Patents
Sitemap › G01 - Measuring; Testing › G01N - Investigating or analysing materials by determining their chemical or physical properties › G01N 21 - Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light
Patents for G01N 21 - Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light (181,396)
10/1991
10/15/1991US5057275 Analytic reader device
10/15/1991US5057216 Capillary flow cell
10/15/1991CA1290670C Chemiluminescence method for assaying compounds containing primary amino groups using 1-cyano-2-substituted benz¬f|-or naphth¬f|-isoindole fluorescers
10/15/1991CA1290658C Transparent test strip system
10/12/1991WO1991015758A1 Methods and apparatus allowing sequential chemical reactions
10/12/1991CA2079005A1 Methods and apparatus allowing sequential chemical reactions
10/10/1991DE4109521A1 Multi-angle spectral photometer measuring colours - has light transmitters set at different emergent angles with reflected light intercepted by single receiver
10/10/1991DE4108434A1 Photo-thermal microscopy arrangement - feeds measurement beam to remote plane contg. beam coupling and thermal measures
10/09/1991EP0450814A1 Pipe inspection system
10/09/1991EP0450782A2 Fiberoptic interferometric sensor
10/09/1991EP0450727A1 Plasma generator
10/09/1991EP0450580A2 Method for determining the pretilt angle of liquid crystal molecules in a liquid crystal cell
10/09/1991EP0450519A2 Ionic component sensor and method for making and using same
10/09/1991EP0450305A1 Sensor with optical fibre
10/09/1991EP0450256A1 Optical fibre probe
10/09/1991EP0450174A1 Device for optoelectrically measuring interfacial level and refractive index of fluids
10/09/1991EP0450057A1 Scanning sensor system including an interferometer
10/09/1991EP0449900A1 A method of photometric in vitro determination of a blood gas parameter in a blood sample.
10/09/1991EP0449899A1 A METHOD OF PHOTOMETRIC -i(IN VITRO) DETERMINATION OF THE CONTENT OF OXYGEN IN A BLOOD SAMPLE.
10/09/1991EP0449820A1 Radiation/microbe bioassay
10/09/1991EP0324733B1 A moisture indicator
10/09/1991EP0199767B1 A fluorescence imaging system
10/08/1991US5055699 Device for measuring the refractive index of a fluid, in particular intended for measuring the density of that fluid or the concentration of a substance dissolved in that fluid
10/08/1991US5055694 Method and apparatus for monitoring and measuring the concentration of ion exchange resin particles in water
10/08/1991US5055690 Method of eliminating water vapor interference in detecting gases
10/08/1991US5055688 Multicomponent infrared gas analyzer
10/08/1991US5055684 System to reduce wave shift error in spectrophotometer caused by hot spots in the light source
10/08/1991US5055679 Surface analysis method and apparatus
10/08/1991US5055410 Colorimetric analysis;detecting reaction product of indicator and contaminants
10/08/1991US5055409 Method for reducing interferences in the analysis of substances which form volatile hydrides
10/08/1991US5055267 Thin film environmental monitor
10/08/1991US5055265 Biological sensors
10/08/1991US5054930 Scanning apparatus
10/08/1991US5054928 System for compensating antenna membrane deflection
10/08/1991US5054921 Doppler-free spectroscopy
10/08/1991US5054920 Internal reflectance cell having improved sample flow geometry
10/08/1991US5054919 Seal for high pressure and small volume sample cells
10/08/1991US5054916 Liver function testing apparatus
10/08/1991US5054914 Apparatus for analysis of volatile samples by atomic spectroscopy
10/08/1991US5054882 Multiple optical fiber event sensor and method of manufacture
10/08/1991US5054869 Light pipe system having maximum radiation throughput
10/08/1991US5054317 Device for monitoring and/or measuring parameters of a running, thread-like or wire-like test material and method for operating the device
10/08/1991CA1290246C Photo densitometer
10/08/1991CA1290227C Test device and method of determining concentration of a sample component
10/06/1991CA2039882A1 Test carrier for the analysis of fluids
10/03/1991WO1991015836A1 Simple fire detector
10/03/1991WO1991014934A1 Color measurement
10/03/1991WO1991014933A1 Automated process for permeability determinations of barrier resins
10/02/1991EP0449597A2 Highly directional optical system and optical sectional image forming apparatus employing the same
10/02/1991EP0449573A2 Gas detection device
10/02/1991EP0449434A2 Multi-cell module for spectrophotometry
10/02/1991EP0449295A1 Novel quinoxalinone derivative
10/02/1991EP0448931A2 Method for measuring a specimen by the use of fluorescence light
10/02/1991DE4110473A1 Investigating relative material effects by characteristic wavelengths - ascertaining characteristic factors such as transmission, dispersion, reflection by spectrophotometry
10/02/1991DE4109938A1 Surface defect detector for flat or cylindrical objects - has separator optically dividing two photoreceivers intercepting reflected light originating from laser beam generator
10/02/1991DE4010004A1 Measurements of gas concentrations - by passing monochromatic radiation through gas contained in vessel through movable part reflecting end surfaces
10/02/1991CN1055062A Ruby discriminating lens and manufacturing method thereof
10/02/1991CN1055061A Fiberoptic interferometric sensor
10/01/1991WO1991015867A1 Reservoir fiber optic chemical sensors
10/01/1991US5054087 Process and apparatus for optically checking perforations in hollow articles such as turbine blades
10/01/1991US5053822 Densitometer for measuring marking particle density on a photoreceptor having a compensation ratio which adjusts for changing environmental conditions and variability between machines
10/01/1991US5053754 Simple fire detector
10/01/1991US5053702 Apparatus for magnetic particle inspection with an adjustable cable for magnetizing inspection areas of variable dimensions
10/01/1991US5053699 Scanning electron microscope based parametric testing method and apparatus
10/01/1991US5053629 Microdensitometer with submicron resolution having dual diaphragms and dual microscopes
10/01/1991US5053626 Dual wavelength spectrofluorometer
10/01/1991US5053623 Photometric analyzer for differential total reduced sulfur measurement by comparison with sample gas
10/01/1991US5052818 Method of and apparatus for measuring very low water content in gas
10/01/1991US5052806 Apparatus for measuring non-absorptive scattering
10/01/1991US5052805 Ventilation unit for a flame photometric detection device
10/01/1991US5052802 Device for viewing beneath circuit boards
10/01/1991CA2078785A1 Reservoir fiber optic chemical sensors
09/1991
09/29/1991WO1991014957A1 Waterproof focs
09/29/1991WO1991014956A1 Fiber optic refractive index sensor using metal cladding
09/29/1991CA2078786A1 Waterproof fiber optic chemical sensors
09/29/1991CA2078784A1 Fiber optic refractive index sensor using metal cladding
09/28/1991CA2038980A1 Gas detection device
09/27/1991CA2036435A1 Reagent unit
09/26/1991DE4105107A1 Continuous flow esp. flow injection analysis system - has capillary system for distribution of specimen in carrier medium with electrodes for applying electric field
09/26/1991DE4102146C1 Rain and dirt sensor for motor vehicle windscreen - uses light source below or at inner side of pane and light measurer at top or outside
09/25/1991EP0448089A2 Optical probe to determine the turbidity of a solution by immersion
09/25/1991EP0448061A2 Glow discharge atomic emission spectroscopy and apparatus thereof
09/25/1991EP0448052A2 Method for making a gas sensing element
09/25/1991EP0447992A1 Gas liquid separator
09/25/1991EP0447949A1 Optical oxygen sensor
09/25/1991EP0447931A2 Infrared laser fibre optics gas detection device
09/25/1991EP0447848A2 Scanner calibration method and apparatus for generating defined amplitudes of scattered light
09/25/1991EP0447747A2 Apparatus and method for injecting compounds in plasma for ICP-OES analysis
09/25/1991EP0447739A1 A method and a device for the objective evaluation of the crushing of pile fabrics, particularly velvets for covering motor vehicle seats
09/25/1991EP0447708A2 Apparatus and method for quantitative examination and high-resolution imaging of human tissue
09/25/1991EP0447598A1 Infrared detecting circuit
09/25/1991EP0447475A1 Optoelectronic sensing device.
09/25/1991CN1054832A Method for testing solid surface and boundary characteristics
09/25/1991CN1054830A Multi-wavelength photometer controlled by microcomputer
09/24/1991US5051901 Method for judging errors in applying liquid samples during biochemical analysis
09/24/1991US5051872 Hemispherical non-glare illuminator
09/24/1991US5051825 Dual image video inspection apparatus
09/24/1991US5051602 Optical system and method for sample analyzation
09/24/1991US5051551 Immersion probe for infrared internal reflectance spectroscopy
09/24/1991US5051370 Agitation with tumbling, placing the mixture in the rays path, focusing an image and evaluation
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