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4836673 |
Wavelength accuracy test solution and method
A packaged test solution for determining the wavelength accuracy of variable wavelength liquid chromatography spectrophotometric detectors at one or more reference wavelengths consisting of 254.6,...
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4834532 |
Devices and procedures for in vitro calibration of pulse oximetry monitors
A device and method for calibration of pulse oximeters is disclosed. A standard specimen that has optical charactertistics of hemoglobin of a known oxygen saturation is placed in the light path of...
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4818868 |
Trochoidal analysis of scattered electrons in a merged electron-ion beam geometry
The method and apparatus of this invention provides a plurality of measurements indicative of the absolute cross section for excitation of an ion beam. The ion beam is merged for excitation by...
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4818873 |
Apparatus for automatically controlling the magnification factor of a scanning electron microscope
The present invention relates to an apparatus for calibrating the magnification of a scanning electron microscope. The microscope includes a generator for generating an electron beam, a scanning...
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4812050 |
Method for calibrating a heat flux gauge
Double-sided, high-frequency response heat flux gauge for use on metal tune blading consists of a metal film (1500A) resistance thermometer sputtered on both sides of a thin (25 μm) polyimide...
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4812646 |
Optical fiber initialization method and apparatus
A noncoherent fiber optic bundle is made coherent by relating the positions of fiber ends in the exit field to the consecutive positions of an initialization beam of light moving in the entrance...
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4810891 |
Method for the automatic identification of the type of measuring head of a fiber optic measurement value acquisition and transmission device
A system for the automatic identification of the type of measuring head (1) of a fiber optic measurement value acquisition and transmission device which exhibits a measurement signal fiber (3) and...
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4810873 |
Method and device for automatic compensation of the attenuation of a fiber optical measurement value transmission
Measurement value signals (S1), for example from a signal transmitter which is located at high-voltage potential, which are transmitted by a signal transmitter (1) with a transmit diode (6) on the...
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4807632 |
Measuring instrument for intracardial acquisition of the blood oxygen saturation of a patient for controlling the pacing rate of a heart pacemaker
A measuring instrument for the intracardial acquistion of the blood oxygen saturation of a patient for use in controlling a heart pacemaker implanted in the patient has a measuring probe with a...
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4808818 |
Method of operating a mass spectrometer and a mass spectrometer for carrying out the method
A method is described for operating a mass spectrometer with a location-resolving detector. In this case, when an ion impinges on the detector, the instantaneous parameters of the analyzer are read...
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4801804 |
Method and apparatus for near infrared reflectance measurement of non-homogeneous materials
A method and apparatus for near infrared reflectance measurement of non-homogeneous materials. Constituents of a material are quantitatively analyzed by reflectance techniques utilizing a planar...
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4797546 |
Method for reading a light-sensitive element constituted by a photodiode and a capacitor
A method for reading a photosensitive element having a photodiode and a capacitor as applicable in particular to reading a low-level analog signals consists in introducing a biasing charge...
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4797560 |
Matrix of photosensitive elements and an associated reading method in image formation
The invention provides a matrix of photosensitive elements in which each photosensitive element is reduced to the association of a diode and a capacity. The method for manufacture thereof is...
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4796633 |
Method and apparatus for in vitro calibration of oxygen saturation monitor
A calibration reference apparatus comprising an elongated peripheral tubular wall open at one end and an end wall closing the other end of the tubular wall. The tubular wall and the end wall are...
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4794266 |
Method and apparatus for light transmission measurement by sending light, measuring received light and computing transmittance
Measurement equipment based on the measurement of light transmission are plagued by changing characteristics of protective glass surfaces due to contamination or other factors. In a method, light...
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4791656 |
One-block calibration method for density gauges
Nuclear density gauges of the type having a gamma source which is positionable at several different source depth positions with respect to a detector are calibrated in an efficient and advantageous...
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4789930 |
Energy dependent gain correction for radiation detection
A method and apparatus for calibrating the detector gain of a dual energy digital radiography system is provided. A basis material calibration object is scanned to create low and high energy pixel...
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4788706 |
Method of measurement of x-ray energy
X-ray energy in an x-ray beam is determined from a comparison of apparent absorption of energy by three different materials. Initially, the attenuation coefficients of each of the materials as a...
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4782502 |
Flexible calibration phantom for computer tomography system
In a computer tomography system, a flexible calibration phantom is utilized simultaneously with analysis of a patient to ensure accuracy of imagry and to facilitate interpretation of tomographs...
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4779216 |
System for calibrating a monochromator
A method for calibrating a monochromator to compensate for mechanical imperfections in its diffraction grating and grating drive assembly employs a two stage interactive procedure which permits the...
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4777133 |
Device for quantitative endpoint determination in immunofluorescence using microfluorophotometry
The present invention discloses a device and a process for quantitation of Toxoplasma gondii and Treponema pallidum antibody titer in a biological sample by immunofluorescent photometric...
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4772792 |
Pulser stabilized radiation detector
A radiation detector useful for well logging and other applications contains a stabilizing pulsar device comprising a scintillator coupled to a photodetector and including a radio-active source...
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4771177 |
Point source for testing a gamma camera
A point source for calibrating a gamma camera uses the nuclide cerium-141. The source is disposed in a shuttered, shielded housing. The shutter is incrementally advanceable to expose, over time, an...
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4771172 |
Method of increasing the dynamic range and sensitivity of a quadrupole ion trap mass spectrometer operating in the chemical ionization mode
A method is disclosed for increasing the dynamic range and sensitivity of a quadrupole ion trap mass spectrometer operating in the chemical ionization mode. Prior to mass analysis, a prescan is...
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4768885 |
Temperature monitoring systems
A temperature monitoring system includes a linear array of six pyroelectric sensors mounted in a block. A through hole is provided in the block for each sensor. A bore in the block having an axis...
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4766311 |
Method and apparatus for precision SEM measurements
A method and apparatus for making precise measurements as small as in submicron distances of an object or specimen (13) includes a stage (18) which is movable under the control of a microprocessor...
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4761552 |
Standard for near-infrared reflectance measurement and method of making the same
A fixed stable standard for near-infrared reflectance measurement is provided by using a sample holder having an IR-quartz window and a measured amount of PTFE powder pressed directly thereagainst...
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4760267 |
Method of creating a simulated infrared image using conventional black and white film
A method of forming infrared light patterns is provided to simulate the ration from actual scenes encountered by infrared image detection systems. The patterns are formed using inexpensive black...
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4758725 |
Calibration device for nuclear medicine equipment and it use process
This device comprises a liquid radioactive source which, when the patient is absent, is used for calibrating the ionizing radiation detectors of the apparatus and is located in a container which...
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4755674 |
Infrared detector
An infrared detector has at least one infrared-sensitive detector element and at least one infrared source disposed in a common housing with the detector, with the infrared radiation from the...
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4749872 |
Document scan apparatus with reflective reference position marker
A document scan apparatus in which the position of a document support table relative to an optical system is detected during the relative movement between the document support platen and the...
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4746195 |
Method for adjusting coupling optics and the end of a waveguide relative to a semiconductor laser
A method and apparatus for positioning a laser diode with respect to a coupling optic for a waveguide to obtain the optimum light transmission characterized by providing a reflecting reference...
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4744626 |
Connector for optical fiber and receiving or emitting photoelement and method of positioning an optical fiber endface relative to photoemitter
A fiber optic connector comprises a planar holder, such as a printed circuit board, on which a photoelement is secured along a reference axis coaxial with an end of an optical fiber in a...
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4728787 |
Alignment process for an electro-optical device
A process of aligning electro-optical devices that associate a semiconductor, laser diode or electroluminescent component with an optical component, such as an optical fiber. These devices must be...
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4726688 |
Monitored background radiometer
This radiometer accurately measures IR and solar spectrum radiation in a vacuum, and accounts for radiation loss from its sensing plate by measuring the housing temperature. Calibration is...
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4724330 |
Self aligning raster input scanner
A system for calibrating a raster input scanning device for detecting an image on a preselected surface, including a linear photoelectric sensor array comprising a plurality of discrete...
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4723077 |
Dual liquid crystal light valve based visible-to-infrared dynamic image converter system
A visible-to-infrared image converter system (10) utilizes a source of infrared light (15), a polarizing beam splitter (19) for separating the infrared light into two polarized beams having their...
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4722609 |
High frequency response multilayer heat flux gauge configuration
Double-sided, high-frequency response heat flux gauge for use on metal turbine blading consists of a metal film (1500A) resistance thermometer sputtered on both sides of a thin (25 μm) polyimide...
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4722095 |
Method for identifying porosity and drilling mud invasion of a core sample from a subterranean formation
A core sample invaded by drilling mud is scanned with X-rays and computed tomographic images are produced. The images are calibrated to a density scale based on the barite content of the drilling...
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4718879 |
Device for fitting and adjusting an encoder
A device for fitting and adjusting an encoder comprising a first inclined plate and a second inclined plate joined together rotatably between an encoder fitting surface and a fitting flange, a...
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4713537 |
Method and apparatus for the fine position adjustment of a laser beam
On an essentially non-absorbing plate located in the focal plane of a laser beam to be adjusted, a plurality of marks is arranged in a definite pattern. The marks deflect the laser light incident...
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4710629 |
Infrared intrusion detector
In an infrared intrusion detector which evaluates the body radiation of an intruder by means of a dual radiation sensor having two sensor elements arranged in a differential circuit for emitting an...
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4701868 |
Apparatus and method for accurately measuring the density of materials with rough surfaces by radiation backscatter
The present invention provides a nuclear radiation backscatter gauge and method by which an accurate determination of the density of a test material can be made, even though the test material may...
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4700059 |
Chromatographic optical detector with logarithmic calibration circuit
An optical detector is provided. The optical detector provides automatic zeroing of a logarithmic ration function in applications such as absorption meters, fluorometers and other chromatographic...
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4697280 |
Method and apparatus for the measurement of X-ray sources
An X-ray measurement device (20) is disclosed which utilizes a pair of detector units (29, 30) which receive X-rays through filters (40, 41) of differing attenuation of X-rays. The detector units...
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4697077 |
Vane encoder assembly for adjusting an optical encoder in a data storage device
Accurate gap adjustments in an optical encoder used in a magnetic disk drive are achieved within a vane encoder assembly which incorporates a four-bar linkage. The optical encoder includes a fixed...
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4695720 |
Optoelectronic incremental measuring system with adjustable LED positioning
An optoelectronic incremental measuring system for measuring lengths or angles comprises a scale member provided with an incremental scale and a scanning unit, which is adjustable along the scale...
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4694165 |
Bulk material analyzer calibration block
A calibration block is used for calibrating a bulk material analyzer that has an activation region in which bulk material is received for analysis and a chute for passing the bulk material through...
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4692616 |
Basis weight gauge standardizing method and system
A system and method are disclosed for standardization a basis weight gauge for measuring the weight per unit area of sheet material. The method includes the calibration steps of obtaining two...
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4692621 |
Digital anesthetic agent analyzer
A gas analyzer is described comprising a sample cell for containing a gas mixture to be analyzed, a source for producing and directing infrared energy through the sample cell, a rotary filter wheel...
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