| Patents for G01J 1 - Photometry, e.g. photographic exposure meter (22,989) |
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| 11/05/1991 | US5063462 LED array and partitive driving method therefor using overlapping activation periods |
| 11/05/1991 | US5063297 Apparatus for detecting fluorescence of a luminescent material |
| 11/05/1991 | US5063287 Processing circuit for optical combustion monitor |
| 11/05/1991 | US5062686 Optical sensors and optical fibre networks for such sensors |
| 10/31/1991 | DE4012984A1 Personal UV dosimeter - for use by sun-bather to indicate sunburn risk |
| 10/30/1991 | EP0454488A2 Apparatus for detecting fluorescence of a luminescent material |
| 10/30/1991 | EP0454398A2 Thermal detector device |
| 10/29/1991 | US5061076 Time-resolved fluorometer |
| 10/29/1991 | US5061066 Method for realizing a primary photometric standard of optical radiation using a photodetector and photodetecting apparatus therefor |
| 10/29/1991 | US5061064 Detector of the arrival angle of laser pulses, especially for tanks |
| 10/29/1991 | US5061026 Light rod assembly for spark detection system |
| 10/29/1991 | US5060508 Gas sample chamber |
| 10/27/1991 | WO1991016607A1 Semiconductor film bolometer thermal infrared detector |
| 10/23/1991 | CN1014478B X-ray photocathode, image enhancer and imaging instrument |
| 10/22/1991 | US5059359 Methods and apparatus for production of three-dimensional objects by stereolithography |
| 10/22/1991 | US5059021 Apparatus and method for correcting for drift in production of objects by stereolithography |
| 10/22/1991 | US5058988 Apparatus and method for profiling a beam |
| 10/16/1991 | CN1055429A Gas turbine flame detection system with refrected flame radiation attenuator |
| 10/10/1991 | DE4011453A1 Coating for passive IR detector components - comprises hydrophilic material on one or more components in beam path to prevent water droplet formation |
| 10/09/1991 | EP0450388A2 Scintillation camera apparatus and method implementing a localized positioning algorithm |
| 10/09/1991 | EP0449936A1 Sensor for an air-conditioning system in a vehicle. |
| 10/08/1991 | US5055690 Method of eliminating water vapor interference in detecting gases |
| 10/02/1991 | DE4110473A1 Investigating relative material effects by characteristic wavelengths - ascertaining characteristic factors such as transmission, dispersion, reflection by spectrophotometry |
| 10/02/1991 | DE4009826A1 Pulsed laser radiation measurer - uses pyroelectric detector spring-suspended in vacuum chamber esp. for energy in UV and VUV ranges |
| 10/02/1991 | CN1055065A Semiconductor laser electric field distribution measuring method and device thereof by continuous electrooptic detecting technique |
| 10/01/1991 | US5053626 Dual wavelength spectrofluorometer |
| 10/01/1991 | US5053614 Exposure control method and apparatus compensating for detection of offset from a measured value |
| 10/01/1991 | US5052804 Non-imaging optical detector with variable field-view |
| 09/25/1991 | EP0448465A1 Optical Detection Method with Variable Detection Threshold |
| 09/25/1991 | EP0448310A1 Gas turbine flame detection system |
| 09/25/1991 | EP0447907A1 Illumination arrangement for the exposure of a photomultiplier in a double beam photometer |
| 09/25/1991 | EP0447598A1 Infrared detecting circuit |
| 09/24/1991 | US5051597 Radiation dosage indicator |
| 09/24/1991 | US5050991 High optical density measuring spectrometer |
| 09/24/1991 | CA1289395C High energy laser beam replica producing method and system |
| 09/19/1991 | WO1991014170A1 Process for determining the condition of a road surface |
| 09/19/1991 | DE4008280A1 Indicating ice etc. on road surface - using IR detector and halogen lamp source with beam modulator and narrow bandpass filter |
| 09/18/1991 | EP0447311A1 Device for the characterization of a light beam |
| 09/18/1991 | EP0446859A1 Chemical luminescence-detecting apparatus |
| 09/17/1991 | US5049751 Infrared rays detecting apparatus |
| 09/17/1991 | US5049741 Electromagnetic wave shielding system for optical sensor having an aperture |
| 09/17/1991 | US5049730 Automatic shutter for low light sensing and amplifying device |
| 09/17/1991 | US5048969 Piezoelectric measurement of laser power |
| 09/17/1991 | CA1289219C Temperature compensated moisture sensor |
| 09/17/1991 | CA1289217C Photodetector having cascaded photoelements |
| 09/12/1991 | DE4007321A1 Wave or phase front measurement for electromagnetic waves - has detector and optical input coupling supported by thermally stabilised carrier |
| 09/10/1991 | US5047645 Thin film infrared laser detector and monitor |
| 09/10/1991 | US5047640 Web inspecting method |
| 09/10/1991 | US5047620 Laser pulse receiver for detecting and recording weak laser pulses in variable background radiation |
| 09/10/1991 | CA1288623C Optical system for wide angle ir imager |
| 09/10/1991 | CA1288611C Chromatographic optical detector |
| 09/06/1991 | WO1991014338A1 Multisensor high-resolution camera |
| 09/06/1991 | CA2077676A1 Multisensor high-resolution camera |
| 09/05/1991 | DE4006618A1 Generating laser beam for measuring and analysis - involves separating measurement beam from main beam by reflection in grooves in flat metal mirror |
| 09/04/1991 | EP0444689A2 A compensation method adapted for use in color measuring apparatus |
| 09/04/1991 | EP0275283B1 Low noise preamplification stage |
| 09/04/1991 | CN1054335A Infrared receiver with electric colour split |
| 09/03/1991 | US5045707 Laser detection and discrimination system |
| 09/03/1991 | US5045684 Light detection with waveguide having fully and partially reflecting sides |
| 09/03/1991 | US5045123 Thermopile |
| 09/03/1991 | US5044754 Apparatus and method for use in determining the optical transmission factor or density of a translucent element |
| 08/29/1991 | DE4106042A1 Light absorption measuring system |
| 08/29/1991 | DE4105192A1 Polarimetric testing of surface properties and transparent material - by evaluating difference between reflected s and p polarised components |
| 08/29/1991 | DE4004986A1 Measuring intensity of EM radiation from source - using detector on axis of symmetry behind optical axicon |
| 08/28/1991 | EP0443702A2 Measuring method for determining small light absorptions |
| 08/28/1991 | EP0443497A2 Rear light detecting apparatus in a camera |
| 08/28/1991 | EP0335915A4 Solution loading analyzer |
| 08/27/1991 | US5043608 Correction circuit |
| 08/27/1991 | US5043584 Photon-counting type streak camera device |
| 08/27/1991 | US5043572 Optical pyrometer including fiber optic and silicon microstructure |
| 08/27/1991 | US5043571 CCD photosensor and its application to a spectrophotometer |
| 08/27/1991 | US5043568 Optical signal detector incorporating means for eluminating background light |
| 08/27/1991 | US5043565 Process and circuit for compensating changes |
| 08/27/1991 | US5042950 Apparatus and method for laser beam diagnosis |
| 08/21/1991 | EP0442738A2 Variable wavelength light filter and sensor system |
| 08/21/1991 | EP0442351A1 Infrared temperature sensor |
| 08/21/1991 | EP0442166A1 Illuminometers containing photochromatic substances |
| 08/21/1991 | EP0442112A2 Method and apparatus of photodetection |
| 08/21/1991 | EP0441898A1 Optical sensing apparatus and method. |
| 08/21/1991 | EP0441866A1 Probe assembly for infrared thermometer. |
| 08/21/1991 | EP0407429A4 Fluid pollution monitor |
| 08/21/1991 | CN1053955A Method of measuring ultrasmall optical losses |
| 08/14/1991 | EP0441603A2 Misfire detection |
| 08/14/1991 | EP0440956A2 Method and apparatus of photodetection |
| 08/14/1991 | DE4004408A1 IR temp. sensor for high temps. |
| 08/13/1991 | US5040033 On same semiconductor chip |
| 08/13/1991 | US5039225 Apparatus for measurement of reflection density |
| 08/10/1991 | WO1991012498A1 Radiation dosage indicator |
| 08/07/1991 | EP0440443A2 Multispectral reflectometer |
| 08/07/1991 | EP0439525A1 Luminescence or fluorescence monitoring apparatus and method. |
| 08/06/1991 | US5037198 Illuminant discriminator with improved boundary conditions |
| 07/31/1991 | EP0439094A1 A wavelength sensitive photon detector |
| 07/31/1991 | CN1013406B Process and instrument for discrimination and measuring of gauss light beam |
| 07/31/1991 | CA2035224A1 Multispectral reflectometer |
| 07/30/1991 | US5036311 UV Exposure monitoring system |
| 07/30/1991 | US5036188 Remote-control-light detecting device for AV apparatus |
| 07/30/1991 | US5035770 Methods of making surface relief gratings |
| 07/30/1991 | US5035508 Light absorption analyser |
| 07/29/1991 | CA2008798A1 Method of measuring ultra-small optical losses |
| 07/25/1991 | WO1991010897A1 Measurement of luminescence |