55 results about "Monochromatic radiation" patented technology

This invention provides a process of sterilizing a medical device, and preferably the contents of a sealed container which comprises said medical device, comprising the step of exposing said medical device to monochromatic ultraviolet radiation whereby the Dvalue of Bacillus stearothermophilus (ATCC 7953) is at least 23.7 mJ / cm2 monochromatic ultraviolet radiation at 257 nm to the spore. Further, this invention provides a process of sterilizing a medical device comprising the step of subjecting said medical device to monochromatic ultraviolet radiation wherein the minimum total energy density of said monochromatic ultraviolet radiation at 257 nm which reaches the microorganisms present on said medical device is at least 284 mJ / cm2. This invention further provides an apparatus for delivering UV radiation to a medical device for sterilization comprising a laser and a scanner for the laser such that at least 284 mJ / cm2 at 257 nm is applied to a treatment area for said medical device. This invention provides a process and apparatus in which sterilization can be achieved in less than 20 seconds, preferably less than 15 seconds, more preferably in less than 5 seconds. The process and apparatus are efficient and continuous.

An extremely small (1-250 micron FWHM) beam of slow highly charged ions deexciting on an x-ray production target generates x-ray monochromatic radiation that is passed through a specimen and detected for imaging. The resolution of the x-ray radiograms is improved and such detection is achieved with relatively low dosages of radiation passing through the specimen. An apparatus containing an electron beam ion trap (and modifications thereof) equipped with a focusing column serves as a source of ions that generate radiation projected onto an image detector. Electronic and other detectors are able to detect an increased amount of radiation per pixel than achieved by previous methods and apparati.

An optical filtering device incorporates first and second prisms, the latter prism counteracting the angular dispersion of the former prism. A spatial light modulator provides a positionally variable optical stop located to block radiation within a wavelength interval and received from a location within a scene. Unobscured radiation from that and other scene locations passes to a camera, which produces an image on a display. Opaque pixels in the stop are positioned to block unwanted light sources. The invention attenuates potentially dazzling monochromatic radiation while retaining radiation at other wavelengths for imaging purposes.

In one embodiment of the spectroscopy method, the method comprises the steps of modulating the wavelength of a monochromatic radiation at a modulation amplitude and a modulation frequency; determining a first variable representative of an absorbance of an analyte in a sample; and demodulating by phase-sensitive detection the first variable at a harmonic of the modulation frequency to produce a harmonic spectrum of the analyte. In one embodiment of the spectroscopy apparatus, the apparatus comprises a laser diode integrated with a first photodetector configured to detect an intensity of a backward emission from the laser diode and act as a reference detector; a second photodetector configured to detect an intensity of laser radiation exiting a sample; and electronic circuitry coupled to the laser diode and the photodetectors, configured to acquire and process spectra of the sample. In another embodiment, the spectroscopy apparatus comprises a beam splitter configured to split the laser radiation into a first radiation portion and a second radiation portion and a first photodetector configured to detect the intensity of the first radiation portion.

The present invention provides a new approach for processing hyper-spectral radiance data. It uses a transformation matrix to convert an instrument radiance spectrum into a pseudo-monochromatic radiance spectrum. The pseudo-monochromatic radiance spectrum is produced by an empirical transform of the instrument channel spectrum to a monochromatic equivalent spectrum (i.e., a pseudo-monochromatic spectrum). Eigenvector regression is used to produce the empirical transformation. Although the transformation does not produce the monochromatic radiance spectrum without error, the transformation error is generally well below nominal instrument noise levels for most spectral channels. The reduction in instrument noise results from a noise filtering effect of the eigenvector transformation. One of the advantages of the present invention is that it eliminates the need to build different fast radiative transfer models (RTMs) for different observing instruments, since the retrieval of geophysical parameters is based on an inversion of the monochromatic radiative transfer model. Although a different transformation matrix is required for different instrument spectral channel characteristics, the production of this transformation matrix is straightforward and simpler than the production of an accurate channel radiance fast model.

A spectroscopic method and system to identify a biofilm of a microorganism. A sample containing a sample microorganism is irradiated with substantially monochromatic radiation. A Raman data set is obtained based on radiation scattered from the irradiated sample. A database is searched in accordance with the Raman data set in order to identify a known Raman data set from the database. The database contains a plurality of known Raman data sets where each known Raman data set is associated with a known sessile form of a corresponding known microorganism. A sessile form of the sample microorganism is identified based on the known Raman data set identified by the searching.

An infrared three-dimensional imaging system and method in which an object is irradiated by monochromatic radiation in the near-infrared or mid-infrared region of the spectrum. A spectral image is captured for each wavelength in a spectral range by a radiation detector to create a spectral image data block that is stored on a data storage device. The object is rotated by some predetermined angular increment until a complete three hundred and sixty degree view is obtained so that a spectral image data block is created for each angular position. Each spectral image data block is compressed to its most relevant spectral information and used to re-create a three dimensional image by a known computerized tomography algorithm.

The invention discloses a method for measuring the temperature of a rotary cement kiln and a method and device for online detection of the temperature field of the rotary cement kiln. The method for measuring the temperature of the rotary cement kiln comprises the steps that an offline calibration portion establishes a mapping relational table of gas phase each-component gas-solid absorption coefficient correction coefficients and the temperature by considering gas-solid two-phase radiation characteristics inside the rotary cement kiln; an online detection portion selects one set of gas-solid absorption coefficient correction coefficients from the mapping relational table obtained by the offline calibration portion by testing monochrome radiation intensity and gas phase component molar volume quotients, so that the calculated theoretical monochrome radiation intensity and the detected actual monochrome radiation intensity are closest, and the corresponding temperature is the temperature to be measured. The invention further discloses the method and device for online detection of the temperature field of the rotary cement kiln by applying the method for measuring the temperature. According to the method for measuring the temperature of the rotary cement kiln and the method and device for online detection of the temperature field of the rotary cement kiln, the measuring result is accurate, the temperature field inside the rotary cement kiln can be globally analyzed, excessive temperature of materials of a burning zone and deteriorating combustion conditions are avoided, and heating-power-type NOx emission caused by the excessively-high temperature is reduced.

Embodiments of the present invention are directed to a nuller that is used to significantly reduce or eliminate a monochromatic radiation signal within a polychromatic object field. In one embodiment, a method of nulling a coherent light from a light beam having the coherent light and an incoherent light comprises collimating the light beam having the coherent light and the incoherent light, and destructively interfering the coherent light to null the coherent light with no destructive interference of the incoherent light so as to project the incoherent light without the coherent light.

The invention discloses a RAW image radiation temperature measuring method. The method comprises the following steps: a CCD camera outputting image data in a RAW format, and storing the data as a true color RGB image after linearity interpolation; arranging the exposure time of the CCD camera through RAW image gray scale signals obtained from the image data in the RAW format; and extracting a spectral color value of each channel from the true color RGB image; obtaining image detection data from ratios of the spectral color values to the exposure time; taking a conversion proportion coefficient, calibrated through a black-body furnace, between the image detection data and incident radiation intensity, as a calibration constant; through the CCD camera, continuously acquiring radiation images, and extracting spectral color signals and exposure time signals of any two channels in pixels R, G or B; and performing correction through the calibration constant to form correspondingly extracted monochromatic radiation intensity signals under the condition of two primary wavelengths, and according to a colorimetric temperature measurement principle, obtaining an image temperature and a radiation ratio. The temperature measuring apparatus provided by the invention comprises the CCD camera, a stiff rod endoscope, a network switch and a background server.

An ion implanted semiconductor surface is illuminated with a flood illumination of monochromatic radiation, and an image of the surface is taken using light which has been Raman scattered. The illumination and imaging system are calibrated by flood illuminating a uniformly Raman scattering surface.

The invention discloses a method for measuring temperature distribution of inner walls of a sealed cavity metalware. The method includes the following steps that (1) an infrared charge coupled device (CCD) camera and a spectrograph are calibrated through a blackbody furnace to establish a corresponding relation between a spectral signal and a radiation intensity signal; (2) radiation spectral signals of a metal surface in different wave lengths are received by the spectrograph, and reference point temperature and radiancy can be calculated according to calibration data; (3) infrared radiation images of the metal surface are filmed by the infrared CCD camera, and according to a monochromatic radiation intensity ratio between each pixel point and a reference point, the temperature distribution images of the metal surface are obtained by calculation, and the actual temperature distribution of the metal surface can be obtained. Radiation energy information of a radiation source in multiple bands can be obtained through the spectrograph, changing curves of the temperature and the radiancy of the radiation source with the change of wave lengths can be obtained by calculation, multi-point radiation energy information of surfaces of the radiation source can be captured by the infrared CCD camera, a measurement point of the spectrograph is used as the reference point, and thereby, accurate measurement of temperature distribution of the surfaces of the radiation source can be achieved.

Measurement device for chemical agents quantity contained in a gas medium having a source of monochromatic radiation with a wavelength which changes in accordance with time law that is supplied through an optical brancher to an optical modulator, and then into a gas medium to be measured and further into a photoreceiver, whose signal is supplied into a computing block, while another part of the radiation from the optical brancher is supplied into a gas correlating filter, and the radiation which passed through the gas correlating filter is supplied to the auxiliary photoreceivers, whose signal is supplied to the solving block of standard comparison for controlling the optical modulator and the computing block, so that on the photoreceiver, a radiation is supplied only from spectral lines or bands of radiation of the chemical agents to be measured, and signals from a part of spectral radiation in spectral lines and bands which coincide with a spectral lines of bands of absorption of foreign gasses are filtered out.

The invention discloses a diagnostic method of an atmospheric pressure inductively coupled plasma temperature field, and belongs to the field of plasma diagnosis science and technology. The method includes the steps of: acquiring radiation intensity of local points in plasma and a monochromatic grayscale image of a plurality of rotating spectral lines in the whole plasma radiation light, and acquiring a quantitative relational expression between gray values and radiation intensity by utilizing a one-to-one mapping relation between the radiation intensity of the local points and the gray values in the monochromatic grayscale image, further acquiring monochromatic radiation images of a plurality of rotation spectral lines in the plasma radiation light, acquiring molecular rotation temperature, namely gas temperature, of a point by using a Boltzmann slope method for a plurality of monochromatic radiation images of each point, and finally acquiring gas temperature field distribution of the plasma for other points accordingly. According to the method, the problem that the atmospheric pressure inductively coupled plasma temperature field distribution cannot be obtained by the current plasma diagnosis means is solved.

The invention discloses a terahertz generator based on a two-dimensional material phonon mode. The terahertz generator comprises a low-energy broadband terahertz pulse generation device, a terahertz monochromatic radiation generator and a temperature control device used for controlling the temperature of the terahertz monochromatic radiation generator. The terahertz monochromatic radiation generator comprises a two-dimensional material layer and a high-transmission substrate, the two-dimensional material layer is loaded on the high-transmission substrate, broadband terahertz pulses emitted by the low-energy broadband terahertz pulse generation device sequentially pass through the two-dimensional material layer and the high-transmission substrate to output monochromatic terahertz radiation, and the efficient monochromatic terahertz radiation is achieved at the emitting end through the two-dimensional material layer of the terahertz generator.

A system for generating polychromatic light, which includes: an optical pumping device suitable for continuously or quasi-continuously emitting a monochromatic or quasi-monochromatic radiation according to a pumping wavelength; a device for guiding light arranged such as to emit polychromatic radiation continuously or quasi continuously, at the output thereof, and a device for coupling between the pumping and coupling device. In the system, the guiding device, includes a microstructured optical fiber in which the core is at least partially doped with a material having a high intrinsic non-linear response, and the geometry of the optical fiber and the doping rate of the core thereof are predetermined such as to adapt the zero dispersion length of the optical fiber to the pumping wavelength.

A single particle caloric absorption spectrometer for directly measuring the absorption spectra in situ of individual aerosol type particles comprises a differential arrangement of two identical electrodynamic traps (separated by a series of pneumatic valves) capable of suspending a charged particle in free-space in a non-intrusive manner in one of the traps; a source of monochromatic radiation, e.g., a laser, which is split and directed equally through transmission windows into the traps; and, a high precision capacitance manometer capable of detecting the pressure differential between the traps. After a particle has been trapped in one of the traps and the traps have been sealed from the atmosphere and from each other by the pneumatic vales, the radiation source is turned on and is evenly split / directed into both trap volumes via an appropriate beam splitter and transmission windows. This results in identical illumination of both the target and reference trap regions. A certain fraction of energy will be absorbed by the particle resulting in its heating. The heat generated within the particle is rapidly transferred to the surrounding air resulting in a net change in pressure between the target and reference traps. This change in pressure is recorded by the capacitance manometer and is shown to be proportional to the actual absorption cross section of the particle. The wavelength of the laser is then shifted slightly and the measurement is repeated until the desired spectra are completely recorded.

The invention provides a spectrometer-component-based non-contact engine exhaust flame monitoring device. The device can monitor the health state of an engine under the condition that the normal work of the engine is not affected. The working principle of the device is that: a pre-optical system acquires the complex radiation in exhaust flame of the engine, the complex radiation is transmitted into a spectrometer component through an optical fiber and is decomposed into monochromatic radiation through a grating in the spectrometer component, and an analog signal is converted into a digital signal by using a charge coupled device (CCD) detector; data processed by using the spectrometer component pass through a high-speed universal serial bus 2 (USB2), are transferred into a network module, are output through a network cable port, and are transmitted into a computer through a router; and the computer receives the spectral data and can judge the wear condition of the engine by comparing spectra and theoretical spectra of target elements to judge the existence of metals in the exhaust flame of the engine.

A stabilized LiDAR system and a method for stabilization. The LiDAR system includes a laser, the laser being designed for emission of monochromatic LiDAR radiation within a wavelength working range; a thermocouple element configured to set the working temperature of the laser; a means for evaluation, designed to determine, from the radiation emitted by the laser, a measure for the deviation from an actual wavelength of the radiation to a setpoint wavelength within the wavelength working range of the laser; and a means for regulation, designed to control the thermocouple element on the basis of the measure of deviation determined by the means for evaluation, in such a way that the working temperature of the laser is set to a value, at which the emitted monochromatic LiDAR radiation corresponds to the setpoint radiation.

The present invention discloses a method for measuring an actual temperature of a flame by using all information of a radiation spectrum and a measurement system thereof. The method includes: conducting more theoretical data processing by using energy level structure correction, wherein all information of the radiation spectrum can be used; and by way of a keyboard input manner or a data transmission input manner, acquiring an energy level structure correction parameter, and finally acquiring a more accurate actual temperature value of a measured flame. The method effectively overcomes a defect that the true temperature of the flame can be obtained by only conducting radiance correction through data processing with great calculations when adpted multi-spectral temperature measurement method. In the existing multi-spectral temperature measurement method at present, only information of several monochromatic radiation capacities in the radiation spectrum can be used; and in the method, information of all the monochromatic radiation capacities, thousands of monochromatic radiation capacities in general, in the radiation spectrum can be used.

A device to be positioned between a heat source and a heat sink may transform infrared electromagnetic (IR-EM) energy exchanged therebetween from a first form to a second form. The device may include a pair of layers facing each other and having dielectric material with molecular excitability characteristics to produce the second form of IR-EM energy. The pair of layers may define a gap therebetween. The device may include a conversion circuit configured to convert the second form of IR-EM energy into electrical energy.

The invention belongs to the field of optical metrology testing, and discloses a blackbody cavity absorption coefficient calibration method under a variable temperature condition, which comprises the following steps of: generating uniform monochromatic radiation by using a high-stability radiation source in combination with a stable power instrument, receiving the monochromatic radiation by a blackbody cavity to be tested, and measuring the absorption coefficient of the blackbody cavity by adding an inverted photoelectric detector in front of a Brewster window. And the reflected light beam intensity is calibrated, so that the full-temperature-section calibration of the blackbody cavity absorption coefficient is realized. According to the method, aiming at the verification problem of blackbody cavity absorption coefficient drift caused by current temperature fluctuation, a variable-temperature cavity-detector integrated test means is innovatively introduced, the measurement of the full-band absorption coefficient of the cavity in a variable-temperature environment is realized, and the method has the characteristics of small size, high calibration accuracy and wide application prospect.