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5537207 Process for determining carbon black concentration and distribution in rubber compounds and other carbon black containing materials and device to carry out the process  
To determine the carbon black distribution two measurements of spectral intensities of separately produced plasmas are carried out with different time delays relative to a particular laser pulse,...
5532817 Method of optical inspection  
A method for determining the configuration of a resin portion of an article comprising exposing the article to a light source at a first wavelength and measuring emission of light at a second,...
5528045 Particle analyzer with spatially split wavelength filter  
A fluorescence particle analyzer includes a flow tube through which particles marked with different fluorochromes pass from a first location to a second location. Emissions from the first and...
5526170 Fiber optic continuous true time-delay modulator  
The fiber optic true time delay modulator generates a continuously variable true time-delay (i.e., phase shift) by utilizing the dispersion characteristic of a single mode optical fiber. The...
5525240 Adaptively controlled centrifugation method  
An apparatus and method are disclosed in which the centrifugation of a liquid mixture in order to separate out components of the mixture with different sedimentation rates is adaptively controlled...
5515162 Low noise light source for forensic examination  
In accordance with the present invention, a low noise light source for illuminating a treated or untreated deposition of material for forensic examination is disclosed. A light having a wide range...
5504337 Method and apparatus for performing phase fluorescence lifetime measurements in flow cytometry  
A method and apparatus for identifying individual particles or cells which have been labeled with different fluorochromes, on the basis of the lifetime of their fluorescence, or based on different...
5500536 Spectrofluorometer  
A fluorescence output port sandwiched between light-shielding members of a sample cell is provided at a position corresponding to an entrance slit of a fluorescence monochromator and an excitation...
5498875 Signal processing for chemical analysis of samples  
A method and apparatus determines the analyte content of a sample by generating first and second input signals and directing the input signals to the sample. The input signals differ in wavelength...
5492840 Surface plasmon resonance sensor unit and its use in biosensor systems  
Methods for functionalizing sensing surfaces to be used in systems for measuring simultaneously several properties of one biomolecule as well as for simultaneously measuring the concentrations of...
5490490 On-board gas composition sensor for internal combustion engine exhaust gases  
An on-board gas composition sensor is disclosed for monitoring oxygen content levels in the exhaust gas of an internal combustion engine. The gas composition sensor includes a light source for...
5486904 Method for determining resin particles in paper stocks  
The free resin particles which present problems in papermaking are determined according to number and size in order to bind them to the wood fibers by adding assistants and hence render them...
5486915 On-line measurement of lignin in wood pulp by color shift of fluorescence  
Lignin concentrations from wood pulp samples are measured by applying an excitation light at a selected wavelength to the samples in order to cause the lignin to emit fluorescence. A spectral...
5485269 System for minimizing native fiber fluorescence variations in fiber optic sensors  
An optical system for minimizing native fluorescence variations from a fiber optic laser induced fluorescence sensor comprises a fiber probe for receiving excitation light which is capable of...
5484571 Enhanced fluorescence detection of samples in capillary column  
A simple device for collecting a greater amount of fluorescent emission from a minute sample in a capillary column. An axially symmetrical paraboloid reflector is implemented to collect...
5483546 Sensor system for remote spectroscopy  
A sensing system for high sensitivity spectroscopic measurements is described. An optically pumped passively Q-switched laser emits laser light of a first frequency at a sensing site....
5483338 Method and apparatus for evaluating structural weakness in polymer matrix composites  
A method and apparatus for evaluating structural weaknesses in polymer matrix composites is described. An object to be studied is illuminated with laser radiation and fluorescence emanating...
5480775 Method for measuring a specimen by the use of fluorescent light  
A method of and an apparatus for measuring a specimen by the use of fluorescence light which has the step of dyeing the specimen with a fluorescence dye, the step of applying light to the dyed...
5480562 Method of purifying water controlled by laser scanning  
A system and method is disclosed for purifying water for drinking or bathing purposes employing an optical scanning device for detecting organisms in the water such as bacteria, algae, or viruses....
5478755 Long range surface plasma resonance immunoassay  
A method of assaying for a ligand in a sample involves incubating the sample in contact with a specific binding partner for the ligand carried on one surface of an optical structure, irradiating...
5469255 Method and apparatus for spectrometric measurement of particulate surfaces  
A method of spectrometry is disclosed for measuring transient absorbance and transient absorption spectrum of a substance to be measured at interfaces in liquid phase of particulates containing a...
5459567 Method for determining the degree of spectral interference in an assay having a test sample  
A method to determine the degree of spectral interference in an assay containing a test sample in which a graph plot of efficiency versus ratio of a fluorescence label is a known standard. The...
5459325 High-speed fluorescence scanner  
A high-speed fluorescence scanner for scanning a sample at equal angles is disclosed. The scanner has most of its optical components, including a light beam source, a detector, and various...
5455674 Method and apparatus for forensic examination of surfaces  
A method of illuminating a deposition of organic material such as, blood, sweat or oil for forensic examination is disclosed. Light having a wide range of wavelengths is generated and directed...
5452723 Calibrated spectrographic imaging  
The present application is directed to the use of photon migration analysis to provide a method of analyzing the diffuse reflectance, fluorescence, Raman or other types of spectra obtained from...
5446538 Process and device for emission spectorscopy  
Process for emission spectroscopy, particularly for laser emission spectropy, wherein the radiation emitted by the laser-induced plasma of the workpiece to be analyzed is decomposed by a...
5444527 Imaging flow cytometer for imaging and analyzing particle components in a liquid sample  
An imaging flow cytometer for capturing images and, analyzing particle components in a liquid sample containing particle components such as blood and urine, or microparticles such as organic high...
5436718 Mutli-functional photometer with movable linkage for routing optical fibers  
A multi-functional photometer includes a scanning mechanism having a housing (10) that bears a movable linkage (12). The linkage is coupled to an optical scanning head (18) and incorporates...
5432061 Method and apparatus for detecting microorganisms  
The present invention describes a method and apparatus for detecting microorganisms in a large number of blood culture vials using more than one microorganism detection principle for each vial....
5430541 High efficiency fluorescence flow cell for capillary liquid chromatography or capillary electrophoresis  
A fluorescence flow cell having a capillary through which a sample fluid is moved, an optical source that directs an exposing beam of light through the sample fluid, a collector that collects...
5424825 Spectral-band filtration spectrometry apparatus  
The filtration means filter the exciter radiation (EX) in a first forward direction from generator means (LS) to the specimen (EC), by allowing a second spectral band (BZ) of predetermined...
5422712 Apparatus for measuring fluorescent spectra of particles in a flow  
A sample liquid flow containing particle components such as blood and urine is illuminated with light, and signals from particles are detected, and the particles are thereby analyzed. In this...
5422719 Multi-wave-length spectrofluorometer  
A multi-wavelength spectrofluorometer suitable for operation in laboratory, process control environments and in the field. The unit includes a multi-source flash tube, slits, diffraction grating...
5399866 Optical system for detection of signal in fluorescent immunoassay  
An imaging system responsive to focused laser light includes a focusing lens for focusing the laser light and a mirror having a reflective side, a non-reflective side, and a hole for passing a...
5400137 Photometric means for monitoring solids and fluorescent material in waste water using a stabilized pool water sampler  
Turbidity and fluorescence measurements are taken simultaneously from a waste water sample in a stabilized pool of water in order to determine both the amount of solids and the amount of...
5383200 Eye safe laser imaging system  
An active night vision system capable of viewing a target over long distances utilizes laser illumination in eye-safe, invisible wavelength regions of about 1.52-1.76 μm or about 2.03 μm-2.34 μm...
5381224 Scanning laser imaging system  
A scanning optical imaging or mapping system for macroscopic specimens is disclosed, which allows both confocal and non-confocal imaging to be performed in reflected light, photoluminescence,...
5379103 Method and apparatus for in situ detection of minute amounts of trace elements  
A mobile laboratory for in situ detection of organic and heavy metal pollutants in ground water is disclosed. Pulsed laser energy is delivered via fiber optic media to create a laser spark on a...
5377004 Remote optical measurement probe  
A holographic probe facilitates the measurement of radiative effects such as Raman scattering or fluorescence of a remotely disposed sample. Improving upon prior-art techniques, the probe teaches...
5374563 Surface plasmon resonance device and method of determining biological, biochemical, or chemical analyte  
A sensor based on the technique of surface plasmon resonance (SPR) comprises an SPR device, a source of electromagnetic radiation from which radiation can be directed onto the device, and a...
5371016 Detecting biological activities in culture vials  
An apparatus for detecting microorganisms in a plurality of sealable containers adapted to sustain microorganism growth includes a single light source such as a laser with a two-dimensional laser...
5371586 Low aberration diffraction grating system  
A light analysis system is disclosed and comprises a source of substantially collimated light to be analyzed. The source comprises a sample excited by a collimated laser light source, and further...
5369496 Noninvasive method and apparatus for characterizing biological materials  
Biological material is characterized by illuminating the material with a beam of light, measuring light scattered from the material and then determining the condition of the material using the...
RE34782 Fluorometer  
A fluorometer for measuring a particular fluorescence emanating from a specimen and operating in accordance with the following method. Producing a burst of concentrated light energy and directing...
5363189 Spectroscopic analysis method and analyzing system  
A plurality of elements in a sample are specified as monitoring elements. Each time at a exciting the sample, the light intensity of the line of the monitoring elements and the measured elements...
5352412 Apparatus for generating pyrolyzates of microscopic particles  
An optical microscope supports a housing having a closed chamber in which a particle to be pyrolyzed is disposed and is exposable to a targeting laser beam for precisely positioning the particle...
5338415 Method for detection of chemicals by reversible quenching of silicon photoluminescence  
An n-type silicon (Si) wafer is galvanostatically etched in a hydrofluoric acid (HF)-containing solution while being illuminated with a 300 watt tungsten light source to form porous silicon with...
5329353 High sensitive multi-wavelength spectral analyzer  
A compact, high sensitive, multi-wavelength spectral analyzer capable of simultaneously obtaining a spectral distribution of extremely weak radiation such as bioluminescence, chemiluminescence,...
5329352 Spectroscopically correlated light scanning microscopy  
The present invention relates to a process for producing and correlating light microscope images and spectroscopic data resolved according to wavelength of a sample by scanning individual elements...
5327225 Surface plasmon resonance sensor  
An optical fiber surface plasmon resonance (SPR) sensor includes both a metal layer and an overlay or underlay material on its surface. Existing fiber based SPR devices are inherently incapable of...