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5030005 |
Liquid crystal device for calibration and testing of optical instruments
A device and method for optical calibration of an optical instrument that measures optical characteristics along an optical path. A controllable shutter having electrically alterable optical...
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5023449 |
Nuclear spectroscopy signal stabilization and calibration method and apparatus
Nuclear spectroscopy method and apparatus for the stabilization of an energy spectrum, made from a signal, emitted by a radiation detector, and containing nuclear events, represented by pulses,...
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5021664 |
Method and apparatus for correcting the energy resolution of ionizing radiation spectrometers
A method and apparatus for correcting for the ballistic deficit effect that occurs when determining the spectra of radioactive substances with an ionizing radiation detector. Two pulses derived...
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5013920 |
Infrared analyzer with improved calibration
An improved infrared analyzer is provided wherein an unknown specimen gas can be subjected to a measuring infrared ray and a comparative infrared ray to provide resulting signals. The system can be...
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5009231 |
Microprocessor controlled apparatus for the noninvasive determination of peripheral outflow and flow disturbances
A measuring apparatus for the noninvasive determination of peripheral outflow and flow disturbances in the extremities of human beings includes at least one light transmitter for directing light...
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5009099 |
Background correction method for use in gas chromatography
A method of correcting for background changes in a plasma emission detector comprising a photodetector array is disclosed. In the photodetector array a plurality of sensors are used to detect the...
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5008544 |
System for the detection of information in the form of electromagnetic radiation and reading the detected information
It comprises information photodetection means (2), which have N photodetectors (6), each photodetector being able to supply a current having an information-carrying component and a non-information...
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5006714 |
Scintillator dosimetry probe
A probe (10) employs a scintillator (18) as a detector for high-energy beam dosimetry. The scintillator (18) is positioned in an ionizing radiation beam (52) which creates a light output that is...
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5003175 |
Calibration of nondispersive infrared photometer
The photometer is calibrated by using a permanently built-in installation of four, similarly configured chambers in a good heat conducting carrier which is slidably interposed between sample and...
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4996437 |
Optical clutter scene simulator
An optical clutter scene stimulator generates a scene simulating atmospheric optical clutter produced by a nuclear event. The stimulator focuses a display source scene on a focal plane, then...
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4990772 |
Apparatus and method for calibrating a near-infrared interactance probe
A probe for near-infrared interactance quantitative analysis is calibrated by placing the near-infrared source and detector within a cavity of a calibrating sleeve. The cavity provides a...
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4988866 |
Measuring device for checking radiation fields from treatment machines for radiotherapy
A measuring device for checking of radiation fields from treatment machines for radiotherapy, comprising a measuring block (11) containing radiation detectors (1-10) arranged under a cover plate...
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4982327 |
Digital scintillation camera system with correction for analog scintillation camera system characteristics
In a digital scintillation camera system, image data representing an radioisotope distribution is detected by a scintillation camera and is then digitized and converted to a video signal. The video...
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4980904 |
Radiation imaging calibration
An apparatus and method is disclosed for facilitating calibration of a dual energy digital radiography system having a focused multi-element detector assembly. The apparatus includes two sets of...
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4975573 |
Optical test bench
An optical test bench for testing the technical characteristics of electromagnetic wave sensors and emitters of an air and ground surveillance electro-optical module mounted on a missile firing...
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4971439 |
Wavelength calibration method and apparatus
A calibration method and apparatus for economical and rapid calibration of a scientific instrument utilizing a monochromator to generate monochromatic light utilizing controllable means for...
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4970671 |
Bias drift compensation in near infrared quantitative analysis instruments
The invention provides for the elimination of error due to bias shift in near infrared instrumentation having a plurality of near infrared sources. It accomplishes this by comparing subsequent...
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4968137 |
Devices and procedures for in vitro testing of pulse oximetry monitors
A device and method for calibration of pulse oximeters is disclosed. A standard specimen that has optical characteristics of hemoglobin of a known oxygen saturation is placed in the light path of a...
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4969115 |
Method and apparatus for identifying causes of repeatability problems in near infrared analytical instruments
A method and apparatus for determining whether a subsequent sample is substantially identical to an initial sample in a near infrared quantitative analysis instrument. An initial sample is measured...
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4967091 |
Reflective picture generator
Apparatus for testing and/or calibrating a detector comprising a latent image generator, the generator having differing reflectance coefficients across its surface such that in use, when irradiated...
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4965448 |
Internal calibration source for infrared radiation detector
An internal calibration source for an infrared radiation detector has a low emissivity surface with a high emissivity reticle thereon. An image of the detector is focused on the surface so that it...
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4962514 |
Method of calibrating a tomographic system for testing earthen cores
The present invention concerns a method of calibrating a tomographic system which is used for testing earthen cores. At least two phantoms of a first type of phantom is used in calibrating for...
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4948964 |
Artificial target for automatic gain normalization
The disclosure relates to a system for on-line normalization of the outputs of all of the detector elements of an infrared detector wherein, during the retrace period of the scanning mirror,...
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4945233 |
Calibration and quality control system for neutron logging instruments
A calibration and response quality verification system for neutron logging instruments includes a chamber filled with a neutron moderating and absorbing solution and sufficiently sized to provide...
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4944589 |
Method of reducing the susceptibility to interference of a measuring instrument
A method of reducing the susceptibility to interference of the measured value from a measuring instrument. The measuring instrument is of such a type where a test object is subjected to...
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4933555 |
Thermal imager
A thermal imager including a cryogenically cooled detector element array and a scanning element has an optical system with a field of view limited by a field stop (2). A retroreflective region (6)...
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4929831 |
Electron beam apparatus for testing infrared detectors in a cryogenically shielded environment
An apparatus for testing infrared detectors in response to a selectively controlled electron beam within a cryogenically shielded environment includes a cryostat having an aperture which is...
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4928014 |
Near-infrared apparatus and method for determining percent fat in a body
Method and simplified, lower cost apparatus for determining percent fat in a body wherein near-infrared radiation from at least one, and preferably a single pair of IREDs is transmitted into the...
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4925305 |
Method for the preservation of wheat and device useful therefore
A humidity measuring device and standard is disclosed. Humidity is measured by comparing the reflectivity and selected wavelengths of light of a grain sample to the reflectivity of a standard of...
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4918311 |
Set point control circuit for an infrared gas analyzer
An arrangement for ensuring the stability of the set point for a gas analyzer is disclosed. The set point control circuit utilizes an amplifier which is alternately switched between a reference...
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4916645 |
Continuous monochrometer drift compensation of a spectral monochromator
Iterative compensation of drift of peak positions of spectral lines is effected in a spectral monochromator including a grating, a detector of spectral fractions of a spectral band, a stepper motor...
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4914720 |
Gas analyzers
Gas analyzers of the non-dispersive infrared radiation type which are designed to measure the concentration of one gas in a mixture of gases containing that gas. An infrared radiation emitter is...
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4912323 |
Method for creating radon-in-water standards
This invention relates to a method for preparing radium-free standard solutions of radon-222-in-water of known concentration for use in the more accurate calibrating of liquid scintillation...
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4902893 |
Passive infrared radiation scanning system
A radiation scanning system comprises scan mirrors optically coupled together by means of a spherical reflector to relay the scan mirror pupils through the optical path with minimal pupil shift for...
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4900933 |
Excitation and detection apparatus for remote sensor connected by optical fiber
Sensing apparatus for remote sensing of quantities such as blood oxygen concentration using a phosphorescent material located at one end of an optical fiber. The phosphorescent material emits a...
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4891513 |
Photosensor block having an adjustable mounting structure to permit fine positioning of the photosensor block included in the photosensor block
A photosensor block for use with a zero track sensor of a disk drive unit or the like wherein adjustment of the position of a photosensor can be effected simply with accuracy. In the photosensor...
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4888480 |
Optical sensing arrangements with wavelength and time-displacement detection
A two-wavelength referencing optical sensing arrangement comprises two laser sources for producing simultaneous optical pulse signals of two different wavelengths for transmission over a plurality...
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4886965 |
Method for calibrating variable wavelength liquid chromatography detectors
A method for determining the wavelength accuracy of a variable wavelength liquid chromatography detector in the low UV range comprising filling the cell of the detector with a test solution and...
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4885472 |
Silicon grid as a reference and calibration standard in a particle beam lithography system
A reference and calibration grid (44a or 44b) of silicon is incorporated into a particle beam lithography system (10) and used to calibrate the system (10). The grid (44a or 44b) is formed in a...
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4885463 |
Method and apparatus for testing infrared detectors
Two broad blackbody sources (24, 26) having a constantly maintained temperature differential therebetween are alternately directed via a chopper (40) onto a detector array (12) for testing same.
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4882494 |
Apparatus and method for flooding a nuclear imaging device with radiation from an imaging source
The present invention teaches a method for uniformly flooding a nuclear imaging device with radiation from a radiation-emitting calibration source and for correcting for the non-uniformity in count...
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4876453 |
Method and apparatus for calibrating an imaging sensor
An imaging sensor for scanning a thermal image is disclosed. The imaging sensor comprises a first set of elemental detectors operable to receive a thermal image during a first portion of the...
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4870276 |
Process for verifying the energy of an ion beam
Process for adjusting the precise energy of an ion beam, generally less than 2 eV, emitted by an ion source into a reaction chamber, and causing ion/molecule reactions therein. The reaction chamber...
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4866615 |
Scintillation camera compensation for shifting the center channel of the energy spectrum due to photomultiplier gain change
A scintillation camera apparatus includes a scintillation camera which generates X and Y position signals representing a detection position of gamma rays radiated from an object to be examined and...
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4866644 |
Optical instrument calibration system
In a calibration system for optical instruments of the type which make measurements at incrementally spaced wavelengths throughout a spectrum, a plurality of standard samples are measured by a...
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4862004 |
Radiation dose measuring method and apparatus with nuclide discrimination function
A method and portable apparatus for measuring radiation dose and identifying a source radionuclide. Energy correction to calibrate detected charge to γ-ray energy level is made through the use of...
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4851376 |
Cordierite ceramic body having low thermal expansion coefficient, process for producing the same, and method of evaluating cordierite composition
A process for producing a cordierite ceramic body by using a reclaimed cordierite composition for a cordierite ceramic article which has a composition similar to that of the cordierite ceramic...
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4849636 |
Analyzer with compensation
The present invention pertains to an apparatus that is capable of correcting for inaccuracies caused by molecular collision broadening in analyzers. The apparatus includes an analyzer for analyzing...
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4847493 |
Calibration of a mass spectrometer
Apparatus and method are provided for calibrating a mass spectrometer. The calibration hardware includes a relatively small, relatively low pressurized tank for containing calibration gas. The...
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4843238 |
Method for identifying a blistered film in layered films
In a method for identifying blistered film in layered films, a focused ion beam irradiates the approximate center of the blister and a portion which has no blister, and individual sets of the...
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