tissues and organs can be provided. By monitoring physiological variables such as muscle tone and activity, temperature gradients, surface electromyography, blood flow and others, the practitioner can optimize a therapeutic regimen suited for the individual patient.

The present invention discloses a spectral measurement method via continuous light source and discrete light source, and a measurement instrument for non-invasive detection of human body tissue components. Said instrument includes an incident unit, a probe, a receiving unit and a data processing unit. Said composite spectral measurement method improves or strengthens the output light intensity at the wavelength that carries information of the target component within human body. It enables the spectral detection in the whole wavelength range, and thus significantly enhances the SNR of the detecting system. In the non-invasive detection instrument, light from both the continuous light source and discrete light source can be firstly selectively light-split by AOTF, or AOTF conducts light-splitting for the continuous light source, while the discrete light source LD is controlled by a spatial chopper. When data of the spectral curves achieved from said continuous light source and discrete light source are processed, data acquired under different measuring modes can be compared.

Disclosed are improvements in ellipsometer and the like systems capable of operating in the Vacuum-Ultra-Violet (VUV) to Near Infrared (NIR) wavelength range, and methodology of use.

A measuring device for measuring the height of a workpiece held on a chuck table provided in a processing machine. The measuring device includes a white light source for emitting white light, an acousto-optic deflecting unit for separating the white light emitted from the white light source to produce a flux of diffracted light and for swinging the flux of the diffracted light over a predetermined angular range by applying a voltage, a pinhole mask for passing light having a part of the wavelengths of the diffracted light produced by the acousto-optic deflecting unit, and a chromatic aberration lens for focusing the light passed through the pinhole mask and for applying the focused light to the workpiece held on the chuck table.

The present invention provides a measuring device by which, even if a radiation intensity from a light source, a beam size or a beam intensity distribution of the light source changes, an optical characteristic of an optical element to be measured can be measured very precisely. In a measuring device according to the present invention, to this end, light from a light source is diffracted by a diffracting grating to thereby resolve the same into plural light beams, and by using different light beams, the object to be measured is measured and the intensity of incident light from the light source is measured. With this structure, even if the light from the light source changes, the intensity of the light from the light source is specified concurrently, and therefore, the optical characteristic of the object to be measured can be measured very accurately.

The present invention relates to a device and method for making quantified determinations of the quality of surfaces and wherein the device comprises an optical system with a first optical means and a second optical means as well as a control and evaluation means and an output (display) means. Said first optical means comprises an illuminating means having at least one LED as its light source and serves the function of illuminating the measurement surface at a predetermined angle. Said second optical means is likewise directed at a predetermined angle to the measurement surface and receives the reflected light. A photo sensor of said second optical means emits an electrical measurement signal which is characteristic of said reflected light.The light emitted from the illuminating means is configured such that its spectral characteristic comprises blue, green and red spectral components in the visible light spectrum. A filter means is arranged in the path of radiation between the light source and the photo sensor and which changes the spectral characteristics of the incident light so as to approach a predetermined spectral distribution. The control and evaluation means control the measurement sequence and evaluate the reflected light, deriving therefrom at least one parameter which is characteristic of the surface.

A multi-channeled measuring method for measuring a spectrum of a terahertz pulse includes the steps of a terahertz pulse generating step for generating a terahertz pulse by using an ultrashort pulsed pumping light, a white light generating step for generating a white light pulse by using an ultrashort pulsed probe light, a stretching step for stretching and chirping the white light pulse generated at the white light pulse generating step, an electro-optic modulating step for modulating the chirped white light pulse stretched and chirped at the stretching step in such a manner that the terahertz pulse and the chirped white light pulse irradiate into an electro-optic crystal synchronously, so that the chirped white light pulse is modulated by an electric field signal induced at the electro-optic crystal irradiated by the terahertz pulse, a multi-channeled spectral detecting step for detecting a spectrum of chirped white light pulse modulated at the electro-optic modulating step by a multi-channeled detector, an electric field signal analyzing step for analyzing an electric field of the terahertz pulse irradiated to the electro-optic crystal from the spectrum of the chirped white light pulse detected by the multi-channeled spectrum detecting step, and a Fourier transforming step for transforming the electric field signal analyzed by the electric field signal analyzing step into a frequency spectrum of the terahertz pulse.

Systems and methods for spectral imaging are disclosed. Such spectral imaging can be used to determine properties of a subject material at different locations upon the surface and / or within the material. For example, strain and / or stress within an imaged area of the material can be determined. A system for spectral imaging can include a light source, a two-dimensional sensor array configured to image light from a two-dimensional area of a subject material, a filter configured to filter light from the subject material before the light is imaged and a processor in communication with the two-dimensional sensor array. The processor can be configured to determine a property of the subject material at a plurality of locations within the two-dimensional area of the subject material. Such spectral imaging systems can facilitate the performance of piezospectroscopic measurements of two-dimensional surfaces in a rapid manner while preserving accuracy.

Ultra-miniaturized THz spectrometer / multi-channel receiver devices are provided. THz communication devices employ a THz transmitter, a THz receiver and a modulator, wherein the THz transmitter is configured to introduce a THz signal to the modulator and the THz receiver is configured to receive the THz signal from the modulator and demodulate the signal. Communication systems and methods employing the THz spectrometer / multi-channel receiver devices enable secure communications. Portable THz emitter devices are provided employing semiconductor lasers and a nonlinear birefringent waveguide monolithically integrated on the same substrate.

A system is disclosed capable of automatic and remote identification, tracking, sensing, and characterization of physical entities (objects and subjects) using structural-color tags. Optical encoding is performed in the spectral domain by means of photonic engineering. Several embodiments are provided for the imaging, tagging and processing aspects of the system.

The present invention relates to the production of instantaneous multispectral or hyperspectral images, comprising light collecting means (11), an image sensor (12) with at least one two dimensional sensor array (121), an instantaneous colour separating means, positioned before said image sensor (12) in the optical path of said arrangement (1), and first uniform spectral filters (112) in said optical path, with the purpose of restricting imaging to certain parts of the electromagnetic spectrum. The present invention specifically teaches that at least one first colour mosaic filter (112) is interchangeably positioned before the colour separating means (122) in, or at least close to, converged light (B). The first colour mosaic filter (112) consists of a multitude of homogeneous filtering regions with transmission curves that are partly overlapping on the first colour mosaic (112) or between the first colour mosaic (112) and the colour separating means (122) and suitably spread out in the intervals of a spectrum to be studied. The combination of the colour separating means (122) and the first colour mosaic filter (112) produces different sets of linearly independent colour filter transmission curves.

A spectroscopic sensor that applies lights in a wavelength band containing plural wavelengths to an object and spectroscopically separates reflected lights or transmitted lights from the object using plural light band-pass filters that transmit the respective specific wavelengths and plural photosensor parts to which corresponding transmitted lights are input based on output results of independent photosensors. The spectroscopic sensor may be integrated in a semiconductor device or module by integration using a semiconductor process and downsizing may be realized.

An approach to noninvasively and remotely detect the presence, location, and / or quantity of a target substance in a scene via a spectral imaging system comprising a spectral filter array and image capture array. For a chosen target substance, a spectral filter array is provided that is sensitive to selected wavelengths characterizing the electromagnetic spectrum of the target substance. Elements of the image capture array are optically aligned with elements of the spectral filter array to simultaneously capture spectrally filtered images. These filtered images identify the spectrum of the target substance. Program instructions analyze the acquired images to compute information about the target substance throughout the scene. A color-coded output image may be displayed on a smartphone or computing device to indicate spatial and quantitative information about the detected target substance. The system desirably includes a library of interchangeable spectral filter arrays, each sensitive to one or more target substances.

A scanning tunable detection system and related method for analyzing samples includes a source of time varying excitation signals and a tunable optical filter for selectively transmitting time-varying optical signals emanated from a sample following irradiation with the time varying excitation signals. A detector is provided for converting the time-varying optical signals to electrical detection signals. The system can identify components in a sample using phase sensitive or time sensitive detection. A slew scan mode can be used to permit slow scanning through spectral regions rich in information but quickly in regions without such information.

Optical computing devices are disclosed. One exemplary optical computing device includes an electromagnetic radiation source configured to optically interact with a sample and first and second integrated computational elements arranged in primary and reference channels, respectively, the first and second computational elements are configured to be either positively or negatively correlated to the characteristic of the sample. The first and second integrated computational elements produce first and second modified electromagnetic radiations, and a detector is arranged to receive the first and second modified electromagnetic radiations and generate an output signal corresponding to the characteristic of the sample.

The present invention relates to a system and methods for acquiring two-dimensional Fourier transform (2D FT) spectra. Overlap of a collinear pulse pair and probe induce a molecular response which is collected by spectral dispersion of the signal modulated probe beam. Simultaneous collection of the molecular response, pulse timing and characteristics permit real time phasing and rapid acquisition of spectra. Full spectra are acquired as a function of pulse pair timings and numerically transformed to achieve the full frequency-frequency spectrum. This method demonstrates the ability to acquire information on molecular dynamics, couplings and structure in a simple apparatus. Multi-dimensional methods can be used for diagnostic and analytical measurements in the biological, biomedical, and chemical fields.

Optical characteristic measuring systems and methods such as for determining the color or other optical characteristics of teeth are disclosed. Perimeter receiver fiber optics are spaced apart from a source fiber optic and receive light from the surface of the object / tooth being measured. Light from the perimeter fiber optics pass to a variety of filters. The system utilizes the perimeter receiver fiber optics to determine information regarding the height and angle of the probe with respect to the object / tooth being measured. Under processor control, the optical characteristics measurement may be made at a predetermined height and angle. Various color spectral photometer arrangements are disclosed. Translucency, fluorescence, gloss and / or surface texture data also may be obtained. Audio feedback may be provided to guide operator use of the system. The probe may have a removable or shielded tip for contamination prevention. A method of producing dental prostheses based on measured data also is disclosed. Measured data also may be stored and / or organized as part of a patient data base.

The present invention relates to spectroscopic methods and systems for collecting electromagnetic radiation from an object using a continuously-spinning wavelength-selecting (CSWS) device, e.g., an interference filter(s) or grating. One embodiment of the invention provides a spectroscopic system for collecting electromagnetic radiation from a target. The spectroscopic system has at least one beam of electromagnetic radiation that interacts with the target. The system includes a continuously spinning wavelength-selecting (CSWS) device, e.g., a continuously spinning interference filter / grating driven by a DC motor, in the path of the at least one beam. The device filters the radiation with regard to wavelength to produce filtered radiation. The system further includes at least one detector in the path of the at least one beam for detecting the filtered radiation.

An imaging spectral device for use in the spectrum image analysis for performing the spectroscopic analysis of the respective points in two dimensional field is disclosed. The device comprises an imaging spectral device composing a white-light source to illuminate an object to be measured, a tunable filter located in the optical path between the object and the white-light source, a driving mechanism for wavelength scanning of the tunable filter, and a control unit in which scanning rate of transmitting wavelength of the tunable filter is controlled by the above-mentioned driving mechanism in such a manner that the spectral transmittance of the tunable filter integrated within the exposure time becomes desired spectral distribution of the object to be measured.