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5745231 |
Method of fluorescence analysis comprising evanescent wave excitation and out-of-plane photodetection
Fluorescence measuring methods and apparatus use planar optical waveguides to excite fluorescence in the evanescent field of the waveguides and photodetectors to sense the fluorescence produced....
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5738997 |
Method of assay of enzymatic activity and apparatus therefor
Method of assay of enzymatic activity, comprising projecting excitation light to a sample containing an enzyme, a substrate which forms a product by action of the enzyme, and a reference substance...
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5731867 |
Analyzer for analyzing erythrocytes in urine with flow cytometry
An analyzer for analyzing urine material components includes: a sheath flow cell for forming a sample stream containing the urine material components; a light source for illuminating the sample...
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5721613 |
Fluorescence spectrometer
A fluorescence spectrometer comprises a light source with a flashlamp (2), means (9) for selecting an excitation wavelength, a sample cuvette (11), means (16) for spectrally separating the...
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5716850 |
Monitoring the colour and bitterness of beer
A method of determining one or both of the colour and bitterness of beer by illuminating the beer with light of a pre-determined wavelength, typically 400±30 nm, to cause iso-α-acids in the beer...
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5686988 |
Gas concentration measurement instrument based on the effects of a wave-mixing interference on stimulated emissions
A method and apparatus for measuring partial pressures of gaseous components within a mixture. The apparatus comprises generally at least one tunable laser source, a beam splitter, mirrors, optical...
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5663050 |
Sensor for antigen-antibody reactions
A multi-purpose on-line or field-portable system and method for monitoring the presence and concentration of selected antigen-antibody reactions singly or in combination that result from the...
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5652810 |
Fiber optic sensor for site monitoring
A fiber optic sensor system for analyzing fluid systems is described which comprises a sampling probe which transmits tunable ultraviolet light to a sampling location, the probe including an...
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5650846 |
Microcolumnar analytical system with optical fiber sensor
An analytical system for analyzing a fluid sample is disclosed. The analytical system includes a microcolumn for conducting the fluid sample, a light source for delivering light through the...
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5641640 |
Method of assaying for an analyte using surface plasmon resonance
In a method of assaying for an analyte in a fluid sample, the presence of the analyte is detected by determining the resulting change in refractive index at a solid optical surface in contact with...
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5637458 |
Apparatus and method for the detection and assay of organic molecules
A system for biomolecular separation and detection of a molecular species includes a solid state laser detector having a sample channel therein. The presence of a molecular species is indicated by...
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5633711 |
Measurement of material properties with optically induced phonons
Samples such as thin polymeric films are analyzed using optically induced phonons by excitation of the sample using radiation preferably absorbed by the sample and probe radiation, preferably not...
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5631170 |
Method for improving measurement precision in evanescent wave optical biosensor assays
A method for improving measurement precision in an optical biosensor assay for a ligand in a sample is described. The method involves referencing the assay with an artificially raised background...
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5627641 |
Isotopic analysis process by optical emission spectrometry on laser-produced plasma
Isotopic analysis process by optical emission spectrometry on laser-produced plasma. According to the invention, the sample to be analyzed (10) is irradiated by a laser beam (20) to produce a...
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5617205 |
Spectral measuring method and spectral measuring apparatus
Excitation light from a light source is divided into a sample beam and a correction beam by a half mirror, so that the sample beam is converged on a sample in a sample part by convergent lenses....
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5615008 |
Optical waveguide integrated spectrometer
An analytical system uses a waveguide having embedded Bragg gratings to redirect light from the waveguide outwardly for analytical determination by detectors. The analytical system can be a...
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5609744 |
Assembly suitable for identifying a code sequence of a biomolecule in a gel embodiment
An assembly suitable for identifying a code sequence of at least a portion of a biomolecule in a gel embodiment. The assembly comprises first means for migrating and separating a portion of a...
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5608519 |
Laser apparatus and method for microscopic and spectroscopic analysis and processing of biological cells
An apparatus and method for microscopic and spectroscopic analysis and processing of biological cells. The apparatus comprises a laser having an analysis region within the laser cavity for...
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5608520 |
Plasma emission spectroscopy method of tumor therapy
Disclosed are a method and apparatus for performing photon diagnostics using a portable and durable apparatus which incorporates the use of a remote sensing probe in fiberoptic communication with...
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5604588 |
Imaging plasma in nonlinear limiter cells
A method to examine laser induced plasma or bubble formations in nonlinear limiter cells includes splitting a laser pulse into an initiation pulse, a first probe pulse and a second probe pulse. The...
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5592283 |
Testing of concrete by laser ablation
A method of testing concrete in a structure in situ, by: directing a succession of pulses of laser radiation at a point on the structure so that each pulse effects removal of a quantity of concrete...
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5591407 |
Laser diode sensor
A chemical sensor uses a semiconductor diode laser having a surface active region. A laser structure, including an active layer, a cladding layer, a barrier layer and a grating layer, is...
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5589351 |
Fluorescence detection apparatus
A fluorescence analysis system detects light transmitted from wells in a sample plate. One embodiment of the system includes a single light detector. A reflector is capable of receiving light from...
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5583634 |
Process for elementary analysis by optical emission spectrometry on plasma produced by a laser in the presence of argon
A process for simultaneously blowing a gas jet onto a sample 6 to be analyzed and subsequently focusing a laser beam 4 onto the sample so as to produce a plasma 12 on the surface of the sample. An...
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5578499 |
Homogeneous immunoassay system employing fourier transform infrared spectroscopy
The present invention relates to an homogeneous immunoassay system for the determination of an antibody or an antigen in a sample which consists of an interferometric signal emitted from an...
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5573956 |
Assay method based upon refractive index changes at a solid optical surface
A method of assaying for an analyte in a fluid sample comprises detecting the presence of the analyte by determining the resulting change in refractive index at a solid optical surface in contact...
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5568007 |
Lamp unit and optical analyzer using the same
A lamp unit is provided with a projecting portion on the inner wall of the lamphouse in the vicinity of the arc portion. The lamphouse is ventilated by the van provided at one end of the lamphouse...
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5561069 |
Surface plasmon resonance detector having collector for eluted ligate
An improved surface plasmon resonance detector, capable of recovering a desired eluted ligate, permits the isolation and characterization of novel ligates and ligands.
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5557544 |
Spectrometer with dynamically coded components
In an analytic spectrometer (50) having a central computer (9), permanently installed and exchangeable components (5), such as a radiation source, a detector, a beam splitter, a filter, external...
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5548124 |
Decay characteristic measuring apparatus
An excitation light beam intensity-modulated and output from a light-sending unit is irradiated on a target measurement object. A scattered light beam or a reaction light beam is detected by a...
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5541064 |
Methods and apparatus for immunoploidy analysis
A method and apparatus are provided for selecting and analyzing a subpopulation of cells or cell objects for a certain parameter such as DNA using image analysis means. The cells are first stained...
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5537206 |
Method for analyzing steel and apparatus therefor
A method for analyzing steel which comprises: grinding an analysis area of a steel ingot; sealing the analysis area with a sealing section of a cell for generating fine particles; again grinding...
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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,...
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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,...
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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...
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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...
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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 signal...
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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...
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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...
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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...
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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...
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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 a...
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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...
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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...
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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...
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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...
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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 fluorescent...
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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...
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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....
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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....
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