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4687934 |
Infrared gas analyzer with automatic zero adjustment
Automatic zeroing apparatus zeroes an infrared gas analyzer automatically upon the occurrence of preselected conditions to indicate zero in the absence of absorption of infrared radiation by a gas...
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4683374 |
Method and means for multiplexing optical sensors
Apparatus for optically multiplexing the signals of several optical sensors when those sensors are of the type which utilize a single light input optical fiber for each sensor to send light to the...
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4677294 |
Self-calibrating radiation sensors and control for radiation sensors
Self-calibrating radiation detection apparatus comprising a detector element and calibration apparatus for maintaining a generally constant response of the detector element to a predetermined...
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4675523 |
Directional gamma ray monitor
A directional gamma ray monitor is based on a method for measuring the gamma ray flux within a small solid angle. The method entails measuring the flux incident on a detector 36, measuring the flux...
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4675527 |
Corrosion monitoring probe
A corrosion monitoring probe consisting of a housing for mounting a piece of radioactive material in a surface of a body the corrosion of which is to be measured so that the radioactive material is...
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4673812 |
Calibrating mechanism of an infrared analyzer
An amplifying circuit for amplifying an output from a measurement wavelength detector consists of a preamplifier and a measurement signal amplifier provided at an output of said preamplifier. The...
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4662745 |
Reflectance and luminescence calibration plate having a near-Lambertian surface and method for making the same
In order to provide an calibration plate having both known reflectance and known luminescence characteristics for calibrating and proving a radiometer, which calibration plate exhibits a...
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4661711 |
Fluorometer
Fluorometer in whose reference channel (5) there is optical fiber made of a fluorescent material. The optical fiber acts as an internal standard.
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4660419 |
Reference standard for calibration of ultrasonic arrays
An array of ultrasonic transducer (A) are disposed along a circular arc for examining tubular objects moving therethrough. A calibrating apparatus (B) includes a calibrating cylinder (22) having a...
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4652751 |
Method for calibrating liquid scintillation counters
Method for calibrating a liquid scintillation counter comprising, for a number of reference solutions containing isotopes of known decay rates, the counting of a number of coincident pulses caused...
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4649561 |
Test phantom and method of use of same
A test phantom and method of fabrication and use of the same is disclosed which phantom is representative of human tissue containing variable concentrations of iodine to serve as a test device in...
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4649274 |
Temperature stable boresight module
Laser guided weapons delivery systems are now well known. Such systems, termed laser designator/sighting devices, are optical devices. One of the major potential sources of error in optical devices...
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4647783 |
Measurement of temporal response of electro-optical systems
An improved test system is provided for infrared imaging devices, such as e Army's FLIR (Forward Looking Infra-Red) device. The system employs a moving belt made from one of the complementary...
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4647198 |
Optical reflectance standard for geological exploration
In geological exploration, an improved optical reflectance includes a coating consisting of micropulverized PTFE powder and cement having similar spectral characteristics to the powder. The coating...
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4639603 |
IR image source using speculary reflective transparency
A new technique is provided for the simulation of light images. The technique uses a type of film which is currently marketed under the trade name "Polapan CT", "Polagraph HC" or "Polachrome CS"....
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4638502 |
Anthropomorphic phantoms
Anthropomorphic phantoms for radiological testing, assessment and training are prepared by obtaining a radiograph of a body part to be simulated, translating the radiograph into densitometric data,...
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4636955 |
Method for establishing continuity between contiguous data sets
A method for merging two adjacent gridded map data sets mismatched at their boundaries is disclosed wherein a first data set is assumed to be correct and the second data set is corrected to the...
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4622291 |
Method and device for quantitative end point determination in immunofluorescence using microfluorophotometry
The present invention discloses a device and a process for quantitation of end point in the formation of fluorescent reaction product in microfluorophotometry. The process comprises: (a)...
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4621643 |
Calibrated optical oximeter probe
A probe apparatus for use with an optical oximeter is disclosed. A pair of light emitting diodes emit light of known narrow wavelengths through an appendage of a patient onto a photosensor. A...
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4621265 |
Millimeter wave passive/active simulator array and method of evaluating the tracking capability of an active/passive target seeker
An array of target elements having emissivity and reflectivity properties variable in accordance with a data processing simulation of the electromagnetic signature of a target and target terrain...
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4614870 |
Miniature isotopic soil moisture gage
A miniature, low power consuming, density gage utilizing extremely small artificial and naturally found radioactive sources. The gage employs a unique method of compensating for the gamma...
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4613754 |
Tomographic calibration apparatus
An apparatus for providing data for the calibration of the atomic number and density of a test material being scanned in the radiation field of a computerized axial tomographic scanner (CAT). The...
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4611117 |
Method and arrangement for the automatic stabilization of a scintillation detector
A plastic scintillation detector (14) generates on the basis of ionizing radiation coming from a radiation source (16) light flashes which are converted by a photoelectric transducer (20), for...
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4605232 |
Infrared radiation responsive target
Novel techniques for scattering infrared radiation are employed to form a diffuse retro-reflector suitable as a target for night viewing by an infrared responsive detector.
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4598201 |
Infrared fluid analyzer employing a pneumatic detector
An infrared fluid analyzer with an improved sensitivity and signal to noise ratio is provided. The device includes a capacitor microphone for detecting absorption by the sample of characteristic...
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4595833 |
Multiple internal reflection cell optical system for use in infrared spectrophotometry of liquid and fluidized samples
The present invention provides reflaxicon optics for directing infrared radiation from a source into the cone-shaped entry end of a cylindrically shaped internal reflection element, as well as for...
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4593371 |
X-ray tube emission current controller
Digital values representing trial bias voltages that are to be applied to the control grid of an x-ray tube are stored at respective locations in a battery energized RAM. The addresses of the...
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4590369 |
Method of detecting sensitivities of photomultipliers
In a system provided with a plurality of photomultipliers, the sensitivities of the photomultipliers relative to one another are detected by comparing the outputs of the photomultipliers generated...
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4587623 |
Method for recalibrating nuclear density gauges
A method for recalibrating nuclear density gauges comprises the taking of count rate data from two calibration blocks, preferably magnesium and aluminum, for each source depth position of the gauge...
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4587458 |
Controlling current density
A vacuum furnace for the ionic surface treatment of workpieces in which the workpiece is connected as one of a pair of electrodes of opposite polarity, and in which a third electrode is located...
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4587428 |
Method and apparatus for the diagnosis of tissue samples
A diagnostic technique to histologically detect malignancy and other tissue properties is performed by pressing a solid tissue sample between a pair of planar parallel plates transparent to...
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4585934 |
Self-calibration technique for charge-coupled device imagers
A self-calibration technique which provides detector responsivity normalization for a charge-coupled device, hereinafter referred to as CCD, area imager. The CCD area imager is designed such that...
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4583187 |
Method and circuit for stabilizing conversion gain of radiation detectors of a radiation detection system
A method and a circuit are provided for tuning or calibrating the gain of the radiation detectors of a radiation detection system. For each radiation detector tuning point the energy map status is...
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4582990 |
Analytical instrument with two moving trains of sample holder-carrying trays under microprocessor control
A gamma counter linearly moving two rows of linked trays each having a two-dimensional array of sample tubes. A noncantilevered crane plucks each of the tubes and carries them to the counting well....
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4578578 |
Method for correcting spectrum shift
A method which evaluates at least one subject element includes detecting radiation from a plurality of elements including the subject element. Data pulses are provided which are representative of...
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4571491 |
Method of imaging the atomic number of a sample
A method of obtaining an atomic number image of an unknown material. A plurality of calibration materials which have a plurality of different known atomic numbers and densities are scanned with a...
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4568828 |
Rapid determination of linearity in a dose calibrator
A method of testing dose calibrator linearity comprising the steps of serially interposing a plurality of shields between the sample and detector, each shield having a given thickness to absorb a...
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4567364 |
Method and apparatus for measuring dimension of secondary electron emission object
A dimension measuring apparatus for measuring the dimensions of a secondary electron emission object has a scanning electron microscope main body with a display, and a dimension measuring section...
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4550254 |
Low cost infrared reflectance densitometer signal processor chip
An integrated circuit chip with digital and analog circuits thereon for providing a low cost infrared reflectance densitometer for detecting relative toner density on a photoreceptive surface...
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4549814 |
Test plate having a thermal test pattern
A thermal test pattern comprises motifs of a material having a high thermal emissivity which are provided on one side of a flat substrate. The substrate has a low thermal emissivity. The other side...
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4546252 |
Method for monitoring potassium chloride concentration in drilling fluids
The potassium chloride concentration of a drilling fluid is monitored during well drilling operations to identify any depletion in such concentration with time. Initially, the gamma radiation...
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4546251 |
Device for monitoring X-ray radiation and method of using same
Each of a plurality of thermoluminescent detectors (TLD's) is secured to one of a plurality of slides, which are removably mounted in a like plurality of pockets formed in a generally wallet-sized...
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4544843 |
Radiation detector with built-in test capability
A device having a light emitter coupled to direct light to a portion of a photodetector to provide Built-In Test Equipment (BITE) capability for an optical sensor. A light emitting diode and a...
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4543478 |
Detector pulse forming system for nuclear well logging tools
For use in a nuclear well logging tool, detector pulse simulator circuits in the preferred and illustrated embodiments are set forth. The simulator circuit is adapted to be placed in a sonde for...
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4542299 |
Infrared simulator
An infrared simulator serves to directly transduce electron beams into infrared radiation. To this purpose a modified cathode-ray tube is provided which includes an infrared transmissive window....
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4538071 |
Practical device for the measurement of the absorbed dose versus depth in soft tissues
The present invention relates to a device for measuring the effective dose. In a preferred embodiment, the device includes a detector located in a cavity accommodated in the periphery of an inner...
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4527057 |
Test body arrangement
A test body or phantom for use in checking the performance of apparatus which detects the emission of radiations from a body includes an element of predetermined shape which incorporates a material...
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4524279 |
Radiation source shield and calibrator
A device for shielding a radiation source that is adapted to selectively position the source to be stored and shipped or positioned for repetitively establishing a radiation field for calibrating...
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4517460 |
Method of calibrating a gamma camera, and a gamma camera including a calibration device
A gamma camera is provided with a calibration device which samples the output signal of a photomultiplier tube/amplifier combination. After sampling, the calibration device determines a mean...
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4516025 |
Method and apparatus for controlling scintillation camera
A method for controlling a scintillation camera has a step of, under the control of a CPU, displacing a radiation source displacing device to which is fixed a radiation source and obtaining a...
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